Re: ADO Null Referance - C# Discussion Boards

Ray Hayes15-Jul-02 4:41

15-Jul-02 4:41

Although I didn't get any success for my question here, I thought I'd post my solution incase anyone else is looking for the same:

In http://msdn.microsoft.com/msdnmag/issues/02/06/rich/rich.asp it mentions:

"The next tip is about virtual root settings. Surprisingly, if the IIS virtual root is set to allow execute permissions of 'Scripts and Executables,' your managed browser control will not be hosted by the browser because IIS will treat dll or exe like an ISAPI and try to run it. Setting the execute permissions for the virtual root to either "Scripts" or "None" will allow your control to be hosted."

So basically, my problem was with the web-server preventing the download of the DLL's, removing the "execute" fixed this...

Regards,
Ray

WinXP Style

Nnamdi Onyeyiri11-Jul-02 11:22

Nnamdi Onyeyiri

11-Jul-02 11:22

how do i make the form components to look like the XP controls?

[i bet its omethin reeeeealy simple, and im gonna feel stupid when i find out]

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Re: WinXP Style

Chris Rickard11-Jul-02 11:46

Chris Rickard

11-Jul-02 11:46

Believe it or not there's a little bit of work involved...
Eek! | :eek:

Using Windows XP Visual Styles With Controls on Windows Forms

Re: WinXP Style

Nnamdi Onyeyiri11-Jul-02 23:50

Nnamdi Onyeyiri

11-Jul-02 23:50

not that hard, all you gotta do is copy the xml they give you into a file of name <project>.exe.manifest and put it in the same directory as the prog and it runs wiv xp style.

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

ADO Null Referance

Steve Severance11-Jul-02 10:40

Steve Severance

11-Jul-02 10:40

I have an SqlCommand AuthUser which call a sproc in a database. When I call execute scalar it produces a NullReferanceException. Code below. Thanks.

private bool CustomAuthenticate(string username,string password)
{
AuthUser.Connection = Global.sqlConnection;
AuthUser.Parameters[0].Value = username;
AuthUser.Parameters[1].Value = password;
long ret = (long)AuthUser.ExecuteScalar();//Crashes here
return (ret > 0);
}

Steve

Not all who wander are lost...

Re: ADO Null Referance

Philip Fitzsimons11-Jul-02 11:59

Philip Fitzsimons

11-Jul-02 11:59

I'm kinda guessing that your stored procedure is returning null.... Roll eyes | :rolleyes:

Re: ADO Null Referance

Steve Severance12-Jul-02 3:19

Steve Severance

12-Jul-02 3:19

ok...Thanks. Is there a way that I can tell?

Steve

Not all who wander are lost...

Re: ADO Null Referance

Nick Parker15-Jul-02 18:15

Nick Parker

15-Jul-02 18:15

Steve Severance wrote:
ok...Thanks. Is there a way that I can tell?

Yes, not sure if you have tried this, but when you load up SQL Server Enterprise Manager you can run stored procedures from within the Query Analyser tool. Keep in mind that your stored procedure may return results, it may even return multiple results, however the ExecuteScalar() method will only extract the first column which could be null in your case. You may wish to consider using the ExecuteReader() method or changing your stored procedure to check for null values.

Nick Parker

Adding a Collection to the Property Browser?

Zombies with Coffee, LLC11-Jul-02 9:48

Zombies with Coffee, LLC

11-Jul-02 9:48

What I am needing for my current project is to allow the user to update a collection of objects from a component.

When you add a toolbar to your form, you can then click on the Buttons: (Collection) and the ToolBarButton Collection Editor then appears.

Now I want to do the same thing to my component. I want a RectTrackers: (Collection) property to appear! Smile | :)

I've tried the obvious stuff like

private RectTrackers pRectTrackerCollection = new RectTrackers( );

[Description( "List of all available Rectangle Trackers" )]
public RectTrackers RectTrackerProp
{
   get{ return this.pRectTrackerCollection;  }
   set{ this.pRectTrackerCollection = value; }
}

and it 'seems' to begin to work. The RectTrackers (Collection) property exists, but when I click on it, it is a Object Collection Editor that does not show my internal properties.

Anyone done a custom collection property yet?

Thanks!!

Re: Adding a Collection to the Property Browser?

Zombies with Coffee, LLC11-Jul-02 10:06

Zombies with Coffee, LLC

11-Jul-02 10:06

Well, I found a Microsoft example of them at

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/custcodegen.asp?frame=true

Trying to figure out the code now... Wish me luck.

Anyone like to comment on this, feel free :)

leppie11-Jul-02 9:42

leppie

11-Jul-02 9:42

What is the easiest way to overcome the following problem?

Controls created on one thread cannot be parented to a control on a different thread.

I have (rather had, struggle to figure it out again Frown | :(

a very complicated way using a public delegate on the parent form and calling it in a very "strange" way when the event was fired.

