ADO.NET入门学习备忘

 

//连接字符串_直接写
string conStr = "Data Source=computer;Initial Catalog=AdoTest;Integrated Security=True; Persist Security Info=True;";

//连接字符串_写在Web.Config里
string conStr = System.Configuration.ConfigurationManager.ConnectionStrings["constring"].ToString();
//Web.Config里设置
<connectionStrings>
    <add name="constring" connectionString="Data Source=visingcomputer;Initial Catalog=AdoTest;Integrated Security=True; Persist Security Info=True;"/>
  </connectionStrings>

//连接数据库
        string conStr =System.Configuration.ConfigurationManager.ConnectionStrings[1].ToString();
        SqlConnection sqlCon = new SqlConnection(conStr);
        sqlCon.Open();
        this.Label1.Text = sqlCon.State.ToString();

        //插入数据
        string sqlIntoCmd="insert into info values('123','地理学','g')";
        SqlCommand sqlInto = new SqlCommand(sqlIntoCmd, sqlCon); 
        sqlInto.ExecuteNonQuery();  //这句执行后,数据才真正插入数据库中.

        sqlCon.Close();