C# Web Api - NUnit 测试 - Newtonsoft.Json.JsonSerializationException

Question

我需要反序列化以下 JSON 字符串。

{"status":"success","data":[{"id":4,"domainTitle":"Java","isDeleted":true},{"id":5,"domainTitle":"PHP","isDeleted":true},{"id":6,"domainTitle":"Angular","isDeleted":true}]}

同样的测试代码是:

[Test]
    public async Task TestGetDeletedDomainsAsync_UserDomains_StatusCodeOK()
    {
        using (var adminController = new AdminController(_adminService.Object))
        {
            //act
            var response = _adminController.GetDeletedDomainsAsync();
            var successStatus = await response.Content.ReadAsAsync<SuccessStatus>();
            var returnData = JsonConvert.DeserializeObject<List<Domain>>(successStatus.Data.ToString());
            // assert
            Assert.Multiple(() =>
            {
                Assert.That(response, Is.TypeOf<HttpResponseMessage>());
                Assert.That(returnData, Is.TypeOf<List<Domain>>());
                Assert.AreEqual(response.StatusCode, HttpStatusCode.OK);
                Assert.IsNotNull(successStatus);
                Assert.AreEqual("success", successStatus.Status);
                Assert.IsNotNull(returnData);
                //checking if same object goes to service and also if that service is called once
                _adminService.Verify(s => s.GetDeletedDomains(), Times.Once);
            });
        }
    }

但是当我尝试使用反序列化器时，它给出了一个异常。

Newtonsoft.Json.JsonSerializationException : Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[IMS_NL.Models.Domain]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly. To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.

显示上述错误的行是--

var returnData = JsonConvert.DeserializeObject<List<Domain>>(successStatus.Data.ToString());

帮我解决一下。提前致谢。

Answer 1

您需要创建一个对应于您的 JSON 字符串的类

public class Answer
{
    public string Status { get; set; }
    public List<Domain> Data { get; set; }
}

public class Domain
{
    public int Id { get; set; }
    public string DomainTitle { get; set; }
    public bool IsDeleted { get; set; }
}

然后使用 var returnData = JsonConvert.DeserializeObject<Answer>(successStatus.Data.ToString());