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：

using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections.Generic; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Linq; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Services; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Xml.Serialization; namespace SilverlightApplication6.Web { /// <summary> /// WebService1 的<a href="/tag/zhaiyao/" target="_blank" class="keywords">摘要</a>说明 /// </summary> [WebService(Namespace = "http://te<a href="/tag/mpu/" target="_blank" class="keywords">mpu</a>ri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.ComponentModel.Tool<a href="/tag/Box/" target="_blank" class="keywords">Box</a>Item(false)] // 若要允许使用 ASP.NET AJAX 从脚本中<a href="/tag/diaoyong/" target="_blank" class="keywords">调用</a>此 Web 服务，请取消对下行的注释。 // [Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services.ScriptService] public class WebService1 : Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Services.WebService { [WebMethod] public string HelloWorld() { return "Hello World"; } /// <summary> /// 大<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>.<br></br> /// 2009-05-12 YJ 定义<a href="/tag/hanshu/" target="_blank" class="keywords">函数</a>.<br></br> /// </summary> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="fileName"><a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a><a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>名</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="offSet">偏移</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="intoBuffer">每次<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>字节数组 单位KB</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <returns><a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>是否成功</returns> [WebMethod] public bool Upload(string fileName,long offSet,byte[] intoBuffer) { //指定<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a><a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>夹+<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>名(相对路径) string strPath = "./Resources/" + fileName; //将相对路径转换成服务器的<a href="/tag/jueduilujing/" target="_blank" class="keywords">绝对路径</a> strPath = Server.MapPath(strPath); if (offSet < 0) { offSet = 0; } byte[] buffer = intoBuffer; if (buffer != null) { //读写<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>的<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>流,<a href="/tag/zhichi/" target="_blank" class="keywords">支持</a>同步读写也<a href="/tag/zhichi/" target="_blank" class="keywords">支持</a>异步读写 FileStream file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream = new FileStream(strPath,FileMode.Ope<a href="/tag/nor/" target="_blank" class="keywords">nor</a>Create,FileAccess.ReadWrite); file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream.Seek(offSet,SeekOrigin.Begin); file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream.Write(buffer,buffer.Length); file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream.Flush(); file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream.Close(); file<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ream.<a href="/tag/dis/" target="_blank" class="keywords">dis</a>pose(); return true; } return false; } } }

      客户端代码，后台：

using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections.Generic; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Linq; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Net; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Controls; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Documents; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Input; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Media; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Media.Animation; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Shapes; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Data; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Xml; namespace SilverlightApplication6 { public partial class MainPage : UserControl { #region <a href="/tag/leibianliang/" target="_blank" class="keywords">类变量</a> List<FilesClass> fl = new List<FilesClass>(); Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO.FileStream str = null; ServiceReference1.WebService1SoapClient x = new SilverlightApplication6.ServiceReference1.WebService1SoapClient(); FilesClass obj = null; byte[] by = null; 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 = true; 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 { Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("Max file size is 1 MB"); } } } else { Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("Select File"); } } private void MyReset_Click(object sender,RoutedEventArgs e) { fl.Clear(); iFileCount = 1; progFile2.Value = 0; } private void Upload_Click(object sender,RoutedEventArgs e) { UpLoadStart(0); } #endregion #region 私有<a href="/tag/hanshu/" target="_blank" class="keywords">函数</a> private 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; } } private 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); } else { offset = (int)(str.Length - str.Position); by = new byte[offset]; str.Read(by,offset); current = (double)(str.Length); x.UploadAsync(obj.PropFileName.Name,by); } } catch { throw; } } void x_UploadCompleted(object sender,SilverlightApplication6.ServiceReference1.UploadCompletedEventArgs e) { if (e.Result != true) { Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>失败，请重新<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>！"); } this.rre.Text = "" + e.Result.ToString(); progFile2.Value = current; if (current == str.Length) { x.UploadCompleted -= this.x_UploadCompleted; str.Flush(); str.Close(); str.<a href="/tag/dis/" target="_blank" class="keywords">dis</a>pose(); fl[currentFileNum].PropStatus = "<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>成功！"; //BindGrid(); currentFileNum++; offset = 0; current = 0; if (fl.Count > currentFileNum) { UpLoadStart(currentFileNum); } else { //Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("all end!"); return; } } UpLoadStep(); } #endregion } }

      前台：

<UserControl x:Class="SilverlightApplication6.MainPage" xmlns:data="clr-namespace:Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Controls;assembly=Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Controls.Data" xmlns:basics="clr-namespace:Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Controls;assembly=Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.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:Ig<a href="/tag/nor/" target="_blank" class="keywords">nor</a>able="d" d:DesignWidth="640" d:DesignHeight="480"> <Grid x:Name="LayoutRoot" Background="YellowGreen" ShowGridLi<a href="/tag/nes/" target="_blank" class="keywords">nes</a>="True" > <Grid.RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>ns> <RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n Height="535"></RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n> <RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n Height="30"></RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n> <RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n Height="35"></RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n> <RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n Height="35"></RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n> </Grid.RowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>ns> <StackPanel Grid.Row="2" Orientation="Horizontal" > <Button Content="选择<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a><a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>" x:Name="MyButton" Width="100" Height="20" Click="Mybutton_Click" Grid.Column="0" FontSize="12"></Button> <Button Content="清除" x:Name="MyReset" Width="100" Height="20" Click="MyReset_Click" Grid.Column="1" FontSize="12"></Button> <Button Content="<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>" x:Name="Upload" Width="100" Height="20" Click="Upload_Click" Grid.Column="2" FontSize="12"></Button> </StackPanel> <StackPanel Grid.Row="1" VerticalAlignment="Center"> <ProgressBar Name="progFile2" Height="20" Width="600"></ProgressBar> </StackPanel> <TextBlock x:Name="rre" Width="200" Grid.Row="0"></TextBlock> </Grid> </UserControl>