Added Inventory Exception Handling

Inventory/Inventory.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.10.35013.160
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Inventory", "Inventory\Inventory.csproj", "{4577FB12-6D99-4CAF-863A-38C6CE029D6E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4577FB12-6D99-4CAF-863A-38C6CE029D6E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4577FB12-6D99-4CAF-863A-38C6CE029D6E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4577FB12-6D99-4CAF-863A-38C6CE029D6E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4577FB12-6D99-4CAF-863A-38C6CE029D6E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {73B855CE-4A89-4E67-8CDB-40178284917B}
+	EndGlobalSection
+EndGlobal

Inventory/Inventory/CurrencyFormatException.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Inventory
+{
+    public class CurrencyFormatException : Exception
+    {
+        public CurrencyFormatException(string currency) : base(currency) { }
+    }
+}

Inventory/Inventory/Form1.cs

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+using System.Text.RegularExpressions;
+using System.Xml.Linq;
+
+namespace Inventory
+{
+    public partial class frmAddProduct : Form
+    {
+        BindingSource showProductList;
+        private int _Quantity;
+        private double _SellPrice;
+        private string _ProductName, _Category, _MfgDate, _ExpDate, _Description;
+
+        public frmAddProduct()
+        {
+            InitializeComponent();
+            showProductList = new BindingSource();
+        }
+
+        private void label4_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private void frmAddProduct_Load(object sender, EventArgs e)
+        {
+            string[] ListOfProductCategory = new string[] {
+                "Beverages",
+                "Bread/Bakery",
+                "Canned/Jarred Goods",
+                "Dairy",
+                "Frozen Goods",
+                "Meat",
+                "Personal Care",
+                "Other"
+            };
+
+            foreach (string items in ListOfProductCategory)
+            {
+                cbCategory.Items.Add(items);
+
+            }
+        }
+
+        public string Product_Name(string name)
+        {
+            if (!Regex.IsMatch(name, @"^[a-zA-Z]+$"))
+            {
+                throw new StringFormatException("");
+            }
+
+            return name;
+        }
+        public int Quantity(string qty)
+        {
+            if (!Regex.IsMatch(qty, @"^[0-9]"))
+            {
+                throw new NumberFormatException("");
+            }
+
+            return Convert.ToInt32(qty);
+        }
+        public double SellingPrice(string price)
+        {
+            if (!Regex.IsMatch(price.ToString(), @"^(\d*\.)?\d+$"))
+            {
+                throw new CurrencyFormatException("");
+            }
+            return Convert.ToDouble(price);
+        }
+
+        private void btnAddProduct_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _ProductName = Product_Name(txtProductName.Text);
+                _Category = cbCategory.Text;
+                _MfgDate = dtPickerMfgDate.Value.ToString("yyyy-MM-dd");
+                _ExpDate = dtPickerExpDate.Value.ToString("yyyy-MM-dd");
+                _Description = richTxtDescription.Text;
+                _Quantity = Quantity(txtQuantity.Text);
+                _SellPrice = SellingPrice(txtSellPrice.Text);
+                showProductList.Add(new ProductClass(_ProductName, _Category, _MfgDate, _ExpDate, _SellPrice, _Quantity, _Description));
+                gridViewProductList.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+                gridViewProductList.DataSource = showProductList;
+            }
+            catch (StringFormatException err)
+            {
+                MessageBox.Show(err.Message);
+            }
+            catch (CurrencyFormatException err1)
+            {
+                MessageBox.Show(err1.Message);
+            }
+            catch (NumberFormatException err2)
+            {
+                MessageBox.Show(err2.Message);
+            }
+        }
+    }
+}