Spread for ASP.NET 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 7, Windows 8, Windows 10, Windows Vista, Windows Server 2003, Windows Server 2008, Windows Server 2012, Windows XP Professional

See Also

Reference

CalcConvert Class
CalcConvert Members

 

 


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