代碼里有注釋：

方法一，傳json參數

方法二，傳表單參數

方法三，傳字節流

public void Post(){//方法一，傳json參數var d = new {username = " ",password = " ",grant_type = "password",appcode = " ",companyid = " ",version = "1.0",};var data = JsonConvert.SerializeObject(d);HttpContent httpContent = new StringContent(data);httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");using (HttpClient httpClient = new HttpClient()){string responseJson = httpClient.PostAsync("http://192.168.8.178:1646/token", httpContent).Result.Content.ReadAsStringAsync().Result;}//方法二，傳表單參數FormUrlEncodedContent formContent = new FormUrlEncodedContent(new Dictionary<string, string>(){{"username"," " },{"password"," " },{"grant_type","password" },{"appcode"," " },{"companyid"," " },{"version","1.0" },});using (HttpClient httpClient = new HttpClient()){httpClient.DefaultRequestHeaders.Add("User-Agent", @"Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");httpClient.DefaultRequestHeaders.Add("Accept", @"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");HttpResponseMessage response = httpClient.PostAsync("http://192.168.8.178:1646/token", formContent).Result;if (response.IsSuccessStatusCode){string result = response.Content.ReadAsStringAsync().Result;}}///方法三，傳字節流 using (HttpClient http = new HttpClient()){http.DefaultRequestHeaders.Add("User-Agent", @"Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)");http.DefaultRequestHeaders.Add("Accept", @"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");HttpResponseMessage message = null;string xx = @"{ ""username"":"" "",""password"":"" "",""grant_type"":""password"",""appcode"":"" "",""companyid"":"" "",""version"":""1.0""}";using (Stream dataStream = new MemoryStream(Encoding.Unicode.GetBytes(xx) ?? new byte[0])){using (HttpContent content = new StreamContent(dataStream)){content.Headers.Add("Content-Type", "application/x-www-form-urlencoded");var task = http.PostAsync("http://192.168.8.178:1646/token", content);message = task.Result;}}if (message != null && message.StatusCode == System.Net.HttpStatusCode.OK){using (message){string result = message.Content.ReadAsStringAsync().Result;}}}}

總結

以上是生活随笔為你收集整理的HttpClient 调用WebAPI时—传参的三种方式(ASP.NET MVCCORE均适用)的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。