Hello guys,

I have copied and pasted the example provided by the Telerik website almost verbatim - with exception to the implemented DataSource (which I'm doing programmatically for the sake of the example), and am getting problems. The website is here: Virtual Scrolling and Paging.

The problems are as follows:

• When I scroll to the bottom of the list, the AJAX request runs properly (seen during debugging), but the grid does not update with more records. Also, all other attempts to scroll cause the loading animation to appear and simply hang on the screen so that the page must be reloaded
• After clicking on either of the heading columns to sort, it's successful the 1st time, but afterwards it hangs, nothing is clickable, and the page must be reloaded

Please see the attached image 'ScrollingHangingIllustration.png'. Also, see below for the code. Please help!!

ASP.NET Markup:

VB Code-Behind:

Hi, sorry my english isn't very good, hope you understand.

I have a treeview with a contextMenu. In the contextMenu I have an item that needs some javascript to run and a confirmation to know if postback must be triggered.

Something like this :

- user right-click on a node (contextMenu appears)

- user select menu item

- javascript stop postback (I used "args.set_cancel(true);" in the javascript)

- javascript runs some functions then a "modal window" is displayed (this is not a window.confirm !!!) with a message like "Are you sure ?" and the usual buttons "yes/no"

My problem, how do I re-enable (or resume, or resend) the "postback" like if the menu item was clicked ?

I've already done something like this on a RadButton, and simply by using "sender.click()" in the javascript, the postback is "resumed". But there are no functions like this on a contextMenu I think...

I have one grid with an ImageButton in an ItemTemplate that download a file and delete a row in the db inside the ItemCommand function. I am using a datasource on the page.  All Insert/Update/Delete events are being bound on the server side also.

I am calling the Rebind() method after the data operations, but the grid itself does not show the updated results unless I refresh the page completely.

I've tried disabling the grid viewstate, but it's not working. What do I need to do to get the grid to refresh?

Some code:

<telerik:radgrid runat="server" id="grdId"
                allowpaging="True" allowsorting="true" autogeneratecolumns="False" pagesize="10"
                cssclass="RadGrid_ModernBrowsers" OnItemCommand="grdId_OnItemCommand"
                localizationpath="~/App_GlobalResources" DataSourceID="objDataSource"
                enableembeddedskins="true" skin="Telerik" culture="it-IT" allowfilteringbycolumn="true" ViewStateMode="Disabled">
                <SelectedItemStyle BorderColor="Yellow"></SelectedItemStyle>

                    <MasterTableView CommandItemDisplay="Top" DataKeyNames="id"
                        ClientDataKeyNames="id" ShowGroupFooter="true"
                        TableLayout="Fixed" 
                        ShowFooter="True" PageSize="10">
                        <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
                        <Columns>
                            (...)
                            <telerik:GridTemplateColumn AllowFiltering="false">
                                <HeaderStyle Width="80px" />
                                <HeaderTemplate>
                                    CV
                                </HeaderTemplate>
                                <ItemTemplate>
                                    <asp:ImageButton ID="btnDownload" Width="40px" runat="server" ImageUrl="img/docx.png" CommandName="Download"
                                        AlternateText="Download" ToolTip="Download" CommandArgument='<%# Eval("id")%>' />
                                </ItemTemplate>
                                <ItemStyle HorizontalAlign="Center" />
                            </telerik:GridTemplateColumn>                     
                        </Columns>
                        <CommandItemSettings ShowExportToPdfButton="false"
                            ShowAddNewRecordButton="false" ShowRefreshButton="false" RefreshText="" />
                    </MasterTableView>
                    <ClientSettings>
                        <Selecting AllowRowSelect="True" />
                    </ClientSettings>
                    <GroupingSettings CaseSensitive="false" />
                </telerik:radgrid>

<asp:ObjectDataSource ID="objDataSource" runat="server"
        TypeName="TypeName"
        SelectMethod="Select_Table">
    </asp:ObjectDataSource>

Protected Sub Page_PreRender(sender As Object, e As System.EventArgs) Handles Me.PreRender
        Try
            If Not IsPostBack Then
                grdId.DataBind()
            End If
        Catch ex As Exception
        End Try
    End Sub

Protected Sub grdId_OnItemCommand(sender As Object, e As GridCommandEventArgs)
        Try
            If e.CommandName = "Download" Then
                Dim Id As Integer = Convert.ToInt32(e.CommandArgument)
                Dim scarica As Byte() = CQuery.Select_Download(Id)
                Response.Clear()
                Response.AddHeader("Content-Disposition", "attachment; filename=" + "nomefile")
                Response.ContentType = "application/msword"
                Response.BinaryWrite(scarica)
                CQuery.Update_Table(Id)   'This delete the record
                grdId.Rebind()
                Response.End()
                Response.Flush()
            End If
        Catch ex As Exception

        End Try
    End Sub

Is it possible to do paging by number of datagroups?  Display say 5 datagroups per page, instead of items.

Thanks.

Hello,

I have utilized the virtual scrolling example provided by the Telerik website verbatim - with exception to the implemented DataSource (which I'm doing programmatically for the sake of the example), and am getting issues. The website is here: Virtual Scrolling and Paging.

The problems are as follows:

• When I scroll to the bottom of the list, the AJAX request runs properly (seen during debugging), but the grid does not update with more records. Also, all other attempts to scroll cause the loading animation to appear and simply hang on the screen so that the page must be reloaded
• After clicking on either of the heading columns to sort, it's successful the 1st time, but afterwards it hangs, nothing is clickable, and the page must be reloaded

Please see the attached image 'ScrollingHangingIllustration.png'. Also, see below for the code. Please help!!

Client-Side RadCodeBlock

Client-Side AJAX Manager

Client-Side RadGrid

Server-Side AjaxRequest

Server-Side Datasource

Thanks!

Hi Telerik

I wana to set DelayFilter for  FilterTemplate  in RadGrid but when i set that , it's not work !

why this not work and how to set it ?

please help me .

Thanks

I've looked at a number of posts here on doing this and just can't seem to get it to work. But I have inside of a GridTemplateColumn and based on the value of one of the data columns I want to set it to disabled. My data values are either "OPEN" or "CLOSED". The checkbox in question is cbMarkCompleted and the datavalue I'm checking is TaskStatusTypeCode So here is my current code: