在gridview中找不到控件

Question

我有一个简单的gridview,其中一行包含一个标签.我试图在RowDataBound事件中访问该标签,但由于某种原因,我不断得到"对象引用未设置为对象的实例".我正在使用FindControl的行上的错误.

我尝试过使用"gvQReport.FindControl","e.Row.FindControl"和"Me.FindControl",但没有任何效果.

我没有这样做吗？

谢谢!

    Protected Sub gvQReport_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
         Dim lblTest As Label = CType(gvQReport.FindControl("lblTest"), Label)
         lblTest.Text = "test Label"
    End Sub


<asp:GridView ID="gvQReport" OnRowDataBound="gvQReport_RowDataBound" runat="server">
     <Columns>
            <asp:TemplateField HeaderText="Test">
                <ItemTemplate>
                    <asp:Label ID="lblTest" runat="server" Text=""></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
     </Columns>
</asp:GridView>

Answer 1

该行的性质GridViewRowEventArgs是当前行,寻找你控制了,而不是整体GridView.

Protected Sub gvQReport_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
     If e.Row.RowType = DataControlRowType.DataRow Then
         Dim lblTest As Label = CType(e.Row.FindControl("lblTest"), Label)
         lblTest.Text = "test Label"
     End If
End Sub