Solved

system.argumentexception:DataGridViewcombobox cell value is not valid

Posted on 2009-04-05
17
3,715 Views
Last Modified: 2012-05-06
i am trying to assign the value of a particular cell from the respective column in the database ...here is the code i tried.....

 For Each row As DataGridViewRow In Me.DataGridView1.Rows
           
            Dim CTRcell As DataGridViewComboBoxCell = DirectCast(row.Cells(0), DataGridViewComboBoxCell)
            CTRcell.Value = centeridandname
           
        Next

i am getting an exception system.argumentexception:DataGridViewcombobox cell value is not valid.

Please find the exception details attached.
Untitled.jpg
0
Comment
Question by:yuvaratna
  • 9
  • 8
17 Comments
 
LVL 48

Expert Comment

by:jpaulino
ID: 24072895
Do you have the combobox in the 1st column ?
Try to change to :

For Each row As DataGridViewRow In Me.DataGridView1.Rows

        If not row.IsNewRow Then

            Dim CTRcell As DataGridViewComboBoxCell = DirectCast(row.Cells(0), DataGridViewComboBoxCell)

            CTRcell.Value = centeridandname

        End If

  Next

Open in new window

0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24072955
Sorry wrong answer :(
The problem is not the new row, for that message, but the assing of the value. If you want to select one value you can do this way:

        For Each row As DataGridViewRow In Me.DataGridView1.Rows

            If Not row.IsNewRow Then

                row.Cells(0).Value = "1"

            End If

        Next
 

        ' Where "1" is the name of the item to select 

Open in new window

0
 

Author Comment

by:yuvaratna
ID: 24073008
Hi Ipaulino,I was waiting for you, Thanks for your reply, i tried the above code...but  "row.IsNewRow" is returning true....if i commented the if not row is new row line, it is returning the same exception "system.argumentexception:DataGridViewcombobox cell value is not valid."
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24073018
Check my second comment :)
I have understood wrongly your problem.
0
 

Author Comment

by:yuvaratna
ID: 24073044
heer is the code i have

For Each row As DataGridViewRow In Me.DataGridView1.Rows
           
             
                row.Cells(0).Value =centeridandname
         
        Next

in this case it is returning the same exception....


0
 

Author Comment

by:yuvaratna
ID: 24073051
when i tried


 For Each row As DataGridViewRow In Me.DataGridView1.Rows
            If Not row.IsNewRow Then
             
                row.Cells(0).Value = ObjTA.centeridandname
            End If
        Next


The execution is not going to the row.cell(0).value line because, the "row.isnewrow" is returning true...
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24073056
What is centeridandname variable ? You must specify a valid STRING that are in the itens of the combobox
You could try
row.Cells(0).Value =centeridandname.ToString()
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24073067
Ok, it's a new row then remove that line.
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:yuvaratna
ID: 24073083
nope! that is not working out!.. it is returning the same error
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24073089
Can you show a picture of what you have ?
centeridandname is a string variable and exists in the datagridviewcombobox ?
0
 

Author Comment

by:yuvaratna
ID: 24073130
the canterid and name is returning "0000-abc" , which exists in the combobox dataset...
0
 
LVL 48

Accepted Solution

by:
jpaulino earned 500 total points
ID: 24073317
Humm ok, you have a datasource for the combobox!
You can still use the code I have showed you but you need to cancel the error.  On the DataError event you can clear the error this way:
(this was documented as a datagridview problem in VS2005 ... didn't knew that still exists in VS2008)

    Private Sub DataGridView1_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles DataGridView1.DataError

        If e.Context = DataGridViewDataErrorContexts.Formatting Or e.Context = DataGridViewDataErrorContexts.PreferredSize Then

            e.ThrowException = False

        End If

    End Sub

Open in new window

0
 

Author Comment

by:yuvaratna
ID: 24073331
k ipaulo, thanks a lot, Give a min, i l chek on this....
0
 

Author Comment

by:yuvaratna
ID: 24073352
i have this right now

For Each row As DataGridViewRow In Me.DataGridView1.Rows
         
            row.Cells(0).Value = ObjTA.centeridandname.ToString()
           
        Next

 Private Sub DataGridView1_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles DataGridView1.DataError
        If e.Context = DataGridViewDataErrorContexts.Formatting Or e.Context = DataGridViewDataErrorContexts.PreferredSize Then
            e.ThrowException = False
        End If
    End Sub



the error message is handled....But it is looping in the datagridview1_error event ...and still not displaying the value in the selected combobox...
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24073375
Once again please CHECK if the values is available in the datasource and if the COLUMN is the index 0 (1st column)
Here's an working example if you want to try:

Public Class Form1
 

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 

        ' Creates a datatable

        Dim dt As New DataTable

        dt.Columns.Add("id", GetType(Integer)).AutoIncrement = True

        dt.Columns.Add("item", GetType(String))
 

        ' Adds some values

        For x As Int16 = 0 To 10

            Dim dr As DataRow = dt.NewRow

            dr("item") = "Item " & x.ToString

            dt.Rows.Add(dr)

        Next
 

        ' Create a new combo and adds it to the grid

        Dim combo As New DataGridViewComboBoxColumn

        combo.DataSource = dt.DefaultView

        combo.DisplayMember = "item"

        combo.ValueMember = "id"
 

        Me.DataGridView1.Columns.Add(combo)
 

    End Sub
 

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        For Each row As DataGridViewRow In Me.DataGridView1.Rows

            row.Cells(0).Value = "Item 3"

        Next

    End Sub
 

    Private Sub DataGridView1_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles DataGridView1.DataError

        If e.Context = DataGridViewDataErrorContexts.Formatting Or e.Context = DataGridViewDataErrorContexts.PreferredSize Then

            e.ThrowException = False

        End If

    End Sub
 

End Class

Open in new window

0
 

Author Closing Comment

by:yuvaratna
ID: 31566814
Thanks a lot ipaulino...I really hard tough time with this datagridview, Which very few of them are familiar with, U Helped me in many instances.....
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24075033
Glad I could help!
jpaulino
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

This article explains how to create and use a custom WaterMark textbox class.  The custom WaterMark textbox class allows you to set the WaterMark Background Color and WaterMark text at design time.   IMAGE OF WATERMARKS STEPS Create VB …
Parsing a CSV file is a task that we are confronted with regularly, and although there are a vast number of means to do this, as a newbie, the field can be confusing and the tools can seem complex. A simple solution to parsing a customized CSV fi…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

862 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

Need Help in Real-Time?

Connect with top rated Experts

29 Experts available now in Live!

Get 1:1 Help Now