C# searching a Access Database

Question

I have a Access database that i want to search by date my code returns nothing, what am I missing?

 

public partial class MainWindow : Window
    {


        public MainWindow()
        {
            InitializeComponent();
            loadgrid();
            txt_Date.Clear();

        }

        private void loadgrid()
        {
            OleDbConnection con = new OleDbConnection();
            con.ConnectionString = ConfigurationManager.ConnectionStrings["Connection"].ToString();
            con.Open();
            OleDbCommand cmd = new OleDbCommand();
            cmd.CommandText = "Select * from [Sheet1]";
            cmd.Connection = con;
            OleDbDataReader rd = cmd.ExecuteReader();
            dataGrid.ItemsSource = rd;

        }


private void btn_Search_Click(object sender, RoutedEventArgs e)
        {

            OleDbConnection con = new OleDbConnection();
            con.ConnectionString = ConfigurationManager.ConnectionStrings["Connection"].ToString();
            con.Open();
            OleDbCommand cmd = new OleDbCommand();
            cmd.CommandText = "Select * from Sheet1 WHERE ToDay like ('" + txt_Date.Text + "%')";
            cmd.Connection = con;
            OleDbDataReader rd = cmd.ExecuteReader();
            dataGrid.ItemsSource = rd;

            loadgrid();