Nasıl yapılır: Bir Windows Form içinde Zaman Uyumsuz Ses Yükleme
Aşağıdaki kod örneği bir URL 'den bir sesi zaman uyumsuz olarak yükler ve ardından yeni bir iş parçacığında yürütür.
Örnek
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Media;
using System.Windows.Forms;
namespace SoundPlayerLoadAsyncExample
{
public class Form1 : Form
{
private SoundPlayer Player = new SoundPlayer();
public Form1()
{
InitializeComponent();
this.Player.LoadCompleted += new AsyncCompletedEventHandler(Player_LoadCompleted);
}
private void playSoundButton_Click(object sender, EventArgs e)
{
this.LoadAsyncSound();
}
public void LoadAsyncSound()
{
try
{
// Replace this file name with a valid file name.
this.Player.SoundLocation = "http://www.tailspintoys.com/sounds/stop.wav";
this.Player.LoadAsync();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error loading sound");
}
}
// This is the event handler for the LoadCompleted event.
void Player_LoadCompleted(object sender, AsyncCompletedEventArgs e)
{
if (Player.IsLoadCompleted)
{
try
{
this.Player.Play();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error playing sound");
}
}
}
private Button playSoundButton;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.playSoundButton = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// playSoundButton
//
this.playSoundButton.Location = new System.Drawing.Point(106, 112);
this.playSoundButton.Name = "playSoundButton";
this.playSoundButton.Size = new System.Drawing.Size(75, 23);
this.playSoundButton.TabIndex = 0;
this.playSoundButton.Text = "Play Sound";
this.playSoundButton.Click += new System.EventHandler(this.playSoundButton_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.playSoundButton);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
}
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
}
Imports System.Media
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Friend WithEvents playSoundButton As System.Windows.Forms.Button
Private WithEvents Player As New SoundPlayer
Sub New()
Me.InitializeComponent()
End Sub
Private Sub playSoundButton_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles playSoundButton.Click
' Replace this file name with a valid file name.
Me.Player.SoundLocation = "http://www.tailspintoys.com/sounds/stop.wav"
Me.Player.LoadAsync()
End Sub
Private Sub Player_LoadCompleted( _
ByVal sender As Object, _
ByVal e As _
System.ComponentModel.AsyncCompletedEventArgs) _
Handles Player.LoadCompleted
If Me.Player.IsLoadCompleted Then
Me.Player.Play()
End If
End Sub
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.playSoundButton = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'playSoundButton
'
Me.playSoundButton.Location = New System.Drawing.Point(105, 107)
Me.playSoundButton.Name = "playSoundButton"
Me.playSoundButton.Size = New System.Drawing.Size(75, 23)
Me.playSoundButton.TabIndex = 0
Me.playSoundButton.Text = "Play Sound"
Me.playSoundButton.UseVisualStyleBackColor = True
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.Add(Me.playSoundButton)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<STAThread()> _
Shared Sub Main()
Application.EnableVisualStyles()
Application.Run(New Form1())
End Sub
End Class
Kod Derleniyor
Bu örnek şunları gerektirir:
Sisteme ve sisteme başvurular. Windows. Forms derlemeleri.
Dosya adını
"http://www.tailspintoys.com/sounds/stop.wav"geçerli bir dosya adıyla değiştirirsiniz.
Güçlü Programlama
Dosya işlemleri uygun özel durum işleme blokları içine alınmalıdır.
Aşağıdaki koşullar özel bir duruma neden olabilir:
Yol adı hatalı biçimlendirilmiş. Örneğin, geçerli olmayan veya yalnızca boşluk (sınıf) olan karakterler içeriyor ArgumentException .
Yol salt okunurdur ( IOException sınıf).
Yol adı
Nothing( ArgumentNullException sınıf).Yol adı çok uzun ( PathTooLongException sınıf).
Yol geçerli değil ( DirectoryNotFoundException sınıf).
Yol yalnızca bir iki nokta üst üste ":" ( NotSupportedException sınıf).
.NET Framework Güvenliği
Dosya adına dayanarak dosyanın içeriği ile ilgili kararlar vermeyin. örneğin, dosya Form1.vb bir Visual Basic kaynak dosyası olmayabilir. Verileri uygulamanızda kullanmadan önce tüm girişleri doğrulayın.