DATAGRID : Object reference not set to an instance of an object

V

vickeyurs

Member
Joined
Jun 16, 2003
Messages
8
Location
Dubai
Hi,

This is the first time i am using this forum,

I have an asp application which has datagrid, i am trying to insert dropdownlist inside the rnrdatagrid1 using web matrix

now i have delared the strRnrABC as string before the pageload and rnrLblAbc is the Label ID in Datagrid.

when i bind the grid its coming right but when i click on the edit link that is OnEditCommand="dtgDataGrid1_Edit"

--------------------------------------
Public Sub dtgDataGrid1_Edit(ByVal Sender As Object, ByVal E As DataGridCommandEventArgs)
strRnrAbc = CType(E.Item.FindControl("rnrLblAbc"), Label).Text
rnrDatagrid1.EditItemIndex = CInt(E.Item.ItemIndex)
Binddata()
End Sub

--------------------------------------


i Get the following error :


Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 366:
Line 367: Public Sub dtgDataGrid1_Edit(ByVal Sender As Object, ByVal E As DataGridCommandEventArgs)
Line 368: strRnrAbc = CType(E.Item.FindControl("rnrLblAbc"), Label).Text
Line 369: rnrDatagrid1.EditItemIndex = CInt(E.Item.ItemIndex)
Line 370: Binddata()


Source File: C:\Inetpub\wwwroot\tipsmaster\tipsmaster_app.aspx Line: 368

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
ASP.tipsmaster_app_aspx.dtgDataGrid1_Edit(Object Sender, DataGridCommandEventArgs E) in C:\Inetpub\wwwroot\tipsmaster\tipsmaster_app.aspx:368
System.Web.UI.WebControls.DataGrid.OnEditCommand(DataGridCommandEventArgs e) +110
System.Web.UI.WebControls.DataGrid.OnBubbleEvent(Object source, EventArgs e) +666
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +26
System.Web.UI.WebControls.DataGridItem.OnBubbleEvent(Object source, EventArgs e) +100
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +26
System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) +120
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +115
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +138
System.Web.UI.Page.ProcessRequestMain() +1263


Thanks in advance

one more thing how can we declared withevents in web matrix ??
 
it sounds like that the line
[VB]
strRnrAbc = CType(E.Item.FindControl("rnrLblAbc"), Label).Text
[/VB]

isnt finding a match for a control callled mrLblAbc".
 
Back
Top