ado.net_sqlconnection

一.连接方式：

1.直连：  

 string constr="Server=(local);DataBase=iNetFramework;Uid=client_sa;Pwd=turing";
   SqlConnection conn=new SqlConnection(constr);

 

2.通过配置webconfig的appSettings:

<appSettings>
   <add key="test" value="server=(local);database=xxx;uid=xxx;pwd=xxx"/>
</appSettings>

 string constr=ConfigurationSetting.AppSettings["test"];
   SqlConnection conn=new SqlConnection(constr);

 

3.通过配置connectiongStrings:

<connectionStrings>
  <add name="test" connectionString="Data Source=(local);Initial Catalog=xxx;Persist Security Info=True;User ID=sa;Password=xxx;Pooling=False" providerName="System.Data.SqlClient"/>
 </connectionStrings>

string constr=ConfigurationManager.ConnectionStrings["JaneConnection"].ConnectionString

SqlConnection conn=new SqlConnection(constr);