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我想創建一個查詢,其結果將存儲在ViewModel中。當我嘗試將查詢變量分配給ViewModel的方法時,出現以下錯誤:「不能隱式地將類型'System.Linq.Iqueryable'轉換爲'System.Collections.Generic.List'。顯式轉換存在缺少演員?)「。 我試着改變我的ViewModel的方法是類型Iqueryable而不是List工作,但然後我不能在我的視圖中使用foreach循環來循環我的模型,所以我將它改回List。我在查詢後嘗試做ToList(),但那也不起作用。任何建議/提示/技巧,不勝感激。以下是我的控制器代碼和我的ViewModel代碼。將查詢轉換爲列表(不工作)asp.net mvc
視圖模型:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using KU_PLAN_DEV.Models;
namespace KU_PLAN_DEV.ViewModels
{
public class TrackViewModel
{
public List<string> TRACK_INFO { get; set; }
public List<string> GEN_ED_HEAD { get; set; }
}
}
控制器的方法:
public ActionResult DisplayTrackSheet(string trackButton)
{
var db = new KuPlanEntities();
var trackProgNum = (from info in db.TRACK_INFO
where info.degreeName == trackButton
select info.progNum).ToString();
var trackVerNum = (from info in db.TRACK_INFO
where info.degreeName == trackButton
select info.versionNum).ToString();
/*var queryTrack = (from tracks in db.GEN_ED_HEAD
where tracks.)*/
var trackData = (from trackInfo in db.TRACK_INFO
where trackInfo.progNum == trackProgNum
&& trackInfo.versionNum == trackVerNum
select trackInfo);
var trackDisplayMod = new TrackViewModel
{
TRACK_INFO = trackData
};
return View(trackDisplayMod);
}