datagrid and checkbox

[orangelight]

Hi i got this script to try and read a checkbo with a data grid. but i am getting this error
<b>System.NullReferenceException: Object reference not set to an instance of an object.
</b>
on this line
If giftCheckBox.Checked Then

here is my script

Sub pk_updateCommand(ByVal s As Object, ByVal e As DataGridCommandEventArgs)
Dim i As Integer
Dim _item As DataGridItem
Dim dr As DataRow

For i = 0 To dtrEntityList.Items.Count - 1

_item = dtrEntityList.Items(i)
Dim giftCheckBox As CheckBox = _item.FindControl("chkGIft")

If giftCheckBox.Checked Then

Response.Write(giftCheckBox)
End If
Next
vb_contentDetails()

End Sub


<aspataGrid id="dtrEntityList" runat="server" AutoGenerateColumns="False" DataKeyField="content_no_id"
OnEditCommand="hfm_editCommand" onCancelCommand="hfm_CancelCommand" OnUpdateCommand="pk_updateCommand" Width=520px>

<Columns>
<asp:BoundColumn DataField="content_no_id" HeaderText="ID" ReadOnly="true"></asp:BoundColumn>

<asp:TemplateColumn>
<ItemTemplate>
<%#Container.DataItem("content_name")%>
</ItemTemplate>
<EditItemTemplate>
<asp:Textbox id="txtEntityname" text='<%# container.DataItem("content_name") %>' runat="server" />
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<ItemTemplate>
<%# subChge_active(DataBinder.Eval(Container.DataItem, "content_active"))%>
</ItemTemplate>
<EditItemTemplate>
<!-- <asp:Textbox id="txtEntitynumber" text=' <%# subChge_active(DataBinder.Eval(Container.DataItem, "content_active"))%>' runat="server" />/-->
<asp:CheckBox id="chkGIft" runat="server" Checked='<%# DataBinder.Eval(Container.DataItem, "content_active") %>' />

</EditItemTemplate>
</asp:TemplateColumn>

<asp:EditCommandColumn EditText="Edit"
UpdateText="[Update]" CancelText="[Cancel]" ItemStyle-Width="120px" />
</Columns>
</aspataGrid>

can anyone help
thanks in advance
Hesh

 

[jmeckley]

Sub pk_updateCommand(ByVal s As Object, ByVal e As DataGridCommandEventArgs)
   Dim i As Integer
   Dim _item As DataGridItem
   Dim dr As DataRow

   For i = 0 To dtrEntityList.Items.Count - 1
      _item = dtrEntityList.Items(i)
      Dim giftCheckBox As CheckBox = CType(_item.FindControl("chkGIft"), CheckBox)

      If not giftCheckBox is nothing then
         If giftCheckBox.Checked Then 
            Response.Write(giftCheckBox)
         End If
      end if
   Next
   vb_contentDetails()
End Sub

my vb is rusty, but it should look something like this.
1st you must cast the found control to a checkbox
2nd to avoid the error check if the checkbox is null/nothing

Jason Meckley
Programmer
Specialty Bakers, Inc.

 

[orangelight]

vb may be rust, but it works
thanks
Hesh