在Repeater中查找兄弟控件

Question

我有一个 Repeater 结构如下：

<asp:Repeater ID="rptListClaimTypes" runat="server">
    <ItemTemplate>
        <asp:FileUpload ID="fuContract" runat="server" />
        <asp:LinkButton ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" CommandName='<%# Eval("ClaimTypeID")%>' />
    </ItemTemplate>
</asp:Repeater>

点击btnUpload时我需要处理文件上传。我可以使用sender 访问触发子程序的控件。我如何访问fuContract？

Protected Sub btnUpload_Click(sender As Object, e As EventArgs)

    Dim ClaimTypeID As Integer = sender.CommandName
    Dim fuContract As FileUpload = '??

End Sub

Answer 1

使用您当前的事件处理方法，您可以将发送方转换为 LinkBut​​ton，将父级转换为 RepeaterItem，然后使用 FindControl 查找 FileUpload 控件：

Dim fuContract As FileUpload = CType(CType(sender, LinkButton).Parent.FindControl("fuContract"), FileUpload)

我更喜欢使用中继器的 ItemCommand 事件来处理这些类型的事件：

Private Sub rptListClaimTypes_ItemCommand(source As Object, e As RepeaterCommandEventArgs) Handles rptListClaimTypes.ItemCommand

    Dim fuContract As FileUpload = CType(e.Item.FindControl("fuContract"), FileUpload)

End Sub