Question

我有一个带有模板字段的GridView，而连接字符串位于 web.config 文件。数据由存储过程提取。我想在protected void someMethod(object sender, EventArgs e)事件的OnClick="someMethod"中检索Gridview的单个单元格值。但它最终得到：

对象引用未设置为对象的实例。

生成OnClick事件的代码：

<asp:TemplateField >
           <ItemTemplate> 
           <asp:LinkButton ID="LinkButton1" runat="server" OnClick="someMethod">Get Name</asp:LinkButton>
                   </ItemTemplate>
                   </asp:TemplateField>

我想得到的Gridview Cell的价值是：

<asp:TemplateField HeaderText="Name">
                     <EditItemTemplate>
                         <asp:TextBox ID="forNames" runat="server"></asp:TextBox>
                     </EditItemTemplate>
                     <ItemTemplate>
                         <asp:Label ID="eForNames" runat="server" Text = '<%# Eval("Name") %>'></asp:Label>
                     </ItemTemplate>
                 </asp:TemplateField>

代码背后是：

 protected void someMethod(object sender, EventArgs e)
    {
 Label ename = diplayAdapter.SelectedRow.FindControl("eForNames") as Label;
            Label5.Text = ename.Text; 
}

Answer 1

.ASPX代码：

<asp:TemplateField >
    <ItemTemplate> 
       <asp:LinkButton ID="LinkButton1" CommandArgument="<%# Container.DisplayIndex %>" runat="server" CommandName="FindName">Get Name</asp:LinkButton>
    </ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
    <EditItemTemplate>
        <asp:TextBox ID="forNames" runat="server"></asp:TextBox>
    </EditItemTemplate>
    <ItemTemplate>
        <asp:Label ID="eForNames" runat="server" Text = '<%# Eval("Name") %>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>

.CS代码

protected void GridView1_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
    try
    {
        //getting rowindex which we have selected by using CommandArgument
        int rowindex = Convert.ToInt32(e.CommandArgument);
        if (e.CommandName == "FindName")
        {
           Label5.Text= GridView1.Rows[rowindex].Cells[1].FindControl("eForNames");
        }
    }
    catch (Exception ex)
    {
        Response.Write(ex);
    }
}

使用C＃从自定义方法ASP.NET中的GridView中获取单元格值

1 个答案: