serious issue radform com visibility

[Faheem Nadeem]

hi,

i am opening google maps in a  browser control in radform. for this i need to to set com visibilty to true to communicate with javascript in locally hosted web page.

my code :

using System.Runtime.InteropServices;

using System.Security.Permissions;

    // Make COM Visible to communication with other App

    [ComVisibleAttribute(true)]

    // Set Security Level to Full Trust inorder to enable external Javascript function invokes and data passing

    [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]

works perfect in simple .net forms

but gives error in rad form....

error:

A QueryInterface call was made requesting the default IDispatch interface of COM visible managed class 'TcpMappingServer.LivePlayAVL'. However since this class does not have an explicit default interface and derives from non COM visible class 'Telerik.WinControls.UI.RadForm', the QueryInterface call will fail. This is done to prevent the non COM visible base class from being constrained by the COM versioning rules.

Anysolution Please, ineed it quickly, if radform wont work will the shaped form work...

or any other solution with radform.

thanks in advance!!!

[Deyan]

Hi Faheem,

Thanks for contacting us.

Our assemblies have the default ComVisible attribute value set to false. This has been set as a default value for all .NET assemblies from .NET v2.0 since many issues with GUIDs and overhead interface data might occur when all assemblies are ComVisible by default.

However, we would like to take a look at your project and see what we can do to make it work. Therefore, I would like to ask you to send us a demo application that manages to reproduce the issue. You can do so in a new support ticket.
 
Thanks for your time.
 
Kind regards,
Deyan
the Telerik team

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[Faheem Nadeem]

thankyou for ure reply!!! I am attaching a support ticket soon

But the problem is really simple.

What i am trying to implement is, google maps running in a web browser control in a radform.

the google api functions are written in a locally hosted webpage, which is being navigated by the web browser control on the rad form.

passing of information between javascript and c#.net (as i want to pass some values to functions in javascript located in the navigated html file), requires me to set the com visibilty attribute  to true, so that javascript can be accessesd through c#.

Easy enough as i require only these two statements after my namespace. works flawlessly for my standard windows forms, but as i have already designed my whole forms in radforms, reverting back is a big issue :(. 

Hope you guys will find a olution to it soon!!!

Thanks again!!!

[Faheem Nadeem]

my support ticket Id is

238788

Please help me with a solution to this problem urgently else i have to remove every form in my project to standards forms.

[Deyan]

Hello Faheem Nadeem,

Please refer to the support ticket mentioned above.
 

All the best,
Deyan
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[Sutasinee]

I have same problem. What is solution for this?

[Deyan]

Hello Sutasinee,

The solution of this case is to create a class which is ComVisible and reroute the method calls that come from the Web Browser to the API of this class. In this way you will not have to make RadForm ComVisible and also will not get the exception discussed here. I hope this helps.

All the best,
Deyan
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[Steve]

ignore

[Steve]

pls ignore. i worked it out