using System;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page 
{
    //public string connectionString = "Data Source=local;Initial Catalog=webproms;Integrated Security=True";
    public string connectionString="Data Source=THIS-9110C42D72\\SQLEXPRESS;Initial Catalog=webproms;Integrated Security=True";

    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack == true)
        {
        }
        else
        {
        }
    }

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        LabelAccountCreated.Visible = false;
        bool usermatch = false;
        SqlConnection conn = new SqlConnection(connectionString);
        conn.Open();
        String sqlstring = "SELECT accountUsername FROM accounts WHERE (accountUsername = '" + txtUsername.Text + "')";
        SqlCommand checkUsername = new SqlCommand(sqlstring, conn);
        SqlDataReader usernames = checkUsername.ExecuteReader();

        while (usernames.Read())
        {
            if (usernames["accountUsername"].ToString() == txtUsername.Text)
            {
                usermatch = true;
                break;
            }
        }

        if (usermatch)
        {
            LabelUsernameError.Visible = true;
            if (accountCreated.Value == "-1")
            {
                rfvUsername.Visible = true;
                rfvUsername.Text = "Username already taken";
            }
            else
            {
                accountCreated.Value = "0";
            }

            PanelAccountCreation.Visible = true;
            PanelLogin.Visible = false;
        }
        else
        {
            webpromsDataSource.Insert();
            PanelAccountCreation.Visible = false;
            PanelLogin.Visible = true;
        }
        usernames.Close();
        conn.Close();
    }
}