C#Odata WebApi帖子中的元素列表

时间:2016-04-11 08:21:54

标签: c# .net json odata webapi2

我真的需要一些帮助。

我正在编写一个小型WebApi程序。

虽然单位测试我注意到我无法向我的帖子方法发送元素列表。

首先来看看我的单元测试:

 [TestMethod]
    public async Task PostWithExpandoObjectSerilasationToDataType()
    {
        //Define an imaginary Car Object
        List<dynamic> listExpando = new List<dynamic>();

        dynamic obj1 = new ExpandoObject();
        obj1.Attribute = "PS";
        obj1.DataType = "Integer";
        obj1.EntityId = "3";
        obj1.DefaultValue = "";

        dynamic obj2 = new ExpandoObject();
        obj2.Attribute = "Color";
        obj2.DataType = "Text Only";
        obj2.EntityId = "3";
        obj2.DefaultValue = "";

        dynamic obj3 = new ExpandoObject();
        obj3.Attribute = "Km";
        obj3.DataType = "Number";
        obj3.EntityId = "3";
        obj3.DefaultValue = "1.3";

        listExpando.Add(obj1);
        listExpando.Add(obj2);
        listExpando.Add(obj3);

        JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
        javaScriptSerializer.RegisterConverters(new JavaScriptConverter[] { new ExpandoJsonconverter() });

        string jsonOfTest = javaScriptSerializer.Serialize(listExpando);

        // arrange
        UnityContainer container = UnityConfig.RegisterComponents();
        var start = new Startup(container);

        using (TestServer server = TestServer.Create(builder => start.Configuration(builder)))
        {
            using (var client = new HttpClient(server.Handler))
            {

                HttpContent content = new StringContent(jsonOfTest, Encoding.UTF8, "application/json");

                var request = new HttpRequestMessage
                {
                    RequestUri = new Uri("http://testserver/odata/Attributes"),
                    Method = HttpMethod.Post,
                    Content = content
                };

                string jsonContent = content.ReadAsStringAsync().Result;
               request.Headers.Add("Prefer", "return=representation");

                // act
                HttpResponseMessage response = await client.SendAsync(request);
                Attributes result = response.Content.ReadAsAsync<Attributes>().Result;

                // assert
                Assert.IsNotNull(response);
                Assert.AreEqual(HttpStatusCode.Created, response.StatusCode);
                Assert.IsNotNull(result, "No result content found");
                Assert.IsNotNull(result.Attribute);
            }
        }
    }

接下来是我的帖子方法:

 public IHttpActionResult Post([ModelBinder]IEnumerable<Attributes> att)
    {....}

说到Post方法 att总是空的

尝试使用Rest服务时,我收到以下消息:

“message”:“Collection(EAVService.Entities.Attributes)不是实体类型。仅支持实体类型。”

谷歌搜索并尝试了不同的东西,但我没有找到一个有效的解决方案

有谁可以帮助我解决我的问题? :)

最诚挚的问候 安德烈

1 个答案:

答案 0 :(得分:2)

在OData中,POST通常用于add a single entity to a collection。因此,您的Post方法应具有以下签名:

public IHttpActionResult Post(Attributes att)

参见&#34;向实体集添加实体&#34;在Create an OData v4 Endpoint Using ASP.NET Web API 2.2中获取完整示例。

如果您需要在单个服务调用中创建多个Attributes实体,则有两种选择:

  • 在您的服务中实施batch request处理

  • 实施接受Attributes个实体集合的OData action,并将其批量添加到相应的实体集