RadComboBox IE 7 freeze problem

[Dmitry]

I have a problem with RadComboBox in IE 7.
When I use 

EnableScreenBoundaryDetection="true" (it is by default)

my IE 7 sometimes frozen and not respond  (in case when ComboBox seems like DropUp ComboBox with scroll because many Items).
Can you help me?

Thanks,
Dmitry

[Yana]

Hi Dmitry,

I tested RadComboBox with many items and EnableScreenBoundaryDetection set to true and wasn't able to reproduce the described issue. Could you please send us a working example illustrating the problem so we could observe it? You should open a support ticket to be able to send us files. Thanks

Best wishes,
Yana
the Telerik team

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[Jako Eicker]

I'm experiencing the same problem Dennis got in IE 7

I have a query page with a few filter controls on it. When I added a single RadComboBox to the page (without scrolling, because there aren't enough items in the control after data population), the page works fine when binded to a SqlDataSource.

However, I then added another SqlDataSource, calling the same SP but with different default parameter values. I then dragged another RadComboBox onto the page, and set this control's Datasource to the new SqlDataSource. (When populated, the new RadComboBox had a scrollbar since there were a lot of items to display).

I rebuilt the project, and refreshed the browser (and I do get the latest page on every page visit). The page loaded up fine, and both RadComboBoxes populated with data. However, I did experience the following:

So the page is now rendered, and all controls have been filled with data. When expanding the second dropdown, the items would display. If you try to expand it again by clicking on it, the browser freezes and becomes non responsive indefinitely (so it freezes until you go and kill IE in task manager).

I'm using Telerik 2008 Q2 ASPNet AJAX and IE 7.

Here's my aspx page code: (I only replaced some sensitive information in the connectionstring and sql parameter values in the sqlDataSource. You would also notice we make use of our own controls, but these are not bringing back data right now because I changed the page to inherit from the normal System.Web.UI.Page base class. Also, please note that I do not manipulate data in any way in this combobox in CS, we simply read the value from the currently selected item)

<%

@ Page Language="c#" AutoEventWireup="True" Inherits="MedihelpWorkflow.Medichron.MediChronQuery" CodeBehind="MediChronQuery.aspx.cs" %>

 

<!

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>

 

 

<title>Title</title>

 

</

head>

 

<

body>

 

 

<form id="frmMediChronQuery" method="post" runat="server">

 

 

 

<telerik:RadScriptManager ID="ScriptManager1" runat="server" EnableTheming="True"/>

 

 

 

<div id="signon">

 

 

<table cellspacing="0">

 

 

<tr>

 

 

<td valign="middle" align="left" colspan="4">

 

 

<dcx_sou:SignOnUser ID="ctrlUserSignOnInfo" runat="server" ColWidth1="141px" ColWidth2="177px" TableWidth="634px" DBSetting="MediConnection"></dcx_sou:SignOnUser>

 

 

</td>

 

 

</tr>

 

 

</table>

 

 

</div>

 

 

 

<div id="maincontent">

 

 

<table cellspacing="0">

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

Member No :

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:TextBox ID="txtMemberNo" runat="server" MaxLength="7"></asp:TextBox>

 

 

</td>

 

 

<td class="maincontenttdlight">

 

Reference No :

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:TextBox ID="txtRefNumber" runat="server" Width="152px" MaxLength="12"></asp:TextBox>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

Dependant No :

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:TextBox ID="txtDependantNo" runat="server" Width="48px" MaxLength="2"></asp:TextBox>

 

 

</td>

 

 

<td class="maincontenttdlight">

 

Practice No :

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:TextBox ID="txtPracticeNo" runat="server" MaxLength="7"></asp:TextBox>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

Ticket No :

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

<asp:TextBox ID="txtTicketNo" runat="server" Width="155px" MaxLength="20" Height="20px"></asp:TextBox>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

Enquiry Type :

