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NullColor Property

FarPoint.Win Assembly > FarPoint.Win Namespace > SuperEditBase Class : NullColor Property
Gets or sets the background color displayed when the control contains the null value.
Public Overridable Property NullColor As Color
Dim instance As SuperEditBase
Dim value As Color
instance.NullColor = value
value = instance.NullColor
public virtual Color NullColor {get; set;}

Property Value

Color object containing the background color of the edit control

This property indicates to the user that the control contains the null value. The background color of the control changes to the specified color when the control loses the focus.

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:

This property is available from the SuperEditBase class.

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

You can return whether a control contains the null value by calling the IsNull method.

private void Form1_Load(object sender, System.EventArgs e)
   control.NullColor = Color.Coral;
   control.AllowNull = true;
   control.CausesValidation = true;
   control.Text = "";

private void button1_Click(object sender, System.EventArgs e)
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
   control.NullColor = Color.Coral
   control.AllowNull = True
   control.CausesValidation = True
   control.Text = ""
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
End Sub
See Also


SuperEditBase Class
SuperEditBase Members
AllowNull Property
IsNull Method
SetNull Method