DatagridViewColumn.ReadOnly throws System.ArgumentOutOfRangeException

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  Hi,

  Welcome to MSDN.

  I created a simple sample to test with the following code:

  Public Class Form1
      Dim dt As New DataTable
      Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
          With dt
              With .Columns
                  .Add("col1")
                  .Add("col2")
                  .Add("col3")
              End With
              With .Rows
                  .Add({0, 2, 0})
                  .Add({0, 0, 0})
                  .Add({1, 0, 0})
                  .Add({0, 0, 0})
                  .Add({0, 0, 0})
              End With
          End With
          DataGridView1.DataSource = dt
      End Sub
  
      Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
          Try
              For Each c As DataGridViewColumn In DataGridView1.Columns
                  c.ReadOnly = Not c.ReadOnly
              Next
              MsgBox("done")
          Catch ex As Exception
              MsgBox(ex.ToString())
          End Try
      End Sub
  End Class

  I could not reproduce this issue in my side, in order to make this issue clear, you could share more information with us.

  If you add a line as following code, what will it show?

  For Each c As DataGridViewColumn In DataGridView1.Columns
                  MsgBox(c.Index & "+" & c.Name)
                  c.ReadOnly = Not c.ReadOnly
              Next

  You could create a simple sample which has the same issue and share it with us by uploading it to skydrive and sharing the link with us.

  Regards.

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  Monday, February 10, 2014 2:52 AM
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  Hi,

  Thanks for reply. I try to reproduce the issue in a new project, but in new project the exception not thrown. 

  I forgot to say one important thing: this is not the original DataGridView control, this is a third party component DotNetBar's DataGridViewX control, with DataGridViewDoubleInput column (but these controls inherits from the original controls and the ReadOnly property was not rewritten). 

  I thinking that the issue thrown with original control, because it is similar with this post: ArgumentOutOfRangeException (possible that I'm wrong).

  The messagebox line in your example executed well, it writes the index and name to messagebox with all column. (When only the Readonly part is in Try...Catch)

  Unfortunately I cannot upload the entire project, because it is very huge with more dll-s and db connection, but i found a workaround to solve the problem (without Try..Catch :) )

  I need to place this code before For, and the exception not thown anymore:

              dgvList.ReadOnly = False
              dgvList.ReadOnly = True

  One problem, that the columns readonly property will not set great in this case, so i need to use Try..Catch, therefore not affect the program logic.

  ---

  SZL

  Monday, February 10, 2014 8:06 AM
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  Hi,

  Glad to receive your reply.

  But I am afraid that issues related to third-party are not supported in these forums.

  I would suggest you consider posting this issue in the website of the publisher of that control.

  In addition, if you change that control to original, will it has the same issue?

  If so, you could share that sample with us, I will test it in my side.

  Thanks for your understanding.

  Regards.

  ---

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  Monday, February 10, 2014 8:35 AM
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  I forgot to say one important thing: this is not the original DataGridView control, this is a third party component DotNetBar's DataGridViewX control, with DataGridViewDoubleInput column (but these controls inherits from the original controls and the ReadOnly property was not rewritten). 

  
  

  Better to contact the vendor of that 3th party datagridview, now it becomes guessing.

  ---

  Success
  Cor

  • Proposed as answer by Carl Cai Tuesday, February 11, 2014 1:54 AM
  • Marked as answer by Just Karl Sunday, February 23, 2014 3:40 AM

  Monday, February 10, 2014 8:37 AM
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  Hi!
  
  Oh sorry, i am new here. :)
  I try to change the component to original, but the control and the columns are referenced many place in my code and i cannot change it easily. 
  
  When i can make a sample with the issue i will upload it to skydrive and share it here. I will contact also with the authors.

  Thanks for help!
  

  
  

  ---

  SZL

  Monday, February 10, 2014 9:53 AM
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  I try to change the component to original, but the control and the columns are referenced many place in my code and i cannot change it easily. 

  Hi,

  I have moved this thread here since this issue is related to third-party.

  If you still have the same issue with original DataGridView control, you could post a new thread in vb.net forum.

  We will focus on that new thread to help you.

  Thanks for your understanding.

  Regards.

  ---

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  Tuesday, February 11, 2014 1:57 AM
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  Hi,

  Ok, thank you!

  ---

  SZL

  Tuesday, February 11, 2014 7:48 AM