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Grid with button updating cart

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Grid

This is a migrated thread and some comments may be shown as answers.

Jakub asked on 02 Aug 2013, 08:12 AM

cartSample.jpg

Hi,

I'm learning how to update a shopping cart by clicking a button on RadGrid control.

I have a RadMenu on a Master page. One of the menu items contain the cart which I simplify to a single RadButton.
I also have RadAjaxMenager on the Master Page.

RadGrid with the button to update the cart is built dynamically on "Inventory" page linked to my Master page.

For experimenting purposes I would like to increase the number on the button placed in the cart. When I click the button on grid the button on grid should be updated but is not.

Whole concept is taken from your example:
http://demos.telerik.com/aspnet-ajax/ajax/examples/manager/partialajaxification/defaultcs.aspx

The only difference is that I'm building my grid dynamically and I think this is the cause of the problem. I have tried to implement the example using markup and it was fine...

Here is my code for the master Page

<%@ Master Language="VB" CodeFile="MasterPage.master.vb" Inherits="MasterPage" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

<link type="text/css" href="siteStyle.css" rel="stylesheet" />

<asp:ContentPlaceHolder ID="head" runat="server">

</asp:ContentPlaceHolder>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager1" runat="server">

<Scripts>

<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />

<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />

<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />

</Scripts>

</telerik:RadScriptManager>

<script type="text/javascript">

//Put your JavaScript code here.

</script>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadGrid1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1"></telerik:AjaxUpdatedControl>

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

</telerik:RadAjaxLoadingPanel>

<div id="wraper">

<div id="header">

<telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="True"></telerik:RadSkinManager>

</div>

<telerik:RadMenu ID="menu" runat="server" Width="100%" ClientIDMode="Static">

<Items>

<telerik:RadMenuItem runat="server" Text="Home" NavigateUrl="~/Home.aspx">

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="Inventory" NavigateUrl="~/Inventory.aspx">

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="My Account">

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="Support" NavigateUrl="~/Support.aspx">

<Items>

<telerik:RadMenuItem runat="server" Text="FAQ">

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="Shipping">

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="Payments">

</telerik:RadMenuItem>

</Items>

<GroupSettings Flow="Horizontal" />

</telerik:RadMenuItem>

<telerik:RadMenuItem runat="server" Text="Cart">

<Items>

<telerik:RadMenuItem runat="server" Text="SubCart">

<ItemTemplate>

<telerik:RadButton ID="RadButton1" runat="server" Text="1"></telerik:RadButton>

<telerik:RadGrid ID="grdCartItems" runat="server"></telerik:RadGrid>

</ItemTemplate>

</telerik:RadMenuItem>

</Items>

</telerik:RadMenuItem>

</Items>

</telerik:RadMenu>

<div style="clear: both"></div>

<div id="masterContainer">

<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">

</asp:ContentPlaceHolder>

</div>

<div id="footer"></div>

</div>

</form>

</body>

</html>

Code of the "Inventory" page linked to a master

Imports Telerik.Web.UI

Imports System.Data

Partial Class Inventory

Inherits System.Web.UI.Page

Dim grid As New RadGrid

Protected Sub Page_Init(sender As Object, e As EventArgs) Handles Me.Init

CreateGrid()

End Sub

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load

If IsPostBack Then Exit Sub

Dim grid1 As RadGrid = CType(PlaceHolder1.FindControl("RadGrid1"), RadGrid)

Dim ajaxMenager As RadAjaxManager = Master.FindControl("RadAjaxManager1")

ajaxMenager.AjaxSettings.AddAjaxSetting(grid1, grid1)

End Sub

Public Sub CreateGrid()

grid = New RadGrid

grid.ID = "RadGrid1"

grid.Width = Unit.Percentage(100)

grid.PageSize = 15

grid.AllowPaging = True

grid.PagerStyle.Mode = GridPagerMode.NextPrevAndNumeric

grid.AutoGenerateColumns = False

grid.ClientIDMode = UI.ClientIDMode.Static

grid.MasterTableView.Width = Unit.Percentage(100)

grid.MasterTableView.DataKeyNames = New String() {"ID"}

Dim boundColumn As New GridBoundColumn()

boundColumn = New GridBoundColumn()

boundColumn.DataField = "Code"

boundColumn.HeaderText = "Code"

grid.MasterTableView.Columns.Add(boundColumn)

Dim tableViewOrders As GridTableView

tableViewOrders = New GridTableView(grid)

tableViewOrders.Width = Unit.Percentage(100)

boundColumn = New GridBoundColumn()

boundColumn.DataField = "Code"

boundColumn.HeaderText = "Code"

tableViewOrders.Columns.Add(boundColumn)

