Silverlight上传图片到网站目录并显示

概述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***

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,buffer.Length)) != 0)
            {
                output.Write(buffer,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,buffer.Length)) != 0)
            {
                fs.Write(buffer,bytesRead);
            }
        }

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

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