Asp.net中GridView使用详解

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lgridview无代码分页排序

lgridview选中，编辑，取消，删除

lgridview正反双向排序

lgridview和下拉菜单dropdownlist结合

lgridview和checkbox结合

l鼠标移到gridview某一行时改变该行的背景色方法一

l鼠标移到gridview某一行时改变该行的背景色方法二

lgridview实现删除时弹出确认对话框

lgridview实现自动编号

lgridview实现自定义时间货币等字符串格式

lgridview实现用“...”代替超长字符串

lgridview一般换行与强制换行

lgridview显示隐藏某一列

lgridview弹出新页面/弹出新窗口

lgridview固定表头(不用script只用css，2行代码，很好用)

lgridview合并表头多重表头无错完美版（以合并3列3行举例）

lgridview突出显示某一单元格（例如金额低于多少，分数不及格等）

lgridview加入自动求和求平均值小计

lgridview数据导入excel/excel数据读入gridview

1.gridview简单代码分页排序：

1.allowsorting设为true，x代码中是allowsorting="true"；

2.默认1页10条，如果要修改每页条数，修改pagesize即可，在aspx代码中是pagesize="12"。

3.默认的是单向排序的，右击gridview弹出“属性”，选择allowsorting为true即可。

4.添加代码:

 protected void gridview1_pageindexchanging(object sender, gridviewpageeventargs e)
    {
        gridview1.pageindex = e.newpageindex;
        bind();
    }

2.gridview选中，编辑，取消，删除：

后台代码：

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class _default : system.web.ui.page
{
    sqlconnection sqlcon;
    sqlcommand sqlcom;
    string strcon = "data source=(local);database=数据库名;uid=帐号;pwd=密码";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            bind();
        }
    }
    protected void gridview1_rowediting(object sender, gridviewediteventargs e)
    {
        gridview1.editindex = e.neweditindex;
        bind();
    }
//删除
    protected void gridview1_rowdeleting(object sender, gridviewdeleteeventargs e)
    {
        string sqlstr = "delete from 表 where id='" + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcon = new sqlconnection(strcon);
        sqlcom = new sqlcommand(sqlstr,sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        bind();
    }
//更新
    protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
    {
        sqlcon = new sqlconnection(strcon);
        string sqlstr = "update 表 set 字段1='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',字段2='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[2].controls[0])).text.tostring().trim() + "',字段3='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where id='"
            + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcom=new sqlcommand(sqlstr,sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        gridview1.editindex = -1;
        bind();
    }
//取消
    protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
    {
        gridview1.editindex = -1;
        bind();
    }
//绑定
    public void bind()
    {
        string sqlstr = "select * from 表";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "表");
        gridview1.datasource = myds;
        gridview1.datakeynames = new string[] { "id" };//主键
        gridview1.databind();
        sqlcon.close();
    }
}

前台主要代码：

<asp:gridview id="gridview1" runat="server" autogeneratecolumns="false" cellpadding="4" forecolor="#333333" gridlines="none" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit">
                        <footerstyle backcolor="#990000" font-bold="true" forecolor="white">
                        <columns>
                            <asp:boundfield datafield="身份证号码" headertext="用户id" readonly="true">
                            <asp:boundfield datafield="姓名" headertext="用户姓名">
                            <asp:boundfield datafield="员工性别" headertext="性别">
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址">
                            <asp:commandfield headertext="选择" showselectbutton="true">
                            <asp:commandfield headertext="编辑" showeditbutton="true">
                            <asp:commandfield headertext="删除" showdeletebutton="true">
                        </asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>

 

