C#後臺 Get、Post 網絡請求
阿新 • • 發佈：2018-06-19
urn lse bre 示例 之間 close 開始 encode b- 
1.Post、Get請求
public static string HttpPost(string url, string param) { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.Accept = "Post提交*/*"; request.Timeout = 15000; request.AllowAutoRedirect = false; StreamWriter requestStream = null; WebResponse response = null; string responseStr = null; try { requestStream = new StreamWriter(request.GetRequestStream()); requestStream.Write(param); requestStream.Close(); response= request.GetResponse(); if (response != null) { StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8); responseStr = reader.ReadToEnd(); reader.Close(); } }catch (Exception) { throw; } finally { request = null; requestStream = null; response = null; } return responseStr; }
public static string HttpPost(string url, string param) { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.Accept = "*/*"; request.Timeout = 15000; request.AllowAutoRedirect = false; StreamWriter requestStream = null; WebResponse response = null; string responseStr = null; try { requestStream = new StreamWriter(request.GetRequestStream()); requestStream.Write(param); requestStream.Close(); response = request.GetResponse(); if (response != null) { StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8); responseStr = reader.ReadToEnd(); reader.Close(); } } catch (Exception) { throw; } finally { request = null; requestStream = null; response = null; } return responseStr; }Get提交
微信公眾平臺調用post提交數據 有些需要傳遞json格式的數據如果不是json格式的數據可能會報錯
2.簡單的示例代碼
/// <summary> /// 將字典類型序列化為json字符串 /// </summary> /// <typeparam name="TKey">字典key</typeparam> /// <typeparam name="TValue">字典value</typeparam> /// <param name="dict">要序列化的字典數據</param> /// <returns>json字符串</returns> public static string SerializeDictionaryToJsonString<TKey, TValue>(Dictionary<TKey, TValue> dict) { if (dict.Count == 0) return ""; string jsonStr = JsonConvert.SerializeObject(dict); return jsonStr; }簡單的將字典類型序列化為json字符串
public ActionResult Index() { Dictionary<string, string> list = new Dictionary<string, string>(); list.Add("begin_date", "2014-12-07"); list.Add("end_date", "2014-12-07"); //用戶分析數據接口 開始沒有傳遞json格式的數據 總是報日期格式不正確 簡單的寫了個json轉換的 var str = Utils.HttpPost("https://api.weixin.qq.com/datacube/getusersummary?access_token=xxxxxxxx", SerializeDictionaryToJsonString(list)); return View(); }用戶分析數據接口
3.獲取網頁信息--可以做到一個文件多出使用（後臺結果公告內容，通過獲取結果公告內容抓取到前臺顯示）
#region 獲取網頁信息 #region 根據URL地址獲取信息GET public static String GetResult(string url) { return GetResult(url, Encoding.Default); } #endregion #region 根據URL地址獲取對應編碼信息 public static String GetResult(string url, Encoding encoding) { try { var webRequest = (HttpWebRequest)WebRequest.Create(url); //獲取響應結果 var webResponse = (HttpWebResponse)webRequest.GetResponse(); //獲取響應流 Stream stream = webResponse.GetResponseStream(); using (StreamReader streamReader = new StreamReader(stream, encoding)) { string result = String.Empty; result = streamReader.ReadToEnd(); streamReader.Close(); webResponse.Close(); webRequest.Abort(); return result; } } catch (Exception ex) { return "-1"; //return ex.Message.Length > 100 ? ex.Message.Substring(0, 100) : ex.Message; } } #endregion #endregion獲取網頁信息
/// <summary> /// 獲取並截取HTML源碼 /// </summary> /// <param name="strUrl"></param> /// <returns></returns> public static string GetUrlAndCutSourceHtml(string strUrl) { string strTemp = Common.GetResult(strUrl, System.Text.Encoding.GetEncoding("utf-8")); if (!strTemp.Equals("-1")) { strTemp = strTemp.Substring(strTemp.IndexOf("<!--begin-->")); strTemp = strTemp.Substring(0, strTemp.IndexOf("<!--end-->")); } return strTemp; }獲取之間的內容
<body>
<form>
<!--begin-->
<div>
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
顯示的內容
</div>
<!--end-->
</form>
</body>
</html>
html頁面
C#後臺 Get、Post 網絡請求