C# HTTP POST GET

C# HTTP POST GET 示例代码

/// <summary>
/// POST
/// </summary>
/// <returns></returns>
public static string HttpConnectToServer(string ServerPage, string strXml, string contentType = "text/xml")
{
    //string postData = "arg0=" + strXml;
    string postData = strXml;

    byte[] dataArray = Encoding.UTF8.GetBytes(postData);
    //创建请求
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(ServerPage);
    request.Method = "POST";
    request.ContentLength = dataArray.Length;
    request.ContentType = contentType;
    //创建输入流
    Stream dataStream = null;
    try
    {
        dataStream = request.GetRequestStream();
    }
    catch (Exception ex)
    {
        return ex.Message;//连接服务器失败
    }

    //发送请求
    dataStream.Write(dataArray, 0, dataArray.Length);
    dataStream.Close();
    //读取返回消息
    string res = string.Empty;
    try
    {
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
        res = reader.ReadToEnd();
        reader.Close();
    }
    catch (Exception ex)
    {
        return null;//连接服务器失败
    }
    return res;
}



/// <summary>
/// GET
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public static string HttpGet(string url)
{
    try
    {
        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
        request.Method = "GET";
        request.UserAgent = "Mozilla/4.0";
        request.KeepAlive = true;
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
        string result = reader.ReadToEnd();
        //当Close与Dispose同时存在时,请使用Dispose释放资源
        //Close负责关闭流,但不一定会释放资源
        reader.Close();
        response.Close();
        reader.Dispose();
        return result;
    }
    catch (Exception ex)
    {
        return null;//连接服务器失败
    }
    return string.Empty;
}