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：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
//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));
|
/// <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)