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RadComboBox IE 7 freeze problem

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ComboBox

This is a migrated thread and some comments may be shown as answers.

13 Answers, 1 is accepted

answered on 27 Feb 2009, 03:38 PM

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>

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

<tr>

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

</td>

</tr>

</table>

</div>

<tr>

Member No :

</td>

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

</td>

Reference No :

</td>

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

</td>

</tr>

<tr>

Dependant No :

</td>

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

</td>

Practice No :

</td>

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

</td>

</tr>

<tr>

Ticket No :

</td>

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

</td>

</tr>

<tr>

Enquiry Type :

</td>

<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>

</telerik:RadComboBox>

</td>

</tr>

<tr>

From Script Date

</td>

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

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

To Script Date

</td>

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

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

From Date Received

</td>

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

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

To Date Received

</td>

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

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

 Document Type :

</td>

<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>

</telerik:RadComboBox>

</td>

Current Activity:

</td>

<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>

From Last Action Changed

 Date :

</td>

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

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

<p>

 Last Action  Changed Date :</p>

</td>

 <telerik:RadDatePicker ID="RADStatusLastDay" runat="server"

Skin="Office2007">

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

LabelCssClass="radLabelCss_Office2007">

</DateInput>

</Calendar>

</telerik:RadDatePicker>

</td>

</tr>

<tr>

Current UserID :

</td>

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

</td>

</tr>

<tr>

BarCode

</td>

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

</td>

Import Type

</td>

<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>

<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> 

</td>

</tr>

</table>

</div>

<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">

<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">

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

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

Type="String" />

</SelectParameters>

</asp:SqlDataSource>

</form>

body>

html>

Accepted

answered on 02 Mar 2009, 02:26 PM

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

answered on 17 Aug 2016, 08:23 AM

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
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