WebServices

分布式程序

程序分布在多个服务器，数据来至多个服务器

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面向服务的架构

服务提供者把服务提供给中间人，然后中间人向客户服务

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WebServices：夸网络提供服务的集合

Web服务优点：基于标准，非商业性，简便性，独立于语言和平台，功能抽象，可发现性，提高开发效率

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Web服务标准

Soap（简单对象协议）：基于xml的简单访问协议，实现远程调用

UDDI（统一描述发现和集成）：为web服务提供信息注册的实现标准规范

WSDL（web服务描述语言）：xml描述的web服务接口

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编写website

创建工程，web服务

[WebMethod]

??? public int NumAdd(int a,int b)

??? {

??????? return a + b;

}

在每个方法前加上[WebMethod]

然后在写方法，方法的权限为公开，且有返回值

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添加web引用到项目中

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在项目中引用web服务

创建全局对象

在项目中web服务的位置.Service? s=new 在项目中web服务的位置.Service（）；

然后在需要的位置使用对象调用方法

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用户调用web服务，中间产生了一个代理类，使用代理类即可

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操作线程进度条（委托事件）

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Threading;

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namespace WindowsFormsApplication1

{

??? public partial class Form1 : Form

??? {

??????? //声明委托

??????? delegate void MyDelegate(int i);

??????? //将委托设置为空

??????? MyDelegate md = null;

??????? //声明线程

??????? Thread thread;

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??????? void ShowMessage(int i)

??????? {

???????? ???this.progressBar1.Value = i;

??????????? this.textBox1.Text = i.ToString();

??????? }

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??????? public Form1()

??????? {

??????????? InitializeComponent();

??????? }

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??????? private void button1_Click(object sender,EventArgs e)

??????? {

??????????? md = new MyDelegate(ShowMessage);

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??????????? thread = new Thread(MyEvent);

??????????? thread.IsBackground = true;

??? //IsBackground 是否后台

??????????? //这个属性很重要 .如果 Thread IsBackground 等于false

??????????? // 当线程还没有结束时，你点了关闭按钮

??????????? // 将抛出An unhandled exception

??????????? //of type 'System.InvalidOperationException'

??????????? //occurred in System.Windows.Forms.dll 异常

???????? ???thread.Start();

??????? }

??????? public void MyEvent()

??????? {

??????????? for (int i = 0; i < 100;i++ )

??????????? {

??????????????? Thread.Sleep(500);

??????????????? //线程异步执行（同时执行）

??????????????? this.BeginInvoke(md,new object[]{i});

?????????? ?}

??????? }

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??????? private void button2_Click(object sender,EventArgs e)

??????? {

??????????? //线程暂停

??????????? thread.Suspend();

??????? }

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??????? private void button4_Click(object sender,EventArgs e)

??????? {

??????????? //恢复线程

??????????? thread.Resume();

??????? }

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??????? private void button3_Click(object sender,EventArgs e)

??????? {

??????????? //终止线程

??????????? if (thread.IsAlive)

??????????? {

??????????????? thread.Abort();

??????????? }

??????? }

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??? }

}

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Threading;

using System.IO;

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namespace WindowsFormsApplication2

{

??? public partial class Form1 : Form

??? {

??????? public Form1()

??????? {

??????????? InitializeComponent();

??????? }

??????? delegate void MyDelegate(string str);

??????? MyDelegate md = null;

??????? Thread th = null;

??????? private void btnStart_Click(object sender,EventArgs e)

??????? {

??????????? md = new MyDelegate(ShowMessage);

??????????? th = new Thread(Event);

??????????? th.IsBackground=true;

??????????? th.Start();

??????? }

??????? void ShowMessage(string str)

??????? {

??????????? tbShow.Text= str;

? ??????}

??????? void Event()

??????? {

??????????? FileStream fs = new FileStream(@"E:/培训/3.30/list.txt",FileMode.Open,FileAccess.Read);

??????????? StreamReader sr = new StreamReader(fs);

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??????????? List<string> list = new List<string>();

??????????? string s = null;

??????????? do

??????????? {??