3.gridview正反双向排序：

后台代码：

using system;
using system.data;
using system.configuration;
using system.collections;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default3 : system.web.ui.page
{    sqlconnection sqlcon;
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            viewstate["sortorder"] = "身份证号码";
            viewstate["orderdire"] = "asc";
            bind();
        }
    }
    protected void gridview1_sorting(object sender, gridviewsorteventargs e)
    {
        string spage = e.sortexpression;
        if (viewstate["sortorder"].tostring() == spage)
        {
            if (viewstate["orderdire"].tostring() == "desc")
                viewstate["orderdire"] = "asc";
            else
                viewstate["orderdire"] = "desc";
        }
        else
        {
            viewstate["sortorder"] = e.sortexpression;
        }
        bind();
    }
    public void bind()
    {
       
        string sqlstr = "select top 5 * from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "飞狐工作室");
        dataview view = myds.tables["飞狐工作室"].defaultview;
        string sort = (string)viewstate["sortorder"] + " " + (string)viewstate["orderdire"];
        view.sort = sort;
        gridview1.datasource = view;
        gridview1.databind();
        sqlcon.close();
    }
}

前台主要代码：

<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" data-cke-pa-onsorting="gridview1_sorting">
                        <footerstyle backcolor="white" forecolor="#000066">
                        <columns>
                             <asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
                            <asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
                            <asp:boundfield datafield="员工性别" headertext="性别" sortexpression="员工性别">
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">                               
                        </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview> 

 

4.gridview和下拉菜单dropdownlist结合：

后台代码：

using system;
using system.data;
using system.configuration;
using system.collections;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default4 : system.web.ui.page
{
    sqlconnection sqlcon;
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
    protected void page_load(object sender, eventargs e)
    {
        dropdownlist ddl;
        if (!ispostback)
        {
            string sqlstr = "select top 5 * from 飞狐工作室";
            sqlcon = new sqlconnection(strcon);
            sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
            dataset myds = new dataset();
            sqlcon.open();
            myda.fill(myds, "飞狐工作室");
            gridview1.datasource = myds;
            gridview1.databind();
            for (int i = 0; i <= gridview1.rows.count - 1; i++)
            {
                datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
                if (convert.tostring(mydrv["员工性别"]).trim() == "true")
                {
                    ddl = (dropdownlist)gridview1.rows[i].findcontrol("dropdownlist1");
                    ddl.selectedindex = 0;
                }
                if (convert.tostring(mydrv["员工性别"]).trim() == "false")
                {
                    ddl = (dropdownlist)gridview1.rows[i].findcontrol("dropdownlist1");
                    ddl.selectedindex = 1;
                }
            }
            sqlcon.close();
        }
    }
    public sqldatareader ddlbind()
    {
        string sqlstr = "select distinct 员工性别 from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqlcommand sqlcom = new sqlcommand(sqlstr, sqlcon);
        sqlcon.open();
        return sqlcom.executereader();
    }

前台主要代码：

<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px">
                        <footerstyle backcolor="white" forecolor="#000066">
                        <columns>
                             <asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
                            <asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
                            <asp:templatefield headertext="员工性别">
                                <itemtemplate>
                                    <asp:dropdownlist id="dropdownlist1" runat="server" datasource="'<%#">' datavaluefield="员工性别" datatextfield="员工性别">
                                    </asp:dropdownlist>
                                </itemtemplate>
                            </asp:templatefield>
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">
                               
                        </asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>

 

5.gridview和checkbox结合：

后台代码：

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default5 : system.web.ui.page
{
    sqlconnection sqlcon;
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            bind();
        }
    }
    protected void checkbox2_checkedchanged(object sender, eventargs e)
    {
        for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
            if (checkbox2.checked == true)
            {
                cbox.checked = true;
            }
            else
            {
                cbox.checked = false;
            }
        }
    }
    protected void button2_click(object sender, eventargs e)
    {
        sqlcon = new sqlconnection(strcon);
        sqlcommand sqlcom;
        for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
            if (cbox.checked == true)
            {
                string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + gridview1.datakeys[i].value + "'";
                sqlcom = new sqlcommand(sqlstr, sqlcon);
                sqlcon.open();
                sqlcom.executenonquery();
                sqlcon.close();
            }
        }
        bind();
    }
    protected void button1_click(object sender, eventargs e)
    {
        checkbox2.checked = false;
        for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
            cbox.checked = false;
        }
    }
    public void bind()
    {
        string sqlstr = "select top 5 * from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "tb_member");
        gridview1.datasource = myds;
        gridview1.datakeynames = new string[] { "身份证号码" };
        gridview1.databind();
        sqlcon.close();
    }
}

