DefaultValuesNeeded fails on Successive (repeated) Calls

[John]

I have an Hierarchy GridView with two levels.  In the child gridview I want to Add a New Row, however I need to set some default values in the row, so I have used the DefaultValuesNeeded event to populate the new row with the required defaults.

This works well within one child view, however if I move to a different child view and try to Add a New Row, the DefaultValuesNeeded function fails with an error - NullReferenceException was unhandled.  This error is coming from the e.row.cells().value.

Here is the code that both works and fails:

Private Sub rgvVoucherServices_DefaultValuesNeeded(ByVal sender As Object, _
        ByVal e As Telerik.WinControls.UI.GridViewRowEventArgs) _
        Handles rgvVoucherServices.DefaultValuesNeeded
        If TypeOf (rgvVoucherServices.CurrentRow) Is GridViewNewRowInfo Then
            With e.Row
                .Cells("ELS_ELVKey").Value = rgvVoucherServices.CurrentRow.ViewInfo.ParentRow.Cells("ELV_Key").Value
                .Cells("ELS_LastUpdAction").Value = "I"
                .Cells("ELS_LastUpdBy").Value = GlobalParameters("UserKey")
                .Cells("ELS_LastUpdWhen").Value = Now
            End With
        End If
    End Sub

Is there a problem with the way that I have implemented this method?

[Jack]

Hi John,

Thank you for reporting this issue.

I confirm that it appears in our latest release - Q1 2010 SP1 and I logged it in our bug tracking system. It will be addressed in one of our upcoming releases. I updated also your Telerik points.

Regards,
Jack
the Telerik team

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[Lighthouse Developer]

Hi Jack  and thank you  for your support

I want to ask if this bug is addressed in some beta etc version

or if a workaround exists,because I'm experiencing the same behavior

of DefaultValuesNeeded function in the Q1 2010 SP2 release.

Thank you very much again

[Jack]

Hello,

This issue will be addressed in our upcoming Q2 2010 Beta due in the beginning of the next week. You can subscribe to our blogs RSS Feed which will inform you when the Beta is public.

All the best,

Jack
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[John Reynolds]

I'm seeing the same problem, with the latest release of Telerik Winforms.

Can someone please confirm that this still hasn't been addressed?

[Jack]

Hi John,

Thank you for contacting us. Just to note, our latest release is Q1 2011 SP1. Could you please confirm whether the issue appears in this release? If this is true, send us your application and we will try to locate the problem.

I am looking forward to your reply.
 
Kind regards,
Jack
the Telerik team

[Robert]

I'm experiencing the same problem in 2013.1.321.40. 

I'm using a master template with a child template. I need default values when adding a new row to the master template, but not the child template. The DefaultValuesNeeded event for the master template looks like this:

Private Sub GridViewPriceCurve_DefaultValuesNeeded(sender As System.Object, e As Telerik.WinControls.UI.GridViewRowEventArgs) Handles GridViewPriceCurve.DefaultValuesNeeded
    e.Row.Cells("ProductManager").Value = My.User.Name
    e.Row.Cells("IsCustom").Value = True
    e.Row.Cells("CreatedOn").Value = DateTime.Now
End Sub

This works fine for the master template but I get a null reference error when adding a new record to the child template. The child template doesn't have any of the columns in common with the master template. 

Any recommendations?

[Stefan]

Hi Robert,

You can just check whether the Row template matches the desired template:

Private Sub radGridView1_DefaultValuesNeeded(sender As Object, e As GridViewRowEventArgs)
    If e.Row.ViewTemplate = radGridView1.MasterTemplate Then
          'set default values
    End If
End Sub

I hope this helps.
 
Regards,
Stefan
Telerik

[Robert]

That works. Thank you!

[Thomas]

When I try to add the below statement I get an error:
Operator '=' is not defined for types 'Telerik.WinControls.UI.GridViewTemplate' and 'Telerik.WinControls.UI.MasterGridViewTemplate'

Can you help me please.

If e.Row.ViewTemplate = RadGridView1.MasterTemplate Then
     'set default values
EndIf

[Stefan]

Hello Thomas,

Here is what you can use instead: 

If e.Row.ViewTemplate.Equals(RadGridView1.MasterTemplate) Then
    'set default values
End If

Regards,
Stefan
Telerik