??????????????? s=sr.ReadLine();

???? ???????????list.Add(s);

??????????? }while(s!=null);

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??????????? while(true)

??????????? {

??????????????? Thread.Sleep(10);

??????????????? Random rd = new Random();

??????????????? int i = rd.Next(10);

??????????????? this.BeginInvoke(md,new object[] { list[i]});

??????????? }

??????????? sr.Close();

??????????? fs.Close();

??????? }

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??????? private void btnSuspend_Click(object sender,EventArgs e)

??????? {

??????????? th.Suspend();

??????? }

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??????? private void btnResume_Click(object sender,EventArgs e)

??????? {

??????????? th.Resume();

??????? }

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??? }

}

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文件操作（字节数据）

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

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namespace WindowsFormsApplication3

{

??? public partial class Form1 : Form

??? {

??????? public Form1()

??????? {

??????????? InitializeComponent();

??????? }

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??????? private void button1_Click(object sender,EventArgs e)

??????? {

?? ?????????//使用FileStream操作二进制文件，二进制文件使用字节存储

??????????? FileStream stream = new FileStream(@"E:/a.ini",FileMode.Create,FileAccess.Write);

??????????? //将整数转换成字节

??????????? byte[] bytes = BitConverter.GetBytes(Convert.ToInt32(textBox1.Text.Trim()));

??????????? //向文件中写入字节数组，参数1表示字节数组，参数2表示从数组的哪个地方开始，参数3表示写入的长度

??????????? stream.Write(bytes,bytes.Length);

??????????? stream.Close();

??????????? MessageBox.Show("成功！");

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??????? }

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??????? private void button2_Click(object sender,EventArgs e)

??????? {

?????????? ?FileStream stream = new FileStream(@"E:/a.ini",FileAccess.Read);

??????????? byte[] b=new byte[stream.Length];

??????????? stream.Read(b,(int)stream.Length);

??????????? //字节转换成整数,BitConverter.ToInt32(参数1，参数2)

??????????? //参数1，表示字节数组，参数2表示从第几个字节开始，注意基本数据的字节数

??????????? //比如说，从第一个字节开始时索引值为0，那么第二个数是从索引为4开始读取

??????????? textBox12.Text = BitConverter.ToInt32(b,0).ToString();

??????????? stream.Close();

??????? }

??? }

}

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读取mp3文件信息

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

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namespace WindowsFormsApplication4

{

??? public partial class Form1 : Form

??? {

??????? public Form1()

??????? {

??????????? InitializeComponent();

??????? }

??????? string strPath = string.Empty;

??????? private void button1_Click(object sender,EventArgs e)

??????? {

??????????? //OpenFileDialog控件

??????????? OpenFileDialog ofd = new OpenFileDialog();

??????????? ofd.ShowDialog();

??????????? //将控件中选中的文件路径取出

??????????? strPath= ofd.FileName;

??????????? textBox1.Text = ofd.FileName;

??????????? //创建文件流

??????????? FileStream fs = new FileStream(strPath,FileAccess.Read);

???????????

??????????? //为mp3文件创建的字节数组

??????????? byte[] Tag =new byte[3];

??????????? byte[] Title=new byte[30];

??????????? byte[] Artist = new byte[30];

??????????? byte[] Album = new byte[30];

??????????? byte[] Year = new byte[4];

??????????? byte[] Comment=new byte[28];

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??????????? //将文件定位到后128位

??????????? fs.Seek(-128,SeekOrigin.End);

???????????

??????????? //将文件读到字节数组中

??????????? fs.Read(Tag,3);

??????????? fs.Read(Title,30);

??????????? fs.Read(Artist,30);

??????????? fs.Read(Album,30);

??????????? fs.Read(Year,4);

??????????? fs.Read(Comment,28);

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??????????? //将字节中的信息取出

?????????? if(Encoding.Default.GetString(Tag).Equals("TAG"))

?????????? {

??????????? textBox2.Text=Encoding.Default.GetString(Title);

??????????? textBox3.Text=Encoding.Default.GetString(Artist);

??????????? textBox4.Text=Encoding.Default.GetString(Album);

??????????? textBox5.Text=Encoding.Default.GetString(Year);

??????????? textBox7.Text=Encoding.Default.GetString(Comment);

?????????? }

??????? }

??? }

}

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using System;

using System.IO;

using System.Text;

namespace TagEditor

{

? public class Mp3Info

? {

??? #region Fields

??? privatestring pFilePath;

??? privatestring pTAGID;

??? privatestring pTitle;

??? privatestring pArtist;

??? privatestring pAlbum;

??? privatestring pYear;

??? privatestring pComment;

??? privatestring pGenre;

