EnterNullValue Method

DataGridColumnStyle.EnterNullValue Method ()


Enters a DBNull.Value into the column.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

protected internal virtual void EnterNullValue()

This method is called when the user presses ALT+0 to allow a column to enter the appropriate null value. For example, when called on a DataGridTextBoxColumn, the appropriate NullText value is inserted into the column.

The EnterNullValue has no default behavior. When inheriting from DataGridColumnStyle, override the method to enter null in a column.

The following code example shows a possible override of the EnterNullValue method.

Overrides Protected Sub EnterNullValue()
   ' Enter the NullText value into a hosted TextBox control.
   Me.TextBox.Text = Me.NullText
End Sub

.NET Framework
Available since 1.1
Return to top
© 2015 Microsoft