ASP.Net:为什么我的按钮的单击/命令事件没有在中继器中绑定/触发?

问题描述

这是来自具有转发器的 ascx 的代码:

Here's the code from the ascx that has the repeater:

<asp:Repeater ID="ListOfEmails" runat="server" >
    <HeaderTemplate><h3>A sub-header:</h3></HeaderTemplate>
    <ItemTemplate>
        [Some other stuff is here]
        <asp:Button ID="removeEmail" runat="server" Text="X" ToolTip="remove" />
    </ItemTemplate>
</asp:Repeater>

在转发器的数据绑定和事件的代码隐藏中:

And in the codebehind for the repeater's databound and events:

Protected Sub ListOfEmails_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles ListOfEmails.ItemDataBound
    If (e.Item.ItemType = ListItemType.Item) Or (e.Item.ItemType = ListItemType.AlternatingItem) Then
        Dim removeEmail As Button = CType(e.Item.FindControl("removeEmail"), Button)
        removeEmail.CommandArgument = e.Item.ItemIndex.ToString()

        AddHandler removeEmail.Click, AddressOf removeEmail_Click
        AddHandler removeEmail.Command, AddressOf removeEmail_Command
    End If
End Sub

Sub removeEmail_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Response.Write("<h1>click</h1>")
End Sub

Sub removeEmail_Command(ByVal sender As Object, ByVal e As CommandEventArgs)
    Response.Write("<h1>command</h1>")
End Sub

点击或命令都没有被调用，我做错了什么?

Neither the click or command is getting called, what am I doing wrong?

推荐答案

嵌套在中继器内部的控件不拦截事件.相反，您需要绑定到 Repeater.ItemCommand 事件.

Controls nested inside of Repeaters do not intercept events. Instead you need to bind to the Repeater.ItemCommand Event.

ItemCommand 包含 RepeaterCommandEventArgs 有两个重要的字段:

ItemCommand contains RepeaterCommandEventArgs which has two important fields:

• 命令名称
• 命令参数

举个简单的例子:

void rptr_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
    {
        // Stuff to databind
        Button myButton = (Button)e.Item.FindControl("myButton");

        myButton.CommandName = "Add";
        myButton.CommandArgument = "Some Identifying Argument";
    }
}

void rptr_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    if (e.CommandName == "Add")
    {
        // Do your event
    }
}

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