我已在webapiconfig.cs中注册了批量WebAPI和WebAPI服务，如下所示
config.Routes.MapHttpBatchRoute(
routeName: "WebApiBatch",
routeTemplate: "api/$batch",
batchHandler: new DefaultHttpBatchHandler(GlobalConfiguration.DefaultServer));
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
webAPI服务如下
员工类
public class Employee
{
public int EmployeeID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public Employee()
{
}
public Employee(int id, string LN, string FN)
{
this.EmployeeID = id;
this.LastName = LN;
this.FirstName = FN;
}
}
员工界面
interface IEmployeeRepository
{
IEnumerable<Employee> GetAll();
Employee Get(int EmployeeID);
Employee Add(Employee emp);
void Remove(int EmployeeID);
bool Update(Employee emp);
}
员工存储库
public class EmployeeRepository : IEmployeeRepository
{
private List<Employee> emp = new List<Employee>();
public EmployeeRepository()
{
emp.Add(new Employee(1, "Davolio", "Nancy"));
emp.Add(new Employee(2, "Fuller", "Andrew"));
emp.Add(new Employee(3, "Leverling", "Janet"));
emp.Add(new Employee(4, "Peacock", "Margaret"));
emp.Add(new Employee(5, "Buchanan", "Steven"));
}
public IEnumerable<Employee> GetAll()
{
return emp;
}
public Employee Get(int id)
{
return emp.Find(p => p.EmployeeID == id);
}
public Employee Add(Employee eObj)
{
if (eObj == null)
{
throw new ArgumentNullException("eObj");
}
emp.Add(eObj);
return eObj;
}
public void Remove(int id)
{
emp.RemoveAll(p => p.EmployeeID == id);
}
public bool Update(Employee eObj)
{
if (eObj == null)
{
throw new ArgumentNullException("eObj");
}
int index = emp.FindIndex(p => p.EmployeeID == eObj.EmployeeID);
if (index == -1)
{
return false;
}
emp.RemoveAt(index);
emp.Add(eObj);
return true;
}
}
WebAPI控制器
public class EmployeeController : ApiController
{
static readonly IEmployeeRepository repository = new EmployeeRepository();
// GET api/<controller>
[HttpGet]
public object Get()
{
var queryString = HttpContext.Current.Request.QueryString;
var data = repository.GetAll().ToList();
return new { Items = data, Count = data.Count() };
}
public Employee GetEmployee(int id)
{
Employee emp = repository.Get(id);
if (emp == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
return emp;
}
// POST api/<controller>
public HttpResponseMessage PostEmployee(Employee emp)
{
emp = repository.Add(emp);
var response = Request.CreateResponse<Employee>(HttpStatusCode.Created, emp);
string uri = Url.Link("Employee", new { id = emp.EmployeeID });
response.Headers.Location = new Uri(uri);
return response;
}
[HttpPut]
// PUT api/<controller>
public void PutEmployee(Employee emp)
{
if (!repository.Update(emp))
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
}
[HttpDelete]
public void Delete(int id)
{
// int empID = int32
Employee emp = repository.Get(id);
if (emp == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
repository.Remove(id);
}
}
我已经从客户端提出了ajax请求，以便按如下方式访问服务 我在ajax的数据字段中设置了批处理请求
--batch_ec79f662-862e-4016-a19a-1dbff86d7120
Content-Type: multipart/mixed; boundary=changeset_eb327bfc-5424-47b6-becf-416c43e13899
--changeset_eb327bfc-5424-47b6-becf-416c43e13899
Content-Type: application/http
Content-Transfer-Encoding: binary
POST /api/Employee HTTP/1.1
Content-Id: 0
Content-Type: application/json; charset=utf-8
