How do I manage to show my button when I have choosed what I want in my GridView
I am using the code belowe. When I have added som stuff in my shoppingcart I want a button to show up where it says checkout.
How do I do that? I dont want it to show up until I have added something in my shoppingcart.
Also when I press this button I want the stuff in it to come with me.
code would be great.
How do I do that? I dont want it to show up until I have added something in my shoppingcart.
Also when I press this button I want the stuff in it to come with me.
code would be great.
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="ProjektFilm" %>
<html>
<head>
<title>ButtonField ButtonType Example</title>
<script language="C#" runat="server">
DataTable Cart;
DataView CartView;
void Page_Load(Object src, EventArgs e)
{
if (!IsPostBack)
{
myGrid.DataSource = (List<Filminfo>)Session["film"];
myGrid.DataBind();
}
if (Session["shoppingSession"] == null)
{
Cart = new DataTable();
Cart.Columns.Add(new DataColumn("Item", typeof(string)));
Cart.Columns.Add(new DataColumn("Price", typeof(string)));
Session["shoppingSession"] = Cart;
}
else Cart = (DataTable)Session["shoppingSession"];
CartView = new DataView(Cart);
shopCart.DataSource = CartView;
shopCart.DataBind();
}
void updateCart(Object src, GridViewCommandEventArgs e)
{
DataRow dr = Cart.NewRow();
// get the row index stored in the CommandArgument property
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 item = selectedRow.Cells[1].Text;
string price = selectedRow.Cells[2].Text;
if (e.CommandName == "AddToCart")
{
dr[0] = item; dr[1] = price;
Cart.Rows.Add(dr);
}
else
{ // remove from Cart
CartView.RowFilter = "Item='" + item + "'";
if (CartView.Count > 0) CartView.Delete(0);
CartView.RowFilter = "";
}
shopCart.DataBind();
}
</script>
</head>
<body>
<div class="header"><h3>ButtonField <span class="hilite">ButtonType</span> Example</h3></div>
<form id="Form1" runat="server">
<table cellpadding="5">
<tr valign="top">
<td><b>Product List</b>
<asp:gridview id="myGrid" runat="server"
cellpadding=5 font-size="8pt"
gridlines="horizontal"
autogeneratecolumns=false
onRowCommand="updateCart">
<headerstyle backcolor="darkslategray"
forecolor="khaki" font-bold />
<rowstyle backcolor="ivory" verticalalign="top" />
<columns>
<asp:boundfield
datafield="Titel"
readonly="true"
headertext="Titel"/>
<asp:boundfield
datafield="Genre"
readonly="true"
headertext="Genre"/>
<asp:boundfield
datafield="Artikelnr"
readonly="true"
headertext="Artikelnr"/>
<asp:boundfield
datafield="Regissor"
readonly="true"
headertext="Regissor"/>
<asp:boundfield
datafield="RentCost"
readonly="true"
headertext="RentCost"/>
<asp:buttonfield
text=" + "
buttontype="button"
commandname="AddToCart" />
<asp:buttonfield
text=" - "
buttontype="button"
commandname="RemoveFromCart" />
</columns>
</asp:gridview>
</td>
<td><b>Shopping Cart</b>
<asp:gridview id="shopCart" runat="server"
cellpadding=5 font-size="8pt"
headerstyle-backcolor="darkslategray"
headerstyle-forecolor="khaki"
headerstyle-font-bold
rowstyle-backcolor="ivory"
rowstyle-verticalalign="top" />
</td></tr>
</table>
</form>
<hr size=1 width=90%>
</body>
</html>
ASKER CERTIFIED SOLUTION
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ok - in the updateCart method - you need to update the session object stick this line in at the end
Session["shoppingSession"]
That should make sure the session has the most upto date Cart object in.
When you say it has nothing in it, is the object null or does the datatable not contain any rows?
Session["shoppingSession"]
That should make sure the session has the most upto date Cart object in.
When you say it has nothing in it, is the object null or does the datatable not contain any rows?
ASKER
well I am not sure. It aint null.......ExtendedPropert
and I cant find anything to get something out of it.
It didnt help putting that line you said either.
and I cant find anything to get something out of it.
It didnt help putting that line you said either.
In the checkOut button click event put a break point on the Response.Redirect("found.a
Can you post the code that gets the session object in the found.aspx page please?
Can you post the code that gets the session object in the found.aspx page please?