Thanx all for replying Smile | :)

READ MSDN

Re: Anyone like to comment on this, feel free :)

Rama Krishna Vavilala11-Jul-02 9:49

Rama Krishna Vavilala

11-Jul-02 9:49

Why do you want to do that? I never ever undertood the need to have two separate GUI threads in an app?

Re: Anyone like to comment on this, feel free :)

leppie11-Jul-02 10:07

leppie

11-Jul-02 10:07

thx

An event is fired from a threaded TCP connection. EG in my case, i receive a joined event from the network thread. The executed method for the event is executed on the network thread and not on the GUI thread, hence the error.

READ MSDN

System.WinForms

Nnamdi Onyeyiri11-Jul-02 9:39

Nnamdi Onyeyiri

11-Jul-02 9:39

Am i right in presuming this exists? i am using SharpDevelop, but when i try and compile my code, it tells me that WinForms does not exist in the System namespace Confused | :confused:

the message also says, are you missing an assembly reference, what assemblies do i need to reference to?

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Re: System.WinForms

Rama Krishna Vavilala11-Jul-02 9:42

Rama Krishna Vavilala

11-Jul-02 9:42

It's System.Windows.Forms Smile | :)

Re: System.WinForms

Nnamdi Onyeyiri11-Jul-02 9:44

Nnamdi Onyeyiri

11-Jul-02 9:44

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Re: System.WinForms

Zombies with Coffee, LLC11-Jul-02 9:50

Zombies with Coffee, LLC

11-Jul-02 9:50

Don't feel embarrassed, it was changed from beta to release.

Re: System.WinForms

Nnamdi Onyeyiri11-Jul-02 9:56

Nnamdi Onyeyiri

11-Jul-02 9:56

here's another one,

BorderStyle =FormBorderStyle.FixedDialog;

to set the border style, and it says it is a class where a vairable is expected

[sry for the n00be Q's, but im a n00be to c#]

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Re: System.WinForms

leppie12-Jul-02 0:34

leppie

12-Jul-02 0:34

Nnamdi Onyeyiri wrote:
BorderStyle =FormBorderStyle.FixedDialog;

like:

form.FormBorderStyle = FormBorderStyle.FixedDialog; or this.FormBorderStyle = FormBorderStyle.FixedDialog; if you are calling from the form. Note the object reference (form or this)

Are you sure you are not using an old version of SharpDevelop (latest available on sourceforge.net , latest ver 0.88b??? ) or the .NET Framework.

READ MSDN

Re: System.WinForms

Nnamdi Onyeyiri12-Jul-02 0:41

Nnamdi Onyeyiri

12-Jul-02 0:41

iam sing the latest version, its just that i was using an add-in for vs6 that turns your dialog resource into c# code [co0l aint it] it does not have support for all controls but that can be added fairly easy [so its stated]. I found this article on CodeGuru [newin].

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Again IIS

Mazdak11-Jul-02 5:18

Mazdak

11-Jul-02 5:18

How can I change setting in IIS programmitically.For example change read/write permission of web applications in IIS.

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Re: Again IIS

Richard Deeming11-Jul-02 6:03

Richard Deeming

11-Jul-02 6:03

Same thing again: System.DirectoryServices with the IIS provider. MSDN has the documentation under IIS programmers guide.

This sample will dump out the entire structure of the metabase:

using System.DirectoryServices;
...
void testIIS() {
    DirectoryEntry oDE = new DirectoryEntry("IIS://localhost/W3SVC");
    Console.WriteLine("[{1}] {0}", oDE.Path, oDE.SchemaClassName);
    recurseObj(oDE.Children, 1);
    oDE.Dispose();
}

void recurseObj(DirectoryEntries parent, int level) {
    if (parent==null) return;
    foreach (DirectoryEntry oDE in parent) {
        Console.Write(new String(' ', level * 2));
        Console.WriteLine("[{1}] {0}", oDE.Path, oDE.SchemaClassName);
        recurseObj(oDE.Children, level + 1);
        oDE.Dispose();
    }
}

Re: Again IIS

Mazdak11-Jul-02 9:29

Mazdak

11-Jul-02 9:29

Thank you for your help. Smile | :)

Mazy

"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down

Listing Local Users

Ben Swann11-Jul-02 4:29

Ben Swann

11-Jul-02 4:29

I am trying to list all the local users, groups, domains etc attached to the
local machine.

I haven't been able to find anything in the .net docs. I am not sure if there
is no support for it due to the .net environment being a standalone run time.
Thus having to call the win32 api directly in order to accomplish this task.

I was reading into the WMI without any joy.

Any thoughts.

Re: Listing Local Users

Richard Deeming11-Jul-02 5:44

Richard Deeming

11-Jul-02 5:44

Use System.DirectoryServices with the WinNT provider. It's pretty much the same as using ADSI.

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