在GridView单元格中单击Linkbutton不会触发OnRowCommand事件

Question

UI功能:我有一个GridView与几个列。最重要的一列是PcCode，它显示了每行的string值。

预期:当我从PcCode列的一行单击一个单元格时，应该显示另一个GridView。但是，当我试图将asp:LinkButton用于单元格时，事情就不起作用了。当我点击GridView单元格中的asp:LinkButton时，RowCommand不会被触发。我哪里做错了?哪种方式可以实现预期的功能?提前感谢你帮了一个新手。

在下面的代码中，我试图获得RowIndex并通过CommandArgument传递它并使用CommandName。

。aspx代码

<asp:GridView ID="_UIProfitcenterTotalGridView" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="True" PageSize="22" ShowFooter="True" AutoGenerateColumns="False"
    DataKeyNames="ProfitcenterCode" EnableViewState="False" 
    OnRowDataBound="_UIProfitcenterTotalGridView_RowDataBound"
    OnPageIndexChanging="_UIProfitcenterTotalGridView_PageIndexChanging" 
    OnRowCommand="_UIProfitcenterTotalGridView_OnRowCommand">
    <Columns>
       <asp:TemplateField HeaderText="PcCode" InsertVisible="False" 
            ShowHeader="False" SortExpression="ProfitcenterCode" FooterText="Total" FooterStyle-HorizontalAlign="Left">
            <ItemTemplate>
               <asp:LinkButton ID="_UIPCCodeLinkButton" runat="server" Text='<%# Eval("ProfitcenterCode") %>'  
                CommandName="Select" 
                CommandArgument='<%# ((GridViewRow) Container).RowIndex  %>'>
               </asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField> 
...

asp .cs的后台代码

 protected void _UIProfitcenterTotalGridView_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Select")
        {
            int index = Convert.ToInt32(e.CommandArgument);
            GridViewRow row = _UIProfitcenterTotalGridView.Rows[index];
            string ProfitcenterCode = _UIProfitcenterTotalGridView.DataKeys[_UIProfitcenterTotalGridView.SelectedIndex].Values["ProfitcenterCode"].ToString();
        }
    }

选择行后，我需要将所选行的值作为字符串，并与列表进行比较以显示新的GridView。

尝试

• 使用Link_Button_Click(Object sender, EventArgs e)和以下内容，但失败。

  protected void _UIProfitcenterTotalGridView_RowCommand(对象发送方，gridviewcommanddeventargs e){if (e.CommandName == "Select"){string ProfitcenterCode = ((GridViewRow)(((LinkButton) . commandsource).NamingContainer)).Cells[2].Text;}}

Answer 1

我尝试使用LinkButton_Click()事件而不是RowCommand作为jason建议的:

protected void LinkButton_Click(Object sender, EventArgs e)
    {
        LinkButton button = (LinkButton)sender;
        GridViewRow row = (GridViewRow)button.NamingContainer;
        if (row != null)
        {
          string theValue = ((LinkButton)sender).CommandArgument.ToString();
          ...
          ...
          //code for the extra thing I needed to do after selecting a cell value.
        }
     }

然而，我仍然有问题，我弄清楚了。问题是LinkButton没有绑定到行，因此，它不能在选择时传递任何值。缺少的是以下代码:

 if (e.Row.RowType == DataControlRowType.DataRow)
            {
                LinkButton linkButton = new LinkButton();
                linkButton.Text = e.Row.Cells[0].Text; //value of the first column from the grid 
                linkButton.Enabled = true;
                linkButton.Click += new EventHandler(LinkButton_Click); //triggering the LinkButton event here. 
                e.Row.Cells[0].Controls.Add(linkButton);
            }

Answer 2

您可以使用sender对象(调用事件的链接按钮)并从gridview中获取父行。例子:

Protected Sub linkButton_click(ByVal sender As Object, ByVal e As EventArgs)
   'First cast the sender to a link button
   Dim btn As LinkButton = CType(sender, LinkButton)
   'now, if there is a command arguement, you can get that like this
   Dim id As String = btn.CommandArgument
   'to get the gridviewrow that the button is on:
    Dim row As GridViewRow = CType(btn.NamingContainer, GridViewRow)   
End Sub

很难准确地了解你在寻找什么，所以如果我错过了什么，请告诉我，我会补充的。

protected void linkButton_click(object sender, EventArgs e)
{
    //First cast the sender to a link button
    LinkButton btn = (LinkButton)sender;
    //now, if there is a command arguement, you can get that like this
    string id = btn.CommandArgument;
    //to get the gridviewrow that the button is on:
    GridViewRow row = (GridViewRow)btn.NamingContainer;
}

并将链接按钮更改为:

 <asp:LinkButton OnClick="linkButton_click" ID="_UIPCCodeLinkButton"
 runat="server" Text='<%# Eval("ProfitcenterCode") %>'
            CommandName="Select" 
            CommandArgument='<%# ((GridViewRow) Container).RowIndex  %>'>