asp snippet

string connectionString = @"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\dbITP.mdf;Integrated Security=True;Connect Timeout=30";
            using (SqlConnection connection = new SqlConnection(connectionString))
            {

                if (comboBox1.Text == "User")
                {
                    sda = new SqlDataAdapter("select * FROM [Table] WHERE (User LIKE '%" + textBox1.Text + "%')", connection);
                    DataTable dt = new DataTable();
                    sda.Fill(dt);
                    tableDataGridView.DataSource = dt;
                }