使用Linq执行SQL函数

Question

我已经在MSSQL 2005中创建了一个函数，我想使用linq运行这个函数。我的函数有两个参数。定义如下：

USE [MobileGateway]
GO
/****** Object:  UserDefinedFunction [dbo].[Fn_GetNoLocationAddress]    Script Date: 11/07/2012 08:27:58 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[Fn_GetNoLocationAddress] 
(   
    -- Add the parameters for the function here
    @Site nvarchar(255),
    @ReceivedDate int
)
RETURNS @noLocationAddress TABLE (

RequestID int NOT NULL,
Barcode varchar(50) NOT NULL,
AdrID int NOT NULL,
Name varchar(50) NOT NULL,
Street varchar(50) NOT NULL,
HouseNo varchar(4) NOT NULL,
Postal varchar(8) NOT NULL,
City varchar(50) NOT NULL,
Country varchar(50) NOT NULL,
Latitude varchar(50) NOT NULL,
Longitude varchar(50) NOT NULL,
ReveivedDate datetime NOT NULL
)
AS 
BEGIN
    -- Add the SELECT statement with parameter references here
INSERT INTO @noLocationAddress 
SELECT     TOP (100) PERCENT Request1.RequestID, TrackIT.dbo.Sending.Barcode, TrackIT.dbo.Address_View.AdrID, TrackIT.dbo.Address_View.Name, 
                      TrackIT.dbo.Address_View.Street, TrackIT.dbo.Address_View.HouseNo, TrackIT.dbo.Address_View.Postal, TrackIT.dbo.Address_View.City, 
                      TrackIT.dbo.Address_View.Country, Request1.Latitude, Request1.Longitude, Request1.ReceivedDate
FROM         (SELECT DISTINCT RequestID, LTRIM([Content]) AS Barcode, Latitude, Longitude, ReceivedDate
                       FROM          dbo.RequestWithLocation
                       WHERE      (Site LIKE @Site) AND ([Content] <> '') AND (AddressID = '0') AND (ReceivedDate > DATEADD(day, -@ReceivedDate, GETDATE()))) AS Request1 INNER JOIN
                      TrackIT.dbo.Sending ON Request1.Barcode = TrackIT.dbo.Sending.Barcode INNER JOIN
                      TrackIT.dbo.Address_View ON TrackIT.dbo.Sending.DeliveryAdrID = TrackIT.dbo.Address_View.AdrID

ORDER BY TrackIT.dbo.Address_View.AdrID

RETURN

END

您可以看到我有2个参数，并返回一个包含信息的表格。但我需要使用linq来执行此函数。

有人能帮忙吗？谢谢。

- Lahib

Answer 1

我假设你正在使用一个dbml文件（linq to sql）。

从Visual Studio的服务器浏览器中将您的自定义函数拖放到dbml中。

然后，您可以直接从dbml的datacontext对象中调用该函数。

例如，如果您的dbml文件名为xyz.dbml，则您的datacontext对象的名称将是“XyzDataContext”，除非您已更改它。

然后尝试这个。

XyzDataContext db = new XyzDataContext();
List<Fn_GetNoLocationAddressResult> = db.Fn_GetNoLocationAddress("site", 25).ToList();

- Devraj Gadhavi