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

<telerik:RadComboBox ID="cboEnquiryType" Runat="server"

 

 

DataSourceID="sdsGetEnquiryTypes" Skin="WebBlue"

 

 

DataTextField="Description" DataValueField="EntityTypeID"

 

 

AppendDataBoundItems="true" >

 

 

<Items>

 

 

<telerik:RadComboBoxItem runat="server" Selected="True"

 

 

Text="Please select an option" Value="0" Width="161px" />

 

 

</Items>

 

 

<CollapseAnimation Type="OutQuint" Duration="200">

 

 

</CollapseAnimation>

 

 

</telerik:RadComboBox>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

From Script Date

&nbsp;:

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

&nbsp;<telerik:RadDatePicker ID="RADScriptFirstDay" runat="server" Skin="Office2007">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="Office2007" LabelCssClass="radLabelCss_Office2007">

 

 

</DateInput>

 

 

<Calendar ID="Calendar5" Skin="Office2007" runat="server">

 

 

</Calendar>

 

 

<DatePopupButton CssClass="radPopupImage_WebBlue"></DatePopupButton>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

To Script Date

&nbsp;:

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

<telerik:RadDatePicker ID="RADScriptLastDay" runat="server">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="WebBlue">

 

 

</DateInput>

 

 

<Calendar ID="Calendar6" Skin="WebBlue" runat="server">

 

 

</Calendar>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

From Date Received

&nbsp;:

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

&nbsp;<telerik:RadDatePicker ID="RADReceivedFirstDay" runat="server">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="WebBlue">

 

 

</DateInput>

 

 

<Calendar ID="Calendar1" Skin="WebBlue" runat="server">

 

 

</Calendar>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

To Date Received

&nbsp;:

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

&nbsp;<telerik:RadDatePicker ID="RADReceivedLastDay" runat="server">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="WebBlue">

 

 

</DateInput>

 

 

<Calendar ID="Calendar2" Skin="WebBlue" runat="server">

 

 

</Calendar>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

 

&nbsp;Document&nbsp;Type :

 

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<telerik:RadComboBox ID="cboDocType" Runat="server"

 

 

DataSourceID="sdsGetDocumentTypes" Skin="WebBlue"

 

 

DataTextField="Description" DataValueField="EntityTypeID"

 

 

AppendDataBoundItems="true" >

 

 

<Items>

 

 

<telerik:RadComboBoxItem runat="server" Selected="True"

 

 

Text="Please select an option" Value="0" Width="161px" />

 

 

</Items>

 

 

<CollapseAnimation Type="OutQuint" Duration="200">

 

 

</CollapseAnimation>

 

 

</telerik:RadComboBox>

 

 

</td>

 

 

<td class="maincontenttdlight">

 

Current Activity:

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<dcx:DCXDropDownList ID="cboStatus" TabIndex="3" runat="server" Width="160px" XmlTag="EnquiryTypeID"

 

 

EntityID="21">

 

 

<asp:ListItem Value="0">Please Select An Option</asp:ListItem>

 

 

</dcx:DCXDropDownList>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight" style="height: 31px">

 

From Last Action Changed

&nbsp;Date&nbsp;:

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem" style="height: 31px">

 

 

&nbsp;<telerik:RadDatePicker ID="RADStatusFirstDay" runat="server">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="WebBlue">

 

 

</DateInput>

 

 

<Calendar ID="Calendar3" Skin="WebBlue" runat="server">

 

 

</Calendar>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

 

<p>

 

To

&nbsp;Last&nbsp;Action&nbsp; Changed&nbsp;Date&nbsp;:</p>

 

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

&nbsp;<telerik:RadDatePicker ID="RADStatusLastDay" runat="server"

 

 

Skin="Office2007">

 

 

<DateInput DateFormat="dd MMM yyyy" Skin="Office2007"

 

 

LabelCssClass="radLabelCss_Office2007">

 

 

