.net学习随笔
sqlconnection对象连接数据库
类的定义:
public sealed calss SqlConetion:DbConnection,ICloneable
构造方法
SqlConnection con = new SqlConnection(strConnection);
//给定包含连接字符串的字符串构造一个实例
SqlConnection con = new SqlConnection();
con.ConnectionString = strConnection;
这两种构造方法是等价的
SqlConnection连接SQL Sever数据库
通过信任模式与本地SQL Sever 数据库连接,连接字符串如下:
Provider = SQLOLEDB; Data Source = mysqlSever;Integrated Security = SSPI;
连接带密码的SQL Sever数据库,连接字符串如下:
Sever = (local);pwd = password; uid = user id; database = mydatabase
Local代表SQL Sever在本地的计算机,如果要连接远程计算机,将它换成远程计机的IP地址或者计算机名称即可。如:Sever = 192.168.1.2
SqlConnection对象实例
string ConnectionString = "Integrated Security = True ;Data Source = .;Initial Catalog = Northwind;";
//使用字符串构造一个SqlConnection实例
SqlConnection conn = new SqlConnection(ConnectionString);
conn.Open //打开连接
Data Source = .;表示连接的数据库;Integrated Security ="True;"表示连接数据库的验证方式为“windows身份验证”;
Initial Catalog =Northwind;"表示连接数据库的名称。