Dim toCartCollumn As New GridTemplateColumn

toCartCollumn = New GridTemplateColumn

toCartCollumn.ItemTemplate = New MyTemplate()

toCartCollumn.UniqueName = "TemplateColumn1"

toCartCollumn.DataField = "Code11"

tableViewOrders.Columns.Add(toCartCollumn)

grid.MasterTableView.DetailTables.Add(tableViewOrders)

AddHandler grid.NeedDataSource, AddressOf RadGrid1_NeedDataSource

AddHandler grid.DetailTableDataBind, AddressOf RadGrid1_DetailTableDataBind

AddHandler grid.ItemCommand, AddressOf RadGrid1_ItemCommand

AddHandler grid.ItemCreated, AddressOf RadGrid1_ItemCreated

PlaceHolder1.Controls.Add(grid)

End Sub

Private Sub RadGrid1_DetailTableDataBind(ByVal source As Object, ByVal e As GridDetailTableDataBindEventArgs)

Dim list As List(Of Listing) = grid.DataSource

Dim dataItem As GridDataItem = CType(e.DetailTableView.ParentItem, GridDataItem)

Dim id As Integer = dataItem.GetDataKeyValue("ID")

Dim detailList = (From l In list Where l.ID = id Select l.Items).First.ToList

e.DetailTableView.DataSource = detailList

End Sub

Public Function CreateListings(itemsCount As Integer) As List(Of Listing)

Dim list As New List(Of Listing)

For i = 0 To itemsCount

list.Add(New Listing(i))

Next

Return list

End Function

Protected Sub RadGrid1_ItemCommand(sender As Object, e As GridCommandEventArgs)

If e.CommandName = "AddToCart" Then

Dim menu As RadMenu = Master.FindControl("menu")

Dim buttonToUpdate As RadButton = menu.FindItemByText("SubCart").FindControl("RadButton1")

buttonToUpdate.Text = CInt(buttonToUpdate.Text) + 1

End If

End Sub

Protected Sub RadGrid1_ItemCreated(sender As Object, e As GridItemEventArgs)

If TypeOf e.Item Is GridDataItem Then

If e.Item.DataItem Is Nothing Then Exit Sub

If e.Item.DataItem.GetType.Name = "ListingItem" Then

Dim dataItem As GridDataItem = TryCast(e.Item, GridDataItem)

Dim tc As TableCell = dataItem("TemplateColumn1")

Dim button As Button = tc.FindControl("ibtnAddToCart")

Dim ajaxMenager As RadAjaxManager = Master.FindControl("RadAjaxManager1")

Dim menu As RadMenu = Master.FindControl("menu")

Dim buttonToUpdate = menu.FindItemByText("SubCart").FindControl("RadButton1")

ajaxMenager.AjaxSettings.AddAjaxSetting(button, buttonToUpdate)

End If

End Sub

Protected Sub RadGrid1_NeedDataSource(sender As Object, e As GridNeedDataSourceEventArgs)

grid.DataSource = CreateListings(15)

End Sub

Private Class MyTemplate

Implements ITemplate

Protected ibtnAddToCart As Button

Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements ITemplate.InstantiateIn

ibtnAddToCart = New Button()

ibtnAddToCart.ID = "ibtnAddToCart"

AddHandler ibtnAddToCart.DataBinding, AddressOf boolValue_DataBinding

ibtnAddToCart.CommandName = "AddToCart"

container.Controls.Add(ibtnAddToCart)

End Sub

Sub boolValue_DataBinding(ByVal sender As Object, ByVal e As EventArgs)

Dim cBox As Button = DirectCast(sender, Button)

Dim container As GridDataItem = DirectCast(cBox.NamingContainer, GridDataItem)

Dim listingitem = DirectCast(container.DataItem, ListingItem)

cBox.Text = listingitem.Code

End Sub

End Class

I also attach a screen of the sample app
jacob

2 Answers, 1 is accepted

answered on 06 Aug 2013, 05:05 PM

Hi Jakub,

Can you try moving the code with which you find the RadButton1 and add it as an updated control from RadGrid ItemCreated event to Page_Load? Note that it is recommended to add AJAX settings dynamically in a Page event handler, which is executed each time during the page lifecycle (Page_Load, Page_PreRender) so that the control could be ajaxified when the page is initially loaded.

Give this suggestion a try and see if it helps.

Regards,
Pavlina
Telerik

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