Convert.ToBoolean Method (Object)

Parameters

• value
  Type: System.Object
  An Object that implements the IConvertible interface or nulla null reference (Nothing in Visual Basic).

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 nulla null reference (Nothing in Visual Basic), the method returns false.

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

public void ConvertStringBoolean(string stringVal)
{
   bool boolVal = false;

   try
   {
      boolVal = System.Convert.ToBoolean(stringVal);
      if (boolVal)
      {
         outputBlock.Text += String.Format(
            "String was equal to System.Boolean.TrueString.") + "\n";
      }
      else
      {
         outputBlock.Text += String.Format(
            "String was equal to System.Boolean.FalseString.") + "\n";
      }
   }
   catch (System.FormatException)
   {
      outputBlock.Text += String.Format(
         "The string must equal System.Boolean.TrueString " +
         "or System.Boolean.FalseString.") + "\n";
   }

   // 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) + "\n";
}