Hello Telerik Team,

Kindly, I got an error regarding the casting of a telerik object. I have removed the telerik compresion but my application is using a dinamic layer to create the control in the page, Also i will be removing the telerik compresion for all the clases in the control layer. Please can you provide more information regarding the below error, see the details:
Impossible d'effectuer un cast d'un objet de type 'Telerik.Web.UI.CompressedPageState' en type 'System.Collections.IDictionary'.
Informations sur l'erreur: Type: InvalidCastException Message: Impossible d'effectuer un cast d'un objet de type 'Telerik.Web.UI.CompressedPageState' en type 'System.Collections.IDictionary'. Trace de la pile: à System.Web.UI.Page.RegisterRequiresControlState(Control control) à Telerik.Web.UI.RadComboBox.OnInit(EventArgs e) à System.Web.UI.Control.InitRecursive(Control namingContainer) à System.Web.UI.Control.AddedControl(Control control, Int32 index) à System.Web.UI.ControlCollection.Add(Control child) à Telerik.Web.UI.GridPagerButtonBuilder.CreatePageSizeDropDown(Panel container) à Telerik.Web.UI.GridPagerButtonBuilder.CreatePageSize(Panel container) à Telerik.Web.UI.GridPagerItem.InitializePagerItem(GridColumn[] columns) à Telerik.Web.UI.GridPagerItem.SetupItem(Boolean dataBind, Object dataItem, GridColumn[] columns, ControlCollection rows) à Telerik.Web.UI.GridTableView.CreateTopPagerItem(Boolean useDataSource, GridColumn[] copiedColumnSet, Boolean isPagingEnabled, GridTHead thead) à Telerik.Web.UI.GridTableView.CreateControlHierarchy(Boolean useDataSource) à Telerik.Web.UI.GridTableView.CreateChildControls(IEnumerable dataSource, Boolean useDataSource) à System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) à System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) à System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) à System.Web.UI.WebControls.DataBoundControl.PerformSelect() à Telerik.Web.UI.GridTableView.PerformSelect() à System.Web.UI.WebControls.BaseDataBoundControl.DataBind() à Telerik.Web.UI.GridTableView.DataBind() à Telerik.Web.UI.RadGrid.DataBind() à Telerik.Web.UI.RadGrid.AutoDataBind(GridRebindReason rebindReason) à Telerik.Web.UI.RadGrid.OnLoad(EventArgs e) à Env.MYAPPLICATION.Web.Controles.FormulaireGrilleGenerique`1.OnLoad(EventArgs e) dans e:MYAPPLICATION\Env.MYAPPLICATION.Web.Controles\FormulaireGrilleGenerique.cs:ligne 90 à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Control.LoadRecursive() à System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) 
Line 90: MYAPPLICATION\Env.MYAPPLICATION.Web.Controles\FormulaireGrilleGenerique.cs:ligne 90:
protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);      

        }

Hello,

After I updated to 2015 q1 I get following error

Upgrade problem - Unable to cast object of type 'Telerik.Web.UI.ElasticButton' to type 'System.Web.UI.WebControls.LinkButton'

This happens in ItemCreated. I was using following code to hide insertitem when I used insertbutton to open a Radwindow.

protected void ClassesOverviewGrid_ItemCreated(object sender, Telerik.Web.UI.GridItemEventArgs e)
    {
        if (e.Item is GridEditableItem && e.Item.IsInEditMode)
        {
            if (e.Item.OwnerTableView.IsItemInserted)
            {
                GridEditableItem item = e.Item as GridEditableItem;

                LinkButton updateButton = (LinkButton)item.FindControl("PerformInsertButton");

                ((GridTableRow)updateButton.Parent.Parent).Style.Value += "display:none";

            }
        }

}

If I change to 

LinkButton updateButton = (LinkButton)item.FindControl("PerformInsertButton");

((GridTableRow)updateButton.Parent.Parent).Style.Value += "display:none";

then I get the error in second line:

Additional information: Unable to cast object of type 'EditFormTableCell' to type 'Telerik.Web.UI.GridTableRow'.

