Converts the specified value to a double-precision, floating-point number.

Syntax

Visual Basic (Declaration)
Public Shared Function ToDouble( _ ByVal value As Object _ ) As Double

Visual Basic (Usage)	Copy Code
Dim value As Object Dim value As Double value = CalcConvert.ToDouble(value)

C#
public static double ToDouble( object value )

Parameters

value: Value to convert

Return Value

Double-precision, floating point number equivalent to the specified value

Exceptions

Exception	Description
System.InvalidCastException	Value cannot be converted.

Example

This example converts the value to be double.

C#	Copy Code
public class CubeFunctionInfo : FunctionInfo { public override string Name { get { return "CUBE"; } } public override int MinArgs { get { return 1; } } public override int MaxArgs { get { return 1; } } public override object Evaluate (object[] args) { double num = CalcConvert.ToDouble(args[0]); return num * num * num; } }

Copy Code

public class CubeFunctionInfo : FunctionInfo 
    {
        public override string Name { get { return "CUBE"; } }
        public override int MinArgs { get { return 1; } }
        public override int MaxArgs { get { return 1; } }
        public override object Evaluate (object[] args)
        {
            double num = CalcConvert.ToDouble(args[0]);
            return num * num * num;
        }
    }

Visual Basic	Copy Code
Public Class CubeFunctionInfo Inherits FarPoint.CalcEngine.FunctionInfo Public Overrides ReadOnly Property Name() As String Get Return "CUBE" End Get End Property Public Overrides ReadOnly Property MinArgs() As Integer Get Return 1 End Get End Property Public Overrides ReadOnly Property MaxArgs() As Integer Get Return 1 End Get End Property Public Overrides Function Evaluate(ByVal args() As Object) As Object Dim num As Double = FarPoint.CalcEngine.CalcConvert.ToDouble(args(0)) Return num * num * num End Function End Class

Visual Basic

Copy Code

Public Class CubeFunctionInfo
   Inherits FarPoint.CalcEngine.FunctionInfo

   Public Overrides ReadOnly Property Name() As String
   Get
   Return "CUBE"
   End Get
   End Property

   Public Overrides ReadOnly Property MinArgs() As Integer
   Get
   Return 1
   End Get
   End Property

   Public Overrides ReadOnly Property MaxArgs() As Integer
   Get
   Return 1
   End Get
   End Property

   Public Overrides Function Evaluate(ByVal args() As Object) As Object
   Dim num As Double = FarPoint.CalcEngine.CalcConvert.ToDouble(args(0))
   Return num * num * num
   End Function
End Class

Requirements

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family