WebApi(6) 后台C#调用WebApi

https://www.cnblogs.com/cxd1008/p/6640015.html

今天来写一下后台C#代码如何访问webapi 这里使用HttpClient方法访问webapi也是很常用的方法。

因为我在是webapi项目里直接写的，为了方便就直接读取了当前地址，代码包括 webapi的所有用法【Getstring GetClass GetListClass Post put Delete】。

代码如下：

 

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//后台client方式GET提交 HttpClient myHttpClient = new HttpClient(); //提交当前地址的webapi string url = "http://" + System.Web.HttpContext.Current.Request.Url.Host + ":" + System.Web.HttpContext.Current.Request.Url.Port.ToString(); myHttpClient.BaseAddress = new Uri(url); //GET提交 返回string HttpResponseMessage response = myHttpClient.GetAsync("api/ApiDemo/Get2").Result; string result = ""; if (response.IsSuccessStatusCode) {     result = response.Content.ReadAsStringAsync().Result; } //return Content(JsonConvert.SerializeObject(result));   Product product = null; //GET提交 返回class response = myHttpClient.GetAsync("api/ProductsAPI/GetProduct/1").Result; if (response.IsSuccessStatusCode) {     product = response.Content.ReadAsAsync<Product>().Result; } //return Content (JsonConvert.SerializeObject(product));   //put 提交 先创建一个和webapi对应的类            var content = new FormUrlEncodedContent(new Dictionary<string, string>()     {         {"Id","2"},         {"Name","Name:"+DateTime.Now.ToString() },         {"Category","111"},         {"Price","1"}      }); response = myHttpClient.PutAsync("api/ProductsAPI/PutProduct/2", content).Result; if (response.IsSuccessStatusCode) {     result = response.Content.ReadAsStringAsync().Result; }     //post 提交 先创建一个和webapi对应的类 content = new FormUrlEncodedContent(new Dictionary<string, string>()     {         {"Id","382accff-57b2-4d6e-ae84-a61e00a3e3b5"},         {"Name","Name" },         {"Category","111"},         {"Price","1"}      }); response = myHttpClient.PostAsync("api/ProductsAPI/PostProduct", content).Result; if (response.IsSuccessStatusCode) {     result = response.Content.ReadAsStringAsync().Result; } //delete 提交 response = myHttpClient.DeleteAsync("api/ProductsAPI/DeleteProduct/1").Result; if (response.IsSuccessStatusCode) {     result = response.Content.ReadAsStringAsync().Result; }   //GET提交 返回List<class> response = myHttpClient.GetAsync("api/ProductsAPI/GetAllProducts").Result; List<Product> listproduct = new List<Models.Product>(); if (response.IsSuccessStatusCode) {     listproduct = response.Content.ReadAsAsync<List<Product>>().Result; } return Content(JsonConvert.SerializeObject(listproduct));

　　

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/// <summary> /// url请求 /// </summary> /// <param name="type"></param> /// <param name="paramData"></param> /// <returns></returns> private static string WebRequest(string method, string type, string paramData) {     string apiUrl = "http://" + ConfigHelper.GetBaseUrl("url") + "/Session";     apiUrl = apiUrl.EndsWith("/") ? apiUrl : apiUrl + "/";       string postUrl = string.Empty;     if (type == "Get" || type == "Delete")     {         postUrl = apiUrl + method + "?" + paramData;     }     else     {         postUrl = apiUrl + method;     }     LogWriter.ToDebug(postUrl);     string ret = string.Empty;       byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(paramData);     System.Net.HttpWebRequest webReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(new Uri(postUrl));     webReq.Method = type;     switch (type)     {         case "Post":             {                 webReq.ContentLength = byteArray.Length;                 webReq.ContentType = "application/json";                 System.IO.Stream newStream = webReq.GetRequestStream();                 newStream.Write(byteArray, 0, byteArray.Length); //写入参数                 newStream.Close();             }             break;         case "Put":             {                 webReq.ContentLength = byteArray.Length;                 webReq.ContentType = "application/x-www-form-urlencoded";                 System.IO.Stream newStream = webReq.GetRequestStream();                 newStream.Write(byteArray, 0, byteArray.Length); //写入参数                 newStream.Close();             }             break;     }       using (System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)webReq.GetResponse())     {         System.IO.StreamReader sr = new System.IO.StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);         ret = sr.ReadToEnd();         sr.Close();     }       return ret; }

　　

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c#调用webapi post list 折腾了半天，最后用这种方式解决了。上面那种还是不会。 //请求路径 string url = "http://localhost:3063/api/Blog/SetTopNo";   //定义request并设置request的路径 WebRequest request = WebRequest.Create(url); request.Method = "post";   //初始化request参数 string postData = "[{\"TopNo\": \"22\",\"CategoryId\": \"1\",\"BlogId\": \"1723\"}, {\"TopNo\": \"12\",\"CategoryId\": \"2\",\"BlogId\":\"1723\"}]";   //设置参数的编码格式，解决中文乱码 byte[] byteArray = Encoding.UTF8.GetBytes(postData);   //设置request的MIME类型及内容长度 request.ContentType = "application/json"; request.ContentLength = byteArray.Length;   //打开request字符流 Stream dataStream = request.GetRequestStream(); dataStream.Write(byteArray, 0, byteArray.Length); dataStream.Close();   //定义response为前面的request响应 WebResponse response = request.GetResponse();

　　

问题：c#后台调用webapi接口，后面用webrequest虽然解决了传复杂类型的问题，但是写起来麻烦，还是想用httpclient，经过打断点查看header,查阅资料，加班终于搞定

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var postData = new { Title = title, Content = JsonConvert.SerializeObject(contentJson), PublishFlag = "0",//发布标记:1已发布，0未发布 跟游记保持一至 LongArticle = longArticle,//复杂类型 }; var content = new StringContent(JsonConvert.SerializeObject(postData));//用的StringContent 之前用的FormUrlEncodedContent content.Headers.ContentType = new MediaTypeHeaderValue("application/json");//关键   HttpClient httpClient = GetUseHttpClient(); //编辑，新增接口不一样 var url = "api/Blog/PublishLongArticle"; if (request.blogid!=null&&request.blogid.Trim().Length > 0) { url = "api/Blog/EditLongArticle"; } var apiResponse = httpClient.PostAsync(url, content).Result;   if (apiResponse.IsSuccessStatusCode)

　　

 

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