使用实体框架从存储过程中获取多个字符串输出

Question

以下存储过程显示三个字符串和一个表行结果作为输出。 有什么方法可以使用实体框架在mvc视图输出面板上显示所有结果？

我可以在下面的代码中看到第一个字符串的结果。 但是无论如何，都可以获得其他两个选择字符串输出和表行结果。

private CustomerEntities db = new CustomerEntities();
        public ActionResult Index()
        {
            var results = db.usp_CustomerData("124544", 1500);
            var abc = results.ToList();
            return View();
        }

ALTER PROCEDURE [dbo].[usp_CustomerData]
@CustomerID varchar(6),
@MinsBack int
AS
BEGIN

    DECLARE @Count int
    SET @Count = (SELECT Count(*)
                    FROM Customer WITH (NOLOCK)
                    WHERE CustomerID = @CustomerID AND                       
                          DATEDIFF(mi, ReceivedAt, GETUTCDATE()) < @MinsBack)
    IF (@Count = 1)
        SELECT 'Ok:  1 message in Customer table'
    ELSE
        SELECT 'ERROR:  Expected 1 message in Customer table, but found ' + CONVERT(varchar(3), @Count) + ' messages.'


    SET @Count = (SELECT Count(*)
                    FROM CustomerDetails WITH (NOLOCK)
                    WHERE CustomerID = @CustomerID AND
                          DATEDIFF(mi, LastUpdatedAt, GETDATE()) < @MinsBack)
    IF (@Count = 1)
        SELECT 'Ok:  1 record in CustomerDetails table'
    ELSE
        SELECT 'ERROR:  Expected 1 record in CustomerDetails table, but found ' + CONVERT(varchar(3), @Count) + ' records.'


    SET @Count = (SELECT Count(*)
                    FROM CustomerProduct WITH (NOLOCK)
                    WHERE CustomerID = @CustomerID AND
                          DATEDIFF(mi, LastUpdatedAt, GETDATE()) < @MinsBack)
    IF (@Count = 1)
        SELECT 'Ok:  1 record in CustomerProduct table'
    ELSE
        SELECT 'ERROR:  Expected 1 record in CustomerProduct table, but found ' + CONVERT(varchar(3), @Count) + ' records.'

    SELECT *FROM Customer where customerID = @CustomerID

END

Answer 1

作为建议，您可以在SQL脚本中创建一个临时表，该表将用作临时存储。

CREATE TABLE #Results
(
    Message VARCHAR(512)
)

代替在每个IF或ELSE直接SELECT ，您应该将字符串插入到临时表中。 最后，您可以达到目标，通过以下方式获取所有插入的字符串以返回它们：

SELECT * FROM #Results

为了获得客户（就像最后一样），您应该触发对数据库的新查询。

根据您的情况，您应该考虑通过数据上下文查询数据库，而不是通过存储过程查询数据库。

Answer 2

您需要执行此链接中建议的操作，但我在下面总结了

对于每个结果集，您需要做一个reader.NextResult（）;。

var someReturnObject = new ResultObject();

using (var context = new LinqPadDbContext(@"Server=localhost\SQLEXPRESS;Database=StackOverflow;Trusted_Connection=True;"))
{
    var cmd = context.Database.Connection.CreateCommand();
    cmd.CommandText = "[dbo].[GetSomeData]";

    try
    {           
        context.Database.Connection.Open();

        var reader = cmd.ExecuteReader();

        var result1 = ((IObjectContextAdapter)context).ObjectContext.Translate<string>(reader);

        someResultObject.Text1 = result1.First();

        //for each extra result, start here
        reader.NextResult();

        var users = ((IObjectContextAdapter)context).ObjectContext.Translate<User>(reader);

        someResultObject.Users = users.Select(x => x);
        //stop here
    }
    finally
    {
        context.Database.Connection.Close();
    }
}