Exception.Source Property
.NET Framework 3.0
Gets or sets the name of the application or the object that causes the error.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Overridable Property Source As String 'Usage Dim instance As Exception Dim value As String value = instance.Source instance.Source = value
/** @property */ public String get_Source () /** @property */ public void set_Source (String value)
public function get Source () : String public function set Source (value : String)
Not applicable.
Property Value
The name of the application or the object that causes the error.The following code example throws an Exception that sets the Source property in its constructor and then catches the exception and displays Source.
' Example for the Exception.HelpLink, Exception.Source, ' Exception.StackTrace, and Exception.TargetSite properties. Imports System Imports Microsoft.VisualBasic Namespace NDP_UE_VB ' Derive an exception; the constructor sets the HelpLink and ' Source properties. Class LogTableOverflowException Inherits Exception Private Const overflowMessage As String = _ "The log table has overflowed." Public Sub New( auxMessage As String, inner As Exception ) MyBase.New( String.Format( "{0} - {1}", _ overflowMessage, auxMessage ), inner ) Me.HelpLink = "http://msdn.microsoft.com" Me.Source = "Exception_Class_Samples" End Sub ' New End Class ' LogTableOverflowException Class LogTable Public Sub New(numElements As Integer) logArea = New String(numElements) {} elemInUse = 0 End Sub ' New Protected logArea() As String Protected elemInUse As Integer ' The AddRecord method throws a derived exception if ' the array bounds exception is caught. Public Function AddRecord( newRecord As String ) As Integer Try Dim curElement as Integer = elemInUse logArea( elemInUse ) = newRecord elemInUse += 1 Return curElement Catch ex As Exception Throw New LogTableOverflowException( _ String.Format( "Record ""{0}"" was not logged.", _ newRecord ), ex ) End Try End Function ' AddRecord End Class ' LogTable Module OverflowDemo ' Create a log table and force an overflow. Sub Main( ) Dim log As New LogTable( 4 ) Console.WriteLine( "This example of " & vbCrLf & _ " Exception.Message, " & vbCrLf & _ " Exception.HelpLink, " & vbCrLf & _ " Exception.Source, " & vbCrLf & _ " Exception.StackTrace, and " & vbCrLf & _ " Exception.TargetSite " & vbCrLf & _ "generates the following output." ) Try Dim count As Integer = 0 Do log.AddRecord( _ String.Format( "Log record number {0}", count ) ) count += 1 Loop Catch ex As Exception Console.WriteLine( vbCrLf & _ "Message ---" & vbCrLf & ex.Message ) Console.WriteLine( vbCrLf & _ "HelpLink ---" & vbCrLf & ex.HelpLink ) Console.WriteLine( vbCrLf & _ "Source ---" & vbCrLf & ex.Source ) Console.WriteLine( vbCrLf & _ "StackTrace ---" & vbCrLf & ex.StackTrace ) Console.WriteLine( vbCrLf & "TargetSite ---" & _ vbCrLf & ex.TargetSite.ToString( ) ) End Try End Sub ' Main End Module ' OverflowDemo End Namespace ' NDP_UE_VB ' This example of ' Exception.Message, ' Exception.HelpLink, ' Exception.Source, ' Exception.StackTrace, and ' Exception.TargetSite ' generates the following output. ' ' Message --- ' The log table has overflowed. - Record "Log record number 5" was not logged. ' ' HelpLink --- ' http://msdn.microsoft.com ' ' Source --- ' Exception_Class_Samples ' ' StackTrace --- ' at NDP_UE_VB.LogTable.AddRecord(String newRecord) ' at NDP_UE_VB.OverflowDemo.Main() ' ' TargetSite --- ' Int32 AddRecord(System.String)
// Example for the Exception.HelpLink, Exception.Source,
// Exception.StackTrace, and Exception.TargetSite properties.
package NDP_UE_JSL;
import System.* ;
// Derive an exception; the constructor sets the HelpLink and
// Source properties.
class LogTableOverflowException extends System.Exception
{
private String overflowMessage = "The log table has overflowed.";
public LogTableOverflowException(System.String auxMessage,
System.Exception inner)
{
super(String.Format("The log table has overflowed. - {0}",
auxMessage), inner);
this.set_HelpLink("http://msdn.microsoft.com");
this.set_Source("Exception_Class_Samples");
} //LogTableOverflowException
} //LogTableOverflowException
class LogTable
{
public LogTable(int numElements)
{
logArea = new String[numElements];
elemInUse = 0;
} //LogTable
protected String logArea[];
protected int elemInUse;
// The AddRecord method throws a derived exception if
// the array bounds exception is caught.
public int AddRecord(String newRecord) throws LogTableOverflowException
{
try {
logArea.set_Item(elemInUse, newRecord);
return elemInUse++;
}
catch (System.Exception e) {
throw new LogTableOverflowException(
String.Format("Record \"{0}\" was not logged.", newRecord), e);
}
} //AddRecord
} //LogTable
class OverflowDemo
{
// Create a log table and force an overflow.
public static void main(String[] args)
{
LogTable log = new LogTable(4);
Console.WriteLine(("This example of \n Exception.Message, \n"
+ " Exception.HelpLink, \n Exception.Source, \n"
+ " Exception.StackTrace, and \n Exception."
+ "TargetSite \ngenerates the following output."));
try {
for (int count = 1; ; count++) {
log.AddRecord(String.Format("Log record number {0}",
System.Convert.ToString(count)));
}
}
catch (System.Exception ex) {
Console.WriteLine("\nMessage ---\n{0}", ex.get_Message());
Console.WriteLine("\nHelpLink ---\n{0}", ex.get_HelpLink());
Console.WriteLine("\nSource ---\n{0}", ex.get_Source());
Console.WriteLine("\nStackTrace ---\n{0}", ex.get_StackTrace());
Console.WriteLine("\nTargetSite ---\n{0}", ex.get_TargetSite());
}
} //main
} //OverflowDemo
/*
Exception.Message,
Exception.HelpLink,
Exception.Source,
Exception.StackTrace, and
Exception.TargetSite
generates the following output.
Message ---
The log table has overflowed. - Record "Log record number 5" was not logged.
HelpLink ---
http://msdn.microsoft.com
Source ---
Exception_Class_Samples
StackTrace ---
at NDP_UE_JSL.LogTable.AddRecord(String newRecord) in D:\Test\ConsoleApplicat
ion7\ConsoleApplication7\Class1.jsl:line 45
at NDP_UE_JSL.OverflowDemo.main(String[] args) in D:\Test\ConsoleApplication7
\ConsoleApplication7\Class1.jsl:line 62
TargetSite ---
Int32 AddRecord(System.String)
*/
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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