ThreadExceptionEventArgs Kelas

Definisi

Ruang nama:

System.Threading

Rakitan:

System.Threading.Thread.dll

Sumber:

ThreadExceptionEventArgs.cs

Menyediakan data untuk peristiwa tersebut ThreadException .

public ref class ThreadExceptionEventArgs : EventArgs

public class ThreadExceptionEventArgs : EventArgs

type ThreadExceptionEventArgs = class
    inherit EventArgs

Public Class ThreadExceptionEventArgs
Inherits EventArgs

Warisan

Object

EventArgs

ThreadExceptionEventArgs

Turunan

Microsoft.VisualBasic.ApplicationServices.UnhandledExceptionEventArgs

Contoh

Contoh berikut memungkinkan Anda untuk menaikkan ThreadException acara dengan mengklik button1 formulir. Contohnya membuat dua kelas. Kelas ErrorHandler membuat formulir dan tombol yang menaikkan acara. Kelas CustomExceptionHandler menyediakan metode untuk menangani pengecualian.

ErrorHandler Di Main kelas , kode membuat instans baru dari kelas penanganan pengecualian, yaitu, instans dari CustomExceptionHandler. Kemudian instans ditambahkan ke peristiwa, dan aplikasi dijalankan.

OnThreadException Dalam metode di CustomExceptionHandler kelas , contoh menggunakan try...catch...finally pernyataan untuk memproses pengecualian. Metode membuat ShowThreadExceptionDialog pesan untuk ditampilkan, dan menampilkannya dalam kotak pesan.

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

Keterangan

ThreadExceptionEventArgs dibuat oleh utas ketika pengecualian yang tidak tertangani terjadi. ThreadExceptionEventArgs Exception berisi yang terjadi.

Konstruktor

ThreadExceptionEventArgs(Exception)

Menginisialisasi instans baru kelas ThreadExceptionEventArgs.

Properti

Exception

Exception Mendapatkan yang terjadi.

Metode

Equals(Object)	Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object)
GetHashCode()	Berfungsi sebagai fungsi hash default. (Diperoleh dari Object)
GetType()	Mendapatkan dari instans Type saat ini. (Diperoleh dari Object)
MemberwiseClone()	Membuat salinan dangkal dari saat ini Object. (Diperoleh dari Object)
ToString()	Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object)

Lihat juga

• Thread
• ThreadStart
• ThreadExceptionEventHandler