1.首先新建一个空的解决方案,并添加一个类库,代码如下,编译并生产dll using System; using System.Collections.Generic; using System.Data.SqlTypes; using System.Linq; using System.Text; namespace TEST { public class TestTrans { [Microsoft.SqlServer.Server.SqlFunction] public static SqlString GenerateDecryptString(string name) { string decode = string.Empty; decode = string.Format("HELLO WORLD {0}!", name);//DecryptString(dataXML.Value); SqlString sqlValue = new SqlString(decode); return sqlValue; } } } 2.启用CLR功能 默认情况下,SQL Server中的CLR是关闭的,所以我们需要执行如下命令打开CLR: exec sp_configure 'clr enabled',1 reconfigure Go 3.将程序集引用到数据库中 CREATE ASSEMBLY testHelloWorld FROM 'C:TEST.dll' --('C:/TEST.dll'w为错误写法) 4.创建函数 CREATE FUNCTION dbo.clrHelloWorld ( @name as nvarchar(200) ) RETURNS nvarchar(200) AS EXTERNAL NAME testHelloWorld.[TEST.TestTrans].GenerateDecryptString 5.调用函数 SELECT dbo.clrHelloWorld('耿耿') 6.执行结果 HELLO WORLD 耿耿!