How To Prevent Datagrid Row Deletion

[Anupbala]

I am using a windows form datagrid and a datatable is used as the datasource.I want to prevent deletion of the first row.I tried with datatable's rowdeleting event.But i was not able to reject the changes.Can any one help.I'm pasting the code that i tried Private Sub DataTable_RowDeleting(ByVal sender As System.Object, ByVal e As System.Data.DataRowChangeEventArgs) If e.Action = DataRowAction.Delete Then If dgGrid.CurrentCell.RowNumber = 0 Then e.Row.RejectChanges() CType(sender, DataTable).AcceptChanges() End If Else e.Row.AcceptChanges() End If End Sub Anup Balakrishnan

[Glaxalg]

In order to solve the problem I had to ctreate my own DataGrid:

public class CustomDataGrid : System.Windows.Forms.DataGrid {

    public CustomDataGrid() {}

    public bool bAllowDeleteRows {
        get { return m\_bAllowDeleteRows; }
        set { m\_bAllowDeleteRows = value; }
    }

    public override bool PreProcessMessage(ref System.Windows.Forms.Message msg) {
        
        Keys oKeyCode = (Keys)(msg.WParam.ToInt32() & (int)Keys.KeyCode);
        if ((oKeyCode == Keys.Delete) & (msg.Msg == 0x100) & !m\_bAllowDeleteRows){
            MessageBox.Show ( "Rows deletion is not allowed" );
            return true;
        }
        return base.PreProcessMessage (ref msg);
    }

    protected override bool ProcessDialogKey(Keys keyData) {
        if (keyData == Keys.Delete && this.IsSelected ( this.CurrentRowIndex ) && !m\_bAllowDeleteRows ){ 
            MessageBox.Show ( "Rows deletion is not allowed" );
            return true;
        }            
        return base.ProcessDialogKey (keyData);
    }

    private bool m\_bAllowDeleteRows = true;        

Overitten functions prevent deleting row when a user click on delete.

[Anupbala]

Can you help me how this can be impleted in my project.This is very urgent for me.Waiting for response.

[Glaxalg]

I didn't see your code but you need to do the following: 1) Create a new custom DataGrid using the code from the previous message 2) Change all instances of DataGrid in your code to a new CustomDataGrid 3) Set bAllowDeleteRows property of a CustomDataGrid to true That's all you need to do...