.net – 使用HttpResponse在Silverlight中上传数据

概述如何在Silverlight中使用异步双向二进制上传和下载数据？ >我需要将我的二进制文件上传到服务器然后> >从服务器获取答案也作为二进制文件 我目前使用的样本是这样的： http://msdn.microsoft.com/en-us/library/system.net.webrequest.begingetresponse.aspx 但是样本以请求开头,我需要从上传开始. 我尝试过使用Web 如何在Silverlight中使用异步双向二进制上传和下载数据？

>我需要将我的二进制文件上传到服务器然后>
>从服务器获取答案也作为二进制文件

我目前使用的样本是这样的：
http://msdn.microsoft.com/en-us/library/system.net.webrequest.begingetresponse.aspx

但是样本以请求开头,我需要从上传开始.

我尝试过使用WebClIEnt,但是我无法按顺序执行上传/下载：Bidirectional use of Webclient for binary

解决方法 AHSX是Go的方式,但特别考虑超过4 MB的文件.

你需要做什么两件事：

>服务器端：将处理收到的数据的Ashx httpHandler：

公共类fileUpload：IhttpHandler
{
public voID ProcessRequest(httpContext context)
    {
        _httpContext = context;

if (context.Request.inputStream.Length == 0)        throw new ArgumentException("No file input");    try    {        // Method that will be populating parameters from httpHandler Request.        Getquerystringparameters();        string uploadFolder = _directory;        string tempfilename = _filename + _tempExtension;        if (_firstChunk)        {            //// Delete temp file            if (file.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempfilename))                file.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempfilename);            //// Delete target file            if (file.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + _filename))                file.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + _filename);        }        using (fileStream fs = file.Open(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempfilename,fileMode.Append))        {            Savefile(context.Request.inputStream,fs);            fs.Close();        }        if (_lastChunk)        {            file.Move(HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempfilename,HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + _filename);        }    }    catch (Exception e)    {        // Todo        // Logger Exception        throw;    }}

}
>将调用它的Silverlight类：

公共类Uploadfile
    {

public voID Upload(Stream streamNewfile,string filename,string dirOnServer =“”)
        {
            this.uploadMode = UploadMode.OpenStream;

this.destinationOnServer = dirOnServer;        this.fileStream = streamNewfile;        this.filename = filename;        this.dataLength = this.fileStream.Length;        long dataToSend = this.dataLength - this.dataSent;        bool isLastChunk = dataToSend <= this.chunkSize;        bool isFirstChunk = this.dataSent == 0;        string DOCTYPE = "document";        var strCurrentHost = HTMLPage.document.documentUri.ToString().Substring(0,HTMLPage.document.documentUri.ToString().LastIndexOf('/'));        UriBuilder httpHandlerUrlBuilder = new UriBuilder(strCurrentHost + "/fileUpload.ashx");        httpHandlerUrlBuilder.query = string.Format("{5}file={0}&offset={1}&last={2}&first={3}&DOCTYPE={4}&destination={6}",filename,this.dataSent,isLastChunk,isFirstChunk,DOCTYPE,string.IsNullOrEmpty(httpHandlerUrlBuilder.query) ? string.Empty : httpHandlerUrlBuilder.query.Remove(0,1) + "&",destinationOnServer);        httpWebRequest webRequest = (httpWebRequest)WebRequest.Create(httpHandlerUrlBuilder.Uri);        webRequest.Method = "POST";        webRequest.BeginGetRequestStream(new AsyncCallback(this.WritetoStreamCallback),webRequest);    }

}

总结

以上是内存溢出为你收集整理的.net – 使用HttpResponse在Silverlight中上传数据全部内容，希望文章能够帮你解决.net – 使用HttpResponse在Silverlight中上传数据所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。