An error in the Controller, "System. NullReferenceException: 'Object reference not set to an instance of an Object.'
", concrete in line 37

 using Application. Contracts. Helpers; 
Using the Application. The Contracts; 
using System; 
Using System. Web. Mvc; 
Using their Helpers; 
Using FF. Models. ViewModels. Admin. AutoSuitability; 
Using Application. BusinessLogic. Model; 
Using System. Collections. Generic; 
Using Microsoft. AspNet. Identity; 
Using Application. BusinessLogic. Repositories; 
Using FF. Services; 
Using System. Linq; 
Using FF. Services. Admin; 
Using FF. Models. ViewModels. Admin. Security; 
Using FF. Services. Admin. Services; 

The namespace their Areas. Admin. Controllers 
{
Public class SecurityController: AdminController 
{
Private readonly ISecurityIPsWhiteListService _securityIPsWhiteListService; 

Public SecurityController () {} 


Public SecurityController (ISecurityIPsWhiteListService securityIPsWhiteListService) 
{
_securityIPsWhiteListService=securityIPsWhiteListService; 
} 

[AuthorizeUser (FFRoles=new string [] {AspNetRoles. ITGuys})] 
Public ActionResult IPsWhiteList () 
{
IEnumerable The model=null; 
Try 
{
The model=_securityIPsWhiteListService. GetSecurityIPsWhiteListViewModel (); 
} 
The catch (Exception e) 
{
Logger. GenerateError (e, null, the System. Reflection. MethodBase. GetCurrentMethod (). The DeclaringType); 
} 
Return the View (the model); 
} 

} 
} 

Other code below

The ViewModel ( SecurityIPsWhiteListViewModel. Cs )

 using System; 
Using System. Collections. Generic; 
Using System. Linq; 
Using System. The Text; 
Using System. The Threading. The Tasks; 
Using Application. BusinessLogic. Model; 
Using System.Com ponentModel. DataAnnotations; 

The namespace FF. Models. ViewModels. Admin. Security 
{
Public class SecurityIPsWhiteListViewModel 
{
Public SecurityIPsWhiteListViewModel () 
{

} 

Public int Id {get; The set; } 

[the Display (Name="IP!!!!!")] 
Public string IP {get; The set; } 

[the Display (Name="Description!!!!!")] 
Public string Description {get; The set; } 
[the Display (Name="CreationDate!!")] 
The public System. A DateTime CreationDate {get; The set; } 
[the Display (Name="CreationUserId!!")] 
Public int CreationUserId {get; The set; } 
} 
} 

Interface ( ISecurityIPsWhiteListService. Cs )

 using System. Collections. Generic; 
Using System. Linq; 
Using System. The Text; 
Using System. The Threading. The Tasks; 
Using FF. Services. ViewModels; 
Using Application. BusinessLogic. Model; 
Using FF. ViewModels. Admin. Translation; 
Using the Application. The Contracts; 
Using FF. Models. ViewModels. Admin. Security; 

The namespace FF. Services. Admin 
{
Public interface ISecurityIPsWhiteListService 
{
IEnumerable GetSecurityIPsWhiteLists (); 
IEnumerable GetSecurityIPsWhiteListViewModel (); 
SecurityIPsWhiteList GetSecurityIPsWhiteListById (int id); 

} 
} 

Services ( SecurityIPsWhiteListService. Cs ) :

 using System; 
Using System. Collections. Generic; 
Using System. Linq; 
Using System. The Text; 
Using System. The Threading. The Tasks; 
Using Application. BusinessLogic. Repositories; 
Using Application. BusinessLogic. Model; 
Using the Application. The Contracts; 
Using FF. Services. ViewModels; 
Using Application. Contracts. Helpers; 
Using OfficeOpenXml; 
Using OfficeOpenXml. Style; 
Using System. IO; 
Using System. The Configuration; 
Using Application. Contracts. Extensions; 
Using FF. ViewModels. User. Shared; 
Using FF. ViewModels. Admin; 
Using FF. Models. ViewModels. Admin. Security; 
Using FF. Services. Admin. Services; 

The namespace FF. Services. Admin. Services 
{
Public class SecurityIPsWhiteListService: ISecurityIPsWhiteListService 
{
Private readonly IGenericRepository _securityIPsWhiteListRepository; 

Public SecurityIPsWhiteListService () 
{

} 

Public SecurityIPsWhiteListService (
IGenericRepository SecurityIPsWhiteListRepository) 
{
_securityIPsWhiteListRepository=securityIPsWhiteListRepository; 

} 


Public IEnumerable GetSecurityIPsWhiteLists () 
{
Var m=new List (a); 
Try 
{
M=_securityIPsWhiteListRepository List (). OrderBy (t=& gt; Tc reationDate). ToList (); 
} 
The catch (Exception e) 
{
M=null; 
Logger. GenerateError (e, 
Null, 
System. Reflection. MethodBase. GetCurrentMethod (). The DeclaringType); 
} 
Return m; 
} 

Public IEnumerable
          

          

            
Page link：https//www.codepudding.com/net/103767.html
          
          

               
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