Question

我正在尝试访问Repeater中的控件。该控件位于＆lt; ItemTemplate＆gt;内。标签。我正在使用FindControl，但它总是出来Null。我做错了什么？

Answer 1

我的猜测是，FindControl只能用于记录级事件，例如ItemDataBound：

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    (ControlTypeCast) e.Item.FindControl("myControl")).SomeProperty = "foo";
}

Answer 2

我猜你正试图在页面生命周期的错误点找到一个控件。 ItemDataBound事件是您需要查找它的地方。

这个例子在vb.net中，但我相信你明白了。

Protected Sub rp_items_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rp_items.ItemDataBound
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim someLiteral As Literal = e.Item.FindControl("someliteral")
    End If
End Sub

Answer 3

在大多数情况下，拼写控件名称错误:)也可能是您正在搜索另一个容器中存在的控件。你可以发布你的代码吗？

Answer 4

试试这个

对于vb.net

CType(e.Item.FindControl("myControl"), Literal).Text = "foo"

对于c＃

[Literal]e.item.FindControl["myControl"].Text="foo";

Answer 5

         for (int i = 0; i <= repeater1.Items.Count - 1; i++)
         {
             Button delete = (Button)repeater1.Items[i].FindControl("btnDelete");
             delete.Visible = true;
             Button edit = (Button)repeater1.Items[i].FindControl("btnEdit");
             edit.Visible = true;
         }

Vb.net

        For i As Integer = 0 To Repeater1.Items.Count - 1

        Dim CmbTyp As DropDownList = DirectCast(Repeater1.Items(i).FindControl("DropDownList1"),DropDownList)
        Dim SeatN As Label = DirectCast(Repeater1.Items(i).FindControl("label1"), Label)

        styp = CmbTyp.SelectedItem.Text.Trim
        sNo = SeatN.Text



    Next

在ASP中找到一个控件：Repeater

5 个答案: