narsil/Tanshu.Accounts.PointOfSale/Products/ProductGroupForm.cs

using System;
using System.Windows.Forms;
using Tanshu.Accounts.Repository;
using Tanshu.Accounts.Entities;
using System.Linq;

namespace Tanshu.Accounts.PointOfSale
{
    public partial class ProductGroupForm : Form
    {
        private Guid? _productGroupID;
        public ProductGroupForm(Guid? productGroupID)
        {
            _productGroupID = productGroupID;
            InitializeComponent();
        }

        private void ProductGroupForm_Load(object sender, EventArgs e)
        {
            if (_productGroupID.HasValue)
            {
                ProductGroup productGroup;
                using (var bi = new ProductGroupBI())
                    productGroup = bi.Get(x => x.ProductGroupID == _productGroupID.Value);
                txtProductGroupID.Text = _productGroupID.Value.ToString();

                txtName.Text = productGroup.Name;
                txtDiscountLimit.Text = productGroup.DiscountLimit.ToString();
                chkModifierCompulsory.Checked = productGroup.IsModifierCompulsory;
                txtGroupType.Text = productGroup.GroupType;
                chkDiscontinued.Checked = productGroup.Discontinued;
            }
            else
            {
                txtProductGroupID.Text = "(Auto)";
                txtName.Focus();
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            var productGroup = IsFormValid();
            if (productGroup != null)
            {
                using (var bi = new ProductGroupBI())
                {
                    if (_productGroupID.HasValue)
                        bi.Update(productGroup);
                    else
                        bi.Insert(productGroup);
                    bi.SaveChanges();
                }
                MessageBox.Show("Update / Save Successful");
                this.Close();
            }
            else
                MessageBox.Show("The form is not valid");
        }
        private ProductGroup IsFormValid()
        {
            var productGroup = new ProductGroup();
            if (_productGroupID.HasValue)
                productGroup.ProductGroupID = _productGroupID.Value;
            if (string.IsNullOrEmpty(txtName.Text.Trim()))
                return null;
            productGroup.Name = txtName.Text.Trim();
            decimal discount;
            if (!decimal.TryParse(txtDiscountLimit.Text, out discount))
                return null;
            if (discount < 0 || discount > 1)
                return null;
            productGroup.DiscountLimit = discount;
            productGroup.IsModifierCompulsory = chkModifierCompulsory.Checked;
            productGroup.Discontinued = chkDiscontinued.Checked;
            if (string.IsNullOrEmpty(txtGroupType.Text.Trim()))
                return null;
            productGroup.GroupType = txtGroupType.Text.Trim();
            return productGroup;
        }
    }
}