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灵活掌握asp.net中gridview控件的多种使用方法（下）

2017年12月12日 | 移动技术网IT编程 | 我要评论

上海 pm2.5,双色球预测neiba,诗涵

继续上篇文章的学习，在此基础上巩固gridview控件的操作使用，更上一层楼。

11.gridview实现用“...”代替超长字符串：
效果图：

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;
}

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;

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();
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];
gintro = convert.tostring(mydrv["家庭住址"]);
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);
}
}

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

////当有编辑列时，避免出错，要加的rowstate判断
//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?')");
//}

}
if (e.row.rowindex != -1)
{
int id = e.row.rowindex + 1;
e.row.cells[0].text = id.tostring();
}

}
}

12.gridview一般换行与强制换行：

效果图：

首先设置<asp:boundfield datafield="家庭住址" headertext="家庭住址" itemstyle-width="100" />
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：
本方案为月儿独创，不同于网上其他方式，我觉得用一个checkbox更人性化，这样可以隐藏不必要的列，让用户自己选择需要出现的列，在处理多列时这是一个很好的解决方案！

效果图：

图1-开始

图2-点击显示的checkbox后

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：

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>gridview显示隐藏列 </title>
</head>
<body style="font-size=12px">
<form id="form1" runat="server">
<div>
<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" >
<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" />
</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" />
</asp:gridview>
<asp:checkbox id="checkbox1" runat="server" font-size="12px"
oncheckedchanged="checkbox1_checkedchanged" text="显示隐藏家庭住址" /></div>
</form>
</body>
</html>

14.gridview弹出新页面/弹出制定大小位置新窗口：

效果图：

方案一：简单的方法，新窗口不固定大小

<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" >
<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 headertext="姓名" text="姓名" datanavigateurlfields="姓名" datanavigateurlformatstring="default6.aspx?goodsid={0}" target="mainframe" navigateurl="~/default6.aspx" datatextfield="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" />
</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" />
</asp:gridview>

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

方案二：精确控制弹出窗口大小位置

<asp:hyperlinkcolumn datanavigateurlfield="employeeid" datanavigateurlformatstring="javascript:varwin=window.open('detail.aspx?id={0}',null,'width=300,height=200');window.close();"
datatextfield="lastname" headertext="lastname"></asp:hyperlinkcolumn>

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

效果图：

代码：

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>gridview固定表头</title>
<style>
.freezing
{

position:relative ;
table-layout:fixed;
top:expression_r(this.offsetparent.scrolltop);
z-index: 10;
}

.freezing th{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}
</style>
</head>
<body style="font-size=12px">
<form id="form1" runat="server">
<div style="overflow-y: scroll; height: 200px;width:300px" id="dvbody">
<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" onrowcreated="gridview1_rowcreated" >
<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" />

</columns>
<rowstyle forecolor="#000066" />
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white" />
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" cssclass="ms-formlabel datagridfixedheader"/>
<headerstyle backcolor="#006699" font-bold="true" forecolor="white" cssclass="freezing"/>
</asp:gridview>
</div>

</form>
</body>
</html>

用法：css设如上的样式，headerstyle加cssclass="freezing，套住gridview的div设置高度宽度 <div style="overflow-y: scroll; height: 200px;width:200px" >

16.gridview合并表头多重表头无错完美版（以合并3列3行举例）

效果图：

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 _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)
{
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();
sqlcon.close();
}

//这里就是解决方案
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</th></tr><tr>";

//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</th></tr><tr>";

//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：

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>gridview合并多重表头表头</title>
</head>
<body >
<form id="form1" runat="server">
<div >
<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" onrowcreated="gridview1_rowcreated" >
<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" headertext="起薪" />
<asp:boundfield datafield="家庭住址" headertext="家庭住址" />
<asp:boundfield datafield="邮政编码" headertext="邮政编码" />

</columns>
<rowstyle forecolor="#000066" />
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white" />
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" cssclass="ms-formlabel datagridfixedheader"/>
<headerstyle backcolor="#006699" font-bold="true" forecolor="white" />
</asp:gridview>
</div>

</form>
</body>
</html>

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）

效果图：

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：

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
<title>gridview突出显示某一单元格 清清月儿http://blog.csdn.net/21aspnet </title>
</head>
<body >
<form id="form1" runat="server">
<div >
<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" >
<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" headertext="起薪" dataformatstring="{0:c}" 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" />