</DateInput>

 

 

<Calendar ID="Calendar4" Skin="Office2007" runat="server">

 

 

</Calendar>

 

 

<DatePopupButton CssClass="radPopupImage_WebBlue"></DatePopupButton>

 

 

</telerik:RadDatePicker>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

Current UserID :

 

</td>

 

 

<td colspan="3" class="maincontenttditem">

 

 

<asp:TextBox ID="txtUserID" runat="server" Width="116px" MaxLength="15"></asp:TextBox>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td class="maincontenttdlight">

 

BarCode

&nbsp;:&nbsp;

 

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:TextBox ID="txtBarCode" runat="server"></asp:TextBox>

 

 

</td>

 

 

<td class="maincontenttdlight">

 

Import Type

&nbsp;:&nbsp;

 

 

</td>

 

 

<td class="maincontenttdmulti">

 

 

<asp:DropDownList ID="cboImportType" runat="server" Width="200px">

 

 

<asp:ListItem Value="0" Selected="True">Please Select An Option</asp:ListItem>

 

 

<asp:ListItem Value="F">FAX</asp:ListItem>

 

 

<asp:ListItem Value="S">Scan</asp:ListItem>

 

 

<asp:ListItem Value="M">Manual Upload</asp:ListItem>

 

 

<asp:ListItem Value="E">E-Mail</asp:ListItem>

 

 

</asp:DropDownList>

 

 

</td>

 

 

</tr>

 

 

</table>

 

 

</div>

 

 

 

<div id="buttonbar">

 

 

<table cellspacing="0">

 

 

<tr>

 

 

<td>

 

 

<asp:ImageButton ID="btnSubmit" runat="server" ImageUrl="../Images/btnSubmit.gif" OnClick="btnSubmit_Click" />

 

 

<asp:HyperLink ID="HyperLink1" runat="server" ImageUrl="../Images/btnCancel.gif" NavigateUrl="../K2/FilterSummaryWorklist.aspx?ProcFilterEntityID=57&ShowActivity=Y&Heading=MEDICHRON">HyperLink</asp:HyperLink>&nbsp;

 

 

</td>

 

 

</tr>

 

 

</table>

 

 

</div>

 

 

 

<table cellspacing="0">

 

 

<tr>

 

 

<td>

 

 

<asp:Label ID="lblErrorMessage" runat="server" Font-Bold="True" ForeColor="Red" Font-Size="X-Small"></asp:Label>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td>

 

 

<asp:Label ID="lblPageError" runat="server"></asp:Label>

 

 

</td>

 

 

</tr>

 

 

</table>

 

 

 

<asp:SqlDataSource ID="sdsGetEnquiryTypes" runat="server"

 

 

ConnectionString="<%$ Connection string here %>"

 

 

SelectCommand="dcsp_getEntityType_BP" SelectCommandType="StoredProcedure">

 

 

<SelectParameters>

 

 

<asp:Parameter DefaultValue="0" Name="EntityID" Type="Int32" />

 

 

<asp:Parameter DefaultValue="Default value here" Name="EntityDescription"

 

 

Type="String" />

 

 

</SelectParameters>

 

 

</asp:SqlDataSource>

 

 

 

<asp:SqlDataSource ID="sdsGetDocumentTypes" runat="server"

 

 

ConnectionString="<%$ Connection string here %>"

 

 

SelectCommand="dcsp_getEntityType_BP" SelectCommandType="StoredProcedure">

 

 

<SelectParameters>

 

 

<asp:Parameter DefaultValue="0" Name="EntityID" Type="Int32" />

 

 

<asp:Parameter DefaultValue="Defaut value here" Name="EntityDescription"

 

 

Type="String" />

 

 

</SelectParameters>

 

 

</asp:SqlDataSource>

 

 

 

</form>

 

</

body>

 

</

html>

 

[Veselin Vasilev]

Hi Jako Eicker,

Just for the testing purposes - have you tried using the latest version of RadComboBox?

