无法在数据列表中触发删除命令

发布于 2024-11-19 09:56:37 字数 786 浏览 2 评论 0原文

我想触发数据列表控件中的删除命令..但它没有触发..请帮忙..

这是我的代码：

protected void DeleteCommand(object source, DataListCommandEventArgs e)
{
        Label2.Text = "hello";
}

这是我的html代码：

   <asp:DataList ID="DLImages" runat="server" BorderStyle="None" 
         DataKeyField="fId" RepeatColumns="4" 
         RepeatDirection="Horizontal" ShowFooter="False" ShowHeader="False" 
         OnDeleteCommand="DeleteCommand" 
         onitemdatabound="DLImages_ItemDataBound">
             <ItemTemplate>
                   <asp:ImageButton ID="IBDelete" runat="server" BorderStyle="None" CommandName="Delete" ImageUrl="~/Dashboard/Images/dldelete.png" />
             </ItemTemplate>
    </asp:DataList>

原文

I want to fire the Delete Command in Datalist Control .. but it is not firing .. Help please ..

this is my code :

protected void DeleteCommand(object source, DataListCommandEventArgs e)
{
        Label2.Text = "hello";
}

and This is my html code :

   <asp:DataList ID="DLImages" runat="server" BorderStyle="None" 
         DataKeyField="fId" RepeatColumns="4" 
         RepeatDirection="Horizontal" ShowFooter="False" ShowHeader="False" 
         OnDeleteCommand="DeleteCommand" 
         onitemdatabound="DLImages_ItemDataBound">
             <ItemTemplate>
                   <asp:ImageButton ID="IBDelete" runat="server" BorderStyle="None" CommandName="Delete" ImageUrl="~/Dashboard/Images/dldelete.png" />
             </ItemTemplate>
    </asp:DataList>

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无妨# 2024-11-26 09:56:37

你的代码对我来说看起来没问题。它应该触发DeleteCommand。

但问题是，我确信您在 page_load 事件 中绑定了数据列表，但不是在 If(!IsPostBack) 条件下绑定。 当您点击“删除”按钮时会发生什么您的 page_load 事件在您的 DeleteCommand 之前触发，它会重新绑定 DataList 并且您的事件丢失

您的 page_load 事件代码应该如下所示...

If(!IsPostBack) 
{
  DataList binding code goes here......
  ...........................
}

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
    // Bind the DataList here....
}

Your code looks like OK to me. It should fire the DeleteCommand.

But the problem is that I am sure you are binding the Datalist in your page_load event, but not under If(!IsPostBack) condition. What happens when you hit Delete button is your page_load event fires before your DeleteCommand and it rebinds the DataList and your event is lost

Your page_load event code should look like...

If(!IsPostBack) 
{
  DataList binding code goes here......
  ...........................
}

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
    // Bind the DataList here....
}

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