Caution
This API supports obsolete formatter-based serialization. It should not be called or extended by application code.
Initializes a new instance of the Exception class with serialized data.
protected:
Exception(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);
[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
protected Exception(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
protected Exception(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
[<System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new Exception : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> Exception
new Exception : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> Exception
Protected Sub New (info As SerializationInfo, context As StreamingContext)
Parameters
The class name is null
or HResult is zero (0).
The following code example defines a derived serializable Exception
class. The code forces a divide-by-0 error and then creates an instance of the derived exception using the (SerializationInfo, StreamingContext) constructor. The code serializes the instance to a file, deserializes the file into a new exception, which it throws, and then catches and displays the exception's data.
using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap;
// Define a serializable derived exception class.
[Serializable]
class SecondLevelException : Exception, ISerializable
{
// This public constructor is used by class instantiators.
public SecondLevelException(string message, Exception inner) :
base(message, inner)
{
HelpLink = "http://MSDN.Microsoft.com";
Source = "Exception_Class_Samples";
}
// This protected constructor is used for deserialization.
protected SecondLevelException(SerializationInfo info,
StreamingContext context) :
base(info, context)
{ }
// GetObjectData performs a custom serialization.
public override void GetObjectData(SerializationInfo info,
StreamingContext context)
{
// Change the case of two properties, and then use the
// method of the base class.
HelpLink = HelpLink.ToLower();
Source = Source.ToUpperInvariant();
base.GetObjectData(info, context);
}
}
class SerializationDemo
{
public static void Main()
{
Console.WriteLine(
"This example of the Exception constructor " +
"and Exception.GetObjectData\nwith Serialization" +
"Info and StreamingContext parameters " +
"generates \nthe following output.\n");
try
{
// This code forces a division by 0 and catches the
// resulting exception.
try
{
int zero = 0;
int ecks = 1 / zero;
}
catch (Exception ex)
{
// Create a new exception to throw again.
SecondLevelException newExcept =
new SecondLevelException(
"Forced a division by 0 and threw " +
"another exception.", ex);
Console.WriteLine(
"Forced a division by 0, caught the " +
"resulting exception, \n" +
"and created a derived exception:\n");
Console.WriteLine("HelpLink: {0}",
newExcept.HelpLink);
Console.WriteLine("Source: {0}",
newExcept.Source);
// This FileStream is used for the serialization.
FileStream stream =
new FileStream("NewException.dat",
FileMode.Create);
try
{
// Serialize the derived exception.
SoapFormatter formatter =
new SoapFormatter(null,
new StreamingContext(
StreamingContextStates.File));
formatter.Serialize(stream, newExcept);
// Rewind the stream and deserialize the
// exception.
stream.Position = 0;
SecondLevelException deserExcept =
(SecondLevelException)
formatter.Deserialize(stream);
Console.WriteLine(
"\nSerialized the exception, and then " +
"deserialized the resulting stream " +
"into a \nnew exception. " +
"The deserialization changed the case " +
"of certain properties:\n");
// Throw the deserialized exception again.
throw deserExcept;
}
catch (SerializationException se)
{
Console.WriteLine("Failed to serialize: {0}",
se.ToString());
}
finally
{
stream.Close();
}
}
}
catch (Exception ex)
{
Console.WriteLine("HelpLink: {0}", ex.HelpLink);
Console.WriteLine("Source: {0}", ex.Source);
Console.WriteLine();
Console.WriteLine(ex.ToString());
}
}
}
/*
This example displays the following output.
Forced a division by 0, caught the resulting exception,
and created a derived exception:
HelpLink: http://MSDN.Microsoft.com
Source: Exception_Class_Samples
Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:
HelpLink: http://msdn.microsoft.com
Source: EXCEPTION_CLASS_SAMPLES
NDP_UE_CS.SecondLevelException: Forced a division by 0 and threw another except
ion. ---> System.DivideByZeroException: Attempted to divide by zero.
at NDP_UE_CS.SerializationDemo.Main()
--- End of inner exception stack trace ---
at NDP_UE_CS.SerializationDemo.Main()
*/
open System
open System.IO
open System.Runtime.Serialization
open System.Runtime.Serialization.Formatters.Soap
open System.Security.Permissions
// Define a serializable derived exception class.
[<Serializable>]
type SecondLevelException =
inherit Exception
interface ISerializable with
// GetObjectData performs a custom serialization.
member this.GetObjectData(info: SerializationInfo, context: StreamingContext) =
// Change the case of two properties, and then use the
// method of the base class.
this.HelpLink <- this.HelpLink.ToLower()
this.Source <- this.Source.ToUpperInvariant()
base.GetObjectData( info, context )
// This public constructor is used by class instantiators.
new (message: string, inner: Exception) as this =
{ inherit Exception(message, inner) }
then
this.HelpLink <- "http://MSDN.Microsoft.com"
this.Source <- "Exception_Class_Samples"
// This protected constructor is used for deserialization.
new (info: SerializationInfo, context: StreamingContext) =
{ inherit Exception(info, context) }
printfn
"""This example of the Exception constructor and Exception.GetObjectData
with SerializationInfo and StreamingContext parameters generates
the following output.