前台主要代码：

<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px">
                        <footerstyle backcolor="white" forecolor="#000066">
                        <columns>
                             <asp:templatefield>
                                <itemtemplate>
                                    <asp:checkbox id="checkbox1" runat="server">
                                </asp:checkbox></itemtemplate>
                            </asp:templatefield>
                             <asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
                            <asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
                           
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">
                               
                        </asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
                     <asp:checkbox id="checkbox2" runat="server" autopostback="true" font-size="9pt" text="全选" data-cke-pa-oncheckedchanged="checkbox2_checkedchanged">
                    <asp:button id="button1" runat="server" font-size="9pt" text="取消" data-cke-pa-onclick="button1_click">
                    <asp:button id="button2" runat="server" font-size="9pt" text="删除" data-cke-pa-onclick="button2_click"></asp:button></asp:button></asp:checkbox>

 

6.鼠标移到gridview某一行时改变该行的背景色方法一：

做法：

双击gridview的onrowdatabound事件；

在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：

protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
    {
　　　　//首先判断是否是数据行
            if (e.row.rowtype == datacontrolrowtype.datarow)
            {
                //当鼠标停留时更改背景色
                e.row.attributes.add("onmouseover", "c=this.style.backgroundcolor;this.style.backgroundcolor='#00a9ff'");
                //当鼠标移开时还原背景色
                e.row.attributes.add("onmouseout", "this.style.backgroundcolor=c");
            }
    }

前台代码：

<form id="form1" runat="server">
	<p><asp:gridview allowsorting="true" autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" datakeynames="身份证号码" datasourceid="sqldatasource1" font-size="12px" id="gridview1" onrowdatabound="gridview1_rowdatabound" runat="server"> <columns> <asp:boundfield datafield="身份证号码" headertext="身份证号码" readonly="true" sortexpression="身份证号码"> <asp:boundfield datafield="姓名" headertext="姓名" sortexpression="姓名"> <asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <footerstyle backcolor="white" forecolor="#000066"> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview> <asp:sqldatasource connectionstring="&lt;%$ connectionstrings:北风贸易connectionstring1 %&gt;" datasourcemode="datareader" id="sqldatasource1" runat="server" selectcommand="select top 5 [身份证号码], [姓名], [员工性别], [家庭住址], [邮政编码] from [飞狐工作室]"></asp:sqldatasource></p>
</form>

7.鼠标移到gridview某一行时改变该行的背景色方法二：

做法：和上面的一样就是代码不同

protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
    {
        //如果是绑定数据行
        if (e.row.rowtype == datacontrolrowtype.datarow)
        {
            //鼠标经过时，行背景色变
            e.row.attributes.add("onmouseover", "this.style.backgroundcolor='#e6f5fa'");
            //鼠标移出时，行背景色变
            e.row.attributes.add("onmouseout", "this.style.backgroundcolor='#ffffff'");
        }
    }

8.gridview实现删除时弹出确认对话框：

实现方法：

双击gridview的onrowdatabound事件；

在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：

protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
    {
        //如果是绑定数据行
        if (e.row.rowtype == datacontrolrowtype.datarow)
        {
             if (e.row.rowstate == datacontrolrowstate.normal || e.row.rowstate == datacontrolrowstate.alternate)
            {
                ((linkbutton)e.row.cells[6].controls[0]).attributes.add("onclick", "javascript：return confirm('你确认要删除：/"" + e.row.cells[1].text + "/"吗?')");
            }
        }
    }

9.gridview实现自动编号：

实现方法：

双击gridview的onrowdatabound事件；

在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：

    protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
    {
        if (e.row.rowindex != -1)
        {
            int id = e.row.rowindex + 1;
            e.row.cells[0].text = id.tostring();
        }
    }

注意这时最好把前台的第一列的表头该为“编号”，因为以前的第一列被“吃掉”了。

 

<asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit" data-cke-pa-onrowdatabound="gridview1_rowdatabound" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating">
                        <footerstyle backcolor="white" forecolor="#000066">
                        <columns>
                            <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true">
                            <asp:boundfield datafield="姓名" headertext="用户姓名">
                            <asp:boundfield datafield="员工性别" headertext="性别">
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址">
                            <asp:commandfield headertext="选择" showselectbutton="true">
                            <asp:commandfield headertext="编辑" showeditbutton="true">
                            <asp:commandfield headertext="删除" showdeletebutton="true">
                        </asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>

 

10.gridview实现自定义时间货币等字符串格式：

解决方法：

在asp.net 2.0中，如果要在绑定列中显示比如日期格式等，如果用下面的方法是显示不了的

主要是由于htmlencode属性默认设置为true,已防止xss攻击，安全起见而用的，所以，可以有以下两种方法解决

1、

<asp :gridview="" id="gridview1" runat="server">
<columns>
<asp :boundfield="" datafield="creationdate" dataformatstring="{0:m-dd-yyyy}" headertext="creationdate" htmlencode="false">
</asp></columns>
</asp>

将htmlencode设置为false即可

另外的解决方法为，使用模版列

 

<asp :gridview="" id="gridview3" runat="server">
<columns>
<asp :templatefield="" headertext="creationdate">
<edititemtemplate>
<asp :label="" id="label1" runat="server" text="'<%#">'>
</asp>
</edititemtemplate>
<itemtemplate>
<asp :label="" id="label1" runat="server" text="’<%#">'>
</asp>
</itemtemplate>
</asp>
</columns>
</asp>

前台代码：

<asp:gridview allowsorting="true" autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" datakeynames="身份证号码" datasourceid="sqldatasource1" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowdatabound="gridview1_rowdatabound">
            <columns>
                <asp:boundfield datafield="身份证号码" headertext="身份证号码" readonly="true" sortexpression="身份证号码">
                <asp:boundfield datafield="姓名" headertext="姓名" sortexpression="姓名">
                <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码">
                <asp:boundfield datafield="出生日期" headertext="出生日期" sortexpression="出生日期">
                <asp:boundfield datafield="起薪" headertext="起薪" sortexpression="起薪">
            </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
            <footerstyle backcolor="white" forecolor="#000066">
            <rowstyle forecolor="#000066">
            <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
            <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
            <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
        </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
        <asp:sqldatasource connectionstring="<%$ connectionstrings:北风贸易connectionstring1 %>" datasourcemode="datareader" id="sqldatasource1" runat="server" selectcommand="select top 5 [出生日期], [起薪], [身份证号码], [姓名], [家庭住址], [邮政编码] from [飞狐工作室]"></asp:sqldatasource>

 

附录-常用格式化公式：

{0:c}货币；

{0:d4}由0填充的4个字符宽的字段中显示整数；

{0:000.0}四舍五入小数点保留第几位有效数字；

{0:n2}小数点保留2位有效数字；{0:n2}%小数点保留2位有效数字加百分号；

{0:d}长日期；{0:d}短日期；{0:yy-mm-dd}例如07-3-25；；{0:yyyy-mm-dd}例如2007-3-25

11.gridview实现用“...”代替超长字符串：

解决方法：数据绑定后过滤每一行即可

for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            datarowview mydrv;
            string gintro;
            if (gridview1.pageindex == 0)
            {
                mydrv = myds.tables["飞狐工作室"].defaultview[i];//表名
                gintro = convert.tostring(mydrv["家庭住址"]);//所要处理的字段
                gridview1.rows[i].cells[3].text = substr(gintro, 2);
            }
            else
            {
                mydrv = myds.tables["飞狐工作室"].defaultview[i + (5 * gridview1.pageindex)];
                gintro = convert.tostring(mydrv["家庭住址"]);
                gridview1.rows[i].cells[3].text = substr(gintro, 2);
            }
        } 

