Column Editing Events

True DBGrid provides full control over the cell editing process with the following events, listed in the order in which they occur during a successful editing attempt:

BeforeColEdit	Fired upon an attempt to edit column data.
ColEdit	Fired when the current cell enters edit mode.
AfterColEdit	Fired after column data is edited.

Use the BeforeColEdit event to control the editability of cells on a per-cell basis, or to translate the initial keystroke into a default value.

The ColEdit event signals that the current cell has entered edit mode; the AfterColEdit event signals that edit mode was terminated. Use these two events to provide additional feedback while editing is in progress:

· Visual Basic

Private Sub C1TrueDBGrid1_ColEdit(ByVal sender As Object, ByVal e As C1.Win.C1TrueDBGrid.ColEventArgs) Handles C1TrueDBGrid1.ColEdit

Select Case e.Columns.DataColumn.Caption

Case "Code"

Me.Label1.Text = "Enter 4-digit company code"

Case "Description"

Me.Label1.Text = "Enter full company name"

End Select

End Sub

Private Sub C1TrueDBGrid1_AfterColEdit (ByVal sender As Object, ByVal e As C1.Win.C1TrueDBGrid.ColEventArgs) Handles C1TrueDBGrid1.AfterColEdit

' Clear editing instructions.

Me.Label1.Text = ""

End Sub

· C#

private void C1trueDBGrid1_ColEdit(object sender, C1.Win.C1TrueDBGrid.ColEventArgs e)

{

switch(e.Columns.DataColumn.Caption)

{

Case "Code":

this.Label1.Text = "Enter 4-digit company code";

break;

Case "Description";

this.Label1.Text = "Enter full company name";

break;

}

private void C1TrueDBGrid1_AfterColEdit(object sender, C1.Win.C1TrueDBGrid.ColEventArgs e)

}

// Clear editing instructions.

this.Label1.Text = "";

}

· Delphi

procedure TWinForm.C1TrueDBGrid1_ColEdit(sender: System.Object; e: C1.Win.C1TrueDBGrid.ColEventArgs);

var S: string;

begin

S := Self.C1TrueDBGrid1.Columns[e.ColIndex].Caption;

if (S = 'Code') then;

Self.Label1.Text := 'Enter 4-digit company code';

else if (S = 'Description') then

Self.Label1.Text := 'Enter full company name';

end;

procedure TwinForm.C1TrueDBGrid1_AfterColEdit(sender: System.Object; e: C1.Win.C1TrueDBGrid.ColEventArgs);

begin

// Clear editing instructions.

Self.Label1.Text := '';

end;