c# winform 訪問WebServices （通過Http Post方式）
- 2020 年 3 月 26 日
- 筆記
第一步、編寫WebServices服務方法
1 [WebMethod] 2 public void PostJson(string str, string bb) 3 { 4 Dictionary<string, object> DictResult = new Dictionary<string, object>(); 5 IList<Dictionary<string, string>> list = new List<Dictionary<string, string>>(); 6 /*此處提供的只是示例，實際項目中，按照具體業務*/ 7 for (int ii = 0; ii < 5; ii++) 8 { 9 Dictionary<string, string> dict = new Dictionary<string, string>(); 10 dict.Add("str", str); 11 dict.Add("bb", bb); 12 list.Add(dict); 13 } 14 /*此處提供的只是示例，實際項目中，按照具體業務*/ 15 if (str == "11") 16 { 17 DictResult.Add("Code", "0"); 18 DictResult.Add("Msg", "訪問成功"); 19 DictResult.Add("Result", list); 20 } 21 else 22 { 23 DictResult.Add("Code", "-1"); 24 DictResult.Add("Msg", "訪問失敗"); 25 DictResult.Add("Result", null); 26 } 27 28 Tools.ConvertToJson(DictResult); 29 }
Web方法返回的內容
第二步、編寫Winform客戶端的訪問程式碼
1 string HttpPost(string URL, string Para) 2 { 3 // 創建HttpWebRequest對象 4 HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(URL); 5 httpRequest.Method = "POST"; 6 httpRequest.ContentType = "application/x-www-form-urlencoded"; 7 byte[] bytes = Encoding.UTF8.GetBytes(Para); 8 using (Stream reqStream = httpRequest.GetRequestStream()) 9 { 10 reqStream.Write(bytes, 0, bytes.Length); 11 reqStream.Flush(); 12 } 13 try 14 { 15 using (HttpWebResponse myResponse = (HttpWebResponse)httpRequest.GetResponse()) 16 { 17 StreamReader sr = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8); 18 string responseString = sr.ReadToEnd(); 19 return responseString; 20 } 21 } 22 catch (WebException webex) 23 { 24 var res = (HttpWebResponse)webex.Response; 25 StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8); 26 string str = sr.ReadToEnd(); 27 return str; 28 } 29 }
第三步、設計調用介面
第四步、執行調用方法
1 private void button1_Click(object sender, EventArgs e) 2 { 3 string url = "http://localhost:6029/TestServ.asmx/PostJson"; 4 string Para = "str=11&bb=AA"; 5 textBox1.Text = HttpPost(url, Para); 6 }
第五步、顯示執行結果