"""
try
// This code forces a division by 0 and catches the
// resulting exception.
try
let zero = 0
let ecks = 1 / zero
()
with ex ->
// Create a new exception to throw again.
let newExcept = SecondLevelException("Forced a division by 0 and threw another exception.", ex)
printfn "Forced a division by 0, caught the resulting exception, \nand created a derived exception:\n"
printfn $"HelpLink: {newExcept.HelpLink}"
printfn $"Source: {newExcept.Source}"
// This FileStream is used for the serialization.
use stream = new FileStream("NewException.dat", FileMode.Create)
try
// Serialize the derived exception.
let formatter = SoapFormatter(null, StreamingContext StreamingContextStates.File)
formatter.Serialize(stream, newExcept)
// Rewind the stream and deserialize the
// exception.
stream.Position <- 0L
let deserExcept = formatter.Deserialize stream :?> SecondLevelException
printfn
"""
Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:
"""
// Throw the deserialized exception again.
raise deserExcept
with :? SerializationException as se ->
printfn $"Failed to serialize: {se}"
with ex ->
printfn $"HelpLink: {ex.HelpLink}"
printfn $"Source: {ex.Source}"
printfn $"\n{ex}"
// This example displays the following output.
// Forced a division by 0, caught the resulting exception,
// and created a derived exception:
//
// HelpLink: http://MSDN.Microsoft.com
// Source: Exception_Class_Samples
//
// Serialized the exception, and then deserialized the resulting stream into a
// new exception. The deserialization changed the case of certain properties:
//
// HelpLink: http://msdn.microsoft.com
// Source: EXCEPTION_CLASS_SAMPLES
//
// NDP_UE_FS_3+SecondLevelException: Forced a division by 0 and threw another except
// ion. ---> System.DivideByZeroException: Attempted to divide by zero.
// at <StartupCode$fs>.$NDP_UE_FS_3.main@()
// --- End of inner exception stack trace ---
// at <StartupCode$fs>.$NDP_UE_FS_3.main@()
' If compiling with the Visual Basic compiler (vbc.exe) from the command
' prompt, be sure to add the following switch:
' /reference:System.Runtime.Serialization.Formatters.Soap.dll
Imports System.IO
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Security.Permissions
' Define a serializable derived exception class.
<Serializable()> _
Class SecondLevelException
Inherits Exception
' This public constructor is used by class instantiators.
Public Sub New( message As String, inner As Exception )
MyBase.New( message, inner )
HelpLink = "http://MSDN.Microsoft.com"
Source = "Exception_Class_Samples"
End Sub
' This protected constructor is used for deserialization.
Protected Sub New( info As SerializationInfo, _
context As StreamingContext )
MyBase.New( info, context )
End Sub
' GetObjectData performs a custom serialization.
<SecurityPermissionAttribute(SecurityAction.Demand, _
SerializationFormatter:=True)> _
Overrides Sub GetObjectData( info As SerializationInfo, _
context As StreamingContext)
' Change the case of two properties, and then use the
' method of the base class.
HelpLink = HelpLink.ToLower()
Source = Source.ToUpperInvariant()
MyBase.GetObjectData(info, context)
End Sub
End Class
Module SerializationDemo
Sub Main()
Console.WriteLine( _
"This example of the Exception constructor " & _
"and Exception.GetObjectData " & vbCrLf & _
"with SerializationInfo and StreamingContext " & _
"parameters generates " & vbCrLf & _
"the following output." & vbCrLf )
' This code forces a division by 0 and catches the
' resulting exception.
Try
Try
Dim zero As Integer = 0
Dim ecks As Integer = 1 \ zero
' Create a new exception to throw again.
Catch ex As Exception
Dim newExcept As New SecondLevelException( _
"Forced a division by 0 and threw " & _
"another exception.", ex )
Console.WriteLine( _
"Forced a division by 0, caught the " & _
"resulting exception, " & vbCrLf & _
"and created a derived exception:" & vbCrLf )
Console.WriteLine( "HelpLink: {0}", _
newExcept.HelpLink )
Console.WriteLine( "Source: {0}", _
newExcept.Source )
' This FileStream is used for the serialization.
Dim stream As New FileStream( _
"NewException.dat", FileMode.Create )
' Serialize the derived exception.
Try
Dim formatter As New SoapFormatter( Nothing, _
New StreamingContext( _
StreamingContextStates.File ) )
formatter.Serialize( stream, newExcept )
' Rewind the stream and deserialize the
' exception.
stream.Position = 0
Dim deserExcept As SecondLevelException = _
CType( formatter.Deserialize( stream ), _
SecondLevelException )
Console.WriteLine( vbCrLf & _
"Serialized the exception, and then " & _
"deserialized the resulting stream " & _
"into a " & vbCrLf & "new exception. " & _
"The deserialization changed the case " & _
"of certain properties:" & vbCrLf )
' Throw the deserialized exception again.
Throw deserExcept
Catch se As SerializationException
Console.WriteLine( "Failed to serialize: {0}", _
se.ToString( ) )
Finally
stream.Close( )
End Try
End Try
Catch ex As Exception
Console.WriteLine( "HelpLink: {0}", ex.HelpLink )
Console.WriteLine( "Source: {0}", ex.Source )
Console.WriteLine( )
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
End Module
' This example displays the following output:
'
' Forced a division by 0, caught the resulting exception,
' and created a derived exception:
'
' HelpLink: http://MSDN.Microsoft.com
' Source: Exception_Class_Samples
'
' Serialized the exception, and then deserialized the resulting stream into a
' new exception. The deserialization changed the case of certain properties:
'
' HelpLink: http://msdn.microsoft.com
' Source: EXCEPTION_CLASS_SAMPLES
'
' NDP_UE_VB.SecondLevelException: Forced a division by 0 and threw another exce
' ption. ---> System.DivideByZeroException: Attempted to divide by zero.
' at NDP_UE_VB.SerializationDemo.Main()
' --- End of inner exception stack trace ---
' at NDP_UE_VB.SerializationDemo.Main()
Remarks
This constructor is called during deserialization to reconstitute the exception object transmitted over a stream. For more information, see XML and SOAP Serialization.
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