Spread Windows Forms 9.0 Product Documentation
ToBool Method
Example 


Value to convert
Converts the specified value to a boolean value.
Syntax
'Declaration
 
Public Shared Function ToBool( _
   ByVal value As Object _
) As Boolean
'Usage
 
Dim value As Object
Dim value As Boolean
 
value = CalcConvert.ToBool(value)
public static bool ToBool( 
   object value
)

Parameters

value
Value to convert

Return Value

Boolean value equivalent to the specified value
Exceptions
ExceptionDescription
System.InvalidCastExceptionValue cannot be converted.
Example
This example converts the value to a boolean.
public class TrueFunctionInfo : FunctionInfo
    {
        public override string Name { get { return "TRUEIT"; } }
        public override int MinArgs { get { return 1; } }
        public override int MaxArgs { get { return 1; } }
        public override object Evaluate (object[] args)
        {
            bool b = CalcConvert.ToBool(args[0]);
            return b; 
        }
    }
Public Class TrueFunctionInfo
   Inherits FarPoint.CalcEngine.FunctionInfo

   Public Overrides ReadOnly Property Name() As String
   Get
   Return "TRUEIT"
   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 b As Boolean = FarPoint.CalcEngine.CalcConvert.ToBool(args(0))
   Return b
   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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