[英]SqlQuery<T> equivalent in EF Core 3.1
我正在從 ASP.NET Framwork 4.7 遷移到 Asp .NET Core 3.1,但我真的陷入了以下問題:
我有一個 SQL 查詢:
string Query="
SELECT I.Id,I.Combokod,I.S_Omr,I.Date,M.Price,M.Name,M.Dmedel,M.Year,M.Miles
FROM dbo.Itemannounces AS I
INNER JOIN dbo.MotorDBs AS M ON I.MotorDBs_Id=M.Id where M.MotorID=1" ;
我的定制課程:
public class Fordonlista
{
public int Id { get; set; }
public byte Combokod { get; set; }
public byte Affarsform { get; set; }
public byte Model { get; set; }
public byte Dmedel { get; set; }
public short Year { get; set; }
public int Miles { get; set; }
public short S_Omr { get; set; }
public DateTime Date { get; set; }
public int Price { get; set; }
public string Name { get; set; }
public string Lan { get; set; }
public string Kommun { get; set; }
public byte Typ { get; set; }
}
為了檢索我使用的數據:
var result = Context.Database.SqlQuery<Fordonlista>(Query).ToList();
問題是如何在 EF Core 中得到結果? 如果 EF Core 是輕量級的,為什么還要從 Framwork 遷移到降級的 EF Core?
FromSqlRaw()
您可以使用新的 EF Core 3 方法FromSqlRaw()
。
在你的例子中,那將是
string Query="
SELECT I.Id,I.Combokod,I.S_Omr,I.Date,M.Price,M.Name,M.Dmedel,M.Year,M.Miles
FROM dbo.Itemannounces AS I
INNER JOIN dbo.MotorDBs AS M ON I.MotorDBs_Id=M.Id
where M.MotorID=1" ;
var result = Context.Fordonlista.FromSqlRaw(Query);
但更好的是傳遞一個參數如下:
int motorId = 1; //or passed in from other variable
var result = Context.Fordonlista.FromSqlInterpolated(
$"SELECT I.Id,I.Combokod,I.S_Omr,I.Date,M.Price,M.Name,M.Dmedel,M.Year,M.Miles
FROM dbo.Itemannounces AS I
INNER JOIN dbo.MotorDBs AS M ON I.MotorDBs_Id=M.Id
WHERE M.MotorID={motorId}";
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