How to insert data in service-based database?

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C#

entity-framework

I can't seem to insert data into my table using a service-based database in C# Express. I am using Entity-Framework and I have the following code. But when I refresh the table in the database explorer, no data is found.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace CoffeeShopProject
{
    public partial class AddProduct : Form
    {
        private CoffeeShopDatabaseEntities cse = new CoffeeShopDatabaseEntities();
        private Byte[] byteBLOBData;

        public AddProduct()
        {
            InitializeComponent();
            cboCategory.DataSource = cse.tblProductTypes;
            cboCategory.DisplayMember = "Description";
            cboCategory.ValueMember = "ProductType";
        }

        private void btnUpload_Click(object sender, EventArgs e)
        {
            DialogResult result = openFileDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                FileStream fsBLOBFile = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
                byteBLOBData = new Byte[fsBLOBFile.Length];
                fsBLOBFile.Read(byteBLOBData, 0, byteBLOBData.Length);
                fsBLOBFile.Close();
                MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
                pxbImage.Image = Image.FromStream(stmBLOBData);
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            tblProduct products = new tblProduct();
            products.Description = txtDescription.Text;
            products.Price = int.Parse(txtPrice.Text);
            products.Image = byteBLOBData;
            products.ProductType = (int)cboCategory.SelectedValue;
            cse.SaveChanges();
            MessageBox.Show("Record Saved!");
        }
    }
}

What I have tried:

I have not tried anything yet. Just this. I have been searching online for solutions since last night but to no avail I have found none.