Determines whether the specified value can be converted to a double-precision, floating point value and is between the minimum and maximum allowed values.

Syntax

Visual Basic (Declaration)
Public Overrides Function IsValid( _ ByVal value As Object _ ) As Boolean

Visual Basic (Usage)	Copy Code
Dim instance As NumberCellType Dim value As Object Dim value As Boolean value = instance.IsValid(value)

C#
public override bool IsValid( object value )

Parameters

value: Value to validate

Return Value

Boolean: true if the value can be converted to a double-precision, floating-point value and is between the minimum and maximum value; false otherwise

Remarks

The valid range of values is defined by the MinimumValue and MaximumValue properties.

Example

This example shows the use of the IsValid method for a date-time formatted numeric cell type, but it can be used for other cell types as well.

C#	Copy Code
FarPoint.Win.Spread.CellType.DateTimeCellType dt = new FarPoint.Win.Spread.CellType.DateTimeCellType(); bool b; dt.DateTimeFormat = FarPoint.Win.Spread.CellType.DateTimeFormat.ShortDate; dt.MaximumDate = new System.DateTime(2010, 12, 31); dt.MinimumDate = new System.DateTime(1990, 1, 1); fpSpread1.ActiveSheet.Cells[0, 0].CellType = dt; fpSpread1.ActiveSheet.Cells[0, 0].Value = new System.DateTime(2011, 9, 12); fpSpread1.ActiveSheet.Cells[1, 0].CellType = dt; fpSpread1.ActiveSheet.Cells[1, 0].Value = new System.DateTime(1989, 9, 12); b = dt.IsValid(fpSpread1.ActiveSheet.Cells[0, 0].Value); listBox1.Items.Add(b.ToString());

Copy Code

FarPoint.Win.Spread.CellType.DateTimeCellType dt = new FarPoint.Win.Spread.CellType.DateTimeCellType();
bool b;
dt.DateTimeFormat = FarPoint.Win.Spread.CellType.DateTimeFormat.ShortDate;
dt.MaximumDate = new System.DateTime(2010, 12, 31);
dt.MinimumDate = new System.DateTime(1990, 1, 1);
fpSpread1.ActiveSheet.Cells[0, 0].CellType = dt;
fpSpread1.ActiveSheet.Cells[0, 0].Value = new System.DateTime(2011, 9, 12);
fpSpread1.ActiveSheet.Cells[1, 0].CellType = dt;
fpSpread1.ActiveSheet.Cells[1, 0].Value = new System.DateTime(1989, 9, 12);
b = dt.IsValid(fpSpread1.ActiveSheet.Cells[0, 0].Value);
listBox1.Items.Add(b.ToString());

Visual Basic	Copy Code
Dim dt As New FarPoint.Win.Spread.CellType.DateTimeCellType() Dim b As Boolean dt.DateTimeFormat = FarPoint.Win.Spread.CellType.DateTimeFormat.ShortDate dt.MaximumDate = New System.DateTime(2010, 12, 31) dt.MinimumDate = New System.DateTime(1990, 1, 1) FpSpread1.ActiveSheet.Cells(0, 0).CellType = dt FpSpread1.ActiveSheet.Cells(0, 0).Value = New System.DateTime(2011, 9, 12) FpSpread1.ActiveSheet.Cells(1, 0).CellType = dt FpSpread1.ActiveSheet.Cells(1, 0).Value = New System.DateTime(1989, 9, 12) b = dt.IsValid(FpSpread1.ActiveSheet.Cells(0, 0).Value) ListBox1.Items.Add(b.ToString())

Visual Basic

Copy Code

Dim dt As New FarPoint.Win.Spread.CellType.DateTimeCellType()
Dim b As Boolean
dt.DateTimeFormat = FarPoint.Win.Spread.CellType.DateTimeFormat.ShortDate
dt.MaximumDate = New System.DateTime(2010, 12, 31)
dt.MinimumDate = New System.DateTime(1990, 1, 1)
FpSpread1.ActiveSheet.Cells(0, 0).CellType = dt
FpSpread1.ActiveSheet.Cells(0, 0).Value = New System.DateTime(2011, 9, 12)
FpSpread1.ActiveSheet.Cells(1, 0).CellType = dt
FpSpread1.ActiveSheet.Cells(1, 0).Value = New System.DateTime(1989, 9, 12)
b = dt.IsValid(FpSpread1.ActiveSheet.Cells(0, 0).Value)
ListBox1.Items.Add(b.ToString())

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2