How to access scanner in web browser

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I have used vs2010 and silverlight 5 to access scanner in web browser. When i host the application on iis7, i can able to access scanner in Mozilla but does not in internet explorer. why the IE browser does not support to access scanner in web browser?

I made changes in,
Server side
• Sign the xap using certificate.
Client side
• Install the cert into “trusted publishers”
• Change the reg key “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Silverlight \AllowElevatedTrustAppsInBrowser” to 1

My code is,

C#

try
{
    using (dynamic CommonDialog = AutomationFactory.CreateObject("WIA.CommonDialog"))
    {
        dynamic imageFile = CommonDialog.ShowAcquireImage();
        if (imageFile != null)
        {
            if (!Directory.Exists("D:\\ScanImage"))
            {
                Directory.CreateDirectory("D:\\ScanImage");
            }
            string filePath = string.Format("D:\\ScanImage\\{0}.jpg", Guid.NewGuid());
            imageFile.SaveFile(filePath);
        }
    }
}
catch (System.Runtime.InteropServices.COMException ex)
{
    if (ex.ErrorCode == -2145320939)
    {
        MessageBox.Show("Could not find an attached scanner.", "Scanner Error", MessageBoxButton.OK);
    }
    else
    {
        MessageBox.Show(ex.Message, "Scanner Error", MessageBoxButton.OK);
    }
}

Thanks in advance

Posted 17-Apr-13 23:42pm

Sugu.s

Updated 18-Apr-13 0:29am

v4

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Neha G. Nagpurkar 20-Jun-13 7:35am

Can I get demo application for this? I have been searching for last 2 weeks. Thanks in advance.

2 solutions

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E.F. Nijboer · Answer 1 · 2013-04-18T00:58:00

Solution 1

Maybe the examples here can help you out:
http://blog.yezhucn.com/wiaaut/showacquireimage.htm[^]

Good luck!

Posted 18-Apr-13 0:58am

E.F. Nijboer

Comments

Sugu.s 18-Apr-13 7:05am

Hi Nijboer,

I was tried all these parameters in ShowAcquireImage Method. But not working.

E.F. Nijboer 18-Apr-13 7:16am

Maybe this info helps, there seems to be another reg key:
http://msdn.microsoft.com/en-us/library/gg192793%28v=vs.95%29.aspx

Sugu.s 18-Apr-13 7:40am

If i open browser with Run as Administrator (with Administrator permissions), able to access scanner. do you have any idea without admin permission to access.

E.F. Nijboer 18-Apr-13 8:21am

Seems you need to give non-admin users the correct permission. There is some info on that on the above link, like info on Group Policy Settings. I don't know exactly whats wrong. It is also strange that Firefox does work, or are you always running that as administrator?
Also have a look here:
http://msdn.microsoft.com/en-us/library/ee721083%28v=vs.95%29.aspx

Sugu.s 22-Apr-13 7:15am

I was tried all group policy settings and all above given link details, nothing to work. Any idea tell me ASAP

E.F. Nijboer 22-Apr-13 7:27am

I really wouldn't have any idea because there is to little info on what the problem might be. Have you checked the event log?

Sugu.s 24-Apr-13 4:26am

I got error when access scanner

Message: Unhandled Error in Silverlight Application Failed to create an object instance for the specified ProgID.
at MS.Internal.Error.MarshalXresultAsException(UInt32 hr, COMExceptionBehavior comExceptionBehavior)

at MS.Internal.XcpImports.CheckHResult(UInt32 hr)

at MS.Internal.ComAutomation.ComAutomationNative.CreateObject(String progID, IntPtr& nativeObject)

at MS.Internal.ComAutomation.ComAutomationServices.CreateObject(String progID, ComAutomationParamWrapService paramWrapService)

at System.Runtime.InteropServices.Automation.AutomationFactory.CreateObject(String progID)

at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)

E.F. Nijboer 24-Apr-13 4:54am

Have you tried google on the first line? ;-)

http://10rem.net/blog/2010/04/14/scanning-an-image-from-silverlight-4-using-wia-automation

Sugu.s 24-Apr-13 5:26am

Thanks for response.
I don't want to know how to set OOB in Silverlight 4. My requirement is elevated trust and in browser together for Silverlight 5 web application.

E.F. Nijboer 24-Apr-13 6:03am

Wouldn't the example work in sl5 too?

Sugu.s 24-Apr-13 5:27am

I have another issue. If i browse with Run as Administrator on windows 7, everything working fine. At same time i was not able to get either function to work on machine (windows XP). How to work with windows XP.

E.F. Nijboer 24-Apr-13 6:03am

http://stackoverflow.com/questions/11678646/enabling-in-browser-elevated-trust

http://xamlgeek.net/2011/04/20/silverlight-5-elevated-trust-in-browser/

Angela 10293848 23-Jan-14 1:44am

Hi could you resolve the problem with windows xp?I have a same problem,my code dose not work on windows sp

E.F. Nijboer 23-Jan-14 7:50am

If the answer isn't in one of the links already I would suggest to "Ask a Question" yourself here on codeproject, explaining your situation with some more details.

Angela 10293848 23-Jan-14 8:34am

I have problem in xp not in browser

E.F. Nijboer 23-Jan-14 9:59am

It would be better to create your own question because this is not the place to post a question. You could mention this question if it would help making your own question more clear but your problem is OS related and this is browser related, so not really the same problem actually.

Member 3394959 · Answer 2 · 2013-12-03T04:12:00

Solution 2

Sugu,

To work in IE, Just change ElevatedPermissions="Required" in InBrowserSettings.xml
code

HTML

<InBrowserSettings>
  <InBrowserSettings.SecuritySettings>
    <SecuritySettings ElevatedPermissions="Required" />
    <!--<SecuritySettings ElevatedPermissions="NotRequired" /> This is default-->
  </InBrowserSettings.SecuritySettings>
</InBrowserSettings>

Posted 3-Dec-13 4:12am

Member 3394959

Comments

Sugu.s 17-Dec-13 0:56am

Hi, already the ElevatedPermissions set as Required.