RadTreeView + IIS 6 + IE 9 Issue

[Scott Morrison]

When viewing the RadTreeView via IE 9 when served from IIS 6, the tri-state checkboxes are not visible. Other browsers do not have this issue. When viewing the RadTreeView via IE 9 when served from IIS 7, everything works as expected. I am using v.2011.2.712.40. Any ideas? 

Here is the web config:

<?xml version="1.0"?>
<configuration>
    <appSettings>
    <add key="Telerik.Skin" value="Windows7" />
    <add key="Telerik.ScriptManager.TelerikCdn" value="Disabled" />
    <add key="Telerik.StyleSheetManager.TelerikCdn" value="Disabled" />
    </appSettings>
    <system.web>
    <customErrors mode="Off"></customErrors>
        <authentication mode="Windows" />
        <authorization>
            <allow roles="Resident Portal Users" />
        </authorization>
        <compilation debug="true" targetFramework="4.0">
            <assemblies>
                <add assembly="System.Web.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
                <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /></assemblies></compilation>
        <pages>
            <controls>
                <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI" />
            </controls>
        </pages>
        <httpHandlers>
            <add path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" validate="false" />
            <add path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" validate="false" />
            <add path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" verb="*" validate="false" />
            <add path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" validate="false" />
            <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" />
        </httpHandlers>
        <httpModules>
        </httpModules>
    </system.web>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false" />
        <modules runAllManagedModulesForAllRequests="true">
        </modules>
        <handlers>
            <remove name="ChartImage_axd" />
            <add name="ChartImage_axd" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" preCondition="integratedMode" />
            <remove name="Telerik_Web_UI_SpellCheckHandler_axd" />
            <add name="Telerik_Web_UI_SpellCheckHandler_axd" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" preCondition="integratedMode" />
            <remove name="Telerik_Web_UI_DialogHandler_aspx" />
            <add name="Telerik_Web_UI_DialogHandler_aspx" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" verb="*" preCondition="integratedMode" />
            <remove name="Telerik_RadUploadProgressHandler_ashx" />
            <add name="Telerik_RadUploadProgressHandler_ashx" path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" preCondition="integratedMode" />
            <remove name="Telerik_Web_UI_WebResource_axd" />
            <add name="Telerik_Web_UI_WebResource_axd" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" preCondition="integratedMode" />
        </handlers>
    </system.webServer>
    <connectionStrings>
    </connectionStrings>
</configuration>

[Scott Morrison]

The latest version of ie 8 on windows 7 failed to render the checkboxes as well.

Removing the precondition from Telerik_Web_UI_WebResource_axd seems to be the solution. Strange, I thought IIS 6 looked at <system.web><httpHandlers> not <system.webServer><handlers>.

[Nikolay Tsenkov]

Hi Scott,

Here is a nice article that should enable you to move all set through system.web settings to system.webServer and by that to have a single web.config for both IIS 6 and 7: http://arcware.net/use-a-single-web-config-for-iis6-and-iis7/

Regards,
Nikolay Tsenkov
the Telerik team