SilverLight 保存文件

Silverlight不允许用户对本地文件进行操作，虽然提供了独立存储功能，但往往不能满足用户的需求，因此，需要通过别的方式来达到保存数据的目的。

 

案例：

 

一个自动化脚本管理软件，生成case之后，需要将脚本导出保存到本地。

 

实现:

 

Server端根据客户端传递过去的case列表，创建文件，然后生成zip包，完成之后，客户端下载该zip包，所有的脚本都在zip包中。

 

Server端代码：

 

WebService

[WebMethod] public void Createfiles(List<SmartCaseData> listCase) { string path = Server.MapPath("/"); CreateFiles.CreateFile(path,listCase); }

CreateFiles类代码：

public static void CreateFile(string path,List<SmartCaseData> listCase) { if (Directory.Exists(path + "//Test") == false) { Directory.CreateDirectory(path + "//Test"); } for (int i = 0; i < listCase.Count; i++) { SmartCaseData aCase = listCase[i]; FileStream fs = File.Create(path + "//Test//" + aCase.Name+".uws"); Stream st = (Stream)fs; StreamWriter aWriter = new StreamWriter(st); string strCaseScript = ""; for (int j = 0; j < aCase.ChildCaseProcessList.Count; j++) { SmartCaseProcessData aCaseProcess = aCase.ChildCaseProcessList[j]; strCaseScript += aCaseProcess.SaveScript; } strCaseScript = strCaseScript.Replace("/n","/r/n"); aWriter.WriteLine(strCaseScript); aWriter.Close(); st.Close(); } string[] fileList = null; fileList = Directory.GetFiles(path + "//Test"); if (File.Exists(path + "//Output.zip") == true) { File.Delete(path + "//Output.zip"); } foreach (string s in fileList) { AddFil<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Zip(path + "//Output.zip",s); File.Delete(s); } } private const long BUFFER_SIZE = 4096; private static void AddFil<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Zip(string zipFilename,string fil<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Add) { using (Package zip = Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO.Packaging.Package.Open(zipFilename,FileMode.Ope<a href="/tag/nor/" target="_blank" class="keywords">nor</a>Create)) { string destFilename = ".//" + Path.GetFileName(fil<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Add); Uri uri = PackUriHelper.CreatePartUri(new Uri(destFilename,UriKind.Relative)); if (zip.PartExists(uri)) { zip.DeletePart(uri); } PackagePart part = zip.CreatePart(uri,"",Compressio<a href="/tag/nop/" target="_blank" class="keywords">nop</a>tion.<a href="/tag/nor/" target="_blank" class="keywords">nor</a>mal); using (FileStream fileStream = new FileStream(fil<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Add,FileMode.Open,FileAccess.Read)) { using (Stream dest = part.GetStream()) { <a href="/tag/cop/" target="_blank" class="keywords">cop</a>yStream(fileStream,dest); } } } } private static void <a href="/tag/cop/" target="_blank" class="keywords">cop</a>yStream(Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO.FileStream inputStream,Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.IO.Stream outputStream) { long bufferSize = inputStream.Length < BUFFER_SIZE ? inputStream.Length : BUFFER_SIZE; byte[] buffer = new byte[bufferSize]; int bytesRead = 0; long bytesWritten = 0; while ((bytesRead = inputStream.Read(buffer,buffer.Length)) != 0) { outputStream.Write(buffer,bytesRead); bytesWritten += bufferSize; } }

 

客户端声明：

public static SmartTesterServiceSoapClient client = new SmartTesterServiceSoapClient(); client.CreatefilesCompleted+=new EventHandler<Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.ComponentModel.AsyncCompletedEventArgs>(client_CreatefilesCompleted); void client_CreatefilesCompleted(object sender,Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.ComponentModel.AsyncCompletedEventArgs e) { Uri _webPath = new Uri("http://localhost:1376/Output.zip"); HtmlPage.Window.Navigate(_webPath); }

 

调用：

public void MakeScript() { client.CreatefilesAsync(aServerCaseList); }