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使用POSTMAN客户端的C＃web API POST JSON数据在FromBody中始终为NULL

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我有一个包含模型的Web Api -

public class Assessments
{
    public List<AssessmentResult> Results { get; set; }
}

public class AssessmentResult
{
    public int? AssessorId { get; set; }
    public int? AssessmentId { get; set; }
    public int? CentreId { get; set; }
    public int? BatchId { get; set; }
    public DateTime AssessmentDate { get; set; }

和控制器 -

[HttpPost]
    [ActionName("SetAssessmentResults")]
    public HttpResponseMessage SetAssessmentResults([FromBody] Assessments assessments)
    {
        try
        {

            string sproc = ConfigurationManager.AppSettings["ASSESSORAPP_InsertAssessmentsStaging"];
            //_dt = Helper.ToDataTable(assessments); use this if sending list doesnt work

            Mapper.Initialize(cfg =>
            {
                //cfg.CreateMissingTypeMaps = false;
                cfg.CreateMap<AssessmentResult, AssessmentTable>().IgnoreAllNonExisting();

                //cfg.IgnoreUnmapped();
            });
            List<AssessmentTable> assessmentTable = Mapper.Map<List<AssessmentResult>, List<AssessmentTable>>(assessments.Results);
            Mapper.Configuration.AssertConfigurationIsValid();

            string isSuccess = _db.InsertAssessmentResults(sproc, assessmentTable);
            if (isSuccess.Split('$')[0].ToLower() == "success")
            {
                return Request.CreateResponse(HttpStatusCode.OK, isSuccess);
            }
            else if (isSuccess.Split('$')[0].ToLower() == "duplicate")
            {
                return Request.CreateResponse(HttpStatusCode.OK, isSuccess);
            }
            else
            {
                return Request.CreateResponse(HttpStatusCode.OK, isSuccess);
            }
        }
        catch (Exception ex)
        {
            return Request.CreateResponse(HttpStatusCode.InternalServerError, ex);
        }
    }

客户端，我正在使用Postman Chrome扩展程序 . 我正在发送带有JSON数据的POST请求 . 但是，我没有在控制器中获取JSON数据（评估对象始终显示NULL值）

assessments object showing NULL value

在客户端，我要求使用PostMan Chrome扩展程序

PostMan Client sending request

这是我的JSON数据：

{
"assessment":
[{
      "AssessorId": 3,
      "AssessmentId": 123,
      "CentreId": 1,
      "BatchId": null,
      "AssessmentDate": "2016-09-30T00:00:00",

    },{
     "AssessorId": 2,
      "AssessmentId": 123,
      "CentreId": 1,
      "BatchId": null,
      "AssessmentDate": "2016-09-30T00:00:00",
    }]
    }

我还添加了Content-Type：application / json

请帮我解决这个问题 . 谢谢 ！

c# json asp.net-web-api http-post postman

1 回答

  • 1

    在您的类 Assessments 中，您将包含AssessmentResult列表的属性命名为“ Results " but when you send the post you are naming the property " assessment " it should be " Results ” (considering you have the default serializer configuration eg: no propertie name to lower camel case when serializing)

    尝试：

    {
     "Results":[{
                 "AssessorId": 3,
                 "AssessmentId": 123,
                 "CentreId": 1,
                 "BatchId": null,
                 "AssessmentDate": "2016-09-30T00:00:00",

               },
               {
                 "AssessorId": 2,
                 "AssessmentId": 123,
                 "CentreId": 1,
                 "BatchId": null,
                 "AssessmentDate": "2016-09-30T00:00:00",
               }]
 }

    另外作为一个好习惯，您应该在类Eg的构造函数中实例化列表：

    public class Assessments
{
    public Assessments()
    {
         Results = new List<AssessmentResult>();
    }
    public List<AssessmentResult> Results { get; set; }
}
    回复于

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