ASP.NET GridView 获取选中行某一列的值

后台在RowCommand里面增加如下代码：

 protected void gv_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "ED")
        {
            this.txtValueUserID.Text = e.CommandArgument.ToString();
            Control c = (Control)e.CommandSource;
            GridViewRow g = (GridViewRow)c.NamingContainer;
            this.txtValueUserPwd.Text = g.Cells[1].Text;
            this.txtValueAddress.Text = g.Cells[2].Text;
        }
    }

“ED”表示给Command命令指定的一个名字，可以随便写。

前台代码：

  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" 
    Text="查询数据" Width="137px" />
                <asp:Button ID="btnDelete" runat="server" Text="删除数据" Width="137px" 
    OnClick="btnDelete_Click" />
                <asp:Button ID="btnUpdate" runat="server" Text="修改数据" Width="137px" />
                <asp:GridView ID="gv" runat="server"
            Height="130px" Width="474px" 
            OnRowDataBound="gv_RowDataBound" AutoGenerateColumns="False" 
            Font-Size="Small" onrowcommand="gv_RowCommand">
                    <RowStyle HorizontalAlign="Center" />
                    <Columns>
                        <asp:BoundField DataField="USERID" HeaderText="UserID" />
                        <asp:BoundField DataField="USERPWD" HeaderText="UserPassword" />
                        <asp:BoundField DataField="UserAddress" HeaderText="UserAddress" />
                        <asp:TemplateField HeaderText="Edit">
                            <ItemTemplate>
                                <asp:ImageButton ID="imagebtnEdit" runat="server" 
                            ImageUrl="~/image/icon_edit.gif"  CommandName="ED" 
                            CommandArgument ='<%# Eval("UserID") %>' />
                                &nbsp;
                                <asp:ImageButton ID="imagebtnDelete" runat="server" 
                            ImageUrl="~/image/icon_delete.gif"   CommandName="DE" 
                             OnClientClick="Javascript:return confirm('are you sure?');" 
                            CommandArgument ='<%# Eval("UserID") %>' />
                            </ItemTemplate>
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>
                <br />
                <table style=" 100%;">
                    <tr>
                        <td>
                            <asp:TextBox ID="txtValueUserID" runat="server"></asp:TextBox>
                        </td>
                        <td>
                            <asp:TextBox ID="txtValueUserPwd" runat="server"></asp:TextBox>
                        </td>
                        <td>
                            <asp:TextBox ID="txtValueAddress" runat="server"></asp:TextBox>
                        </td>
                    </tr>
                </table>
            </ContentTemplate>
        </asp:UpdatePanel>

最终效果如图所示，点击后面的编辑按钮“E”的时候，下方的文本框可以得到对应的值: