ASP.NET in a Nutshell

Name

InnerException

Synopsis

Exception = HttpException.InnerException

Returns an Exception object containing the inner exception of the HttpException object.

Parameters

Exception

An Exception instance that will be populated by the property.

Example

The code example creates two exceptions, the second of which is created with an overloaded constructor that sets the InnerException property to the first exception. The code throws the second exception, which is caught by the Catch statement. The Catch block then displays the error messages of both the outer and inner exceptions:

Sub Page_Load(  )
   Try
      Dim myHttpEx As _
         New HttpException("This is a nested exception")
      Throw New HttpException("Threw an exception from Page_Load", _
         myHttpEx)
   Catch HttpEx As HttpException
      Dim InnerHttpEx As HttpException
      InnerHttpEx = CType(HttpEx.InnerException, HttpException)
      Message.Text = "ERROR:<br/>"
      Message.Text &= "Message: " & HttpEx.Message & "<br/>"
      Message.Text &= "Inner Exception Message: " & _
         InnerHttpEx.Message & "<br/>"
   End Try
End Sub

Notes

The InnerException property allows exceptions to be nested, which can allow developers to track down the root cause of an exception, even when multiple exceptions are thrown. Because the InnerException property is inherited from the Exception class, other types of exceptions can be nested within an HttpException, and HttpExceptions can be nested within other exception types. The InnerException property can only be set manually through one of the overloaded constructors ...