</columns>
<rowstyle forecolor="#000066" />
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white" />
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" cssclass="ms-formlabel datagridfixedheader"/>
<headerstyle backcolor="#006699" font-bold="true" forecolor="white" />
</asp:gridview>
</div>

</form>
</body>
</html>

18.gridview加入自动求和求平均值小计

效果图：

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();
}
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();
}
private double sum = 0;//取指定列的数据和
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();

}
}
}

前台：唯一的花头就是设置showfooter="true" ，否则默认表头为隐藏的！

<asp:gridview id="gridview1" runat="server" cellpadding="3" onrowediting="gridview1_rowediting"
onrowupdating="gridview1_rowupdating" onrowcancelingedit="gridview1_rowcancelingedit" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" onrowdatabound="gridview1_rowdatabound" showfooter="true" >
<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="家庭住址" headertext="家庭住址" />
<asp:boundfield datafield="邮政编码" headertext="邮政编码" />
<asp:boundfield datafield="起薪" headertext="起薪" />

</columns>
<rowstyle forecolor="#000066" />
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white" />
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" cssclass="ms-formlabel datagridfixedheader"/>
<headerstyle backcolor="#006699" font-bold="true" forecolor="white" />
</asp:gridview>

19.gridview数据导入excel/excel数据读入gridview

效果图：

解决方案：
页面增加一个按钮，单击事件添加如下方法：

protected void button1_click(object sender, eventargs e)
{
export("application/ms-excel", "学生成绩报表.xls");
}

private void export(string filetype, string filename)
{
response.charset = "gb2312";
response.contentencoding = system.text.encoding.utf7;
response.appendheader("content-disposition", "attachment;filename=" + httputility.urlencode(filename, encoding.utf8).tostring());
response.contenttype = filetype;
this.enableviewstate = false;
stringwriter tw = new stringwriter();
htmltextwriter hw = new htmltextwriter(tw);
gridview1.rendercontrol(hw);
response.write(tw.tostring());
response.end();
}
//如果没有下面方法会报错类型“gridview”的控件“gridview1”必须放在具有 runat=server 的窗体标记内
public override void verifyrenderinginserverform(control control)
{
}

还有由于是文件操作所以要引入名称空间io和text

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;
using system.io;
using system.text;
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();

}
}

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();
}

protected void button1_click(object sender, eventargs e)
{
export("application/ms-excel", "学生成绩报表.xls");
}

private void export(string filetype, string filename)
{
response.charset = "gb2312";
response.contentencoding = system.text.encoding.utf7;
response.appendheader("content-disposition", "attachment;filename=" + httputility.urlencode(filename, encoding.utf8).tostring());
response.contenttype = filetype;
this.enableviewstate = false;
stringwriter tw = new stringwriter();
htmltextwriter hw = new htmltextwriter(tw);
gridview1.rendercontrol(hw);
response.write(tw.tostring());
response.end();
}
public override void verifyrenderinginserverform(control control)
{
}

}

前台：

<asp:gridview id="gridview1" runat="server" cellpadding="3"
backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" font-size="12px" >
<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="姓名" />
<asp:boundfield datafield="出生日期" headertext="邮政编码" />
<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 datafield="起薪" headertext="起薪" />

</columns>
<rowstyle forecolor="#000066" />
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white" />
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left" cssclass="ms-formlabel datagridfixedheader"/>
<headerstyle backcolor="#006699" font-bold="true" forecolor="white" />
</asp:gridview>
<asp:button id="button1" runat="server" onclick="button1_click" text="导出" />

读取excel数据的代码：这个很简单的

private dataset createdatasource()
{
string strcon;
strcon = "provider=microsoft.jet.oledb.4.0;data source=" + server.mappath("excel.xls") + "; extended properties=excel 8.0;";
oledbconnection olecon = new oledbconnection(strcon);
oledbdataadapter myda = new oledbdataadapter("select * from [sheet1$]", strcon);
dataset myds = new dataset();
myda.fill(myds);
return myds;
}
protected void button1_click(object sender, eventargs e)
{
gridview1.datasource = createdatasource();
gridview1.databind();
}

为大家附3个精彩的专题：

asp.net控件使用手册

asp.net数据绑定控件使用汇总

asp.net控件使用汇总

以上就是关于asp.net中gridview控件的多种使用方法，很全面，目的就是想让亲们玩转gridview控件，希望大家喜欢小编整理的这两篇文章。

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灵活掌握asp.net中gridview控件的多种使用方法（下）

2017年12月12日 | 移动技术网IT编程 | 我要评论

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