调用的方法：

 

    public string substr(string sstring, int nleng)
    {
        if (sstring.length <= nleng)
        {
            return sstring;
        }
        string snewstr = sstring.substring(0, nleng);
        snewstr = snewstr + "...";
        return snewstr;
    }

12.gridview一般换行与强制换行：

首先设置gridview里有一列绑定的数据很长，显示的时候在一行里面显示，页面拉得很宽。原因是连续英文段为一个整体导致的，在rowdatabound中添加上了一句e.row.cells[2].style.add("word-break", "break-all")就可以。如果要给所有的列增加此属性：

 protected void page_load(object sender, eventargs e)
    {
        //正常换行
        gridview1.attributes.add("style", "word-break:keep-all;word-wrap:normal");
        //下面这行是自动换行
        gridview1.attributes.add("style", "word-break:break-all;word-wrap:break-word");
        if (!ispostback)
        {
             bind();//调用数据绑定即可
        }
    }

总之：善用css的word-break:break-all;word-wrap:break-word属性即可，这个属性是通用的对于顽固的南换行问题都可以解决，不局限于gridview。

13.gridview显示隐藏某一列：

解决方案：

public void bind()
    {
        string sqlstr = "select top 5 * from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "飞狐工作室");
        gridview1.datasource = myds;
        gridview1.datakeynames = new string[] { "身份证号码" };
        gridview1.databind();
        sqlcon.close();
        gridview1.columns[3].visible = false;//一开始隐藏
        checkbox1.checked = false;//如果不这样后面的代码会把他true
    }

双击checkbox1，在checkedchanged方法里写上代码，最后代码如下：

 

protected void checkbox1_checkedchanged(object sender, eventargs e)
    {
         gridview1.columns[3].visible=! gridview1.columns[3].visible;
         response.write("gridview1的第4列现在的显示隐藏状态是："+gridview1.columns[3].visible.tostring());
    }

 

注意：checkbox1的autopostback要true！

后台全部代码如下：

 

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;

public partial class _default : system.web.ui.page 
{
    sqlconnection sqlcon;
    sqlcommand sqlcom; 
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            viewstate["sortorder"] = "身份证号码";
            viewstate["orderdire"] = "asc";
            bind();
                   }
    }
    protected void gridview1_rowediting(object sender, gridviewediteventargs e)
    {
        gridview1.editindex = e.neweditindex;
        bind();
    }
    protected void gridview1_rowdeleting(object sender, gridviewdeleteeventargs e)
    {
        string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcon = new sqlconnection(strcon);
        sqlcom = new sqlcommand(sqlstr,sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        bind();
    }
    protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
    {
        sqlcon = new sqlconnection(strcon);
        string sqlstr = "update 飞狐工作室 set 姓名='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='" 
            + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcom=new sqlcommand(sqlstr,sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        gridview1.editindex = -1;
        bind();
    }
    protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
    {
        gridview1.editindex = -1;
        bind();
    }
    public void bind()
    {
        string sqlstr = "select top 5 * from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "飞狐工作室");
        gridview1.datasource = myds;
        gridview1.datakeynames = new string[] { "身份证号码" };
        gridview1.databind();
        sqlcon.close();
        gridview1.columns[3].visible = false;
        checkbox1.checked = false;
    }
    protected void checkbox1_checkedchanged(object sender, eventargs e)
    {
         gridview1.columns[3].visible=! gridview1.columns[3].visible;
         response.write("gridview1的第4列现在的显示隐藏状态是："+gridview1.columns[3].visible.tostring());
    }
}

前台代码：

<form id="form1" runat="server">
	<p><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="姓名" headertext="用户姓名"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:commandfield headertext="选择" showselectbutton="true"> <asp:commandfield headertext="编辑" showeditbutton="true"> <asp:commandfield headertext="删除" showdeletebutton="true"> </asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview> <asp:checkbox autopostback="true" font-size="12px" id="checkbox1" oncheckedchanged="checkbox1_checkedchanged" runat="server" text="显示隐藏家庭住址"></asp:checkbox></p>
</form>

