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

转自：http://blog.csdn.net/luminji/article/details/4987539

      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 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]
        public string HelloWorld()
        {
            return "Hello World";
        }

        /// <summary>
        /// 大文件上传.<br></br>
        /// 2009-05-12 YJ 定义函数.<br></br>
        /// </summary>
        /// <param name="fileName">上传文件名</param>
        /// <param name="offSet">偏移</param>
        /// <param name="intoBuffer">每次上传字节数组 单位KB</param>
        /// <returns>上传是否成功</returns>
        [WebMethod]
        public bool Upload(string fileName, long offSet, 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;
            }
            return false;
        }


    }
}

客户端代码，后台：

using System;
using System.Collections.Generic;
using System.Linq;
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.IO;
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 = 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
                    {
                        MessageBox.Show("Max file size is 1 MB");
                    }
                }
            }
            else
            {
                MessageBox.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 私有函数
        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, 0, 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, 0, offset);
                    current = (double)(str.Length);
                    x.UploadAsync(obj.PropFileName.Name, str.Position - offset, by);
                }
            }
            catch
            {
                throw;
            }
        }

        void x_UploadCompleted(object sender, 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();
        }
        #endregion

    }
}

 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 x:Name="LayoutRoot" Background="YellowGreen" ShowGridLines="True" >
        <Grid.RowDefinitions>
            <RowDefinition Height="535"></RowDefinition>
            <RowDefinition Height="30"></RowDefinition>
            <RowDefinition Height="35"></RowDefinition>
            <RowDefinition Height="35"></RowDefinition>
        </Grid.RowDefinitions>
        <StackPanel Grid.Row="2" Orientation="Horizontal" >
            <Button Content="选择上传文件" 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="上传" 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>