上一讲中介绍了使用HttpClient如何去调用一个标准的Web Api接口，并且我们知道了Post,Put方法只能有一个FromBody参数，再有多个参数时，上讲提到，需要将它封装成一个对象进行传递，而这讲主要围绕这个话题来说，接口层添加一个新类User_Info，用来进行数据传递，而客户端使用网页ajax和控制台HttpClient的方式分别进行实现，Follow me！
下面定义一个复杂类型对象
public class User_Info
{
public int Id { get; set; }
public string Name { get; set; }
public string Info { get; set; }
}
下面修改上次的api部分，让它对这个对象进行操作
[CorsAttribute("http://localhost:3321")]
public class RegisterController : ApiController
{
public static List<User_Info> Model = new List<User_Info>()
{
new User_Info{Id=,Name="zzl",Info="zzl是楼主"},
new User_Info{Id=,Name="zhz",Info="zhz是zzl的儿子"},
new User_Info{Id=,Name="zql",Info="zql是zzl的妻子"},
new User_Info{Id=,Name="bobo",Info="bobo是zzl的朋友"}
};
// GET api/values
public IEnumerable<User_Info> Get()
{
return Model;
}
// GET api/values/5
public User_Info Get(int id)
{
var entity = Model.FirstOrDefault(i => i.Id == id);
return entity;
}
// GET api/values/5?leval=1
public HttpResponseMessage Get(int id, int leval)
{
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("<em style='color:red'>成功响应(id,level)</em>", System.Text.Encoding.UTF8, "text/html")
};
}
// POST api/values
public HttpResponseMessage Post([FromBody]User_Info value)
{
Model.Add(new User_Info
{
Id = value.Id,
Info = value.Info,
Name = value.Name,
});
//用户登陆相关
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("添加数据成功,用户ID：" + value.Id, System.Text.Encoding.UTF8, "text/plain")
};
}
// PUT api/values?userid=5
public HttpResponseMessage Put(int userid, [FromBody]User_Info value)
{
var entity = Model.FirstOrDefault(i => i.Id == userid);
entity.Info = value.Info;
entity.Name = value.Name;
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("修改数据成功,主键：" + userid + ",对象：" + value.Name)
};
}
// DELETE api/values/5
public HttpResponseMessage Delete(int id)
{
Model.Remove(Model.FirstOrDefault(i => i.Id == id));
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("删除数据成功")
};
}
而最关键的地方还是在各个客户端调用的时候，首先，你不能指望客户端去引用你的程序集，因为，不能平台无法实现这种引用（java & c#,js & C#,php & c#)，所以，在调用时需要有它们各自的方法，而JS的ajax调用时，直接使用json对象即可，键名对象
实体的属性，在使用HttpClient时，直接为FormUrlEncodedContent对象赋一个键值对的集合即可，下面分别介绍一下
HTML的JS实现
$.ajax({
url: "http://localhost:52824/api/register",
type: "POST",
data: { Id: 5, Name: '新来的', Info: '大家好' },//这里键名称必须为空，多个参数请传对象，api端参数名必须为value
success: function (data) {
console.log("post:" + data);
}
});
$.ajax({
url: "http://localhost:52824/api/register",
type: "GET",
success: function (data) {
for (var i in data) {
console.log(data[i].Id + " " + data[i].Name);
}
}
});
结果截图
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DJSupJV6qQUk449VUppYNSnlp2oqLOGK1Ulcgbe2uBXwQ0mmJS3wMAjmD5etJGS688Wv8F/0opKYXUVVUZo5XSVWUqrav28n5zLSeZN8GqeqeQNwAwhxXUk55S9blSRT34sWmgldKqKOx/za0DNmFs7MR506xnYIox5A0AzGIV9aSnVH22UeRSRCtVef/Vk7SSqqpHOe39abZR7361ekQTT/Ev6fCHPABwXCdTT9oFi42JnpNg7V98NqOU9B+KAgDWjefZAAByIG8AADmQNwCAHMgbAEAO1JMGAOTA+AYAkAN5AwDIgbwBAOTwf6NZ86DAqT09AAAAAElFTkSuQmCC" alt="" />
Console程序中使用HttpClient对象进行实现
/// <summary>
/// HttpClient实现Post请求
/// </summary>
static async void dooPost()
{
string url = "http://localhost:52824/api/register";
//设置HttpClientHandler的AutomaticDecompression
var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
//创建HttpClient（注意传入HttpClientHandler）
using (var http = new HttpClient(handler))
{
//使用FormUrlEncodedContent做HttpContent
var content = new FormUrlEncodedContent(new Dictionary<string, string>()
{ {"Id","6"},
{"Name","添加zzl"},
{"Info", "添加动作"}//键名必须为空
}); //await异步等待回应 var response = await http.PostAsync(url, content);
//确保HTTP成功状态值
response.EnsureSuccessStatusCode();
//await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
Console.WriteLine(await response.Content.ReadAsStringAsync());
} }
/// <summary>
/// HttpClient实现Get请求
/// </summary>
static async void dooGet()
{
string url = "http://localhost:52824/api/register?id=1";
//创建HttpClient（注意传入HttpClientHandler）
var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip }; using (var http = new HttpClient(handler))
{
//await异步等待回应
var response = await http.GetAsync(url);
//确保HTTP成功状态值
response.EnsureSuccessStatusCode(); //await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
Console.WriteLine(await response.Content.ReadAsStringAsync());
}
}
/// <summary>
/// HttpClient实现Put请求
/// </summary>
static async void dooPut()
{
var userId = 1;
string url = "http://localhost:52824/api/register?userid=" + userId; //设置HttpClientHandler的AutomaticDecompression
var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
//创建HttpClient（注意传入HttpClientHandler）
using (var http = new HttpClient(handler))
{
//使用FormUrlEncodedContent做HttpContent
var content = new FormUrlEncodedContent(new Dictionary<string, string>()
{
{"Name","修改zzl"},
{"Info", "Put修改动作"}//键名必须为空
}); //await异步等待回应 var response = await http.PutAsync(url, content);
//确保HTTP成功状态值
response.EnsureSuccessStatusCode();
//await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
Console.WriteLine(await response.Content.ReadAsStringAsync());
} }