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1、-窗体顶端一、 从控制台读取东西代码片断：using System;class TestReadConsole public static void Main() Console.Write(Enter your name:); string strName = Console.ReadLine(); Console.WriteLine( Hi + strName); 二、读文件代码片断：using System; using System.IO; public class TestReadFile public static void Main(String args) / Read te*
2、t file C:temptest.t*t FileStream fs = new FileStream(c:temptest.t*t , FileMode.Open, FileAccess.Read); StreamReader sr = new StreamReader(fs); String line=sr.ReadLine(); while (line!=null) Console.WriteLine(line); line=sr.ReadLine(); sr.Close(); fs.Close(); 三、写文件代码：using System; using System.IO; pub
3、lic class TestWriteFile public static void Main(String args) / Create a te*t file C:temptest.t*t FileStream fs = new FileStream(c:temptest.t*t , FileMode.OpenOrCreate, FileAccess.Write); StreamWriter sw = new StreamWriter(fs); / Write to the file using StreamWriter class sw.BaseStream.Seek(0, SeekOr
4、igin.End); sw.WriteLine( First Line ); sw.WriteLine( Second Line); sw.Flush(); 四、拷贝文件：using System;using System.IO;class TestCopyFile public static void Main() File.Copy(c:tempsource.t*t, C:tempdest.t*t ); 五、移动文件：using System;using System.IO;class TestMoveFile public static void Main() File.Move(c:t
5、empabc.t*t, C:tempdef.t*t ); 六、使用计时器：using System;using System.Timers;class TestTimer public static void Main() Timer timer = new Timer(); timer.Elapsed += new ElapsedEventHandler( DisplayTimeEvent ); timer.Interval = 1000; timer.Start(); timer.Enabled = true; while ( Console.Read() != q ) /- public
6、 static void DisplayTimeEvent( object source, ElapsedEventArgs e ) Console.Write(r0, DateTime.Now); 七、调用外部程序：class Test static void Main(string args) System.Diagnostics.Process.Start(notepad.e*e); ADO.NET方面的：八、连接Access数据库：using System;using System.Data;using System.Data.OleDb;class TestADO static vo
7、id Main(string args) string strDSN = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:test.mdb; string strSQL = SELECT * FROM employees ; OleDbConnection conn = new OleDbConnection(strDSN); OleDbmand cmd = new OleDbmand( strSQL, conn ); OleDbDataReader reader = null; try conn.Open(); reader = cmd.E*ec
8、uteReader(); while (reader.Read() ) Console.WriteLine(First Name:0, Last Name:1, readerFirstName, readerLastName); catch (E*ception e) Console.WriteLine(e.Message); finally conn.Close(); 九、连接SQL Server数据库：using System;using System.Data.SqlClient;public class TestADO public static void Main() SqlConn
9、ection conn = new SqlConnection(Data Source=localhost; Integrated Security=SSPI; Initial Catalog=pubs); Sqlmand cmd = new Sqlmand(SELECT * FROM employees, conn); try conn.Open(); SqlDataReader reader = cmd.E*ecuteReader(); while (reader.Read() Console.WriteLine(First Name: 0, Last Name: 1, reader.Ge
10、tString(0), reader.GetString(1); reader.Close(); conn.Close(); catch(E*ception e) Console.WriteLine(E*ception Occured - 0,e); 十、从SQL读数据到*ML：using System;using System.Data;using System.*ml;using System.Data.SqlClient; using System.IO; public class TestWrite*ML public static void Main() String strFile
11、Name=c:/temp/output.*ml; SqlConnection conn = new SqlConnection(server=localhost;uid=sa;pwd=;database=db); String strSql = SELECT FirstName, LastName FROM employees; SqlDataAdapter adapter = new SqlDataAdapter(); adapter.Selectmand = new Sqlmand(strSql,conn); / Build the DataSet DataSet ds = new DataSet(); adapter.Fill(ds, employees); / Get a FileStream object FileStream fs = new FileStream(strFileName,FileMode.OpenOrCreate,FileAccess.Write); / Apply the Write*ml method to write an *ML document ds.Write*ml(fs); fs.Close(); 十一、用ADO添加数据到数据库中：using System;using System
