ADO.NET中的sql连接

using System.Data; // Use ADO.NET namespace

using System.Data.SqlClient;

SqlConnection thisConnection = new SqlConnection(

@"Data Source=GY; Initial Catalog=northwind;uid=sa;password=datadog"); //先建立连接

thisConnection.Open();//打开连接

SqlCommand thisCommand = thisConnection.CreateCommand();//直接指定conn的command

也可以这样 // SqlCommand cmd = new SqlCommand();

// cmd.Connection = thisConnection;

cmmand的sql命令

thisCommand.CommandText = "SELECT CustomerID, CompanyName from Customer";

SqlDataReader thisReader = thisCommand.ExecuteReader();//sqldatareader不可以用new 必须直接与command关联

//用reader读出表

while (thisReader.Read())

{

// Output ID and name columns

Console.WriteLine("\t{0}\t{1}",

thisReader["CustomerID"], thisReader["CompanyName"]);

// Close reader 用完要关闭

thisReader.Close();

// Close connection

thisConnection.Close ()

http://www.cnblogs.com/redcar/archive/2006/11/23/569859.html