急：datagrid控件中在editcommand事件中添加dropdowmlist控件，怎样在updatecommand事件中获取它的值？

[liuwaiqiang1981]

datagrid控件中在editcommand事件中添加一个dropdowmlist控件，怎样在updatecommand事件中获取它的值？
Sub Dg1_EditCommand()
Dim mydroplist As New DropDownList
Dg1.Items(e.Item.ItemIndex).Cells(1).Controls.Clear()
Dg1.Items(e.Item.ItemIndex).Cells(1).Controls.Add(mydroplist)
end sub


Sub Dg1_UpdateCommand()

str= CType(e.Item.Cells(1).FindControl("mydroplist"), DropDownList).SelectedItem.Value
end sub

提示：未将对象引用设置到对象的实例。也就是说没有找到mydroplist。我改怎么解决啊？

[真相重于对错]

不要这么做，在datagrid把那一列设为模板列，在edittemplate 里加一dropdownlist id =
"mydropdownlist"
再用你的update
\

[真相重于对错]

或者你在editcommand里
Dim mydroplist As New DropDownList
mydroplist.id = "mydroplist",试试

[不求甚解]

' Visual Basic
Private Sub DataGrid1_ItemCommand(ByVal source As Object, _
ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) _
Handles DataGrid1.ItemCommand
Dim l As Label
l = CType(e.Item.FindControl("Label1"), Label)
If (Not l Is Nothing) Then
LabelText.Text = l.Text
End If
End Sub

// C#
private void DataGrid1_ItemCommand(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
Label l;
l = (Label) e.Item.FindControl("Label1");

if(!(l == null) ){
LabelText.Text = l.Text;
}
}

[不求甚解]

DropDownList e.Item.Cells(1).FindControl("mydroplist")