Error running webpage which is connected to sql DB

See more:

C#

WPF

Hi guys,

I'm new to programming world. I am facing difficulty when trying to connect C# with sql db using WPF.

What I was trying to do?

Run a webpage which will insert the information in the webpage to the table in db(customer info).
I used the textblock to get the info(s) and add to the DataRow. Then insert the DataRow to the Dataset and finally update db table through SqlDataAdapter.

Source Code:

public partial class Page1 : Page
    {
        public Page1()
        {
            InitializeComponent();
        }
        private void buttonUpdate_Click(object sender, RoutedEventArgs e)
        {
                SqlConnection conn = new SqlConnection();
                
                string connString = "server=gladiator\\sqlexpress; database=MoviesStorage; Integrated Security=SSPI; ";
                conn.ConnectionString = connString;
                conn.Open();

                string commString = "SELECT * FROM Customer_Info";
                SqlCommand comm = new SqlCommand(commString, conn);
                SqlDataAdapter dtAdapter = new SqlDataAdapter(comm);
                SqlCommandBuilder commBuilder = new SqlCommandBuilder(dtAdapter);

                DataSet dtSet = new DataSet();
                dtAdapter.Fill(dtSet, "Customer_Info");

                DataRow dtRow = dtSet.Tables["Customer_Info"].NewRow();
                dtRow["myID"] = textID.Text;
                dtRow["myName"] = textName.Text;
                dtRow["myIC"] = textIC.Text;
                dtRow["myContact"] = textContact.Text;
                dtSet.Tables["Customer_Info"].Rows.Add(dtRow);

                dtAdapter.Update(dtSet, "Customer_Info");
                conn.Close();
        }    
}

The compiler exits without erros. But once I execute, there is an exception message thrown which I do not understand. It happens in line conn.Open().

Exception thrown:
"An unhandled exception of type 'System.Security.SecurityException' occurred in Unknown Module."


Does anyone able to help me on this? Any other link relating to this problem are also appreciated.

Thanks,
Skunhhead