silverlight上传文件

silverlight不支持本地文件创建等相关操作，上传文件时可以先把文件读入字节数组，然后调用web服务实现上传。

具体实现如下：

silverlight端代码：

private void button1_Click(object sender,RoutedEventArgs e) { OpenFileDialog dialog = new OpenFileDialog(); if (dialog.ShowDialog().Value) { // 选择<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>的<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a> FileInfo file = dialog.File; Stream stream = file.OpenRead(); stream.Position = 0; byte[] buffer = new byte[stream.Length + 1]; //将<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>读入字节数组 stream.Read(buffer,buffer.Length); String fileExtention = file.Extension; //<a href="/tag/diaoyong/" target="_blank" class="keywords">调用</a>服务<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a> ServiceReference1.UploadFileSoapClient upfile = new UploadFileSoapClient(); upfile.UploadfileAsync(buffer,fileExtention); upfile.UploadfileCompleted += new EventHandler<UploadfileCompletedEventArgs>(upfile_UploadfileCompleted); } else { Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("请选择<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>！"); } } void upfile_UploadfileCompleted(object sender,UploadfileCompletedEventArgs e) { Message<a href="/tag/Box/" target="_blank" class="keywords">Box</a>.Show("<a href="/tag/shangchuan/" target="_blank" class="keywords">上传</a>成功！"); }

webservice代码：

[WebMethod] public int Uploadfile(byte[] FileByte,string FileExtention) { //<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>存放路径 string filepath = string.Format(@"D:/example{0}",FileExtention); //如果<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>已经存在则<a href="/tag/shanchu/" target="_blank" class="keywords">删除</a> if (File.Exists(filepath)) File.Delete(filepath); //<a href="/tag/chuangjianwenjian/" target="_blank" class="keywords">创建文件</a>流实例，用于写入<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a> FileStream stream = new FileStream(filepath,FileMode.CreateNew); //写入<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a> stream.Write(FileByte,FileByte.Length); stream.Close(); return FileByte.Length; }