在我的MVC项目中,我有一个要用于依赖注入的API控制器。我正在使用Simple Injector进行依赖项注入。
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,else if
语句上发生运行时错误,说明:
x.MedicIbm =错误CS0103:名称“ x”在当前上下文中不存在
和
_dbContext =空
依赖注入可以与api控制器一起使用吗?我以为他们可以?
对于为什么发生这种情况的任何解释或帮助,我们深表感谢。
答案 0 :(得分:3)
正在调用默认构造函数,因此不会注入上下文。因此 null
从ApiController
中删除默认构造函数,并保持关注
public MedicInfoesApiController(IDiContext diContext) {
_dbContext = diContext;
}
还要确保IDiContext
已在DI容器中正确注册