Solved

cannot clear datagridview rows, VB.Net

Posted on 2014-01-09
4
1,090 Views
Last Modified: 2016-02-10
I have a VB.net datagridview in a project, unbound.  In the RowValidated event, I determine whether I need to make a database write.  If I do make a database write, I want to refill the grid, as I need the identity column of the newly added row to appear in the grid.

I use linq to sql to make the database writes, so, while still in the RowValidated event, I call dc.SubmitChanges, then I call my FillGrid (see code).  As soon as I execute the line Me.dgvMKL.Rows.Clear(), I get the error:

Operation cannot be performed in this event handler.

Is there something I need to do to commit the grid or some such thing before trying to clear the rows?  I tried invoking the EndEdit method in the RowValidated event, but that didn't help.

Thanks,

 Private Sub FillGrid()
        Try

            Me.dgvMKL.Rows.Clear()

            Dim dc As dcKittingdc = New dcKittingdc(Me._ConnString)

            Dim MKLRecs As IQueryable(Of MKL) = From i In dc.MKLs
                                                Where i.Job_Number = Me.tJob.Text _
                                                AndAlso i.SS_Number = Me.tSS.Text _
                                                AndAlso i.Install = Me.cbInstall.Text
                                                Select i

            For Each MKLRec As MKL In MKLRecs
                Me.dgvMKL.Rows.Add(MKLRec.Job_Number, _
                                   MKLRec.SS_Number, _
                                   MKLRec.Install, _
                                   MKLRec.Real_Part_Number, _
                                   MKLRec.Qty.ToString(), _
                                   MKLRec.uom, _
                                   MKLRec.Active, _
                                   MKLRec.User, _
                                   MKLRec.DateTime.ToString(), _
                                   MKLRec.Top_Collector, _
                                   MKLRec.MKL_Id.ToString())
            Next
        Catch ex As Exception
            Throw New Exception("At FillGrid/frmEditMKL: " + ex.Message)
        End Try
    End Sub

Open in new window

0
Comment
Question by:g_johnson
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 39768212
have you tried dgvMKL.DataSource = Nothing
0
 
LVL 4

Author Comment

by:g_johnson
ID: 39768502
The grid is never bound, but I tried this anyhow.  No luck.
0
 
LVL 4

Accepted Solution

by:
g_johnson earned 0 total points
ID: 39769229
I solved this using information I found here:

http://stackoverflow.com/questions/4960232/operation-cannot-be-performed-in-this-event-handler


I used a timer.
0
 
LVL 4

Author Closing Comment

by:g_johnson
ID: 39778779
Solves the problem, no other viable solutions offered
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

732 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question