14.gridview弹出新页面：

 <asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating">
                        <footerstyle backcolor="white" forecolor="#000066">
                        <columns>
                            <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true">
                            <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码">
                            <asp:boundfield datafield="家庭住址" headertext="家庭住址">
                            <asp:hyperlinkfield datanavigateurlfields="姓名" datanavigateurlformatstring="default6.aspx?goodsid={0}" datatextfield="姓名" headertext="姓名" navigateurl="~/default6.aspx" target="mainframe" text="姓名">
                    </asp:hyperlinkfield>
                            <asp:commandfield headertext="选择" showselectbutton="true">
                            <asp:commandfield headertext="编辑" showeditbutton="true">
                            <asp:commandfield headertext="删除" showdeletebutton="true">
                        </asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
                        <rowstyle forecolor="#000066">
                        <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
                        <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
                        <headerstyle backcolor="#006699" font-bold="true" forecolor="white">
                    </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>

datanavigateurlfields是链接的字段名，datanavigateurlformatstring是路径。

15.gridview固定表头(不用javascript只用css!，很好用)：

代码：
 

<style type="text/css">
.freezing
   {
   
   position:relative ;
   table-layout:fixed;
   top:expression(this.offsetparent.scrolltop);  
   z-index: 10;
   }
.freezing th{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}</style>
<form id="form1" runat="server">
	<p id="dvbody" style="overflow-y: scroll; height: 200px;width:300px"><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowcreated="gridview1_rowcreated" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:boundfield datafield="姓名" headertext="姓名"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" cssclass="ms-formlabel datagridfixedheader" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" cssclass="freezing" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview></p>
</form>

用法：css设如上的样式，headerstyle加cssclass="freezing，套住gridview的div设置高度宽度

 

16.gridview合并表头多重表头无错完美版（以合并3列3行举例）

后台代码：

 

protected void gridview1_rowcreated(object sender, gridviewroweventargs e)
    {
        switch (e.row.rowtype)
        {
            case datacontrolrowtype.header:
                //第一行表头
                tablecellcollection tcheader = e.row.cells;
                tcheader.clear();
                tcheader.add(new tableheadercell());
                tcheader[0].attributes.add("rowspan", "3"); //跨row
                tcheader[0].attributes.add("bgcolor", "white");
                tcheader[0].text = "";
                tcheader.add(new tableheadercell());
                //tcheader[1].attributes.add("bgcolor", "red");
                tcheader[1].attributes.add("colspan", "6"); //跨column
                tcheader[1].text = "全部信息";
                //第二行表头
                tcheader.add(new tableheadercell());
                tcheader[2].attributes.add("bgcolor", "darkseagreen");
                tcheader[2].text = "身份证号码";
                tcheader.add(new tableheadercell());
                tcheader[3].attributes.add("bgcolor", "lightsteelblue");
                tcheader[3].attributes.add("colspan", "2");
                tcheader[3].text = "基本信息";
                tcheader.add(new tableheadercell());
                tcheader[4].attributes.add("bgcolor", "darkseagreen");
                tcheader[4].text = "福利";
                tcheader.add(new tableheadercell());
                tcheader[5].attributes.add("bgcolor", "lightsteelblue");
                tcheader[5].attributes.add("colspan", "2");
                tcheader[5].text = "联系方式";
                //第三行表头
                tcheader.add(new tableheadercell());
                tcheader[6].attributes.add("bgcolor", "khaki");
                tcheader[6].text = "身份证号码";
                tcheader.add(new tableheadercell());
                tcheader[7].attributes.add("bgcolor", "khaki");
                tcheader[7].text = "姓名";
                tcheader.add(new tableheadercell());
                tcheader[8].attributes.add("bgcolor", "khaki");
                tcheader[8].text = "出生日期";
                tcheader.add(new tableheadercell());
                tcheader[9].attributes.add("bgcolor", "khaki");
                tcheader[9].text = "薪水";
                tcheader.add(new tableheadercell());
                tcheader[10].attributes.add("bgcolor", "khaki");
                tcheader[10].text = "家庭住址";
                tcheader.add(new tableheadercell());
                tcheader[11].attributes.add("bgcolor", "khaki");
                tcheader[11].text = "邮政编码";
                break;
        }
    }
}

