我要评论本文实例讲述了c#远程发送和接收数据流生成图片的方法。分享给大家供大家参考。具体如下：
将图片转成数据流方式发送到远程服务，在通过服务器后台程序来接收数据流，再保存成图片存放在需要的地方。
这种方式就类似上传图片功能一样，希望能给一些大家另一种上传图片功能的方法。
发送数据流方法
/// <summary>
/// postbinarydata
/// </summary>
/// <param name="url">要发送的 url 网址</param>
/// <param name="bytes">要发送的数据流</param>
/// <returns></returns>
public string postbinarydata(string url, byte[] bytes)
{
//下面是测试例子
//string url = "http://www.test.com/test.ashx";
//string img = httpcontext.current.server.mappath("../images/test.jpg");
//byte[] bytes = file.readallbytes(img);
httpwebrequest wrequest = (httpwebrequest)webrequest.create(url);
wrequest.contenttype = "multipart/form-data";
wrequest.contentlength = bytes.length;
wrequest.method = "post";
stream stream = wrequest.getrequeststream();
stream.write(bytes, 0, bytes.length);
stream.close();
httpwebresponse wresponse = (httpwebresponse)wrequest.getresponse();
streamreader sreader = new streamreader(wresponse.getresponsestream(), system.text.encoding.utf8);
string str = sreader.readtoend();
sreader.close();
wresponse.close();
return str;
}
接收数据流方法
public void getbinarydata()
{
string imgfile = datetime.now.tostring("yyyymmddhhmmss") + ".jpg";
string filepath = httpcontext.current.server.mappath(imgfile);
//方法一
int lang = httpcontext.current.request.totalbytes;
byte[] bytes = httpcontext.current.request.binaryread(lang);
string content = system.text.encoding.utf8.getstring(bytes);
filestream fstream = new filestream(filepath, filemode.create, fileaccess.write);
binarywriter bw = new binarywriter(fstream);
bw.write(bytes);
bw.close();
fstream.close();
//方法二
bitmap img = new bitmap(httpcontext.current.request.inputstream);
img.save(filepath);
httpcontext.current.response.write("ok");
}
希望本文所述对大家的c#程序设计有所帮助。
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