Question : how to add a column checkbox to Telerik RadGrid to select/deselect all the checkboxes from each item?

how to add a column checkbox to Telerik RadGrid to select/deselect all the checkboxes from each item?
I use Visual Studio 2010, with C# and the latest Telerik RadGrid control

Thanks !

Answer : how to add a column checkbox to Telerik RadGrid to select/deselect all the checkboxes from each item?

Hi,
  it is best practice to use "using" to create,show and destroy the modal forms. you should check for whether user is changed something and clicked accept button (which a button sets DialogResult = DialogResult.OK).if he click "cancel" button (which a button sets DialogResult = DialogResult.Cancel), you should not do update cell value. have attached sample.

ViewAgenciesByJobsForm.ShowDialog(this)

sets current form as parent form. 
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if (e.ColumnIndex == 0 && e.RowIndex > 0)
{
  using  (frmLookupJob ViewAgenciesByJobsForm =
                       ViewAgenciesByJobsForm = new frmLookupJob())
  {
     if(ViewAgenciesByJobsForm.ShowDialog(this) == DialogResult.OK))
         dgvViewJobLinker[1,dgvViewJobLinker.CurrentCell.RowIndex].Value                   = ViewAgenciesByJobsForm.CellValue;

   }
}


in frmLookupJob , it will something like:

(1) btnOk click event :
    CellValue = "my new Value"
    DialogResult   =DialogResut.OK;

(2) btnCancel click event :
    DialogResult   =DialogResut.Cancel;
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