如何在傳遞兩個查詢到一個視圖

Question

我想這兩個方法傳遞給一個觀點：

public IEnumerable<ProfitAndCostViewModel> getProfitSum() 
     { 
      var profBalance = db.Profits 
    .Where(x => x.IdUser.UserId == WebSecurity.CurrentUserId) 
    .GroupBy(x => x.IdUser.UserId) 
    .Select(x => new ProfitAndCostViewModel { ProfitSum = x.Sum(y => y.Value) }) 
    .ToList(); 
      return profBalance; 
     } 

     public IEnumerable<ProfitAndCostViewModel> getCostSum() 
     { 
      var costBalance = db.Costs 
    .Where(x => x.IdUser.UserId == WebSecurity.CurrentUserId) 
    .GroupBy(x => x.IdUser.UserId) 
    .Select(x => new ProfitAndCostViewModel { CostSum = x.Sum(y => y.Value) }) 
    .ToList(); 
      return costBalance; 
     } 

在我的ActionResult

我有這樣的：

var pcv = new ProfitAndCostViewModel(); 
      pcv.ProfModel =getProfitSum(); 
      pcv.CostModel =getCostSum(); 

      return View(pcv); 

而且在ProfitAndCostViewModel代碼是這樣的：

public double ProfitSum { get; set; } 
     public double CostSum { get; set; } 
     public double FinalBalance { get; set; } 
     public IEnumerable<ProfitAndCostViewModel> ProfModel { get; set; } 
     public IEnumerable<ProfitAndCostViewModel> CostModel { get; set; } 

這是錯誤：The model item passed into the dictionary is of type 'WHFM.ViewModels.ProfitAndCostViewModel', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable 1 [WHFM.ViewModels.ProfitAndCostViewModel]」`

Answer 1

它看起來像你的看法是強類型到IEnumerable<ProfitAndCostViewModel>：

@model IEnumerable<ProfitAndCostViewModel> 

但在這裏要傳遞一個ProfitAndCostViewModel實例吧：

var pcv = new ProfitAndCostViewModel(); 
pcv.ProfModel =getProfitSum(); 
pcv.CostModel =getCostSum(); 
return View(pcv); 

所以，你應該修正模型到您的查看輸入：

@model ProfitAndCostViewModel