C#连接Access与SQL Server

1 string strConnection = "Provider=Microsoft.Ace.OleDb.12.0; Data Source=" + Server.MapPath("~\\App_Data\\db1.accdb");
2
3 OleDbConnection cnn;
4 OleDbCommand cmd;
5 OleDbDataReader datar;
6
7 string str_sql = "select * from T_product where ID=0;";
8 cnn = new OleDbConnection(strConnection);
9 cnn.Open();
10 cmd = new OleDbCommand(str_sql, cnn);
11 datar = cmd.ExecuteReader();
12
13 while (datar.Read())
14 {
15      //do something
16 }
17
18 cnn.Close();

<connectionStrings>
<add name="ApplicationServices"
connectionString="Server=(local);Integrated Security=SSPI;database=TestServer;uid=***;pwd=***" providerName="System.Data.SqlClient"/>
</connectionStrings>

1 string setting = "ApplicationServices";
2 var connString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings[setting];
3
4             SqlConnection conn = new SqlConnection(connString.ConnectionString);
5             SqlCommand cmd;
6             SqlDataReader datar;
7             string str_sql = "select * from T_category;";
8             conn.Open();
9             cmd = new SqlCommand(str_sql, conn);
10             datar = cmd.ExecuteReader();
11             while (datar.Read())
12
13             {
14                   // do something
15             }
16             conn.Close();