数据库的KEY值应用

在网页中引用
public string sqlcon = ConfigurationSettings.AppSettings["FascinationZj"].ToString();

 

在Web.Config中增加的Key值
<appSettings>
    <add key="FascinationZj" value="Data Source=.\SQLEXPRESS;DATABASE=FascinationZj;Integrated Security=True"/>
  </appSettings>

 

 SqlConnection sqlcon = new SqlConnection();
  sqlcon.ConnectionString = ( ConfigurationSettings.AppSettings["FascinationZj"].ToString());
        sqlcon.Open();