ThreadExceptionEventArgs.Exception Propriété
Important
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Obtient le Exception qui s'est produit.
public:
property Exception ^ Exception { Exception ^ get(); };
public Exception Exception { get; }
member this.Exception : Exception
Public ReadOnly Property Exception As Exception
Exception survenue.
L’exemple suivant vous permet de déclencher un ThreadException événement en button1
cliquant sur un formulaire. L’exemple crée deux classes. La ErrorHandler
classe crée le formulaire et le bouton qui déclenche l’événement. La CustomExceptionHandler
classe fournit les méthodes pour gérer l’exception.
Dans Main
la ErrorHandler
classe , le code crée un instance de la classe de gestion des exceptions, c’est-à-dire une instance du CustomExceptionHandler
. Ensuite, le instance est ajouté à l’événement et l’application est exécutée.
Dans la OnThreadException
méthode de la CustomExceptionHandler
classe , l’exemple utilise une try...catch...finally
instruction pour traiter l’exception. La ShowThreadExceptionDialog
méthode crée le message à afficher et l’affiche dans une boîte de message.
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
Produit | Versions |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
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