Solved

How to Run a Silverlight enabled WCF service as a Specific Domain User

Posted on 2011-09-06
4
624 Views
Last Modified: 2012-05-12
I am using Silverlight 4 and a Silverlight Enabled WCF Service. I have a Print button which makes an Async call to my service...see service code below. The goal here is to get my service to automatically print a report  to a specific printer and drawer.

Using a Printer Settings object, it is listing the installed print devices for the service, which are not the printers installed on my machine.

We have found the following... "The user running the web service (usually the system or ASPNET account) must have a printer installed and must have permissions to print to that printer. Typically it's easiest to create a Domain account to run the web service. Then you can log in as that account, create a printer and test printing."

Another person suggested... "You should get the identity of the current user at a point in the service when you are scanning printers.  My guess is you are running as an anonymous user or someone other than your personal domain account.   If this is the case you need to run the service as a specific domain user with access to these printers."

We are running our service authentication at:
Anonymous - Disabled
ASP.NET Impersonation - Disabled
Form Authentication - Disabled
Windows Authentication - Enabled

How can I run the service as a specified domain user?


//SERVICE CODE BELOW
[OperationContract]
        public void PrintFormLetter(FormLetterReports reportInformation)
        {
            try
            {
                if (PolicyAdminManager.CanSendFormLetters() == true)
                {

                    FormLetterBasic flb = new FormLetterBasic(reportInformation); // creates the report

                    System.Drawing.Printing.PrinterSettings printSettings = new     System.Drawing.Printing.PrinterSettings();
                    printSettings.PrinterName = "Snagit 9";

                    ReportProcessor reportProcessor = new ReportProcessor();
                    reportProcessor.PrintController = new System.Drawing.Printing.StandardPrintController();

                    reportProcessor.PrintReport(flb, printSettings);
                }
            }
            catch (Exception e)
            {
                this.LogError(e, "PrintFormLetter");
                throw e;
            }
        }

 
0
Comment
Question by:farminsure
  • 2
  • 2
4 Comments
 
LVL 5

Expert Comment

by:zvytas
Comment Utility
You'll need to add the following to the web.config for the service:

    <system.web>
        <identity impersonate="true" userName="SomeUser" password="Password" />
        <authentication mode="Windows"/>
    </system.web>
0
 

Accepted Solution

by:
farminsure earned 0 total points
Comment Utility
I've read that impersonating all operations may increase attacks and negatively impact the security of your application. I simply want this one service method to impersonate. I found by adding this single line above my service method I'm now getting the list of printers on my machine and the report did print automatically! Thanks for your help though.

[OperationBehavior(Impersonation = ImpersonationOption.Required)]
0
 

Author Closing Comment

by:farminsure
Comment Utility
Found my own solution.
0
 
LVL 5

Expert Comment

by:zvytas
Comment Utility
Technically that's not what you've asked :)

How can I run the service as a specified domain user
0

Featured Post

How to improve team productivity

Quip adds documents, spreadsheets, and tasklists to your Slack experience
- Elevate ideas to Quip docs
- Share Quip docs in Slack
- Get notified of changes to your docs
- Available on iOS/Android/Desktop/Web
- Online/Offline

Join & Write a Comment

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Here I am going to explain creating proxies at runtime for WCF Service. So basically we use to generate proxies using Add Service Reference and then giving the Url of the WCF service then generate proxy files at client side. Ok, what if something ge…
Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

728 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now