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asp.net更新指定记录的方法

2017年12月12日  | 移动技术网IT编程  | 我要评论

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本文实例讲述了asp.net更新指定记录的方法。分享给大家供大家参考。具体方法如下：

我们先来看html页面：

复制代码 代码如下:
<%@ page language="c#" autoeventwireup="true"  codefile="default.aspx.cs" inherits="_default" %>
 <form id="form1" runat="server">
         
        <div style="text-align: center">
            <table style="width: 302px; height: 246px;">
                <tr>
                    <td colspan="2" style="width: 496px">
                        <asp:label id="label2" runat="server" text="更新指定数据" font-bold="true" forecolor="blue" width="132px"></asp:label></td>
                </tr>
                <tr>
                    <td colspan="2" style="width: 496px">
        <asp:gridview id="gridview1" runat="server" autogeneratecolumns="false" cellpadding="4" font-size="smaller" forecolor="#333333" gridlines="none">
            <columns>
                <asp:boundfield datafield="商品编号" headertext="商品编号" />
                <asp:boundfield datafield="商品名称" headertext="商品名称" />
                <asp:boundfield datafield="商品数量" headertext="商品数量" />
                <asp:boundfield datafield="商品单价" headertext="商品单价" />
                <asp:hyperlinkfield datanavigateurlfields="商品编号" datanavigateurlformatstring="default.aspx?商品编号={0}"
                    headertext="更新" text="更新" />
            </columns>
            <footerstyle backcolor="#5d7b9d" font-bold="true" forecolor="white" />
            <rowstyle backcolor="#f7f6f3" forecolor="#333333" />
            <editrowstyle backcolor="#999999" />
            <selectedrowstyle backcolor="#e2ded6" font-bold="true" forecolor="#333333" />
            <pagerstyle backcolor="#284775" forecolor="white" horizontalalign="center" />
            <headerstyle backcolor="#5d7b9d" font-bold="true" forecolor="white" />
            <alternatingrowstyle backcolor="white" forecolor="#284775" />
        </asp:gridview>
                    </td>
                </tr>
                <tr>
                    <td colspan="2" style="width: 496px" align="center">
                         </td>
                </tr>
                <tr>
                    <td colspan="2" style="width: 496px">
                        <asp:label id="label3" runat="server" font-size="smaller" text="商品名称：" width="65px"></asp:label><asp:textbox id="txtname" runat="server"></asp:textbox>
                    </td>
                </tr>
                <tr>
                    <td colspan="2">
                        <asp:label id="label4" runat="server" font-size="smaller" text="商品数量："></asp:label>
        <asp:textbox id="txtnum" runat="server"></asp:textbox></td>
                </tr>
                <tr>
                    <td colspan="2">
                        <asp:label id="label5" runat="server" font-size="smaller" text="商品单价："></asp:label>
        <asp:textbox id="txtprice" runat="server"></asp:textbox></td>
                </tr>
                <tr>
                    <td colspan="2" style="width: 496px">
                         <asp:button id="btnupdate" runat="server" onclick="btnupdate_click" text="更新" width="55px" /></td>
                </tr>
            </table>
        </div>
    </form>

由上面页面提交过来的数据我们接受然后利用sql执行更新数据库
复制代码 代码如下:
view code
using system;
using system.configuration;
using system.data;
using system.linq;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.htmlcontrols;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.xml.linq;
using system.data.sqlclient;
public partial class _default : system.web.ui.page
{
    protected void page_load(object sender, eventargs e)
    {
        if (!page.ispostback)//首次执行页面时
        {
            gridviewbind();//绑定自定义方法gridviewbind
            if (request.querystring["商品编号"] != null)//判断，如果可以获取到id的值，则执行以下操作
            {
                sqlconnection con = new sqlconnection(configurationsettings.appsettings["strcon"]);
                con.open();
                sqldataadapter ada = new sqldataadapter("select * from tb_shopping05 where 商品编号=" + request.querystring["商品编号"] + "", con);
                dataset ds = new dataset();
                ada.fill(ds, "tb_shopping05");
                datarowview drv = ds.tables["tb_shopping05"].defaultview[0];
                this.txtname.text = drv["商品名称"].tostring();
                this.txtnum.text = drv["商品数量"].tostring();
                this.txtprice.text = drv["商品单价"].tostring();
            }
        }
    }
    public void gridviewbind()//绑定gridview控件的自定义方法
    {
        sqlconnection con = new sqlconnection(configurationsettings.appsettings["strcon"]);
        con.open();
        sqldataadapter ada = new sqldataadapter("select * from tb_shopping05", con);
        dataset ds = new dataset();
        ada.fill(ds);
        gridview1.datasource = ds;
        gridview1.databind();
        con.close();
    }
    protected void btnupdate_click(object sender, eventargs e)
    {
        try
        {
            sqlconnection con = new sqlconnection(configurationsettings.appsettings["strcon"]);
            con.open();
            sqlcommand com = new sqlcommand("update tb_shopping05 set 商品名称='" + this.txtname.text + "',商品数量='" + this.txtnum.text + "',商品单价='" + this.txtprice.text + "' where 商品编号=" + request["商品编号"], con);
            com.executenonquery();
            gridviewbind();
            response.write("<script language=javascript>alert('恭喜您！信息更新成功！')</script>");
        }
        catch
        {
            response.write("<script language=javascript>alert('很遗憾！信息更新失败！')</script>");
        }
    }
}

原理是这样的，我们点击经编辑的数据时会传一个id过来，然后我们再利用sql把接受过来的数据进行update即可了。

希望本文所述对大家的asp.net程序设计有所帮助。

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