ASP.NET中连接数据库的各种连接字符串

(一)、在Web.Config中创建连接字符串：

1、

<add name=”ConnectionString” connectionString=”Data Source=./SQLEXPRESS;AttachDbFilename=|DataDirectory|/grade.mdf;Integrated Security=True;User Instance=True” providerName=”System.Data.SqlClient” />

2、

<add name=”sampleConnectionString” connectionString =”server=./SQLEXPRESS;database=sample;uid=sa;pwd=123456;” providerName =”System.Data.SqlClient”/>

3、

<add name =”testConnectionString” connectionString =”Data Source=./SQLEXPRESS;Initial Catalog=sample;Integrated Security=True;Persist Security Info=True;User ID=sa;Password=123456″ providerName =”System.Data.SqlClient”/>

(二)、在aspx.cs中获取连接字符串：

1、

string strCon = System.Configuration.ConfigurationManager.ConnectionStrings[“sampleConnectionString”].ConnectionString;

2、

string strCon = System.Configuration.ConfigurationManager.ConnectionStrings[“sampleConnectionString”].ToString();

3、

string strCon = System.Configuration.ConfigurationManager.ConnectionStrings[“testConnectionString”].ToString();

(三)、将连接字符串直接写到页面里

1、

string strCon = “Data Source=.//SQLEXPRESS;AttachDbFilename=|DataDirectory|//grade.mdf;Integrated Security=True;User Instance=True”;

2、

string strCon = “Data Source=.//SQLEXPRESS;Initial Catalog=sample;Integrated Security=True;Persist Security Info=True;User ID=sa;Password=123456″;

3、

string strCon = “server=.//SQLEXPRESS;database=sample;uid=sa;pwd=123456”;

连接Access数据库(yx.mdb)的方法：

(一)、在Web.Config中创建连接字符串：

<add name =”accessConnectionString” connectionString =”Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/yx.mdb” providerName =”System.Data.OleDb”/>

(二)、在aspx.cs中获取连接字符串：

1、

string strCon = System.Configuration.ConfigurationManager.ConnectionStrings[“accessConnectionString”].ToString();

2、

string strCon = “Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|Datadirectory|//yx.mdb”;

3、

string strCon = “Provider=Microsoft.Jet.OLEDB.4.0;Data Source=” + Server.MapPath(“~/App_Data/yx.mdb”);

注意：如果要连接Access2007版本里的数据库（Database1.accdb）时，用下面的方法连接：

string strCon = “Provider=Microsoft.Ace.OLEDB.12.0;Data Source=” + Server.MapPath(“~/App_Data/Database1.accdb”);