odata查询可以再次使用ApiController，但不能再次使用ODataController

Question

我尝试在WebAPI 2中使用System.Web.OData.ODataController。

WebConfig.cs

        ODataModelBuilder builder = new ODataConventionModelBuilder();
        builder.EntitySet<User>("User");
        config.MapODataServiceRoute(
            routeName: "ODataRoute",
            routePrefix: null,
            model: builder.GetEdmModel());

控制器：

public class UserApiODataController : ODataController
{
    [Route("api/lookups/users")]
    [EnableQuery(AllowedQueryOptions = AllowedQueryOptions.All)]
    public IHttpActionResult GetUsers()
    {
        try
        {
            var context = new DbContenxt();
            return Ok(context.Users.AsQueryable());
        }
        catch (Exception exception)
        {
            return InternalServerError(exception);
        }
    }
}

当我尝试查询数据时，我得到错误：

GET http://localhost:58786/api/lookups/users 406 (Not Acceptable)

当我用ApiController替换ODataController时，查询效果很好。

请求头：

Accept:application/atomsvc+xml;q=0.8, application/json;odata=fullmetadata;q=0.7, application/json;q=0.5, */*;q=0.1
Accept-Encoding:gzip, deflate, sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:keep-alive
DataServiceVersion:2.0
Host:localhost:58786
MaxDataServiceVersion:2.0
Origin:http://localhost:62131
Pragma:no-cache
Referer:htpp://localhost:62131/
User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36

ODataController响应标头：

Remote Address:[::1]:58786
Request URL:http://localhost:58786/api/lookups/users
Request Method:GET
Status Code:406 Not Acceptable
Response Headers
view source
Access-Control-Allow-Credentials:true
Access-Control-Allow-Origin:http://localhost:62131
Cache-Control:no-cache
Content-Length:0
Date:Mon, 30 Nov 2015 16:09:25 GMT
Expires:-1
Pragma:no-cache
Server:Microsoft-IIS/10.0
X-AspNet-Version:4.0.30319
X-Powered-By:ASP.NET
X-SourceFiles:=?UTF-8?B?RDpccHJvamVjdHNcZG9rdW1lbnRhXFN3YWxsb3dcU3JjXFN3YWxsb3cuV2ViQXBpXGFwaVxsb29rdXBzXExpY2Vuc2VUeXBl?=

ApiController响应头

Access-Control-Allow-Credentials:true
Access-Control-Allow-Origin:http://localhost:62131
Cache-Control:no-cache
Content-Length:247
Content-Type:application/json; charset=utf-8
Date:Mon, 30 Nov 2015 16:20:53 GMT
Expires:-1
Pragma:no-cache
Server:Microsoft-IIS/10.0
X-AspNet-Version:4.0.30319
X-Powered-By:ASP.NET
X-SourceFiles:=?UTF-8?B?RDpccHJvamVjdHNcZG9rdW1lbnRhXFN3YWxsb3dcU3JjXFN3YWxsb3cuV2ViQXBpXGFwaVxsb29rdXBzXExpY2Vuc2VUeXBl?=

在客户端，我使用JayData。

怎么了？知道吗？

Answer 1

首先，从命名空间System.Web.OData.ODataController，我认为您使用的是Web API ODataV4库。V4不接受application/atomsvc+xml，因为OData V4规范中只有"Json"是标准。

其次，odata=fullmetadata是ODataV3元数据头，对于V4，它应该是otata.metadata=full

第三，[Route("api/lookups/users")]是Web API属性。如果要使用ODataController，请使用OData版本。[ODataRoute("...")]

第四，请确保[route（…）]中的路由模板遵循OData Uri约定。点击此处查看更多详细信息

第五，你可以从这里获得更多的教程。

希望它能帮助你。谢谢