RadMultiPage Load on demand

[tri]

I am using Telerik Controls 2011.1.315.35

We have a load on demand RadMultiPage linked with a RadToolBar

There are several pages and it successfully loads only the page I require when it first loads.

The problem occurs when I click on the tool bar to open another page, the page loads correctly but at the same time it will load the original page again as well, losing any of the values that have been changed in that page.

If I click back to the original page and change a value and then click back to the 2nd page I opened then all is well and the 1st page will not reload. 

The tool bar click is controlled by a JavaScript function

 function onButtonClicked(sender, args)
 {
var multipage=$find("MultpageView");
        var ajaxManager = $find('<%= RadAjaxManager1.ClientID %>');
        var pageView = multipage.findPageViewByID(args.get_item().get_value())
                
        if(pageView ==null)
        {
                    ajaxManager.ajaxRequest(args.get_item().get_value());  
         }
         else
         {
                    pageView.set_selected(true);
                    ResizeFrame();
         }
}

This is working and the new page will only be added to the MultiPage if it hasn't already been added. What I need to do is prevent the Pages that have been added from reloading and losing any values that have been changed.

Each page is contained in its own control that is added to the new page


Ajax Call on Server side is as follows
 Protected Sub RadAjaxManager1_AjaxRequest(ByVal sender As Object, ByVal e As AjaxRequestEventArgs) Handles  RadAjaxManager1.AjaxRequest
        AddPageView(e.Argument)
End Sub

Private Sub AddPageView(ByVal pageViewID As String)
        Dim pageView As New RadPageView()
        pageView.ID = pageViewID
        If MultpageView.FindPageViewByID(pageViewID) Is Nothing Then
            MultpageView.PageViews.Add(pageView)
        End If
End Sub

When the new Page View is created the control is added using the PageVIewCreated event

Protected Sub MultpageView_PageViewCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadMultiPageEventArgs) Handles MultpageView.PageViewCreated
        Dim UserControlName As String = e.PageView.ID + ".ascx"
        Dim userControl As Control = Page.LoadControl("PageControls/" & UserControlName)
        userControl.ID = e.PageView.ID + "_userControl"
        e.PageView.Controls.Add(userControl)
        MultpageView.FindPageViewByID(e.PageView.ID).Selected = True
End Sub

[tri]

Any solutions?

[Dimitar Terziev]

Hello Tri,

I've prepared a sample page based on the code snippets provided. Please try to follow the same approach in your scenario.

All the best,
Dimitar Terziev
the Telerik team

[tri]

Thanks for your help I will have a look at what you have done

[tri]

This is what I have already but the controls are ascx files
Could it be this that is causing the issue

The ascx controls basically have code similar to the following

<table border="0" cellpadding="0 " cellspacing="0" style="width: 100%;border: 0" id="WorkflowAudit">
    <tr style="height: 27px; width: 100%" class="qsfexHeader">
        <td style="width:100%; background-color:#BFDBFF" class="VIEWBOXCAPTION14" >
            Workflow AuditLog
        </td>
    </tr>
    <tr style="height: 100%;">
        <td style="width: 100%; height: 100%" colspan="2" valign="top">
            <iframe id="fraWorkFlowAudit" src="../TaskView/WF_FSAuditLog.aspx?ProcId=<%= ProcessInstanceId %>"  width="100%" height="100%" frameborder="0" scrolling="no" ></iframe>
        </td>
    </tr>
</table>

Each page will reload every time I load a new page view

[tri]

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not Page.IsPostBack Then
             'do something
              AddItemsToMenu()
    End If
End Sub

In addition the Toolbar is dynamically created but we do a postback

[tri]

Ok an update, i have taken your example created 3 controls ascx and in one of these controls placed an iframe that called a page.

The controls that didn't have an iframe retained their values but the control that had iframe lost its values and was reloaded, do you know of a way around this.

Thanks

[Dimitar Terziev]

Hi Tri,

The experienced behavior is expected one. The ContentUrl property of the RadPageView is usually used to reference external pages. Whenever such PageView is set to visible a get request is made to load the content. You can't retain the state of the controls to a page which you reference using get request.

Regards,
Dimitar Terziev
the Telerik team