運行時建立HTTP請求及請求的處理

1、發起請求

下面這個方法的作用就是接收要發送的資料及資料要發送到的URL，然後返迴響應資料

 

    protected string SendRequest(string data,string url)
    {
        WebRequest req = WebRequest.Create(url);
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
byte[] sendBytes = Encoding.UTF8.GetBytes(data);
        req.ContentLength = sendBytes.Length;
        Stream reqStream = req.GetRequestStream();
        reqStream.Write(sendBytes, 0, sendBytes.Length);
        reqStream.Close();

        WebResponse res = req.GetResponse();
        Stream resStream = res.GetResponseStream();
        StreamReader sr = new StreamReader(resStream, Encoding.UTF8);
string resData = sr.ReadToEnd();
        sr.Close();
        resStream.Close();
return resData;
    }

 

使用樣本：

 

    protected void btnSubscribe_Click(object sender, EventArgs e)
    {
string FileName = Server.MapPath("訂購.xml");
        FileStream fs = new FileStream(FileName, FileMode.Open);
        StreamReader sr = new StreamReader(fs);
string ReqData = sr.ReadToEnd();
        sr.Close();
        fs.Close();
        txtResponse.Text = SendRequest(ReqData, "http://localhost:2102/InterWeb/subscribe.htm");
    }

 

2、處理請求
　　接收要簡單一些，用下面這兩句代碼就可以了

 

            StreamReader sr = new StreamReader(Request.InputStream);
            ReqData = sr.ReadToEnd();

 

 

3、總結

這種處理方式一般會用在一些對外的介面等的開發中，以XML傳遞通訊協定資料。