httpwebrequest req = (httpwebrequest)webrequest.create(url);
string s = "要提交的数据";
byte[] requestbytes = system.text.encoding.ascii.getbytes (logininfo);
req.method = "post";
req.contenttype = "application/x-www-form-urlencoded";
req.contentlength = requestbytes.length;
stream requeststream = req.getrequeststream();
requeststream.write(requestbytes,0,requestbytes.length);
requeststream.close();
httpwebresponse res = (httpwebresponse)req.getresponse();
streamreader sr = new streamreader(res.getresponsestream(), system.text.encoding.default);
string backstr = sr.readtoend();
response.write(line);
sr.close();
res.close();
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