Post/Get方式获取Web页面

 

using System.Web;

/// <summary>
/// Post方式请求页面
/// </summary>
/// <param name="url">地址</param>
/// <param name="postData">post数据</param>
/// <returns>响应</returns>
private HttpWebResponse RequestbyPost(string url, string postData)
{
    Uri lcUri = new Uri(url);
    HttpWebRequest loHttp = (HttpWebRequest)WebRequest.Create(lcUri);

    //string lcPostData = HttpUtility.UrlEncode(postData, System.Text.Encoding.Default);
    string lcPostData = postData;
    loHttp.Method = "POST";
    loHttp.ContentType = "application/x-www-form-urlencoded";
    loHttp.KeepAlive = true;
    byte[] lbPostBuffer = System.Text.Encoding.Default
        .GetBytes(lcPostData);
    loHttp.ContentLength = lbPostBuffer.Length;
    Stream loPostData = loHttp.GetRequestStream();
    loPostData.Write(lbPostBuffer, 0, lbPostBuffer.Length);
    loPostData.Close();

    return (HttpWebResponse)loHttp.GetResponse();
}

/// <summary>
/// Post方式请求页面
/// </summary>
/// <param name="url">地址</param>
/// <param name="postData">post数据</param>
/// <returns>响应</returns>
private HttpWebResponse RequestbyPost(string url, string postData, string cookieHeader)
{
    Uri lcUri = new Uri(url);
    HttpWebRequest loHttp = (HttpWebRequest)WebRequest.Create(lcUri);

    //string lcPostData = HttpUtility.UrlEncode(postData, System.Text.Encoding.Default);
    string lcPostData = postData;
    loHttp.Method = "POST";
    loHttp.ContentType = "application/x-www-form-urlencoded";
    CookieContainer cookie1 = new CookieContainer();
    loHttp.CookieContainer = cookie1;
    loHttp.CookieContainer.SetCookies(lcUri, cookieHeader);
    loHttp.KeepAlive = true;
    byte[] lbPostBuffer = System.Text.Encoding.Default
        .GetBytes(lcPostData);
    loHttp.ContentLength = lbPostBuffer.Length;
    Stream loPostData = loHttp.GetRequestStream();
    loPostData.Write(lbPostBuffer, 0, lbPostBuffer.Length);
    loPostData.Close();

    return (HttpWebResponse)loHttp.GetResponse();
}


/// <summary>
/// Get方式请求页面
/// </summary>
/// <param name="url">地址</param>
/// <returns>响应</returns>
private HttpWebResponse RequestbyGet(string url)
{
    Uri lcUri = new Uri(url);
    HttpWebRequest loHttp = (HttpWebRequest)WebRequest.Create(lcUri);
    loHttp.Method = "GET";
    //loHttp.ContentType = "application/x-www-form-urlencoded";

    return (HttpWebResponse)loHttp.GetResponse();
}

/// <summary>
/// Get方式请求页面
/// </summary>
/// <param name="url">地址</param>
/// <param name="cookieHeader">cookieHeader</param>
/// <returns>响应</returns>
private HttpWebResponse RequestbyGet(string url, out string cookieHeader)
{
    Uri lcUri = new Uri(url);
    HttpWebRequest loHttp = (HttpWebRequest)WebRequest.Create(lcUri);
    loHttp.Method = "GET";
    //loHttp.ContentType = "application/x-www-form-urlencoded";
    loHttp.AllowAutoRedirect = true;
    loHttp.CookieContainer = new CookieContainer();
    loHttp.KeepAlive = true;
    HttpWebResponse httpWebResponse = (HttpWebResponse)loHttp.GetResponse();
    cookieHeader = loHttp.CookieContainer.GetCookieHeader(lcUri);

    return httpWebResponse;
}