c# - MVC C#使用参数调用存储过程第一个参数未被识别

Question

有人可以向我解释一下吗？我有这个存储过程：

ALTER proc [dbo].[Invoice_GetHomePageInvoices] (
      @AreaIdList varchar(max)
,      @FinancialYearStartDate datetime = null
,      @FinancialYearEndDate datetime = null
) as

在代码中，我试图这样称呼它：

var areasString = new SqlParameter("AreaIdList", "1,2");
var startDate = new SqlParameter("FinancialYearStartDate", financialYear.StartDate);
var endDate = new SqlParameter("FinancialYearEndDate", financialYear.EndDate);

return _db.Database.SqlQuery<HomePageInvoice>("Invoice_GetHomePageInvoices", areasString, startDate, endDate);

我收到此错误：

过程或函数“Invoice_GetHomePageInvoices”需要未提供的参数“@AreaIdList”。

说什么？我已经提供了该参数。有人可以给我一些关于如何解决的见解吗？

Answer 1

你需要这样称呼它：

var areasString = new SqlParameter("AreaIdList", "1,2");             
var startDate = new SqlParameter("FinancialYearStartDate", financialYear.StartDate);             
var endDate = new SqlParameter("FinancialYearEndDate", financialYear.EndDate);              
return _db.Database.SqlQuery<HomePageInvoice>("EXEC Invoice_GetHomePageInvoices @AreaIdList, @FinancialYearStartDate, @FinancialYearEndDate", areasString, startDate, endDate);

我相信你也可以缩短一点，比如：

return _db.Database.SqlQuery<HomePageInvoice>("EXEC Invoice_GetHomePageInvoices {0}, {1}, {2}", "1,2", financialYear.StartDate, financialYear.EndDate);

Answer 2

它可能期望参数值：

return _db.Database.SqlQuery<HomePageInvoice>("Invoice_GetHomePageInvoices", areasString.Value, startDate.Value, endDate.Value)