NullIsValid Property (RangeValidator)

Gets or sets a value that indicates whether the validation always succeeds when the specified value is a null reference (Nothing in Visual Basic).

Syntax

Visual Basic
C#

'Declaration
 
Public Property NullIsValid As Boolean

'Usage
 
Dim instance As RangeValidator
Dim value As Boolean
 
instance.NullIsValid = value
 
value = instance.NullIsValid

public bool NullIsValid {get; set;}

Property Value

true if the validation always succeeds when the specified value is a null reference (Nothing in Visual Basic); otherwise, false. The default is true.

Remarks

If the cell value is a null reference (Nothing in Visual Basic), you can determine whether the validation always succeeds.

Example

This example creates a range validator.

FarPoint.Win.Spread.CellStyleNotify stylenotify = new FarPoint.Win.Spread.CellStyleNotify();
stylenotify.InvalidCellStyle.BackColor = Color.Aquamarine;
FarPoint.Win.Spread.RangeValidator rvalid = new FarPoint.Win.Spread.RangeValidator();
rvalid.MaxValue = 10;
rvalid.MinValue = 0;
rvalid.NullIsValid = true;
rvalid.RequiredType = typeof(int);
rvalid.Actions.Add(stylenotify);
fpSpread1.Sheets[0].AddValidators(new FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), rvalid);

Visual Basic

Dim stylenotify As New FarPoint.Win.Spread.CellStyleNotify()
stylenotify.InvalidCellStyle.BackColor = Color.Aquamarine
Dim rvalid As New FarPoint.Win.Spread.RangeValidator()
rvalid.MaxValue = 10
rvalid.MinValue = 0
rvalid.NullIsValid = True
rvalid.RequiredType = GetType(Integer)
rvalid.Actions.Add(stylenotify)
FpSpread1.Sheets(0).AddValidators(New FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), rvalid)

Reference

RangeValidator Class
RangeValidator Members