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webapistring 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stringHttpResponseMessage 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classresponse = 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)); |
/// <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;
}
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
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)
