GetCustomFunction Method (SheetView)

Gets a user-defined custom function (FunctionInfo object) from the model for this sheet.

Syntax

Visual Basic
C#

'Declaration
 
Public Function GetCustomFunction( _
   ByVal name As String _
) As FunctionInfo

'Usage
 
Dim instance As SheetView
Dim name As String
Dim value As FunctionInfo
 
value = instance.GetCustomFunction(name)

public FunctionInfo GetCustomFunction( 
   string name
)

Parameters

name: Name of custom function to get

Return Value

FunctionInfo object containing the specified name of the user-defined custom function, or null if none exists

Remarks

For more information on using custom functions in formulas, refer to the Formula Reference.

Example

This example illustrates the use of this member by returning a user-defined custom function (Function object) from the model.

public class CubeFunctionInfo : FarPoint.CalcEngine.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 = FarPoint.CalcEngine.CalcConvert.ToDouble(args[0]);
        return num * num * num;
      }
    }

fpSpread1.AddCustomFunction(new CubeFunctionInfo());
fpSpread1.ActiveSheet.SetFormula(1, 1, "CUBE(4)");

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

FpSpread1.ActiveSheet.AddCustomFunction(New CubeFunctionInfo)
FpSpread1.ActiveSheet.SetFormula(1, 1, "CUBE(4)")

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

SheetView Class
SheetView Members
AddCustomFunction Method

User-Task Documentation

Creating and Using Custom Functions