I could not manage to reproduce the problem on my side.

I believe the best way to proceed is to send us a sample running project which demonstrates the problem. Then we will be able to find the reason and a solution.

Thanks

Best wishes,
Veselin Vasilev
the Telerik team

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Check out the tips for optimizing your support resource searches.

[Jako Eicker]

Hi Veselin

 

I have already found a work-around to this problem, all that I needed to do was to set the height property of the RadComboBox.

 

What I gathered from other posts from people experiencing the similar problem, it has to do with a JavaScript function that determines the height property of the combobox (if you haven't specified it's height). The JavaScript function would enter an infinite loop and, in effect, freeze the browser.

 

This would be consistent with my findings that this only happens in IE7, and not IE8 or Firefox 3. (Because each one of these has their own JS processing engine).

What is peculiar to me is that I've not changed my IE version for quite some time, and this is the first time I've experienced this problem with a RadComboBox.

I have not tested with the 2008 Q3 controls yet, since this is not an option at the current time. Even if it did work, it would mean that we would have to upgrade our entire solution to the latest controls (which of course has financial implications, and first needs to be approved)

Thanks
Jako

[Veselin Vasilev]

Hi Jako Eicker,

I am glad to hear that you have found a solution and it is working ok now.

Let us know if  we can be of any help.

Best wishes,
Veselin Vasilev
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.

[digitall]

As an FYI, I experienced the same issue with version 2010.2.826.35. The combo box was inside a radwindow and was freezing in IE7 only whenever I tried expanding it. Setting the height resolved the issue but it's certainly interesting that this issue still exists.

[Simon]

Hi digitall,

Indeed the issue has been 'revived' at some point in the recent versions of Telerik.Web.UI. We will certainly revisit it during the next few weeks. You can track the status of the issue or vote for it here in the meanwhile.

Kind regards,
Simon
the Telerik team

[ali]

hello

i have a web page that contains many radcomboboxes ,i have a selected index change event on one of the radcomboboxes,

when the selected change event fires some other radcomboboxes freezes and sometimes dont freeze.

this happens only on safari mac,had any one experienced this issue?

[Dimitar]

Hello,

As the issue reported by you seems unrelated to the scenario and browser specifics discussed in this very old forum thread, I would suggest you to open a new support ticket or a forum thread for the current issue. It would be helpful if you provide further details for reproducing the issue, e.g. a simple runnable sample, browser version used for reproduction and controls version used.

Regards,
Dimitar
Telerik by Progress

[ali]

hello,

its on safari mac version 9 (latest version).

[ali]

hello Dmitry,

there are also javascript errors in Telerik.Web.UI.WebResource.axd like (TypeError :null is not an object (evaluating 'b.constructor'))

[ali]

hello Dmitry,
there are also javascript errors in Telerik.Web.UI.WebResource.axd like (TypeError :null is not an object (evaluating 'b.constructor'))

[Dimitar]

Hello,

As previously said, the issue reported by you is unrelated to the scenario and browser specifics discussed in this forum thread.So in order to keep threads as short and concise as possible, I would suggest you to open a new support ticket or a forum thread for the current issue.

I am afraid that the provided information is insufficient to reproduce the issue on our side. It is essential that you you provide further details for reproducing the issue and controls version used. Is the issue reproducible on the RadComboBox online demos?

If a demo could not be used for reproduction, in order to assist you in the most efficient way I would suggest that you provide us with a very simplified runnable project that demonstrates the behavior that you describe. It may include aspx, code behind, web.config, data source if any, as well as any other files you find necessary. Thus, we could test your exact scenario locally and determine what might be causing the issue that you are experiencing. You can find guidelines how to prepare such a sample in the Isolating a problem in a sample project blog post.

Thank you in advance for your cooperation.

Regards,
Dimitar
Telerik by Progress