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

namespace?course
{
????class?Database
????{
????????public?static?string?connStr?=?“Data?Source=.\\SQLEXPRESS;Initial?Catalog=DBSelect;Integrated?Security=true“;
????????//public?static?string?connStr;
????????public?static?SqlConnection?conn?=?new?SqlConnection（connStr）;

????????//“讀”數據的靜態方法
????????public?static?DataSet?GetDataFromDB（string?sqlStr）
????????{
????????????conn.Open（）;
????????????SqlDataAdapter?MyAdapter?=?new?SqlDataAdapter（sqlStrconn）;
????????????DataSet?MyDataSet?=?new?DataSet（）;
????????????MyDataSet.Clear（）;
????????????MyAdapter.Fill（MyDataSet）;
????????????conn.Close（）;
????????????if?（MyDataSet.Tables[0].Rows.Count?!=?0）
????????????{
????????????????return?MyDataSet;
????????????}
????????????else
????????????{
????????????????return?null;
????????????}
????????}
????????//“寫“數據的方法
????????public?static?bool?UpdataDB（string?sqlStr）
????????{
????????????conn.Open（）;
????????????//定義數據命令對象
????????????SqlCommand?myCdm?=?new?SqlCommand（sqlStrconn）;
????????????//設置Command對象的CommandType的屬性
????????????myCdm.CommandType?=?CommandType.Text;
????????????//執行SQl語句
????????????myCdm.ExecuteNonQuery（）;
????????????conn.Close（）;
????????????//數據庫更新成功，返回true
????????????return?true;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????45568??2015-04-25?17:38??course\course\bin\Debug\course.exe

?????文件??????89600??2015-04-25?17:38??course\course\bin\Debug\course.pdb

?????文件??????11600??2015-05-11?16:42??course\course\bin\Debug\course.vshost.exe

?????文件????????490??2010-03-17?22:39??course\course\bin\Debug\course.vshost.exe.manifest

?????文件???????4882??2014-11-23?13:10??course\course\course.csproj

?????文件???????1520??2014-11-18?11:40??course\course\Database.cs

?????文件???????9893??2014-11-23?19:17??course\course\Formcourse.cs

?????文件??????11488??2014-11-23?19:14??course\course\Formcourse.Designer.cs

?????文件???????5817??2014-11-23?19:14??course\course\Formcourse.resx

?????文件????????362??2014-11-23?13:10??course\course\FormHelp.cs

?????文件???????3120??2014-11-23?13:10??course\course\FormHelp.Designer.cs

?????文件???????5817??2014-11-23?13:10??course\course\FormHelp.resx

?????文件???????4442??2014-11-23?13:17??course\course\FormMain.cs

?????文件???????6107??2014-11-23?13:17??course\course\FormMain.Designer.cs

?????文件???????5817??2014-11-23?13:15??course\course\FormMain.resx

?????文件??????11854??2014-12-22?22:20??course\course\FormSelect.cs

?????文件??????14467??2014-11-23?20:14??course\course\FormSelect.Designer.cs

?????文件???????5817??2014-11-23?20:14??course\course\FormSelect.resx

?????文件??????11616??2014-12-22?22:20??course\course\FormStudent.cs

?????文件??????10722??2014-11-23?13:48??course\course\FormStudent.Designer.cs

?????文件???????5817??2014-11-23?13:48??course\course\FormStudent.resx

?????文件???????5026??2014-12-22?22:20??course\course\FrmLogin.cs

?????文件???????4890??2014-11-23?12:56??course\course\FrmLogin.Designer.cs

?????文件???????6011??2014-11-23?12:56??course\course\FrmLogin.resx

?????文件???????2723??2015-05-11?16:42??course\course\obj\x86\Debug\course.csproj.FileListAbsolute.txt

?????文件??????45568??2015-04-25?17:38??course\course\obj\x86\Debug\course.exe

?????文件????????180??2014-11-23?19:16??course\course\obj\x86\Debug\course.Formcourse.resources

?????文件????????180??2014-11-23?19:02??course\course\obj\x86\Debug\course.FormHelp.resources

?????文件????????180??2014-11-23?19:02??course\course\obj\x86\Debug\course.FormMain.resources

?????文件????????180??2014-11-23?20:14??course\course\obj\x86\Debug\course.FormSelect.resources

............此處省略34個文件信息