Xml serialization exception [modified] - C# Discussion Boards

Sajjad Izadi10-Jun-08 10:16

10-Jun-08 10:16

hi friends,
i have a program which is for locking the screen (disappers the start menu and other windows) and the form of program appears and wants a password to login and then allows the user to continue his work.

in that program, the programmer has used user32.dll and kernel32.dll by DllImport class.

but the problem is that it works if you are a member of administrators. when i change my group to power users and run the program, an error appears ("an error occured, tell this to microsoft") and the program exits.

i have changed the security accesses of power users from the 'security' tab of windows xp (i have changed access of user32.dll and kernel32.dll in %windir%\system32\ to 'full control') but nothing changed and error again appeared when i run the program in a power user account.

what should i do if i want to use such programs (which uses DllImport) in non-administrator account?

thanks

modified on Tuesday, June 10, 2008 4:55 PM

Re: a security problem

Christian Graus10-Jun-08 11:10

Christian Graus

10-Jun-08 11:10

You don't need to be an admin to use dll import. You probably need to be one to use the APIs you are calling.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: a security problem

Sajjad Izadi10-Jun-08 11:17

Sajjad Izadi

10-Jun-08 11:17

thanks for your consideration,

you mean the problem can not be solved in any way?

what should i do to solve this problem?
is the problem for that *.Dll s?
how can i solve my problem then?

thanks again

Re: a security problem

Christian Graus10-Jun-08 11:24

Christian Graus

10-Jun-08 11:24

Sajjad Izadi wrote:
is the problem for that *.Dll s?

No, the problem is that you've chosen to call APIs that only work for an admin. You need to find a different way to do what you're trying to do, read the docs on the APIs you're calling and see which ones require admin, then find a differernt way.

[Message Deleted]

Sr...Frank10-Jun-08 10:13

Sr...Frank

10-Jun-08 10:13

[Message Deleted]

Re: AutoComplete Combobox!!!

teejayem10-Jun-08 10:18

teejayem

10-Jun-08 10:18

Quit Double Posting[^]

Don't be overcome by evil, but overcome evil with good

How to create a new ASPNETDB database?

allende10-Jun-08 9:02

allende

10-Jun-08 9:02

Hi friends,

I had a website running in my local computer with no problem. When I tried to uploaded to my server all the DB permissions were messed up. I tried to reproduce the error in my local PC but I ended up messing up my site config,

I'm using memberships to manage accesses to my site. I want to create a website from scratch so I will have a brand new ASPNETDB database. How can I do this? I have created several new websites in different folders in VS but that only created the App_Data folder with no database in it.

How can I start from scratch???

Thanks a lot

Xml serialization exception [modified]

Eric Burns10-Jun-08 8:33

Eric Burns

10-Jun-08 8:33

I have a class SubClass that inherits from class Base.

I have an array of type Base that I want to serialize. So, that the serializer knows about all the possible subclasses, I called the constructor like so:

XmlSerializer s = new XmlSerializer( ObjectType, extraTypes );

where extra types is an array of types that includes SubClass.

When I make this call to the constructor, I get the exception:

Outer exception: There was an error reflecting type 'Subclass'

Inner exception: Types 'Subclass' and 'Subclass' both use the XML type name, 'Subclass', from namespace ''. Use XML attributes to specify a unique XML name and/or namespace for the type.

There clearly aren't two classes with the same name or my code wouldn't have compiled.

Any thoughts on what my problem could be?

modified on Tuesday, June 10, 2008 3:03 PM

Re: Xml serialization exception

leppie10-Jun-08 23:41

leppie

10-Jun-08 23:41

Eric Burns wrote:
Any thoughts on what my problem could be?

Dump the xml schema from the Type/Graph and see why 2 different types are created.

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

CollectionEditor

Gareth H10-Jun-08 7:14

Gareth H

10-Jun-08 7:14

I have a Node that has a collection of Labels. The user can click on the node and view the properties in a PropertyGrid. If the user clicks on the collection of labels they can add/remove labels via the Collection Editor.

How do i listen for when the user has added a new label to the collection?

Regards,
Gareth.

(FKA gareth111)

Re: CollectionEditor

led mike10-Jun-08 9:52

led mike

10-Jun-08 9:52

Gareth H wrote:
How do i listen for when the user has added a new label to the collection?

What version of .NET are you in. AFAIK in 2.0 there are no notifications. The form makes a local copy (or even more than one) of the collection and modifies the copy and returns it to you (if I remember correctly). The way I dealt with that was I made my own form that was an exact duplicate of the built in one and added my own events to it, like OnAdd, OnDelete, OnChange or some such. Oh, also it modified directly the collection you gave it.

If you find a better way, particularly if something is added in 3.X, please a reply to me. Thanks.

led mike

Re: CollectionEditor

Gareth H10-Jun-08 10:19

Gareth H

10-Jun-08 10:19

led mike,

I am using .NET 3.5. I will carry on looking and tell you if i find anything.

Regards,
Gareth.

(FKA gareth111)

Thread and ProgressBar Problem

MumbleB10-Jun-08 6:09

MumbleB

10-Jun-08 6:09

I had some code in a Button event that took for ever to run causing my main form to freeze. To get past this I have now decided to move the processing to a sepperate Thread instead. Now I have a problem with the ProgressBar which gives me the below error when running the application.
Cross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.

