1、開啟VS2010 新建專案->類庫->AdditionalMD5

2、1.建立類(函式)方法->FunctionMD5

   2.建立類(儲存過程)方法->GetMD5

3、然後在SQL SERVER 資料庫中操作

1.目標資料庫例項需要啟用clr整合

exec sp_configure 'clr enabled', 1;--在SQL Server中啟用CLR 
reconfigure; 
go

ALTER DATABASE [IPVA_Builder] SET TRUSTWORTHY ON

CREATE ASSEMBLY MySqlCLR FROM 'F:\練習\AdditionalMD5\AdditionalMD5\bin\Debug\AdditionalMD5.dll'
 

--從CLR程式集中建立函式，函式名為FunctionGetMD5有三個引數， 
--[SqlCLR]是SQL Server中程式集名 
--[AdditionalMD5.FunctionMD5]是.NET中的類的全名（名稱空間及類名） 
--[FunctionGetMD5]是.NET中類的函式名 

CREATE FUNCTION [dbo].[FunctionGetMD5]  
(  
	@path AS NVARCHAR(max)
)  
RETURNS [nvarchar] ( 128) WITH EXECUTE AS CALLER 
AS  
EXTERNAL NAME [MySqlCLR].[AdditionalMD5.FunctionMD5].GetMD5HashFromFile
GO
 

CREATE PROCEDURE [dbo].[ProcedureGetMD5]  
(  
	@path AS NVARCHAR(max),
	@formExt AS NVARCHAR(50),
	@ToExt AS NVARCHAR(50)
) 
AS  
EXTERNAL NAME [MySqlCLR].[AdditionalMD5.GetMD5].GetMD5HashFromFile 
GO 

ALTER ASSEMBLY [MySqlCLR]
WITH PERMISSION_SET = UNSAFE
 

7.呼叫儲存過程和函式方法

EXEC  [dbo].[ProcedureGetMD5] @path='D:\Backup\桌面\test.tmp',@formExt='tmp',@ToExt='bak'

SELECT [dbo].[FunctionGetMD5]('D:\Backup\桌面\test.tmp')