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 Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

Reference

CalcConvert Class
CalcConvert Members