![](/img/trans.png)
[英]WebApi Controller Method with SimpleInjector not adding records to database
[英]Runtime Null Reference Exception Using SimpleInjector in WebApi Controller
在我的MVC项目中,我有一个API控制器,我想使用依赖注入。 我使用Simple Injector进行依赖注入。
这是我的api控制器:
public class MedicInfoesApiController : ApiController
{
private readonly IDiContext _dbContext;
public MedicInfoesApiController() { }
public MedicInfoesApiController(IDiContext diContext)
{
_dbContext = diContext;
}
// POST: api/MedicInfoesApi
[ResponseType(typeof(MedicInfo))]
public IHttpActionResult PostMedicInfo(MedicInfo medicInfo)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
// Create empty Employee Object to get info of person being submitted via IBM
Employee emp = new Employee();
//check if IBM that user is submitting exists
if (!EmployeeData.IsValidIBM(medicInfo.MedicIbm))
{
ModelState.AddModelError("", "This IBM does not exist!");
}
// Check if any existing IBM's match what the user is trying to submit... if none then save to database
else if (_dbContext.GainAccess().MedicInfoes.Any(x => x.MedicIbm.Equals(medicInfo.MedicIbm, StringComparison.CurrentCultureIgnoreCase)))
{
ModelState.AddModelError("", "This person already exists!");
}
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
else
{
// Set empty Employee object with Data of person
emp = EmployeeData.GetEmployee(medicInfo.MedicIbm);
medicInfo.Active = true;
_dbContext.GainAccess().MedicInfoes.Add(medicInfo);
_dbContext.GainAccess().SaveChanges();
}
调试时,运行时错误发生在else if
语句中:
x.MedicIbm =错误CS0103:当前上下文中不存在名称“x”
和
_dbContext = NULL
可以将依赖注入与api控制器一起使用吗? 我以为他们可以吗?
任何有关为何发生这种情况的解释或帮助都非常感谢。
正在调用默认构造函数,因此不会注入上下文。 因此无效
从ApiController
删除默认构造ApiController
并保持跟随
public MedicInfoesApiController(IDiContext diContext) {
_dbContext = diContext;
}
还要确保IDiContext
已正确注册到DI容器
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.