Spread Windows Forms 9.0 Product Documentation
ToDouble Method
Example 


Value to convert
Converts the specified value to a double-precision, floating-point number.
Syntax
'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
ExceptionDescription
System.InvalidCastExceptionValue 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;
        }
    }
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

See Also

Reference

CalcConvert Class
CalcConvert Members

 

 


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