Below is how I have changed the Button event and the start of my new thread.

private void btnRun_Click(object sender, EventArgs e)
{
    Thread excelrun = new Thread(RunExcel);
    excelrun.Start();
    lblPercent2.Visible = true;
    lblRecordProcessed.Visible = true;
    lblProgText.Visible = true;

    lblProgress.Visible = true;

}

And now the start code of the Thread.

        private void RunExcel()
        {
            string filepath;
            filepath = txtboxSelectTxtFile.Text;
            FileHelperEngine<readfile> engine = new FileHelperEngine&lt;ReadFile&gt;();
            engine.ErrorManager.ErrorMode = ErrorMode.SaveAndContinue;

            ReadFile[] res = engine.ReadFile(filepath, 1);
            ReadFile[] mes = engine.ReadFile(filepath);

            //Progress Bar stuff
            int progrval = 0;
            progrval = progressBar1.Value;
            progressBar1.Minimum = 0;
            progressBar1.Maximum = engine.TotalRecords;
            progressBar1.Visible = true; //This is where the error is thrown
</readfile>

Any help would be appreciated.

Excellence is doing ordinary things extraordinarily well.

Re: Thread and ProgressBar Problem

Judah Gabriel Himango10-Jun-08 6:16

Judah Gabriel Himango

10-Jun-08 6:16

This question gets asked a couple times a week in this forum. Did you try searching for your error message?

Short answer: you can access controls only from the thread that created them.

Longer answer: use a BackgroundWorker component to do your work. It has a ProgressReported and RunWorkerCompleted event which you are allowed to access your controls on.

Life, family, faith: Give me a visit.

From my latest post: "How differently the psalmist saw it! How blessed -- how truly happy with real joy! -- is the man who delights in the Law of the Lord."

Judah Himango

Re: Thread and ProgressBar Problem

MumbleB10-Jun-08 6:25

MumbleB

10-Jun-08 6:25

Thanks for the reply. I always search for answers before I ask but I get nothing returned when searching. Thanks again for the help. Much appreciated. Sigh | :sigh:

$Shucks | :-\$

Excellence is doing ordinary things extraordinarily well.

Double Post - Please ignore

Giorgi Dalakishvili10-Jun-08 6:24

Giorgi Dalakishvili

10-Jun-08 6:24

I have already answered you here:
Re: REfresging Form While process is running[^]

Please post there if you have any more questions.

Giorgi Dalakishvili

#region signature
my articles
#endregion

Re: Double Post - Please ignore

ellllllllie10-Jun-08 6:56

ellllllllie

10-Jun-08 6:56

Hello,
you should call the method that handle the progress bar using a delegate
so create a new delegate that point to the method and verything run usefull

dghdfghdfghdfghdgh

Re: Double Post - Please ignore

ellllllllie10-Jun-08 6:56

ellllllllie

10-Jun-08 6:56

Hello,
you should call the method that handle the progress bar using a delegate
so create a new delegate that point to the method and everything run usefull

dghdfghdfghdfghdgh

HttpWebRequest (Caching) problem?

Trapper-Hell10-Jun-08 5:40

Trapper-Hell

10-Jun-08 5:40

I have set up a simple application to connect to the internet and download the contents of a file from time to time, for example a file containing quotes that are to change on daily basis.

This has been set up correctly - the connection is made (using HttpWebRequest and HttpWebResponse...) and the contents are downloaded Smile | :)

. However, running the application more than once will than display the same contents that were first downloaded. This can go on from a few hours to a few days! WTF | :WTF:

I don't know what is going on, but I believe that the program is accessing some cache from somewhere instead of downloading the stream once again.

I need the program to download the stream from the internet every time it is running - and ignores any cache or whatever it is that is storing the stream data. What am I to do? Sigh | :sigh:

Re: HttpWebRequest (Caching) problem?

Judah Gabriel Himango10-Jun-08 6:19

Judah Gabriel Himango

10-Jun-08 6:19

Change the CachePolicy[^] of the HttpWebRequest.

Re: HttpWebRequest (Caching) problem?

Trapper-Hell10-Jun-08 6:23

Trapper-Hell

10-Jun-08 6:23

Thanks a lot pal. Just what I was looking for!

UI IP control in VS 2008 .. ?

Yanshof10-Jun-08 5:31

Yanshof

10-Jun-08 5:31

I looking for some way to show ip address in my UI ( Win Form ).
I don't find it in the standard controller of VS 2008.
I need something simple - like UI ip controller that was in MFC.

Someone can help ?
How can i find it in VS2008 ( C# )

Re: UI IP control in VS 2008 .. ?

Judah Gabriel Himango10-Jun-08 6:18

Judah Gabriel Himango

10-Jun-08 6:18

I don't believe there's a built-in WinForms or WPF IP address control. But a quick google search reveals several articles on this site that show how to create one.

How to use regex to fetch url's from a page???

Technobizz10-Jun-08 4:51

Technobizz

10-Jun-08 4:51

can anyone tell how to use regex to fetch url's from a page
i'm getting the whole page using webclient class.
i want to know how to use mshtml to parse the text of page and get the list of url's from it.
i want to know the way to use regex??

Paritosh Tripathi
B.Tech. (C.S.)

Re: How to use regex to fetch url's from a page???

Christian Graus10-Jun-08 5:00

Christian Graus

10-Jun-08 5:00

If you download Expresso ( www.expresso.com ) it will help you learn how to use regex. It probably has a sample regex in it for URLs, too.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.