HTTP協議中，向服務器傳遞參數的幾個位置是： HTTP Header / GET的字符串 / POST中間的Body
下面的示例代碼演示如何簡單的POST數據到服務器.
//?發送請求
string?requestBody?=?string.Format("{0}={1}&{2}={3}&{4}={5}&{6}={7}&{8}={9}"
????,?HttpUtility.UrlEncode("version_id",?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode(m_VersionNo,?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode("merchant_id",?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode(m_MerchantID,?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode("verifystring",?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode(hashStr.ToString().ToLower(),?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode("order_date",?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode(m_OrderDate,?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode("order_id",?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode(m_OrderID,?Encoding.GetEncoding("GB2312"))
????,?HttpUtility.UrlEncode("retmode",?Encoding.GetEncoding("GB2312"))
????,?string.Empty
????);
HttpWebRequest?request?=?(HttpWebRequest)HttpWebRequest.Create(m_GatewayURL);
request.Method?=?"POST";
request.KeepAlive?=?false;
request.ContentType?=?"application/x-www-form-urlencoded";
byte[]?aryBuf?=?Encoding.GetEncoding("GB2312").GetBytes(requestBody);
request.ContentLength?=?aryBuf.Length;
using(Stream?writer?=?request.GetRequestStream())
{
????writer.Write(aryBuf,?0,?aryBuf.Length);
????writer.Close();
????writer.Dispose();
}
string?ret?=?string.Empty;
using?(WebResponse?response?=?request.GetResponse())
{
????StreamReader?reader?=?new?StreamReader(?response.GetResponseStream()
????????,?Encoding.GetEncoding("GB2312")
????????);???
????ret?=?reader.ReadToEnd();
????reader.Close();
????reader.Dispose();
}
ContentType有3種方式可選，這里使用URLEncoded方式，比較簡單方便