Silverlight上传图片到网站目录并显示

1.Silverlight只能显示网站项目目录的ClientBin目录下的图片，也可以在ClientBin目录下建子文件夹进行显示
   ，例如ClientBin/images目录

2.Silverlight上传图片一种方法是使用WebClient,服务端使用一般处理程序.ashx

 

参考代码:

*******************************Silverlight客户端代码*****************************************************
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.Windows.Navigation;
using System.Windows.Media.Imaging;
using System.IO;

namespace Silverligh图片相册
{
    public partial class AddProduct : Page
    {
        public string mStrImageFileName = "";
        public FileInfo mObjImageFileInfo = null;
        private wcfMain.IwcfMainClient client = null;
        OpenFileDialog dlg = null;
       
        public AddProduct()
        {
            InitializeComponent();
            client = ServerManager.GetPox();
            client.AddProductCompleted += new EventHandler<wcfMain.AddProductCompletedEventArgs>(client_AddProductCompleted);
        }

        void client_AddProductCompleted(object sender, wcfMain.AddProductCompletedEventArgs e)
        {
            if (e.Error == null)
            {
                Dictionary<string, string> dicGet = e.Result;
                if (dicGet["Result"] == "OK")
                {
                    MessageBox.Show("添加产品成功!");
                    mStrImageFileName = "";
                    mObjImageFileInfo = null;
                    txtProductName.Text = "";
                    imgSource.Source = new BitmapImage(
                        new Uri("", UriKind.Relative));
                }
                else
                {
                    MessageBox.Show("添加产品失败!" + dicGet["Result"]);
                }
            }
            else
            {
                MessageBox.Show(e.Error.InnerException.ToString());
            }

        }

        // 当用户导航到此页面时执行。
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        private void btnExit_Click(object sender, RoutedEventArgs e)
        {
            SessionManager.Session["Login"] = "N";
            this.Content = new ShowPicMain();
        }

        private void btnSelImage_Click(object sender, RoutedEventArgs e)
        {
            //这里在客户端显示图片，并显示在Image控件中
            dlg = new OpenFileDialog();
            dlg.Multiselect = false;
            dlg.Filter = "JPG 图片 (*.jpg)|*.jpg|PNG 图片 (*.png)|*.png";
            bool? result = dlg.ShowDialog();
            if (result != null && result == true)
            {
                mStrImageFileName = dlg.File.Name;
                mObjImageFileInfo = dlg.File;
                BitmapImage image = new BitmapImage();
                image.SetSource(dlg.File.OpenRead());
                imgSource.Source = image;
                dlg.File.OpenRead().Close();
            }
        }

        #region 关键代码，使用WebClient调用一般处理程序，上传图片 
        private void uploadImage(string fileName, Stream data)
        {
            Uri uri = new Uri(string.Format("/UploadImageHandler.ashx?filename={0}", fileName), UriKind.Relative);

            WebClient client = new WebClient();
            client.OpenWriteCompleted += delegate(object s, OpenWriteCompletedEventArgs e)
            {
                uploadData(data, e.Result);
                e.Result.Close();
                data.Close();
            };
            client.OpenWriteAsync(uri);
        }
        #endregion

        private void uploadData(Stream input, Stream output)
        {
            //这里要注意，传入的输入流不能是关闭的，否则不能成功上传图片
            byte[] buffer = new byte[4096];
            int bytes;

            while ((bytes = input.Read(buffer, 0, buffer.Length)) != 0)
            {
                output.Write(buffer, 0, bytes);
            }
        }

        private void btnAddProduct_Click(object sender, RoutedEventArgs e)
        {
            if (txtProductName.Text!="")
            {
                client.AddProductAsync(txtProductName.Text, "/images/" + mStrImageFileName);
            }
            else
            {
                MessageBox.Show("产品名称和图片不能为空!");
            }
        }

        private void btnUpload_Click(object sender, RoutedEventArgs e)
        {
            if (mStrImageFileName != "" && mObjImageFileInfo != null)
            {
                uploadImage(mStrImageFileName, mObjImageFileInfo.OpenRead());
                MessageBox.Show(string.Format("上传成功！{0}",
                    mStrImageFileName));
            }
        }

        private void btnReturn_Click(object sender, RoutedEventArgs e)
        {
            this.Content = new ShowPicMain();
        }

    }
}

*******************************一般处理程序服务端代码*****************************************************
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;

namespace Silverligh图片相册.Web
{
    /// <summary>
    /// UploadImageHandler 的摘要说明
    /// </summary>
    public class UploadImageHandler : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            //关键代码，把图片存储在网站的ClientBin/images目录下
            context.Response.ContentType = "text/plain";
            string filename = context.Request.QueryString["filename"].ToString();
            string strSaveFileName = context.Server.
                MapPath("~/ClientBin/images/" + filename);
            if (File.Exists(strSaveFileName))
            {
                File.Delete(strSaveFileName);
            }
            using(FileStream fs = File.Create(strSaveFileName))
            {
                SaveImage(context.Request.InputStream, fs);
            }

        }

        private void SaveImage(Stream stream, FileStream fs)
        {
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)
            {
                fs.Write(buffer, 0, bytesRead);
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}