Do you know how I can fix this?

Whenever I do resize for radeditor. It fails to render correctly.

Please see this attached screenshot.

Why, when I use Material as the base for a theme - do I only have 2 options?  Nothing under primitives - so I can't (for example) give RadMenu a background of other than white.

Am I doing something wrong?

Hi, I have a simple ASPX page with a RadComboBox.  I have noticed that the "ClientState" form data doesn't get added to the request when the form submits unless I have opened the combobox and made a selection.  Is there any way to get ClientState to populate without making the user select one of the list items--say a default option?

Dear Telerik Team,

We would like to use rad notification session timeout feature in my code but we have different project scenario.

We have master page in project but Form tag is inside content page so we are not able to add notification control in master page.

We don't want to add rad notification on each page.

We have created a dynamic control on page load but getting error on continue session button.

Master Page ASPX

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="SampleApplicationSession.Site1" %>

<!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 runat="server">
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
     <div class="clockSession">
            <div class="contSession">
                <div class="sesseionExpire">
                    Your Session will expire in minutes</div>
                <div class="showNotification">
                    Notification will be shown in:</div>
                <div class="timeRemain">
                    <span class="timeSeconds"><span id="mainLbl">60 </span></span>seconds</div>
            </div>
        </div>
    <div>
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        
        </asp:ContentPlaceHolder>
    </div>
</body>
</html>

Master page CS

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace SampleApplicationSession
{
    public partial class Site1 : System.Web.UI.MasterPage
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
    }
}

WebForm1.CS

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace SampleApplicationSession
{
    public partial class WebForm1 :BasePage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Session["Userid"] = "Test";

        }
    }
}

WebForm ASPX

<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="SampleApplicationSession.WebForm1" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>




<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">


   

</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
 
<form id="GlmasterViewForm" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
    <Scripts>
        <asp:ScriptReference Assembly="Telerik.Web.UI" 
            Name="Telerik.Web.UI.Common.Core.js">
        </asp:ScriptReference>
        <asp:ScriptReference Assembly="Telerik.Web.UI" 
            Name="Telerik.Web.UI.Common.jQuery.js">
        </asp:ScriptReference>
        <asp:ScriptReference Assembly="Telerik.Web.UI" 
            Name="Telerik.Web.UI.Common.jQueryInclude.js">
        </asp:ScriptReference>
    </Scripts>
</telerik:RadScriptManager>
</form>

</asp:Content>

BaseFile

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Telerik.Web.UI;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;


namespace SampleApplicationSession
{
    public class BasePage : System.Web.UI.Page
    {

        RadNotification SessionTimeOutNotification = new RadNotification();

        protected void OnCallbackUpdate(object sender, RadNotificationEventArgs e)
        {

        }
        protected override void OnLoad(EventArgs e)
        {
            try
            {

                if (!Page.IsPostBack)
                {
      



                    SessionTimeOutNotification.ContentContainer.CssClass = "";
                    SessionTimeOutNotification.ID = "TestRad";
                    SessionTimeOutNotification.RenderMode = RenderMode.Lightweight;
                    //SessionTimeOutNotification.Position = NotificationPosition.TopCenter;
                    //rad.Width = 190;
                    SessionTimeOutNotification.Title = "Continue Your Session";
                    SessionTimeOutNotification.EnableRoundedCorners = true;
                    SessionTimeOutNotification.ShowCloseButton = false;
                    SessionTimeOutNotification.KeepOnMouseOver = false;
                    SessionTimeOutNotification.LoadContentOn = NotificationLoad.PageLoad;
                    //SessionTimeOutNotification.AutoCloseDelay = 6000;
                    
                   
                    //configure the notification to automatically show 1 min before session expiration
                    SessionTimeOutNotification.ShowInterval = (Session.Timeout - (Session.Timeout - 1)) * 60 * 1000;
                    SessionTimeOutNotification.AutoCloseDelay = 60000;

