摘要：
use testset nocount onif object_id('Dept','U') isnotnulldrop table Deptgocreate table Dept(ID int,ParentID int,Name varchar(20)) insert into Dept select 1,0,'AA' insert into Dept select 2,1,'BB' insert into Dept select 3,1,'CC' insert into Dept select 4,2,' 阅读全文
摘要：
首先添加命名空间和相关的代码，如下：using System.Runtime.InteropServices; [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)] private static extern int mciSendString( string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback ... 阅读全文