Re: Access is denied when listen on a port - C# Discussion Boards

29-May-08 0:32

Hello everyone,

I am using Windows Server 2003. When call the Start method of HttpListener, there is the following exception -- System.Net.HttpListenerException: Access is denied.

Any ideas how to grant the access?

thanks in advance,
George

leppie29-May-08 0:43

leppie

29-May-08 0:43

You sure the port isnt in use already?

Are you running the HttpListener under sufficient privileges?

Are you trying to run this in an ASP.NET app?

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4 out now (27 May 2008)

George_George29-May-08 1:22

29-May-08 1:22

Thanks leppie,

1.

I am sure the port is not in use by using netstat tool.

2.

I am running a Windows service application written in C#. I am using account "NT AUTHORITY\NetworkService".

3.

I am not writing ASP.Net, I am writing a Windows service application.

Any ideas?

regards,
George

leppie29-May-08 3:12

leppie

29-May-08 3:12

George_George wrote:
I am running a Windows service application written in C#. I am using account "NT AUTHORITY\NetworkService".

Try running it under an Administrator account if possible. I cant recall if NetworkService user has both listen and connect rights.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

George_George31-May-08 2:03

31-May-08 2:03

Thanks leppie,

I found when using administrator account to run the service, everything is fine. So I think it may be the issue of using NT AUTHORITY\Network Service account, which is not granted enough privilege.

Now I am going to try to reproduce this issue, my current question is, when assign the log-on account back to NT AUTHORITY\Network Service, and clicks ok in SCM, there is an error message which indicates me to input a correct password for NT AUTHORITY\Network Service.

But I do not know the password for this account. And I want to reset the password for NT AUTHORITY\Network Service.

How to reset the password for this account? Normally to any other account in the Windows server 2003? I have this question is because I noticed a couple of the Windows Services on my local computer is using this account to log on, I do not want to impact other services when changing the password for account NT AUTHORITY\Network Service.

Any comments?

regards,
George

Zoltan Balazs31-May-08 2:29

31-May-08 2:29

Both the NT AUTHORITY\LocalService and NT AUTHORITY\NetworkService accounts are built-in accounts in Windows.
You can not use these accounts to log in to Windows and they not show up in the user management MMC snap-in.
These accounts have no password either, so when reseting the service to use the NT AUTHORITY\NetworkService just enter empty password.

George_George31-May-08 2:44

31-May-08 2:44

Thanks Zoltan!

I have successfully set the account, cool! I have a further question, is NT AUTHORITY a domain setup on local computer, I have this question because I noticed that there is a sign \ after it like normal domain name.

regards,
George

Zoltan Balazs31-May-08 2:52

31-May-08 2:52

It's the identifier authority (I didn't know that Smile | :)

)
Take a look at this link[^] for a detailed explanation.

George_George31-May-08 2:54

31-May-08 2:54

Really great! Thanks Zoltan!

regards,
George

Zoltan Balazs29-May-08 6:18

29-May-08 6:18

Did you try Local System Account?

George_George31-May-08 2:05

31-May-08 2:05

Thanks Zoltan!

Looks like you are correct, I have written my further questions here.

http://www.codeproject.com/script/Forums/View.aspx?fid=1649&msg=2577585[^]

Any comments and ideas?

regards,
George

Zoltan Balazs31-May-08 2:40

31-May-08 2:40

I suggested Local System account because it has full access to the computer.
Looks like the NT AUTHORITY\NetworkService has anonymous access to network resources and that is why it fails to create sockets.

George_George31-May-08 2:45

Custom Task Pane Close Button.

31-May-08 2:45

Thanks Zoltan!

I agree and accept your advice. I have written my further question here.

http://www.codeproject.com/script/Forums/View.aspx?fid=1649&msg=2577620[^]

regards,
George

Varad_Rajan29-May-08 0:13

Varad_Rajan

29-May-08 0:13

I am using a CutomTask Pane in Excel as an C# .NET ADDIN.
The custom task pane has a close button(X) at the right corner.
I need to not allow the user to close the Task Pane or disable the Close button(X) . Can anyone have any idea ?
Is there any way to trap the close(X) button and prevent user from closing it ?

I tried to trap the VisibaleStateChange event handler of Custom Task pane and try to show it again when user clicks the X button. But I am not successfull.

I am using the CreateCTP() COM function to create a custom task pane.

Thanks,
Rajan

ReportViewer on UserCotrol

irinabe28-May-08 22:33

irinabe

28-May-08 22:33

Hello,
When I'm placing ReportViewer on a from and design a report.rdcl for it, a BindingSource object is automatically generated for me.
However' when I place the ReportViewer on a UserControl, the BindingSource object isn't created and no report is displayed.

Is it a problem in my logic/code or is it a known limitation ... any how, if you have any kind of suggestions ... I'll be more then happy to listen Smile | :)

Thanks in advance

carbon_golem29-May-08 2:19

carbon_golem

29-May-08 2:19

No data == no report. Did you expect something else?

Scott P

“It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.”
-Edsger Dijkstra

irinabe31-May-08 19:26

irinabe

31-May-08 19:26

Hi.
Why are you picking on on words? Smile | :)

My real question was wether it was possible to put a reportViewer on a UserControl and how to make the BindingSource object to be created?
Thanks again

carbon_golem2-Jun-08 2:16

carbon_golem

2-Jun-08 2:16

It is possible to put the ReportViewer on a UserControl, however I don't think it necessary as it already is a control. To bind to objects, you first have to have an object with the data that you want to display. Note that how you want to display the data has an impact on how you should construct the objects. I started with the display, then worked back to the objects that I needed to fill and then created FactoryMethods to process data in my application to fill those "report objects". In the example below, iData.GetHeader() returns a List<Header>. If you're still unsure, you should consider getting a book on report services, it's a broad topic with slim resources on the internet.

ReportDataSource rpd1 = new ReportDataSource("Logic_Header", iData.GetHeader());
ReportDataSource rpd2 = new ReportDataSource("Logic_DataA", iData.GetReportDataA());
ReportDataSource rpd3 = new ReportDataSource("Logic_DataB", iData.GetReportDataB());

viewer.LocalReport.SetParameters(GenerateGenrlReportParams(GetCorrectedFont(myFont)));

viewer.LocalReport.DataSources.Add(rpd1);
viewer.LocalReport.DataSources.Add(rpd2);
viewer.LocalReport.DataSources.Add(rpd3);

viewer.RefreshReport();

Scott P