SetNull Method

Sets the contents of the control to the null value.

Syntax

Visual Basic
C#

'Declaration
 
Public Overridable Sub SetNull()

'Usage
 
Dim instance As SuperEditBase
 
instance.SetNull()

public virtual void SetNull()

Remarks

When the AllowNull property is set to true, the control accepts null values, and the user can provide a null value in the following ways:

Press F2.
Delete the contents of the control.
Call the SetNull method method.
Call the ClearAll method.
Select the contents of the control and call the Clear method.

The AllowNull property must be set to true for the SetNull method to work correctly.

Call the IsNull method to determine whether a control contains the null value. Set the NullColor property to specify the background color the control displays when it contains the null value.

Example

control.AllowNull = true;
control.SetNull();

Visual Basic

control.AllowNull = True
control.SetNull()

Requirements

Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

Reference

SuperEditBase Class
SuperEditBase Members
AllowNull Property
IsNull Method
NullColor Property
Text Property