我具有以下功能:
[HttpGet]
[Route("Departments/{departmentid}/employeeByDeptId")]
[ResponseType(responseType: typeof(IList<Employee>))]
public HttpResponseMessage GetDetailsByDeptId(int departmentId, DateTime? sinceDate)
{
if (!ModelState.IsValid)
{
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
}
var detailInfo = _employeeManager.GetDetailInfo(departmentId, sinceDate ?? _sinceDate);
return CreateHttpResponseMessage(detailInfo);
}
我在声明中将sinceDate作为Nullable类型,因此,如果传递了null值,它将采用本地声明的'_sinceDate'变量中存在的日期。现在,如何在进行API调用时将null值传递给sinceDate参数。
当我在网址下方传递时:http://localhost:26754/v1/EmployeeMgnt/Departments/4/employeeByDeptId?sinceDate=2020-03-03
我得到了期望的结果。现在,我想将sinceDate传递为null。我试过了http://localhost:26754/v1/EmployeeMgnt/Departments/4/employeeByDeptId?sinceDate=nullhttp://localhost:26754/v1/EmployeeMgnt/Departments/4/employeeByDeptId?sinceDate无效
所有人都给出了错误的请求错误。请告诉我如何在API调用中将null值分配给sinceDate?
parameterName = null
。 public HttpResponseMessage GetDetailsByDeptId(int departmentId, DateTime? sinceDate = null){
}
然后在您的请求中,您可以仅排除该参数并使用进行访问;
http://localhost:26754/v1/EmployeeMgnt/Departments/4/employeeByDeptId
另一个选择是添加重载。有2个函数名称接收不同的参数。
public HttpResponseMessage GetDetailsByDeptId(int departmentId, DateTime sinceDate){ } public HttpResponseMessage GetDetailsByDeptId(int departmentId){ }