I used a tutorial online to build a shopping cart for my website. (http://csharpdotnetfreak.blogspot.co...t-example.html) The entire cart works perfectly except that the GridView delete link doesn't do anything. No one commented that they had experienced this issue except me. I have looked over my code and everything seems to be exactly the same as the tutorial.
THe code behind for the cart is:
Code ASP:using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using ShoppingCartActions; using System.Collections.Specialized; using System.Collections; using ShoppingCartActions; public partial class Cart : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Profile.SCart == null) { Profile.SCart = new ShoppingCartActions.Cart(); } if (!Page.IsPostBack) { ReBindGrid(); } if (Profile.SCart.Items == null) { TotalLabel.Visible = false; } } protected void grdCart_RowEditing (object sender, GridViewEditEventArgs e) { grdCart.EditIndex = e.NewEditIndex; ReBindGrid(); } protected void grdCart_RowUpdating (object sender, GridViewUpdateEventArgs e) { TextBox txtQuantity = (TextBox) grdCart.Rows[e.RowIndex].Cells[2].Controls[0]; int Quantity = Convert.ToInt32(txtQuantity.Text); if (Quantity == 0) { Profile.SCart.Items.RemoveAt(e.RowIndex); } else { Profile.SCart.Items[e.RowIndex].Quantity = Quantity; } grdCart.EditIndex = -1; ReBindGrid(); } protected void grdCart_RowCancelingEdit (object sender, GridViewCancelEditEventArgs e) { grdCart.EditIndex = -1; ReBindGrid(); } [B]protected void grdCart_RowDeleting (object sender, GridViewDeleteEventArgs e) { Profile.SCart.Items.RemoveAt(e.RowIndex); ReBindGrid(); }[/B] private void ReBindGrid() { grdCart.DataSource = Profile.SCart.Items; DataBind(); TotalLabel.Text = string.Format("Total:{0,19:C}", Profile.SCart.Total); }
The cart.aspx file that contains the grid is:
Code ASP:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Cart.aspx.cs" Inherits="Cart" %> <%@ Register Src="CartControl.ascx" TagName="CartControl" TagPrefix="uc1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <asp:GridView ID="grdCart" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID" OnRowCancelingEdit="grdCart_RowCancelingEdit" OnRowDeleting="grdCart_RowDeleting" OnRowEditing="grdCart_RowEditing" OnRowUpdating="grdCart_RowUpdating" > <Columns> <asp:BoundField DataField="ProductName" HeaderText="Product" ReadOnly="True"/> <asp:BoundField DataField="Quantity" HeaderText="Quantity"/> <asp:BoundField DataField="Price" DataFormatString="{0:c}" HeaderText="Price" ReadOnly="True" /> <asp:BoundField DataField="SubTotal" DataFormatString="{0:c}" HeaderText="Total" ReadOnly="True" /> <asp:CommandField ShowDeleteButton="True" ShowEditButton="True"/> <asp:TemplateField HeaderText="Remove Item"> <ItemTemplate> <asp:CheckBox id="RemovedProducts" runat="server"></asp:CheckBox> </ItemTemplate> </asp:TemplateField> </Columns> <EmptyDataTemplate> Your Shopping Cart is empty, add items <a href="Products.aspx">Add Products</a> </EmptyDataTemplate> </asp:GridView> <asp:Label ID="TotalLabel" runat="server"></asp:Label> <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="~/Products.aspx">Return to Products Page</asp:HyperLink> </form> </body> </html>
And the shopping cart class file is:
Code ASP:using System; using System.Collections.Generic; namespace ShoppingCartActions { /// <summary> /// Summary description for ShoppingCart /// </summary> [Serializable] public class CartItem { private int _productID; private string _productName; private string _imageUrl; private int _quantity; private double _price; private double _subTotal; public CartItem() { } public CartItem(int ProductID, string ProductName, string ImageUrl, int Quantity, double Price) { _productID = ProductID; _productName = ProductName; _imageUrl = ImageUrl; _quantity = Quantity; _price = Price; _subTotal = Quantity * Price; } public int ProductID { get { return _productID; } set { _productID = value; } } public string ProductName { get { return _productName; } set { _productName = value; } } public string ImageUrl { get { return _imageUrl; } set { _imageUrl = value; } } public int Quantity { get { return _quantity; } set { _quantity = value; } } public double Price { get { return _price; } set { _price = value; } } public double SubTotal { get { return _quantity * _price; } } } [Serializable] public class Cart { private DateTime _dateCreated; private DateTime _lastUpdate; private List<CartItem> _items; public Cart() { if (this._items == null) { this._items = new List<CartItem>(); this._dateCreated = DateTime.Now; } } public List<CartItem> Items { get { return _items; } set { _items = value; } } public void Insert(int ProductID, double Price, int Quantity, string ProductName, string ImageUrl) { int ItemIndex = ItemIndexOfID(ProductID); if (ItemIndex == -1) { CartItem NewItem = new CartItem(); NewItem.ProductID = ProductID; NewItem.Quantity = Quantity; NewItem.Price = Price; NewItem.ProductName = ProductName; NewItem.ImageUrl = ImageUrl; _items.Add(NewItem); } else { _items[ItemIndex].Quantity += 1; } _lastUpdate = DateTime.Now; } public void Update(int RowID, int ProductID, int Quantity, double Price) { CartItem Item = _items[RowID]; Item.ProductID = ProductID; Item.Quantity = Quantity; Item.Price = Price; _lastUpdate = DateTime.Now; } public void DeleteItem(int rowID) { _items.RemoveAt(rowID); _lastUpdate = DateTime.Now; } private int ItemIndexOfID(int ProductID) { int index = 0; foreach (CartItem item in _items) { if (item.ProductID == ProductID) { return index; } index += 1; } return -1; } public struct ShoppingCartUpdates { public int ProductId; public int PurchaseQuantity; public bool RemoveItem; } public double Total { get { double t = 0; if (_items == null) { return 0; } foreach (CartItem Item in _items) { t += Item.SubTotal; } return t; } } } }
Is there something about working with Gridview's delete method that I don't know about?
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