ToDouble Method

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

Syntax

Visual Basic
C#

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

'Usage
 
Dim value As Object
Dim value As Double
 
value = CalcConvert.ToDouble(value)

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.

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

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 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8

Reference

CalcConvert Class
CalcConvert Members