{"EmployeeID":6,"FirstName":"angel","LastName":"dsfs"}
--changeset_eb327bfc-5424-47b6-becf-416c43e13899
Content-Type: application/http
Content-Transfer-Encoding: binary
PUT /api/Employee HTTP/1.1
Content-Id: 1
Content-Type: application/json; charset=utf-8
{"EmployeeID":2,"FirstName":"kalai","LastName":"selvi"}
--changeset_eb327bfc-5424-47b6-becf-416c43e13899
Content-Type: application/http
Content-Transfer-Encoding: binary
PUT /api/Employee HTTP/1.1
Content-Id: 2
Content-Type: application/json; charset=utf-8
{"EmployeeID":3,"FirstName":"Janet","LastName":"Leverling"}
--changeset_eb327bfc-5424-47b6-becf-416c43e13899
Content-Type: application/http
Content-Transfer-Encoding: binary
DELETE /api/Employee(3) HTTP/1.1
Content-Id: 3
Content-Type: application/json; charset=utf-8
--changeset_eb327bfc-5424-47b6-becf-416c43e13899--
--batch_ec79f662-862e-4016-a19a-1dbff86d7120--
整个ajax请求
$.ajax{
Content-type: "multipart/mixed; charset=UTF-8;boundary=batch_ec79f662-862e-4016-a19a-1dbff86d7120",
data:"--batch_ec79f662-862e-4016-a19a-1dbff86d7120↵Content-Type: multipart/mixed; boundary=changeset_eb327bfc-5424-47b6-becf-416c43e13899↵↵--changeset_eb327bfc-5424-47b6-becf-416c43e13899↵Content-Type: application/http↵Content-Transfer-Encoding: binary ↵↵POST /api/Employee HTTP/1.1↵Content-Id: 0↵Content-Type: application/json; charset=utf-8 ↵↵{"EmployeeID":6,"FirstName":"angel","LastName":"dsfs"}↵↵--changeset_eb327bfc-5424-47b6-becf-416c43e13899↵Content-Type: application/http↵Content-Transfer-Encoding: binary ↵↵PUT /api/Employee HTTP/1.1↵Content-Id: 1↵Content-Type: application/json; charset=utf-8 ↵↵{"EmployeeID":2,"FirstName":"kalai","LastName":"selvi"}↵↵↵--changeset_eb327bfc-5424-47b6-becf-416c43e13899↵Content-Type: application/http↵Content-Transfer-Encoding: binary ↵↵PUT /api/Employee HTTP/1.1↵Content-Id: 2↵Content-Type: application/json; charset=utf-8 ↵↵{"EmployeeID":3,"FirstName":"Janet","LastName":"Leverling"}↵↵↵--changeset_eb327bfc-5424-47b6-becf-416c43e13899↵Content-Type: application/http↵Content-Transfer-Encoding: binary ↵↵DELETE /api/Employee(3) HTTP/1.1↵Content-Id: 3↵Content-Type: application/json; charset=utf-8 ↵↵--changeset_eb327bfc-5424-47b6-becf-416c43e13899--↵--batch_ec79f662-862e-4016-a19a-1dbff86d7120--",
type:"POST",
url:"/api/Employee"
}
提出请求后，我收到了一条异常消息
1. {Message: "The request entity's media type 'multipart/mixed' is not supported for this resource.",…}
1. ExceptionMessage:"No MediaTypeFormatter is available to read an object of type 'Employee' from content with media type 'multipart/mixed'."
2. ExceptionType:"System.Net.Http.UnsupportedMediaTypeException"
3. Message:"The request entity's media type 'multipart/mixed' is not supported for this resource."
StackTrace:" at System.Net.Http.HttpContentExtensions.ReadAsAsync[T](HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)
↵ at System.Net.Http.HttpContentExtensions.ReadAsAsync(HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)
↵ at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)"
我犯了什么错误
答案 0 :(得分：0)
确保您正在调用您配置的实际批处理路由，而不是直接调用EmployeeController上的端点。当你这样做时（我看到你的ajax调用有url：“/ api / Employee”）然后你会得到那条消息，因为这些端点不支持混合模式。如果你改为调用批处理路由（/ api / batch），那么应该这样做。我使用的端点没有美元符号，但我将其配置为api / batch：
routeName: "batch",
routeTemplate: "api/batch",