Hide controls when User visit second time using C# in ASP.Net

Hi KatieNgoc,

Refer below sample.

HTML

CS.aspx

Name :
<asp:TextBox runat="server" ID="txtName" />
<asp:Button ID="Button1" Text="Login" runat="server" OnClick="Login" />

Default.aspx

<asp:Label ID="lblName" runat="server" />
<asp:TextBox runat="server" ID="txtData" />
<asp:Button Text="Print" runat="server" ID="btnPrint" /><br />
<asp:LinkButton ID="LinkButton1" Text="Logout" runat="server" PostBackUrl="~/CS.aspx" />

Namespaces

using System.Configuration;
using System.Data.SqlClient;

Code

CS.aspx.cs

protected void Login(object sender, EventArgs e)
{
    Session["Name"] = txtName.Text;
    Response.Redirect("Default.aspx");
}

Default.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        int count = 0;
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        SqlConnection con = new SqlConnection(constr);
        SqlCommand cmd = null;
        con.Open();
        count = GetCount(count, con, cmd);
        if (count == 0)
        {
            cmd = new SqlCommand("INSERT INTO tblDatas VALUES(@Count,@Name)", con);
            cmd.Parameters.AddWithValue("@Count", count + 1);
            cmd.Parameters.AddWithValue("@Name", Session["Name"].ToString());
            cmd.ExecuteNonQuery();
        }
        else
        {
            cmd = new SqlCommand("UPDATE tblDatas SET Count = @Count WHERE Name = @Name", con);
            cmd.Parameters.AddWithValue("@Count", count + 1);
            cmd.Parameters.AddWithValue("@Name", Session["Name"].ToString());
            cmd.ExecuteNonQuery();
            count = GetCount(count, con, cmd);
            if (count >= 2)
            {
                txtData.Visible = false;
                btnPrint.Visible = false;
            }
        }
        con.Close();
        lblName.Text = Session["Name"].ToString();
    }
}

private int GetCount(int count, SqlConnection con, SqlCommand cmd)
{
    cmd = new SqlCommand("SELECT Count from tblDatas WHERE Name = @Name", con);
    cmd.Parameters.AddWithValue("@Name", Session["Name"].ToString().Trim());
    count = Convert.ToInt16(cmd.ExecuteScalar());
    return count;
}

Screenshot