Silverlight通过WebService上传大文件可拓展为支持断点续传

GOOGLE一遍，没发现网上有现成代码，没办法，只有对一些零散代码进行改造，得到了本文要达到的效果：

1：服务器端采用webservice；

2：SilverLight端可同时选择多个文件；

3：显示每个文件的上传进度，并可拓展为断点续传；

本文源码下载地址：http://download.csdn.net/source/1893588

首先，生成一个SILVERLIGHT应用程序，选择创建WEB。在WEB中新建WEBSERVICE：

 
   view plain 
  
 using System;  
 using System.Collections.Generic;  
using System.Linq;  
using System.Web;  
using System.Web.Services;  
using System.IO;  
using System.Xml.Serialization;  
   
namespace SilverlightApplication6.Web  
 {  
     /// <summary>  
     /// WebService1 的摘要说明  
/// </summary>  
     [WebService(Namespace = "http://tempuri.org/")]  
     [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]  
     [System.ComponentModel.ToolBoxItem(false)]  
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。  
// [System.Web.Script.Services.ScriptService]  
     public class WebService1 : System.Web.Services.WebService  
     {  
   
         [WebMethod]  
         string HelloWorld()  
         {  
             return "Hello World";  
         }  
         /// <summary>  
         /// 大文件上传.<br></br>  
/// 2009-05-12 YJ 定义函数.<br></br>  
/// <p@R_404_6460@m name="fileName">上传文件名</p@R_404_6460@m>  
/// <p@R_404_6460@m name="offSet">偏移</p@R_404_6460@m>  
/// <p@R_404_6460@m name="intoBuffer">每次上传字节数组 单位KB</p@R_404_6460@m>  
/// <returns>上传是否成功</returns>  
bool Upload(string fileName, long offSet,153); background-color:inherit; font-weight:bold">byte[] intoBuffer)  
             //指定上传文件夹+文件名(相对路径)  
             string strPath = "./Resources/" + fileName;  
//将相对路径转换成服务器的绝对路径  
             strPath = Server.MapPath(strPath);  
if (offSet < 0)  
             {  
                 offSet = 0;  
             }  
byte[] buffer = intoBuffer;  
if (buffer != null)  
             {  
                 //读写文件的文件流,支持同步读写也支持异步读写  
                 FileStream filesstream = new FileStream(strPath, FileMode.OpenorCreate, FileAccess.ReadWrite);  
                 filesstream.Seek(offSet, SeekOrigin.Begin);  
                 filesstream.Write(buffer, 0, buffer.Length);  
                 filesstream.Flush();  
                 filesstream.Close();  
                 filesstream.dispose();  
                 return true;  
false;  
         }  
     }  
 }  

客户端代码，后台：

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using System.Collections;

using System.Windows.Data;

using System.Xml;

namespace SilverlightApplication6

{

public partial class MainPage : UserControl

{

#region 类变量

List<FilesClass> fl = new List<FilesClass>();

System.IO.FileStream str = null;

ServiceReference1.WebService1SoapClient x =

new SilverlightApplication6.ServiceReference1.WebService1SoapClient();

FilesClass obj = null;

byte[] by = int iFileCount = 1;

int offset = 0;

double current = 0;

int currentFileNum = 0;

#endregion

#region 事件

public MainPage()

{

InitializeComponent();

private void Mybutton_Click(object sender, RoutedEventArgs e)

OpenFileDialog op = new OpenFileDialog();

op.Multiselect = op.ShowDialog();

if (op.Files != null)

foreach (FileInfo f in op.Files)

{

if (f.Length < 1048576000)

{

FilesClass obj = new FilesClass();

obj.PropFileName = f;

obj.PropNumber = iFileCount.ToString();

fl.Add(obj);

iFileCount++;

}

else

MessageBox.Show("Max file size is 1 MB");

}

MessageBox.Show("Select File");

void MyReset_Click(ottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-style:none; border-right-style:none; border-bottom-style:none; border-left-style:none; border-width:initial; border-color:initial; color:rgb(0, RoutedEventArgs e)

fl.Clear();

iFileCount = 1;

progFile2.Value = 0;

void Upload_Click( UpLoadStart(0);

#region 私有函数

void UpLoadStart(int fileNum)

try

x.UploadCompleted += new EventHandler<SilverlightApplication6.ServiceReference1.UploadCompletedEventArgs>(x_UploadCompleted);

if (fileNum == 0)

currentFileNum = 0;

if (fl.Count > 0 && fl.Count > fileNum)

{

obj = (FilesClass)fl[fileNum];

str = obj.PropFileName.OpenRead();

progFile2.Maximum = (double)(str.Length);

UpLoadStep();

}

catch

throw;

void UpLoadStep()

try

if (str.Length - current > 10240)

offset = 10240;

by = new byte[offset];

str.Read(by, offset);

current = (double)(str.Position);

x.UploadAsync(obj.PropFileName.Name, str.Position - offset, by);

offset = (int)(str.Length - str.Position);

by = byte[offset];

str.Read(by, offset);

void x_UploadCompleted(ottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-style:none; border-right-style:none; border-bottom-style:none; border-left-style:none; border-width:initial; border-color:initial; color:rgb(0, SilverlightApplication6.ServiceReference1.UploadCompletedEventArgs e)

if (e.Result != true)

MessageBox.Show("上传失败，请重新上传！");

this.rre.Text = "" + e.Result.ToString();

progFile2.Value = current;

if (current == str.Length)

x.UploadCompleted -= this.x_UploadCompleted;

str.Flush();

str.Close();

str.dispose();

fl[currentFileNum].PropStatus = "上传成功！";

//BindGrid();

currentFileNum++;

offset = 0;

current = 0;

if (fl.Count > currentFileNum)

UpLoadStart(currentFileNum);

else

//MessageBox.Show("all end!");

return;

UpLoadStep();

}

前台：

<UserControl x:Class="SilverlightApplication6.MainPage"

xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"

xmlns:basics="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

<Grid.RowDeFinitions>

</Grid.RowDeFinitions>

</StackPanel>

</StackPanel>

</Grid>

</UserControl>

Silverlight通过WebService上传大文件可拓展为支持断点续传

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