前台：

 

 

 

17.gridview突出显示某一单元格（例如金额低于多少，分数不及格等）

解决方案：主要是绑定后过滤

 gridview1.databind();
        for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
            string score = convert.tostring(mydrv["起薪"]);
            if (convert.todouble(score) < 34297.00)//大家这里根据具体情况设置可能toint32等等
            {
                gridview1.rows[i].cells[4].backcolor = system.drawing.color.red;
            }
        }
        sqlcon.close();

全部后台代码：

 

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
using system.drawing;

public partial class default7 : system.web.ui.page
{
    sqlconnection sqlcon;
    sqlcommand sqlcom;
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            bind();

        }
    }
    protected void gridview1_rowediting(object sender, gridviewediteventargs e)
    {
        gridview1.editindex = e.neweditindex;
        bind();
    }
    protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
    {
        sqlcon = new sqlconnection(strcon);
        string sqlstr = "update 飞狐工作室 set 姓名='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='"
            + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcom = new sqlcommand(sqlstr, sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        gridview1.editindex = -1;
        bind();
    }
    protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
    {
        gridview1.editindex = -1;
        bind();
    }
    public void bind()
    {
        string sqlstr = "select top 10 * from 飞狐工作室";
        sqlcon = new sqlconnection(strcon);
        sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
        dataset myds = new dataset();
        sqlcon.open();
        myda.fill(myds, "飞狐工作室");
        gridview1.datasource = myds;
        gridview1.datakeynames = new string[] { "身份证号码" };
        gridview1.databind();
        for (int i = 0; i <= gridview1.rows.count - 1; i++)
        {
            datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
            string score = convert.tostring(mydrv["起薪"]);
            if (convert.todouble(score) < 34297.00)//大家这里根据具体情况设置可能toint32等等

            {
                gridview1.rows[i].cells[4].backcolor = system.drawing.color.red;
            }
        }
        sqlcon.close();
    }
}

 

前台代码：

<form id="form1" runat="server">
	<p><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:commandfield headertext="编辑" showeditbutton="true"> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="姓名" headertext="姓名"> <asp:boundfield datafield="出生日期" headertext="邮政编码"> <asp:boundfield datafield="起薪" dataformatstring="{0:c}" headertext="起薪" htmlencode="false"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:boundfield datafield="邮政编码" headertext="邮政编码"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:commandfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" cssclass="ms-formlabel datagridfixedheader" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview></p>
</form>

18.gridview加入自动求和求平均值小计

解决方案

private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是int
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
    {
       
        if (e.row.rowindex >= 0)
        {
            sum += convert.todouble(e.row.cells[6].text);
        }
        else if (e.row.rowtype == datacontrolrowtype.footer)
        {
            e.row.cells[5].text = "总薪水为：";
            e.row.cells[6].text = sum.tostring();
            e.row.cells[3].text = "平均薪水为：";
            e.row.cells[4].text = ((int)(sum / gridview1.rows.count)).tostring();
           
        }
    }

后台全部代码：

 

using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
using system.drawing;

public partial class default7 : system.web.ui.page
{
    sqlconnection sqlcon;
    sqlcommand sqlcom;
    string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            bind();

        }
    }
    protected void gridview1_rowediting(object sender, gridviewediteventargs e)
    {
        gridview1.editindex = e.neweditindex;
        bind();
    }
    protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
    {
        sqlcon = new sqlconnection(strcon);
        string sqlstr = "update 飞狐工作室 set 姓名='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
            + ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='"
            + gridview1.datakeys[e.rowindex].value.tostring() + "'";
        sqlcom = new sqlcommand(sqlstr, sqlcon);
        sqlcon.open();
        sqlcom.executenonquery();
        sqlcon.close();
        gridview1.editindex = -1;
        bind();
    

                    

                        

                            
                        
                    
                    


                    
                    

                        

                            

                                
                            
                        
                    

                    
                    

                    

                        
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