Question

c#连接SqlServer数据库失败！！代码如下，总是显示数据库连接失败，到底是什么问题

protected void Page_Load(object sender, EventArgs e)
{

try
{
string conn = "Data Source=.;Initial Catalog=hamsum;User ID=zgl;Pwd=123456";
SqlConnection con = new SqlConnection(conn);
string username = Request.Form["username"].ToString();
string pwd = Request.Form["password"].ToString();
try
{
con.Open();
logindao userlogin = new logindao();
if (userlogin.login(con, username, pwd))
{
Response.Redirect("submitnews.aspx");
}
else
{
Response.Write("<script>alert('账号或密码错误！')</script>");
}

}
catch (System.Exception)
{
Response.Write("<script>alert('数据库连接失败！')</script>");
}
finally
{
try
{
con.Close();
}
catch (System.Exception)
{

throw;
};
}

}catch(Exception){
return;
}
}

Answer 1

catch (System.Exception)
               {
                   Response.Write("<script>alert('数据库连接失败！')</script>");
               }

改成

catch (System.Exception ex)
                {
                    Response.Write("<script>alert("+ex.Message+")</script>");
                }