1、不帶參數(shù)的POST請求

public static string Post(string url) ? { ?string result = ""; ?HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); ?req.Method = "POST"; ?HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); ?Stream stream = resp.GetResponseStream(); ?//獲取內(nèi)容 ?using (StreamReader reader = new StreamReader(stream, Encoding.UTF8)) ?{ ?result = reader.ReadToEnd(); ?} ?return result; ? } ?

2、帶參數(shù)的POST請求

public static string Post(string url,Dictionary<string,string> dic) ? { ?string result = ""; ?HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); ?req.Method = "POST"; ?req.ContentType = "application/x-www-form-urlencoded"; ?#region 添加Post 參數(shù) StringBuilder builder = new StringBuilder(); ?int i = 0; ?foreach (var item in dic) ?{ ?if (i > 0) ?builder.Append("&"); ?builder.AppendFormat("{0}={1}", item.Key, item.Value); ?i++; ?} ?byte[] data = Encoding.UTF8.GetBytes(builder.ToString()); ?req.ContentLength = data.Length; ?using (Stream reqStream = req.GetRequestStream()) ?{ ?reqStream.Write(data, 0, data.Length); ?reqStream.Close(); ?} ?#endregion HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); ?Stream stream = resp.GetResponseStream(); ?//獲取響應(yīng)內(nèi)容 ?using (StreamReader reader = new StreamReader(stream, Encoding.UTF8)) ?{ ?result = reader.ReadToEnd(); ?} ?return result; ? } ?

3、不帶參數(shù)的GET請求

public static string Get(string url) ? { ?string result = ""; ?HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); ?HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); ?Stream stream = resp.GetResponseStream(); ?try ?{ ?//獲取內(nèi)容 ?using (StreamReader reader = new StreamReader(stream)) ?{ ?result = reader.ReadToEnd(); ?} ?} ?finally ?{ ?stream.Close(); ?} ?return result; ? }

4、帶參數(shù)的GET請求

public static string Get(string url, Dictionary<string, string> dic) ? { ?string result = ""; ?StringBuilder builder = new StringBuilder(); ?builder.Append(url); ?if (dic.Count > 0) ?{ ?builder.Append("?"); ?int i = 0; ?foreach (var item in dic) ?{ ?if (i > 0) ?builder.Append("&"); ?builder.AppendFormat("{0}={1}", item.Key, item.Value); ?i++; ?} ?} ?HttpWebRequest req = (HttpWebRequest)WebRequest.Create(builder.ToString()); ?//添加參數(shù) ?HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); ?Stream stream = resp.GetResponseStream(); ?try ?{ ?//獲取內(nèi)容 ?using (StreamReader reader = new StreamReader(stream)) ?{ ?result = reader.ReadToEnd(); ?} ?} ?finally ?{ ?stream.Close(); ?} ?return result; ? } ?

5、自定義HTTP請求頭

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); ? req.Method = "GET"; ? req.Headers["Accept-Language"] = "zh-CN,zh;q=0.8"; ? req.Referer = "https://www.baidu.com/"; ? HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); ? Stream stream = resp.GetResponseStream(); ?string result = ""; ?//注意，此處使用的編碼是：gb2312 ?//using (StreamReader reader = new StreamReader(stream, Encoding.Default)) ?using (StreamReader reader = new StreamReader(stream, Encoding.GetEncoding("gb2312"))) ? { ?result = reader.ReadToEnd(); ? } ?

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