ThreadExceptionEventArgs Klasse

Definition

Stellt Daten für das ThreadException-Ereignis bereit.Provides data for the ThreadException event.

public ref class ThreadExceptionEventArgs : EventArgs
public class ThreadExceptionEventArgs : EventArgs
type ThreadExceptionEventArgs = class
    inherit EventArgs
Public Class ThreadExceptionEventArgs
Inherits EventArgs
Vererbung
ThreadExceptionEventArgs
Abgeleitet

Beispiele

Im folgenden Beispiel können Sie ein ThreadException Ereignis durch Klicken auf button1 in einem Formular erhöhen.The following example allows you to raise a ThreadException event by clicking button1 on a form. Im Beispiel werden zwei Klassen erstellt.The example creates two classes. Die ErrorHandler-Klasse erstellt das Formular und die Schaltfläche, die das-Ereignis auslöst.The ErrorHandler class creates the form and the button that raises the event. Die CustomExceptionHandler-Klasse stellt die Methoden bereit, mit denen die Ausnahme behandelt wird.The CustomExceptionHandler class provides the methods to handle the exception.

In Main in der ErrorHandler-Klasse erstellt der Code eine neue Instanz der Ausnahme Behandlungs Klasse, d. h. eine Instanz der CustomExceptionHandler.In Main in the ErrorHandler class, the code creates a new instance of the exception handling class, that is, an instance of the CustomExceptionHandler. Anschließend wird die Instanz dem-Ereignis hinzugefügt, und die Anwendung wird ausgeführt.Then the instance is added to the event, and the application is run.

In der OnThreadException-Methode in der CustomExceptionHandler-Klasse wird im Beispiel eine try...catch...finally-Anweisung verwendet, um die Ausnahme zu verarbeiten.In the OnThreadException method in the CustomExceptionHandler class, the example uses a try...catch...finally statement to process the exception. Die ShowThreadExceptionDialog-Methode erstellt die anzuzeigende Meldung und zeigt Sie in einem Meldungs Feld an.The ShowThreadExceptionDialog method creates the message to display, and displays it in a message box.

using System;
using System.Threading;
using System.Windows.Forms;

// Create a form with a button that, when clicked, throws an exception.
 public class ErrorForm : System.Windows.Forms.Form
 {
    internal Button button1;

    public ErrorForm() : base()
    {
       // Add the button to the form.
       this.button1 = new System.Windows.Forms.Button();
       this.SuspendLayout();
       this.button1.Location = new System.Drawing.Point(100, 43);
       this.button1.Size = new System.Drawing.Size(75, 23);
       this.button1.Text = "Click!";
       this.Controls.Add(this.button1);
       this.button1.Click += new EventHandler(this.button1_Click);

       this.Text = "ThreadException";
       this.ResumeLayout(false);
    }

    // Throw an exception when the button is clicked.
    private void button1_Click(object sender, System.EventArgs e)
    {
       throw new ArgumentException("The parameter was invalid");
    }
 
    public static void Main()
    {
       // Add the event handler.
       Application.ThreadException += new ThreadExceptionEventHandler(CustomExceptionHandler.OnThreadException);

       // Start the example.
       Application.Run(new ErrorForm());
    }
 }
 
 // Create a class to handle the exception event.
 internal class CustomExceptionHandler
 {
     // Handle the exception event
    public static void OnThreadException(object sender, ThreadExceptionEventArgs t)
    {
       DialogResult result = ShowThreadExceptionDialog(t.Exception);

       // Exit the program when the user clicks Abort.
       if (result == DialogResult.Abort) 
          Application.Exit();
    }
 
    // Create and display the error message.
    private static DialogResult ShowThreadExceptionDialog(Exception e)
    {
       string errorMsg = "An error occurred.  Please contact the adminstrator " +
            "with the following information:\n\n";
       errorMsg += String.Format("Exception Type: {0}\n\n", e.GetType().Name);
       errorMsg += "\n\nStack Trace:\n" + e.StackTrace;
       return MessageBox.Show(errorMsg, "Application Error", 
            MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop);
    }
 }
 
Imports System.Threading
Imports System.Windows.Forms

' Create a form with a button that, when clicked, throws an exception.
Public Class ErrorForm : Inherits Form
    Friend WithEvents button1 As Button

    Public Sub New()
       ' Add the button to the form.
      Me.button1 = New System.Windows.Forms.Button()
      Me.SuspendLayout()
      Me.button1.Location = New System.Drawing.Point(100, 43)
      Me.button1.Size = New System.Drawing.Size(75, 23)
      Me.button1.Text = "Click!"
      Me.Controls.Add(Me.button1)

      Me.Text = "ThreadException"
      Me.ResumeLayout(False)
   End Sub

    ' Throw an exception when the button is clicked.
    Private Sub button1_Click(sender As Object, e As System.EventArgs) _
                Handles button1.Click
        Throw New ArgumentException("The parameter was invalid.")
    End Sub
    
    Public Shared Sub Main()
        ' Add the event handler.
        AddHandler Application.ThreadException,
                   AddressOf CustomExceptionHandler.OnThreadException
        
        ' Start the example.
        Application.Run(New ErrorForm())
    End Sub
End Class

' Create a class to handle the exception event.
Friend Class CustomExceptionHandler
    'Handle the exception event.
    Public Shared Sub OnThreadException(sender As Object, t As ThreadExceptionEventArgs)
        Dim result As DialogResult = ShowThreadExceptionDialog(t.Exception)

        ' Exit the program when the user clicks Abort.
        If result = DialogResult.Abort Then
            Application.Exit()
        End If
    End Sub
     
    ' Create and display the error message.
    Private Shared Function ShowThreadExceptionDialog(e As Exception) As DialogResult
        Dim errorMsg As String = "An error occurred.  Please contact the " &
            "adminstrator with the following information:" &
            vbCrLf & vbCrLf
        errorMsg &= "Exception Type: " & e.GetType().Name & vbCrLf & vbCrLf
        errorMsg &= e.Message & vbCrLf & vbCrLf
        errorMsg &= "Stack Trace: " & vbCrLf & e.StackTrace

        Return MessageBox.Show(errorMsg, "Application Error",
               MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop)
    End Function
End Class

Hinweise

Ein ThreadExceptionEventArgs wird von einem Thread erstellt, wenn eine nicht behandelte Ausnahme auftritt.A ThreadExceptionEventArgs is created by a thread when an unhandled exception occurs. ThreadExceptionEventArgs enthält die Exception, die aufgetreten sind.ThreadExceptionEventArgs contains the Exception that occurred.

Konstruktoren

ThreadExceptionEventArgs(Exception)

Initialisiert eine neue Instanz der ThreadExceptionEventArgs-Klasse.Initializes a new instance of the ThreadExceptionEventArgs class.

Eigenschaften

Exception

Ruft die aufgetretene Exception ab.Gets the Exception that occurred.

Methoden

Equals(Object)

Ermittelt, ob das angegebene Objekt und das aktuelle Objekt gleich sind.Determines whether the specified object is equal to the current object.

(Geerbt von Object)
GetHashCode()

Dient als die Standard-HashfunktionServes as the default hash function.

(Geerbt von Object)
GetType()

Ruft den Type der aktuellen Instanz ab.Gets the Type of the current instance.

(Geerbt von Object)
MemberwiseClone()

Erstellt eine flache Kopie des aktuellen Object.Creates a shallow copy of the current Object.

(Geerbt von Object)
ToString()

Gibt eine Zeichenfolge zurück, die das aktuelle Objekt darstellt.Returns a string that represents the current object.

(Geerbt von Object)

Gilt für:

Siehe auch