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RadAsyncupload clears on post back

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AsyncUpload

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9 Answers, 1 is accepted

answered on 18 Jan 2017, 10:41 AM

Hi,

I have similiary the same problem.
In my page i have a grid with manual update and delete comands that go to the server and do their proper things.
The problem is, every time i go to the server and back (without using the radAsyncUpload) the RadAsyncUpload gets hidden/cleared.
I have set the PostBackTriggers to a button in my page that deals with the reading of the files. But it doesn't solve.
At this time i am not looking to preserve the files (cause im not even using the RadAsyncUpload).
I just want to preserve the RadAsyncUpload itself.

Adding another information. After this happend i go to see the source code of the page, and the input of the RadAsyncUpload is type="hidden".

Can anyone help me?

answered on 23 Jan 2017, 08:30 AM

Hello João Pedro,

How is the AsyncUpload related to the Grid in your scenario? Are you using it in an EditItemTemplate as shown below, or in a different way?

<telerik:GridTemplateColumn DataField="Data" HeaderText="Image" UniqueName="Upload">

<EditItemTemplate>

<telerik:RadAsyncUpload RenderMode="Lightweight" runat="server" ID="AsyncUpload1"

AllowedFileExtensions="jpg,jpeg,png,gif">

</telerik:RadAsyncUpload>

</EditItemTemplate>

</telerik:GridTemplateColumn>

Regards,
Ivan Danchev
Telerik by Progress

Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.

answered on 23 Jan 2017, 09:57 AM

Hi Ivan,

No. My AsyncUpload is outside the grid. It is used as a alternative way to fill the grid.
Below is part of my page' code. Hope it can help.

Thanks is advance,
João Pedro

<telerik:RadAjaxManager ID="RadAjaxManager1" DefaultLoadingPanelID="RadAjaxLoadingPanel1" runat="server">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="grdProcessosLiquidados">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="grdProcessosLiquidados" />

<telerik:AjaxUpdatedControl ControlID="RadWindowManager1" />

<telerik:AjaxUpdatedControl ControlID="RadInputManager1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

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

<telerik:RadScriptManager ID="RadScriptManager1" runat="server" AsyncPostBackTimeout="600">

<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>

<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" DecorationZoneID="decorationZone" EnableRoundedCorners="false" />

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1">

<telerik:RadScriptBlock runat="server">

<script type="text/javascript">

function KeyPress(sender, args) {

var c = args.get_keyCode();

if (c == 13) {

__doPostBack('btnKeyPress', '');

}

function rowDblClick(sender, eventArgs) {

sender.get_masterTableView().editItem(eventArgs.get_itemIndexHierarchical());

}

</script>

</telerik:RadScriptBlock>

<div class="fieldset-page">

<%-- someFields --%>

<telerik:RadGrid ID="grdProcessosLiquidados" runat="server" OnDeleteCommand="grdProcessosLiquidados_DeleteCommand" OnItemCreated="grdProcessosLiquidados_ItemCreated" OnUpdateCommand="grdProcessosLiquidados_UpdateCommand" AllowMultiRowSelection="True" OnItemDataBound="grdProcessosLiquidados_ItemDataBound" AutoGenerateColumns="false" Width="1055px" OnNeedDataSource="grdProcessosLiquidados_NeedDataSource" AllowPaging="true" AllowSorting="true" ShowGroupPanel="false" Skin="Office2010Silver">

<ClientSettings AllowKeyboardNavigation="true">

<Selecting AllowRowSelect="True" />

<Scrolling AllowScroll="True" UseStaticHeaders="false" />

<ClientEvents OnRowDblClick="rowDblClick"/>

</ClientSettings>

<HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" Wrap="false"/>

<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Wrap="false"/>

<AlternatingItemStyle HorizontalAlign="Center" VerticalAlign="Middle"/>

<EditItemStyle HorizontalAlign="Center" Wrap="false" VerticalAlign="Middle"/>

<MasterTableView EditMode="InPlace">

<Columns>

<telerik:GridEditCommandColumn ButtonType="FontIconButton" />

<telerik:GridButtonColumn ConfirmTitle="Delete" ButtonType="FontIconButton" CommandName="Delete" />

<telerik:GridBoundColumn DataField="NumeroProcesso" FilterControlAltText="Filter NumeroProcesso column" HeaderText="Nº Processo" SortExpression="NumeroProcesso" UniqueName="NumeroProcesso" >

<ColumnValidationSettings>

<ModelErrorMessage Text="" />

</ColumnValidationSettings>

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Nome" FilterControlAltText="Filter Nome column" HeaderText="Nome Cliente" SortExpression="Nome" UniqueName="Nome">

<ColumnValidationSettings>

<ModelErrorMessage Text="" />

</ColumnValidationSettings>

</telerik:GridBoundColumn>

<%-- someMoreColumns --%>

</Columns>

</MasterTableView>

</telerik:RadGrid>

<div class="fieldset-cell" style="width:300px">

<telerik:RadLabel ID="lblFicheiro" runat="server" AssociatedControlID="brwFicheiro" Text="Ficheiro:" CssClass="shortLabel"></telerik:RadLabel>

<telerik:RadAsyncUpload ID="brwFicheiro" runat="server" MaxFileInputsCount="1" HideFileInput="false" PostbackTriggers="btnImportar">

</telerik:RadAsyncUpload>

</div>

</telerik:RadAjaxPanel>

<telerik:RadInputManager ID="RadInputManager1" Skin="Office2010Silver" runat="server" Enabled="true">

<telerik:NumericTextBoxSetting BehaviorID="NumeroProcessoSetting" Type="Number" DecimalDigits="0" AllowRounding="true"></telerik:NumericTextBoxSetting>

<telerik:TextBoxSetting BehaviorID="NomeSetting"></telerik:TextBoxSetting>

</telerik:RadInputManager>

<telerik:RadWindowManager ID="RadWindowManager1" runat="server"></telerik:RadWindowManager>

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

answered on 26 Jan 2017, 07:53 AM

Hi João Pedro,

Based on the provided information I think there could be two reasons for the AsyncUpload not being visible after a postback:

A javascript error on the page that prevents the AsyncUpload from being properly initialized and rendered. You can check for such errors in the browser dev tools console.
Updating the same controls with AjaxManager and an AjaxPanel at the same time. This a scenario that must be avoided as mentioned in this article, as it could lead to unexpected/unwanted behavior. In your case the Grid (grdProcessosLiquidados) is added to the AjaxManager's settings, but at the same time it (as well as the AsyncUpload) is wrapped in an AjaxPanel:

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1">

Remove the AjaxPanel and check whether this fixes the issue with the AsyncUpload's visibility.

Regards,
Ivan Danchev
Telerik by Progress

Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.