redirect to next page after fill fields using asp.net?

public partial class Index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
    
}
private void Redirect()

{
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
    SqlCommand cmd = new SqlCommand("select * from SignUpTable where Username=@Username and Password=@Password", con);
    cmd.Parameters.AddWithValue("@Username", txtEmailAddress.Text);
    cmd.Parameters.AddWithValue("@Password", txtPassword.Text);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable();
    da.Fill(dt);

    if (dt.Rows.Count > 0)
    {
        DataRow dr = dt.Rows[0];
        Session["Username"] = dr["Username"].ToString();
        Response.Redirect("Index2.aspx");
    }
}
protected void btnSignup_Click(object sender, EventArgs e)
{
    int userId = 0;
    string constr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SP_SignUpTable"))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@FirstName"", txtFirstName.Text.Trim());
                cmd.Parameters.AddWithValue("@LastName", txtLastName.Text.Trim());
                cmd.Parameters.AddWithValue("@Username",txtEmailAddress.Text.Trim());
                cmd.Parameters.AddWithValue("@Password", txtCreatePassword.Text.Trim());
                cmd.Parameters.AddWithValue("@ConfirmPassword", txtConfirmPassword.Text.Trim());
                cmd.Parameters.AddWithValue("@MobileNumber", txtMobilenumber.Text.Trim());
                cmd.Parameters.AddWithValue("@Area", txtResearch.Text.Trim());
                cmd.Parameters.AddWithValue("@DateOfBirth", txtDOB.Text.Trim());
                cmd.Parameters.AddWithValue("@Gender", RadioButtonList1.Text.ToString());
                cmd.Connection = con;
                con.Open();
                userId = Convert.ToInt32(cmd.ExecuteScalar());
                con.Close();
            }
        }
        string message = string.Empty;
        switch (userId)
        {
            case -1:
                message = "Username already exists.\\n Please choose a different username.";
                break;
            case -2:
                message = "Supplied Email address has already been used.";
                break;
        }

        ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" + message + "');", true);
    }
}
private void Clear()
{
    txtFirstName.Text = txtLastName.Text = txtEmailAddress.Text = txtPassword.Text = txtConfirmPassword.Text = txtMobilenumber.Text = txtResearch.Text = " ";
}
protected void btnLogin_Click(object sender, EventArgs e)
{
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
    con.Open();
    SqlCommand cmd = new SqlCommand("select * from SignUpTable where Username=@Username and Password=@Password", con);
    cmd.Parameters.AddWithValue("@Username", txtEmail.Text);
    cmd.Parameters.AddWithValue("@Password", txtPassword.Text);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable();
    da.Fill(dt);

    if (dt.Rows.Count > 0)
    {
        DataRow dr = dt.Rows[0];
        Session["Username"] = dr["Username"].ToString();
        Response.Redirect("Home Page.aspx");
    }
    else
    {
        ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script launguage='javascript'>alert('Invalid Email and Password')</script>");
    }
}
}