Question

您好我的代码有问题，似乎它与实例有关但我在控制器中声明已经是一个实例，它似乎无效。

我收到了这个错误：

InvalidOperationException：传递给ViewDataDictionary的模型项的类型为'Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1 [PEMCOLoan.DAL.Entities.spModels.spGetLedger]'，但此ViewDataDictionary实例需要类型的模型项'PEMCOLoan.Web.Models.Ledger'。

控制器

视图

[HttpPost]
    [ValidateAntiForgeryToken]
    public IActionResult getEmployeeLedger(spGetLedger ledger)
    {
        var firstDay = _Context.LoanPayments.Min(min => min.DateOfPayment);
        var lastDay = _Context.LoanPayments.Max(max => max.DateOfPayment);

        //Set Test data

        //Set Parameter
        var StartDate = new SqlParameter("StartDate", firstDay);
        var EndDate = new SqlParameter("EndDate", lastDay);
        var EmpID = new SqlParameter("EmployeeID", ledger.EmployeeID);
        var LoanTypeID = new SqlParameter("LoanType", ledger.LoanTypeID);

        Ledger newLedger = new Ledger();

        newLedger.enumledger = _Context.Set<spGetLedger>().FromSql("EXECUTE spGetLedger @EmployeeID, @LoanType, @StartDate, @EndDate", EmpID, LoanTypeID, StartDate, EndDate).AsNoTracking();
        //var empLedger = _Context.getLedger
        return View(newLedger.enumledger);
    }

Answer 1

AsNoTracking返回IQueryable。将其更改为.AsNoTracking（）。ToList（）以强制在该点进行检索。

Answer 2

您需要添加.ToList()：

Ledger newLedger = new Ledger();

newLedger.enumledger = _Context.Set<spGetLedger>().FromSql("EXECUTE spGetLedger @EmployeeID, @LoanType, @StartDate, @EndDate", EmpID, LoanTypeID, StartDate, EndDate).AsNoTracking().ToList();

return View(newLedger.enumledger);

模型项传递到ViewDataDictionary

2 个答案: