DataGridView read only cells

Question

I have a binded DataGridView that contains a large amount of data. The problem is that some cells has to be ReadOnly and also when the user navigates with TAB or ENTER betwe

Answer 1

You can do this using the BeginningEdit event to check if the check if the cell meets a condition and cancel the operation if not:

In the example below, if the cell already contains a value it will cancel the operation, deeming it as read only.

xaml:

<DataGrid BeginningEdit="DataGrid_BeginningEdit" ItemsSource="{Binding Example, Mode=TwoWay}"/>

c#:

private void DataGrid_BeginningEdit(object sender, DataGridBeginningEditEventArgs e)
{
    string content = (e.EditingEventArgs.Source as TextBlock).Text;

    if (!(String.IsNullOrEmpty(content)))
        e.Cancel = true;
}

Answer 2

Try to make the column rather than individual cells readonly before binding the data:

this.dgrid.Columns["colName"].ReadOnly = true;

If you need to do for individual cells within the column, then you will have to loop and set them like this:

this.dgridvwMain.Rows[index].Cells["colName"].ReadOnly = true;

Answer 3

You can use CellBeginEdit event and set e.Cancel = True when you need disable the cell.

Private Sub DataGridView_CellBeginEdit(sender As System.Object, e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles DataGridViewMsg.CellBeginEdit
    If DataGridViewMsg.Rows(e.RowIndex).Cells("disable").Value = "Y" Then
        e.Cancel = True
    End If
End Sub

Answer 4

Once the column is read only (see Rashmi's response) you can handle this event...

private void dataGridView1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == (char)Keys.Tab)
    {
        Boolean readOnly = (sender as DataGridView).SelectedCells[0].ReadOnly;

        return;
    }

}

Which will get the next cell's read only property.

Thanks

Answer 5

this.dataGridViewEmpList.EditMode = DataGridViewEditMode.EditProgrammatically;

Answer 6

There's a very nice sample here:
http://blogs.msdn.com/netcfteam/archive/2006/04/25/583542.aspx

You just need to override Paint() , I've used this on compact framework to change the backcolor depending on the cell contents so on the same note you shouldn't have any problem to set them read only.