Ad:

VB.NET Discussion Thread
Marked Solved
Views: 6084

Dec 17th, 2008

Checkbox in Datagridview

Expand Post »

Hi friends

I am working in vb.net ,there is i have a form in which i have a datagridview,& a column of checkbox in tat datagridview,when this datagridview becomes load, that checkes theb employee is present or absent if present so the check box of that perticular row must be checked true else checked false,for this i did

dim chk as checkbox

if condition that
chk.checked=true
else
chk.checked=false
end if
but it giving me a error message "object refrence not set"

please help me to solve this problem

Similar Threads

checkbox in datagridview c# in C#
how to trap the values of a particular row in datagridview in C#
Checkbox in DataGridView in VB.NET
Checkbox Value in DataGridView in VB.NET

manoj_582033

Reputation Points: 10

Solved Threads: 2

Light Poster

Offline

39 posts
since Nov 2008

Permalink

Dec 17th, 2008

Re: Checkbox in Datagridview

Are you adding checkboxes to datagrid at runtime?

VB.NET Syntax (Toggle Plain Text)
Dim chk As New DataGridViewCheckBoxCell
 
If condition Then
  chk.Value = True
Else
  chk.Value = False
End If
' Add checkbox control to datagrid
DataGridView1.Item(0, 0) = chk
Dim chk As New DataGridViewCheckBoxCell

If condition Then
  chk.Value = True
Else
  chk.Value = False
End If
' Add checkbox control to datagrid
DataGridView1.Item(0, 0) = chk

If not, then

VB.NET Syntax (Toggle Plain Text)
If condition Then
  DataGridView1.Item(0, 0).Value = True
Else
  DataGridView1.Item(0, 0).Value = False
End If
If condition Then
  DataGridView1.Item(0, 0).Value = True
Else
  DataGridView1.Item(0, 0).Value = False
End If

"object reference not set"-error comes from declaring an object dim chk as checkbox but not creating the instance, like dim chk as New checkbox

Teme64

Reputation Points: 218

Solved Threads: 201

Veteran Poster

Offline

1,024 posts
since Aug 2008

Permalink

Oct 19th, 2009

Re: Checkbox in Datagridview

How to select AllCheckBoxes in DataGridView1 in.Net 2005

Esrinivas

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

1 posts
since Oct 2009

Permalink

Oct 19th, 2009

Re: Checkbox in Datagridview

You should start your own thread for new questions. But to quickly answer your question, you want to work with the underlying datasource that is connected to the datagridview. For instance if it is a datatable that is connected, you want to set the table with the boolean column to true

TomW

Reputation Points: 84

Solved Threads: 48

Posting Whiz

Offline

342 posts
since Sep 2009

This thread is solved

Either the thread starter or a moderator has marked this thread as solved. You can most likely trust the responses and answers given. There is most likely no reason for any further responses to be posted here. If you have a related question, please start a new thread in this forum instead.

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in VB.NET Forum Timeline: status strip

Next Thread in VB.NET Forum Timeline: Date/Time Stamped and Numbered filenames when saving to jpeg?

DaniWeb Message

Cancel Changes

User Name
Password