如何將列表添加到SQL查詢？

Question

我傳遞參數month並追加到列表中。

如何將列表添加到SqlQuery參數？

錯誤：從對象類型System.Collections.Generic.List`1 []到已知托管提供程序本機類型的映射不存在。

public ActionResult filterhre(int? month, int? year)
{
    List<int> lst = new List<int>();

    for (int i = 1; i <= @month; i++)
    {
        lst.Add(i);
    }

    ViewBag.location_fraud_year = db.Database.SqlQuery<YearCheck>(@"SELECT fraud_location, count(claim_amount) as counting_claim, sum(claim_amount) as counting_sum FROM testtable
where month(datelocation) in ({0}) and year(datelocation)={1} and fraud_location is not null ",lst, year).ToList(); 
}

模型：

public class YearCheck
{
    public string fraud_location { get; set; }
    public int? counting_claim { get; set; }
    public decimal? counting_sum { get; set; }
}

Answer 1

錯誤消息告訴您，.Net不知道如何在SQL中將列表轉換為逗號分隔的列表。 您必須自己做：

ViewBag.location_fraud_year = db.Database.SqlQuery<YearCheck>(@"...", String.Join(",", names.ToArray()), year).ToList();