GetCustomFunctionEnumerator Method (SheetView)

In This Topic

Gets an IEnumerator for this sheet that enumerates through the names of the user-defined custom functions (FunctionInfo objects) in the model.

Syntax

Visual Basic
C#

'Declaration
 
Public Function GetCustomFunctionEnumerator() As IEnumerator

'Usage
 
Dim instance As SheetView
Dim value As IEnumerator
 
value = instance.GetCustomFunctionEnumerator()

public IEnumerator GetCustomFunctionEnumerator()

Return Value

IEnumerator object containing the enumerator for the custom function

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 an IEnumerator that enumerates through the names of the user-defined custom functions (Function objects) in the sheet.

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;
      }
    }

public class MultiFunc : FarPoint.CalcEngine.FunctionInfo
    {
      public override string Name { get { return "MULTI"; } }
      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;
      }
    }

System.Collections.IEnumerator se;
fpSpread1.ActiveSheet.AddCustomFunction(new CubeFunctionInfo());
fpSpread1.ActiveSheet.AddCustomFunction(new MultiFunc());
fpSpread1.ActiveSheet.SetFormula(1, 1, "CUBE(4)");
fpSpread1.ActiveSheet.SetFormula(2, 2, "MULTI(10)");
se = fpSpread1.ActiveSheet.GetCustomFunctionEnumerator();
listBox1.Items.AddRange(new Object[] {se.MoveNext().ToString(), se.Current.ToString(), se.MoveNext().ToString(), se.Current.ToString()});

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

Public Class MultiFunc
Inherits FarPoint.CalcEngine.FunctionInfo

Public Overrides ReadOnly Property Name() As String
   Get
   Return "MULTI"
   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
   End Function
End Class

Dim se As System.Collections.IEnumerator
FpSpread1.ActiveSheet.AddCustomFunction(New CubeFunctionInfo())
FpSpread1.ActiveSheet.AddCustomFunction(New MultiFunc())
FpSpread1.ActiveSheet.SetFormula(1, 1, "CUBE(4)")
FpSpread1.ActiveSheet.SetFormula(2, 2, "MULTI(10)")
se = FpSpread1.ActiveSheet.GetCustomFunctionEnumerator()
ListBox1.Items.AddRange(New Object() {se.MoveNext().ToString(), se.Current().ToString(), se.MoveNext().ToString(), se.Current().ToString()})

Reference

SheetView Class
SheetView Members

User-Task Documentation

Creating and Using Custom Functions

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