C#与SQL Server 2000实现无限级菜单
//tree.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Threading;
public partial class MenuTree : System.Web.UI.Page
{
SqlDataAdapter da = null;
SqlConnection con = new SqlConnection("server=test;database=DQYPSite_oa;uid=sa;pwd=mfeilgm");
int i = 0;
int count = 0;
int proID = 0;
int column = 0;
string nextClassParentID;
string nextnode;
ArrayList columD = new ArrayList();
DataSet TreeTable = new DataSet();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string cmdStr = "select * from YP_FileClass order by ClassID";
da = new SqlDataAdapter(cmdStr, con);
da.Fill(TreeTable,"ClassForlder");
this.count = TreeTable.Tables["ClassForlder"].Rows.Count;
if (this.count > 0)
{
CreatNode(i);
}
els
相关文档：
http://www.cnblogs.com/dwjaissk/archive/2006/07/25/459476.aspx
增加字段
alter table docdsp add dspcode char(200)
删除字段
ALTER TABLE
table_NAME DROP COLUMN column_NAME
修改字段类型
ALTER TABLE table_name
ALTER COLUMN column_name new_data_type
改名
sp_rename
更改当前数据库中 ......
asp.net(C#)实现SQL2000数据库备份和还原
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.Htm ......
在工作中遇到一个问题,是需要sql递归查询的.不懂,于是到csdn上去问,那里的效率真是非常高,我以前也没在上面问过问题.
问题描述:
我有一个表结构如下:
id upperid
1 2
3 2
4 1
5 3
具体层次不知道,我想用递归sql� ......
Student(S#,Sname,Sage,Ssex) 学生表
Course(C#,Cname,T#) 课程表
SC(S#,C#,score) 成绩表
Teacher(T#,Tname) 教师表
问题：
1、查询“001”课程比“002”课程成绩高的所有学生的学号；
select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
& ......
