ASP.Net：为什么我的按钮的点击/命令事件没有在转发器中绑定/触

发布时间：2020-12-15 20:25:39 所属栏目：asp.Net 来源：网络整理

导读：这是来自ascx的具有中继器的代码： asp:Repeater ID="ListOfEmails" runat="server" HeaderTemplateh3A sub-header:/h3/HeaderTemplate ItemTemplate [Some other stuff is here] asp:Button ID="removeEmail" runat="server" Text="X" ToolTip="remove" / /

这是来自ascx的具有中继器的代码：

<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>

在中继器的数据绑定和事件的代码中：

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？

解决方法

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

ItemCommand包含RepeaterCommandEventArgs,它有两个重要的字段：

> CommandName
> CommandArgument

所以,一个微不足道的例子：

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
            }
        }

编辑：Markdown完全希望我的缩进,哦,我应该停止在这个文本框中编写代码.

（编辑：李大同）

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