using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Data;
using?System.Data.SqlClient;

namespace?shangpingliulan
{
????class?DBHelper
????{
????????//數(shù)據(jù)庫鏈接字符串
????????public?static?string?ConnString?=?“Data?Source=.;Initial?Catalog=NIKEDB;Integrated?Security=True“;


????????//數(shù)據(jù)庫鏈接對象
????????private?static?SqlConnection?Conn?=?null;

????????//初始化數(shù)據(jù)庫鏈接
????????private?static?void?InitConnection（）
????????{
????????????if?（Conn?==?null）
????????????????Conn?=?new?SqlConnection（ConnString）;
????????????if?（Conn.State?==?ConnectionState.Closed）
????????????????Conn.Open（）;
????????????if?（Conn.State?==?ConnectionState.Broken）
????????????{
????????????????Conn.Close（）;
????????????????C

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-12-05?16:16??cccc整合版\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\
?????文件?????5242880??2016-10-25?11:16??cccc整合版\cccc整合版\Nike.mdf
?????文件?????2097152??2016-10-25?11:16??cccc整合版\cccc整合版\Nike_log.ldf
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\visual?studio?2012\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\Visual?Studio?2012Templates\
?????目錄???????????0??2016-05-13?08:57??cccc整合版\cccc整合版\Visual?Studio?2012Templates\ItemTemplates\
?????目錄???????????0??2016-05-13?08:57??cccc整合版\cccc整合版\Visual?Studio?2012Templates\ProjectTemplates\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\visual?studio?2012\Settings\
?????文件??????214545??2016-05-18?15:24??cccc整合版\cccc整合版\visual?studio?2012\Settings\CurrentSettings-2014-10-07.vssettings
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\%vsspv_visualstudio_dir%\
?????目錄???????????0??2015-11-23?18:52??cccc整合版\cccc整合版\窗體界面\%vsspv_visualstudio_dir%\Projects\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\.vs\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\.vs\窗體界面\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\.vs\窗體界面\v14\
?????文件???????75264??2016-10-25?10:46??cccc整合版\cccc整合版\窗體界面\.vs\窗體界面\v14\.suo
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\shangpingliulan\
?????文件?????????187??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\App.config
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\
?????目錄???????????0??2016-12-05?16:16??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\
?????文件??????478208??2016-05-13?12:00??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.exe
?????文件?????????187??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.exe.config
?????文件??????187904??2016-05-13?12:00??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.pdb
?????文件???????22696??2016-10-25?10:42??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.vshost.exe
?????文件?????????187??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.vshost.exe.config
?????文件?????????490??2016-07-16?19:44??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Debug\shangpingliulan.vshost.exe.manifest
?????目錄???????????0??2015-11-23?18:51??cccc整合版\cccc整合版\窗體界面\shangpingliulan\bin\Release\
?????文件??????????60??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\ClassDiagram1.cd
?????文件????????2303??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\DBHelper.cs
?????文件?????????397??2016-05-11?16:05??cccc整合版\cccc整合版\窗體界面\shangpingliulan\LoginInfo.cs
............此處省略549個文件信息