ToBoolean Method (Object)

Convert.ToBoolean Method (Object)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Converts the value of a specified Object to an equivalent Boolean value.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public Shared Function ToBoolean ( _
	value As Object _
) As Boolean

Parameters

value
Type: System.Object
An Object that implements the IConvertible interface or Nothing.

Return Value

Type: System.Boolean
true or false, which reflects the value returned by invoking the IConvertible.ToBoolean method for the underlying type of value. If value is Nothing, the method returns false.

The following code sample illustrates the use of the ToBoolean method, converting a string value to a Boolean type.


Public Sub ConvertStringBoolean(ByVal stringVal As String)

   Dim boolVal As Boolean = False

   Try
      boolVal = System.Convert.ToBoolean(stringVal)
      If boolVal Then
         outputBlock.Text &= String.Format( _
             "String is equal to System.Boolean.TrueString.") & vbCrLf
      Else
         outputBlock.Text &= String.Format( _
             "String is equal to System.Boolean.FalseString.") & vbCrLf
      End If
   Catch exception As System.FormatException
      outputBlock.Text &= String.Format( _
          "The string must equal System.Boolean.TrueString " + _
          "or System.Boolean.FalseString.") & vbCrLf
   End Try

   ' A conversion from bool to string will always succeed.
   stringVal = System.Convert.ToString(boolVal)
   outputBlock.Text &= String.Format("{0} as a String is {1}", _
                             boolVal, stringVal) & vbCrLf
End Sub


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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