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

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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