??? #endregion

??? #region Properties

??? publicstring Title

??? {

????? get { return pTitle; }

????? set { pTitle = value; } } publicstring Artist

??? {

????? get { return pArtist; }

????? set { pArtist = value; }

??? }

??? publicstring Album

??? {

????? get { return pAlbum; }

????? set { pAlbum = value; }

??? }

??? publicstring Year

??? {

????? get { return pYear; }

????? set { pYear = value; }

??? }

??? publicstring Comment { get { return pComment; }

????? set { pComment = value; }

??? }

??? publicstring Genre

??? {

????? get { return pGenre; }

????? set { pGenre = value; }

??? }

??? #endregion

??? #region Constructor(s)

??? public Mp3Info(string file)

??? {

????? pFilePath = file;

??? }

??? #endregion

??? #region Public Methods

??? publicvoid Read()

??? {

????? if (!File.Exists(pFilePath))

????? {

??????? throw new Exception("File: /""+ pFilePath +"/" doen't exists");

????? }

????? using (FileStream fs = File.OpenRead(pFilePath))

????? {

??????? if (fs.Length < 128) { return; }

??????? ID3Tag tag =new ID3Tag();

??????? fs.Seek(-128,SeekOrigin.End);

??????? fs.Read(tag.TAGID,tag.TAGID.Length);

??????? fs.Read(tag.Title,tag.Title.Length);

??????? fs.Read(tag.Artist,tag.Artist.Length);

??????? fs.Read(tag.Album,tag.Album.Length);

??????? fs.Read(tag.Year,tag.Year.Length);

??????? fs.Read(tag.Comment,tag.Comment.Length);

??????? fs.Read(tag.Genre,tag.Genre.Length);

??????? pTAGID = Encoding.Default.GetString(tag.TAGID);

??????? if (pTAGID.Equals("TAG"))

??????? {

????????? pTitle = Encoding.Default.GetString(tag.Title);

????????? pArtist = Encoding.Default.GetString(tag.Artist);

????????? pAlbum = Encoding.Default.GetString(tag.Album);

????????? pYear = Encoding.Default.GetString(tag.Year);

????????? pComment = Encoding.Default.GetString(tag.Comment);

????????? pGenre = Encoding.Default.GetString(tag.Genre);

??????? }

????? }

??? }

??? publicvoid Save()

??? {

? ????if (!File.Exists(pFilePath))

????? {

??????? throw new Exception("File: /""+ pFilePath +"/" doen't exists");

????? }

????? using (FileStream fs = File.OpenWrite(pFilePath))

????? {

??????? ID3Tag tag =new ID3Tag();

??????? Encoding.Default.GetBytes("TAG").CopyTo(tag.TAGID,0);

??????? Encoding.Default.GetBytes(pTitle).CopyTo(tag.Title,0);

??????? Encoding.Default.GetBytes(pArtist).CopyTo(tag.Artist,0);

??????? Encoding.Default.GetBytes(pAlbum).CopyTo(tag.Album,0);

??????? Encoding.Default.GetBytes(pYear).CopyTo(tag.Year,0);

??????? Encoding.Default.GetBytes(pComment).CopyTo(tag.Comment,0);

??????? tag.Genre[0] = Convert.ToByte(pGenre);

??????? fs.Seek(-128,SeekOrigin.End);

??????? fs.Write(tag.TAGID,tag.TAGID.Length);

??????? fs.Write(tag.Title,tag.Title.Length);

??????? fs.Write(tag.Artist,tag.Artist.Length);

??????? fs.Write(tag.Album,tag.Album.Length);

??????? fs.Write(tag.Year,tag.Year.Length);

??????? fs.Write(tag.Comment,tag.Comment.Length);

??????? fs.Write(tag.Genre,tag.Genre.Length);

????? }

??? }

??? #endregion

? }

? class ID3Tag

? {

??? public byte[] TAGID =new byte[3];????? //? 3,? 必须是TAG

??? public byte[] Title =new byte[30];???? //? 30,? 歌曲的标题

??? public byte[] Artist =new byte[30];??? //? 30,? 歌曲的艺术家

??? public byte[] Album =new byte[30];???? //? 30,? 专辑名称

??? public byte[] Year =new byte[4];?????? //? 4,? 出版年代

??? public byte[] Comment =new byte[30];?? //? 30,? 评论

??? public byte[] Genre =new byte[1];????? //? 1,? 种类标识

? }

}