无法将类型'System.Collections.Generic.List转换为'System.Collections.Generic.List [英] Cannot convert type 'System.Collections.Generic.List to 'System.Collections.Generic.List

问题描述

大家好，
我需要帮助，我编写了一项从数据库表中获取记录的服务.其返回类型为List<>.我正在使用控制器方法调用该服务.
但这给了我铸造错误.我的代码如下:
这就是服务:

Hi all,
i need help, i have written a service which is fetching records from database table. its return type is List<> and i am calling the service in a controller method.
but it is giving me casting error. My code is below:
this is the service :

public List<tblClaimRegistration> GetAllClaimRegistrationRecords()
      {
          MACPEntities entities;
          entities = new MACPEntities();

          IEnumerable<tblClaimRegistration> records = from obj in entities.tblClaimRegistrations
                                                      select obj;
          return records.ToList();


      }

这是控制器方法:

this is the controller method:

[HttpPost]
    public ActionResult ToControl()
    {
        ServiceReference1.Service1Client svc = new ServiceReference1.Service1Client();
        List<tblClaimRegistration> ClaimRegistartion= (List<tblClaimRegistration>)svc.GetAllClaimRegistrationRecords().ToList();
 ViewData["ClaimRegistartion"] = ClaimRegistartion;

        return View("TestView");
      
    }

上面的代码给出了错误

the above code is giving error as

Cannot convert type ''System.Collections.Generic.List to ''System.Collections.Generic.List<MACP.Models.tblClaimRegistration>''	C:\inube\MACPCMSIntegration\MACP\Controllers\HomeController.cs	127	60	MACP

pls some body help what should i do.

推荐答案

方法"GetAllClaimRegistrationRecords()"已经返回"List< tblclaimregistration>".类型.

因此，您不需要询问ToList()...

那就做吧:

The method "GetAllClaimRegistrationRecords()" already return a "List<tblclaimregistration>" type.

So you doesn''t need to ask for ToList()...

Just do it :

List<tblClaimRegistration> ClaimRegistartion= svc.GetAllClaimRegistrationRecords()

我得到了解决方案:

i got the solution :

[HttpPost]
    public ActionResult ToControl()
    {
        ServiceReference1.Service1Client svc = new ServiceReference1.Service1Client();
       
 ViewData["ClaimRegistartion"] = svc.GetAllClaimRegistrationRecords();
 
        return View("TestView");
      
    }

它将起作用.

it will work.

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