anyone can help me to fix the index error?

1 , 2 , 3 , 4 , 5 Kuala Lumpur, Malaysia
  • 8 years ago

    <%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="shoppingCart1.aspx.cs" Inherits="shoppingCart1" Title="Untitled Page" %>

        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns = "false" OnRowCommand="updateCart" >
        <Columns>
    
        <asp:TemplateField>
        <ItemTemplate>
            <asp:Table ID="Table1" runat="server" Width="900px">
            <asp:TableRow><asp:TableCell Width="400px">
            <asp:Image ID="Image3" Height = "300px" Width = "300px" runat="server" ImageUrl = '<%# Bind("img_category", "imageRetrieve.aspx?ImageID={0}")%>' />
            </asp:TableCell>
            <asp:TableCell>Product Name: <%# Eval("img_name")%><br />
                                    Product Category: <%# Eval("img_category")%><br />
                                    Product Quantity: <%# Eval("img_quantity")%><br />
                                    Product Price: <%# Eval("img_price")%><br />
            <asp:Button ID="Button1" runat="server" Text="Add To Cart" CommandName="AddToCart" />
            </asp:TableCell>
    
            </asp:TableRow>
            </asp:Table>
        </ItemTemplate>
        </asp:TemplateField>
        </Columns>
    </asp:GridView>
    
    
    <asp:GridView ID="shopCart" runat="server">
    
    
    </asp:GridView>
    

    using System; using System.Collections; using System.Configuration; using System.Data; using System.Data.SqlClient; using System.Collections; using System.Configuration; using System.ComponentModel; using System.Data; using System.Data.SqlClient; using System.Drawing; using System.IO; using System.Linq; using System.Web; using System.Web.Configuration; using System.Web.Security; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq;

    public partial class shoppingCart1 : System.Web.UI.Page { DataTable Cart; DataView CartView;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            GetInventory();
        }
    
        if (Session["shoppingSession"] == null)
        {
            Cart = new DataTable();
            Cart.Columns.Add(new DataColumn("img_name", typeof(string)));
            Cart.Columns.Add(new DataColumn("img_category", typeof(string)));
            Cart.Columns.Add(new DataColumn("img_quantity", typeof(string)));
            Cart.Columns.Add(new DataColumn("img_price", typeof(string)));
            Session["shoppingSession"] = Cart;
        }
        else Cart = (DataTable)Session["shoppingSession"];
    
        CartView = new DataView(Cart);
        shopCart.DataSource = CartView;
        shopCart.DataBind();
    }
    protected void GetInventory()
    {
        SqlConnection con = new SqlConnection(WebConfigurationManager.ConnectionStrings["JSLighting"].ConnectionString);
        SqlCommand cmd = new SqlCommand("SELECT * FROM Image", con);
    
        SqlDataAdapter adapter = new SqlDataAdapter(cmd);
        DataTable data = new DataTable();
    
        cmd.CommandType = CommandType.Text;
        cmd.Connection = con;
        try
        {
            con.Open();
            adapter.SelectCommand = cmd;
            adapter.Fill(data);
    
            GridView1.DataSource = data;
            GridView1.DataBind();
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
        finally
        {
            con.Close();
            adapter.Dispose();
            con.Dispose();
            data.Dispose();
        }
    }
    protected void updateCart(Object src, GridViewCommandEventArgs e)
    {
        DataRow dr = Cart.NewRow();
    
        // get the row index stored in the CommandArgument property
        // error occur here
        int index = Convert.ToInt32(e.CommandArgument);
    
        // get the GridViewRow where the command is raised
        GridViewRow selectedRow = ((GridView)e.CommandSource).Rows[index];
    
        // for bound fields, values are stored in the Text property of Cells [ fieldIndex ]
        string name = selectedRow.Cells[1].Text;
        string category = selectedRow.Cells[2].Text;
        string quantity = selectedRow.Cells[3].Text;
        string price = selectedRow.Cells[4].Text;
    
        if (e.CommandName == "AddToCart")
        {
            dr[0] = name;
            dr[1] = category;
            dr[2] = quantity;
            dr[3] = price; 
            Cart.Rows.Add(dr);
        }
        else
        {  
            // remove from Cart
            CartView.RowFilter = "img_name='" + name + "'";
            if (CartView.Count > 0) CartView.Delete(0);
            CartView.RowFilter = "";
        }
        shopCart.DataBind();
    }
    

    }

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