ASKER
well the problem is that I cant put any debug in aspx thats why I try to break out the code in my other thread. :-/
aspx
-------------------
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="ProjektFilm.WebForm1" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="ProjektFilm" %>
<html>
<head>
<script language="C#" runat="server">
DataTable Cart;
DataView CartView;
void Page_Load(Object src, EventArgs e)
{
if (!IsPostBack)
{
myGrid.DataSource = (List<Filminfo>)Session["film"];
myGrid.DataBind();
checkOutButton.Visible = false;
}
if (Session["shoppingSession"] == null)
{
Cart = new DataTable();
Cart.Columns.Add(new DataColumn("Title", typeof(string)));
Cart.Columns.Add(new DataColumn("Artikelnr", typeof(string)));
Cart.Columns.Add(new DataColumn("Genre", typeof(string)));
Cart.Columns.Add(new DataColumn("Regissor", typeof(string)));
Cart.Columns.Add(new DataColumn("Rentcost", typeof(string)));
Session["shoppingSession"] = Cart;
}
else Cart = (DataTable)Session["shoppingSession"];
CartView = new DataView(Cart);
shopCart.DataSource = CartView;
shopCart.DataBind();
}
void updateCart(Object src, GridViewCommandEventArgs e)
{
DataRow dr = Cart.NewRow();
// get the row index stored in the CommandArgument property
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 genre = selectedRow.Cells[1].Text;
string artikelid = selectedRow.Cells[2].Text;
string title = selectedRow.Cells[0].Text;
string rentcost = selectedRow.Cells[4].Text;
string regissor = selectedRow.Cells[3].Text;
if (e.CommandName == "AddToCart")
{
dr[0] = title; dr[1] = artikelid;
dr[2] = genre; dr[3] = regissor;
dr[4] = rentcost;
Cart.Rows.Add(dr);
}
else
{ // remove from Cart
CartView.RowFilter = "Title='" + title + "'";
if (CartView.Count > 0) CartView.Delete(0);
CartView.RowFilter = "";
}
if (CartView.Count > 0)
checkOutButton.Visible = true;
else
checkOutButton.Visible = false;
shopCart.DataBind();
Session["shoppingSession"] = Cart;
}
</script>
</head>
<body>
<form id="Form1" runat="server">
<div class="header"><h3>
<img alt="logo" src="image/logo.JPG" style="width: 468px; height: 131px" /></h3>
<h3>
<asp:Label ID="Label" runat="server" Text="Filmen blev hittad. Vill du köpa den?"></asp:Label>
</h3></div>
<table cellpadding="5">
<tr valign="top">
<td><b>Product List</b>
<asp:gridview id="myGrid" runat="server"
cellpadding=5 font-size="8pt"
gridlines="horizontal"
autogeneratecolumns=false
onRowCommand="updateCart">
<headerstyle backcolor="darkslategray"
forecolor="khaki" font-bold />
<rowstyle backcolor="ivory" verticalalign="top" />
<columns>
<asp:boundfield
datafield="Titel"
readonly="true"
headertext="Titel"/>
<asp:boundfield
datafield="Genre"
readonly="true"
headertext="Genre"/>
<asp:boundfield
datafield="Artikelnr"
readonly="true"
headertext="Artikelnr"/>
<asp:boundfield
datafield="Regissor"
readonly="true"
headertext="Regissor"/>
<asp:boundfield
datafield="RentCost"
readonly="true"
headertext="RentCost"/>
<asp:buttonfield
text=" + "
buttontype="button"
commandname="AddToCart" />
<asp:buttonfield
text=" - "
buttontype="button"
commandname="RemoveFromCart" />
</columns>
</asp:gridview>
</td>
<td><b>Shopping Cart</b>
<asp:gridview id="shopCart" runat="server"
cellpadding=5 font-size="8pt"
headerstyle-backcolor="darkslategray"
headerstyle-forecolor="khaki"
headerstyle-font-bold
rowstyle-backcolor="ivory"
rowstyle-verticalalign="top" />
<br />
<asp:Button ID="checkOutButton" runat="server" Text="Checkout"
onclick="checkOutButton_Click" />
</td></tr>
<tr valign="top">
<td> </td>
<td> </td></tr>
</table>
<hr size=1 width=90%>
<br />
<br />
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="~/Default.aspx">Tillbaka</asp:HyperLink>
</form>
</body>
</html>
----------------------
aspx.cs
-----------------------
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Collections.Generic;
namespace ProjektFilm
{
public partial class WebForm1 : System.Web.UI.Page
{
public void checkOutButton_Click(Object src, EventArgs e)
{
Response.Redirect("found.aspx");
}
}
}
what IDE are you using?
ASKER
visual studio 2008
ASKER
Here we go. There wasnt put an title on the page so I couldnt debug. ???? strange but anyway no it works........I got 1 in my Cart.Rows....so that should be ok
so what is the code your using to read the cart in the found.aspx page? can you post that?
ASKER
protected void Page_Load(object sender, EventArgs e)
{
DataTable Cart = (DataTable)Session["shoppi
}
{
DataTable Cart = (DataTable)Session["shoppi
}
ASKER
I cant bring it out. In debug mode it says there is nothing in it.
DataTable Cart = (DataTable)Session["shoppi
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