我配置了web.config，下面是代码：

我在aspx页面中加入如下代码来打开数据库，可不知道为什么老出错误，请高手指点迷津啊，我很急public partial class ConnectionSQLServer : System.Web.UI.Page{ private string myConnectionString=ConfigurationManager.ConnectionStrings["SQLCONNECTIONSTRING"].ConnectionString; protected void Page_Load(object sender, EventArgs e) { if(!Page.IsPostBack) { //TestConnectonSQLServer(); Response.Write(myConnectionString); Response.End(); } } private void TestConnectonSQLServer() { SqlConnection myConnection = new SqlConnection(myConnectionString); try { myConnection.Open(); Response.Write("连接状态：" + (myConnection.State == ConnectionState.Open ? "连接成功！" : "连接失败！") + "
"); } catch (SqlException sqlex) { Response.Write(sqlex.Message + "
"); } finally { myConnection.Close(); } }}