                    //set the redirect url as a value for an easier and faster extraction in on the client
                    SessionTimeOutNotification.Value = Page.ResolveClientUrl("SessionExpired.aspx");
                    MyTemplate1 objTemplate = new MyTemplate1();
                    SessionTimeOutNotification.ContentTemplate = objTemplate;
                    SessionTimeOutNotification.OnClientShowing = "notification_showing";
                    SessionTimeOutNotification.OnClientHidden = "notification_hidden";

                    SessionTimeOutNotification.CallbackUpdate += OnCallbackUpdate;

                    //SessionTimeOutNotification.CallbackUpdate += new EventHandler(OnCallbackUpdate);

                    this.Form.Controls.Add(SessionTimeOutNotification);

                    if (!ClientScript.IsStartupScriptRegistered("key1"))
                    {
                        ClientScript.RegisterStartupScript(GetType(), "key1", @"<script type=""text/javascript"" src=""../Resources/js/SessionExpired.js""></script>");
                    }

                    if (!ClientScript.IsStartupScriptRegistered("SessionControlScript"))
                    {
                        String cstext1 = "<script type=\"text/javascript\">" +
                        "serverIDs({ notificationID: 'ctl00_ContentPlaceHolder1_TestRad' });</" + "script>";
                        
                        ClientScript.RegisterStartupScript(GetType(), "SessionControlScript", cstext1);
                    }


                }
            }
            catch(Exception ex )
            {}


    
        }

        /// <summary>
        /// This is the base class for the web pages.
        /// We need to implement the common functionalities in this 
        /// class going forward.
        /// </summary>
        public class MyTemplate1 : ITemplate
        {
            protected RadButton btnMsg;
            string colnames;
            public MyTemplate1()
            {

            }
            public void InstantiateIn(System.Web.UI.Control container)
            {


                btnMsg = new RadButton();
                btnMsg.ID = "btnMsg";
                btnMsg.Text = "Continue Your Session";
                btnMsg.OnClientClicked = "ContinueSession";
                btnMsg.AutoPostBack = false;

                //boolValue.DataBinding += new EventHandler(boolValue_DataBinding);
                // boolValue.Enabled = false;
                HtmlGenericControl DivinfoIcon = new HtmlGenericControl("DIV");
                DivinfoIcon.Attributes.Add("class", "infoIcon");
                HtmlGenericControl DivinotificationContent = new HtmlGenericControl("DIV");
                DivinotificationContent.Attributes.Add("class", "notificationContent");
                HtmlGenericControl Div1 = new HtmlGenericControl("DIV");
                Label lblText = new Label();
                lblText.Text = "Time remaining: ";
                lblText.ID = "lblTime";
                HtmlGenericControl tiemlbl = new HtmlGenericControl("SPAN");
                tiemlbl.ID = "timeLbl";
                tiemlbl.InnerHtml = "60";
                tiemlbl.Attributes.Add("class", "timeLbl");
                Div1.Controls.AddAt(0, lblText);
                Div1.Controls.AddAt(1, tiemlbl);
                DivinotificationContent.Controls.AddAt(0, Div1);
                DivinotificationContent.Controls.AddAt(1, btnMsg);
                DivinfoIcon.Controls.Add(DivinotificationContent);
                container.Controls.Add(DivinfoIcon);
            }
        }

    }
}

i am getting attached error on this. Is there any better way to implement it ?

Is there a way to specify a property from the combo box setup with check items to be passed to a control parameter property?

<asp:ControlParameter ControlID="cmbProviderSort" DbType="Int32" ConvertEmptyStringToNull="true" DefaultValue="-1" PropertyName="SelectedValue" Name="a" />

PropertyName is set as SelectedValue which will only work with a non checkbox combo box. What is the best approach to be able to send in all checked items into the asp:ControlParameter.

I have to use the DataSource setup in this way and cannot do it in the code behind. Thanks