逛了一下书店.发现了有一本书提到.的一个现象.就是下载网页的时候由于用的是主线程这样.然后就会造成程序窗口移动的不方便.卡住的感觉.提到了下载可以用到另外的一个线程.于是就开始学习多线程了.
程序好了后果然和原来的有很大的差别下载的时候窗口不会卡住了.而且内容也是一下就闪了出来.
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Text;
using System.Threading;
using System.IO;
namespace Banyiweb
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
///
public delegate void UpdateList (string str) ;
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBoxWeb;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.StatusBar statusBar1;
private System.Windows.Forms.RichTextBox richTextBox1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TOD 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
this.label1 = new System.Windows.Forms.Label();
this.textBoxWeb = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.statusBar1 = new System.Windows.Forms.StatusBar();
this.richTextBox1 = new System.Windows.Forms.RichTextBox();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(0, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.TabIndex = 0;
this.label1.Text = "请输入网址:";
//
// textBoxWeb
//
this.textBoxWeb.Location = new System.Drawing.Point(80, 8);
this.textBoxWeb.Name = "textBoxWeb";
this.textBoxWeb.Size = new System.Drawing.Size(248, 21);
this.textBoxWeb.TabIndex = 1;
this.textBoxWeb.Text = "http://www.";
//
// button1
//
this.button1.Location = new System.Drawing.Point(344, 8);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 20);
this.button1.TabIndex = 2;
this.button1.Text = "提交";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// statusBar1
//
this.statusBar1.Location = new System.Drawing.Point(0, 351);
this.statusBar1.Name = "statusBar1";
this.statusBar1.Size = new System.Drawing.Size(416, 22);
this.statusBar1.TabIndex = 5;
this.statusBar1.Text = "http://www.banyi.com/txxl by: banyi";
//
// richTextBox1
//
this.richTextBox1.Location = new System.Drawing.Point(0, 32);
this.richTextBox1.Name = "richTextBox1";
this.richTextBox1.Size = new System.Drawing.Size(416, 320);
this.richTextBox1.TabIndex = 6;
this.richTextBox1.Text = "请正确输入网址，在程序找不到网址的时候会变慢";
//
// Form1
//
this.AutoScale = false;
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(416, 373);
this.Controls.Add(this.richTextBox1);
this.Controls.Add(this.statusBar1);
this.Controls.Add(this.button1);
this.Controls.Add(this.textBoxWeb);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "网页源代码";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
getweb getweb1 = new getweb();
getweb1.webstr=textBoxWeb.Text;
Thread mythread;
getweb1.ul= new UpdateList(UpdateMyList);
mythread = new Thread ( new ThreadStart (getweb1.web) ) ; //初始化一个线程实例
mythread.Start ( ) ; //启动线程
}
public void UpdateMyList(string str)
{
richTextBox1.Text=str;
}
public class getweb
{
public UpdateList ul;
public string webstr;
public void web()
{
if (webstr.IndexOf("http:") <0)
{
MessageBox.Show("出错了 banyi","你输入的网址有误");
return;
}
HttpWebResponse res;
HttpWebRequest req;
try
{
req=(HttpWebRequest)WebRequest.Create(webstr);
res=(HttpWebResponse)req.GetResponse();
}
catch (Exception)
{
MessageBox.Show("出错了 banyi","对不起找不到该网址");
return;
}
StreamReader strm=new StreamReader(res.GetResponseStream(),Encoding.GetEncoding(54936));//简体中文 Encoding.GetEncoding(54936),Encoding.ASCII
string sLine;
string sLine2;
sLine2="";
do //学习笔记do循环C# do while 循环体 loop do until 循环体 loop
{
sLine=strm.ReadLine();
sLine2=sLine2+sLine;
}
while (sLine!=null);
strm.Close();
ul(sLine2);
}
}
}
}
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