C# Discussion Boards - CodeProject

Re: drag&drop

_mubashir11-Apr-07 1:29

_mubashir

11-Apr-07 1:29

Wow...
we would luv to help if you try and explain it in simple English

Mubashir
Software Architect
Storan Technologies Inc, USA
Every job is a self portrait of the person who did it.

C# and COM for x64

Simon D Smart11-Apr-07 0:26

Simon D Smart

11-Apr-07 0:26

I am not sure whether this is a C# or COM issue, but I thought I'd try it here.

We have been building a COM wrapper around a C++ API which needs to be accessible from C#. This seemed to work and run fine as a win32 build with.

Converting to x64 however, despite everything seeming to compile, and being able to access the COM stuff correctly from a c++ application, as soon as we try to add it to C# everything seems to go wrong.

Normally one can click "Add Reference" and then select the type library from the list - and this works fine in x86/win32. However, with the 64bit build, the type library does not appear, and selecting the dll manually gives errors implying that it does not contain any COM components - despite working fine with a c++ project.

Looking in the registry etc. the correct entries seem to be make under HKCR/Typelib/<lib>/win64... exactly as for the win32 case - but I still can't see it from C# in visual studio, or VB for that matter, so I am somewhat at a loss...

Has anyone got any ideas as to what to look for

Re: C# and COM for x64 [modified]

Ed.Poore11-Apr-07 1:20

Ed.Poore

11-Apr-07 1:20

I'm just taking a wild stab here but it's probably because C# is by default 32-bit. This page[^] seems to back me up.

[edit]Looks like you can modify the build properties of the C# project for "Any CPU" to host 64 bit processes.[/edit].

Last modified: 1min after originally posted --

Re: C# and COM for x64

Simon D Smart11-Apr-07 5:40

Simon D Smart

11-Apr-07 5:40

Thanks, but we had already switched the build properties to x64 for all the applicable project options.

On further investigation, it appears to be some form of registration issue, as such COM rather than C#. Using OleView it gives a "Library Not Registered" error, despite it showing up in the TypeLib list, and the registry keys appearing to be set exactly the same as for the 32bit build, except for win64 rather than win32.

The really obscure thing is that when I cheat and change the win64s to win32s in the registry it all seems to work despite the registry keys being blatantly wrong :-s, as it should be able to support both win32 and win64 simultaneously...

Anyway, I'll probably go and poke some COM people at some point rather than C# people.

how to find the error in xml file in C#.

gpremkamal10-Apr-07 23:33

gpremkamal

10-Apr-07 23:33

hi every one

how to find the error in xml file.

i am writing a application in that iam using xml file.
but if any error in xml file that exe not working.
i want to know error in xml file while opening my application.

Re: how to find the error in xml file in C#.

blackjack215010-Apr-07 23:47

blackjack2150

10-Apr-07 23:47

Load your xml file in an XmlDocument object inside a try-catch block before at he beginning. If you catch an exception close your app or show a message to the user or do whatever you need.

Re: how to find the error in xml file in C#.

Stevo Z11-Apr-07 2:57

Stevo Z

11-Apr-07 2:57

There is a utility called Notepad++ a and XML plugin available at same site. Try that, if you are working with larger amout of data, it will save you a lot of time and nervers Smile | :)

))

Re: how to find the error in xml file in C#.

Jaiprakash M Bankolli11-Apr-07 3:20

Jaiprakash M Bankolli

11-Apr-07 3:20

I would suggest you to create an XSD (schema definition), This will validate the XML for correctness. After loading XML, Use the validateSchema method and pass required XSD and check for the correctness.

Hope this helps

Regards,
Jaiprakash M Bankolli
jaiprakash.bankolli@gmail.com
http://jaiprakash.blog.com/

UML in visula studio 2005

aminowest10-Apr-07 23:13

aminowest

10-Apr-07 23:13

I want to draw class diagram inside visual studio 2005 web application. I know that i can add a new item of type "class diagram" to my solution but the .net class diagram is very poor. I can't add multiplicty for my relation. I can't add an association class. I can't make a dependency between two classes. so, can anyone help me to find a better way to draw a good class diagram and to get the generated C# classes from it?
Thank You

Ahmed Amin

Re: UML in visula studio 2005

Pete O'Hanlon10-Apr-07 23:31

Pete O'Hanlon

10-Apr-07 23:31

No cross posting.

Deja View - the feeling that you've seen this post before.

Re: UML in visula studio 2005

Jaiprakash M Bankolli11-Apr-07 3:22

Jaiprakash M Bankolli

11-Apr-07 3:22

I would suggest you to install some UML tool that has plug ins that are appended into VS environment. And start using them, one such tool that is coming to my mind is VisualUML. Hope this helps you

Regards,
Jaiprakash M Bankolli
jaiprakash.bankolli@gmail.com
http://jaiprakash.blog.com/

Re: UML in visula studio 2005

Morantex11-Apr-07 7:56

Morantex

11-Apr-07 7:56

Check out Enterprise Architect from Sparx, they have an add-in for VS 2005 and Microsoft officially chose them as their provider for UML support in Visual Studion.

reference problem, plz help

akkram10-Apr-07 23:00

akkram

10-Apr-07 23:00

Hi, I have a reference problem that I would like some help with. Say I have a windows form with a treeview on it. From this form I create a controller and passing a reference to the form;

controller = new Controller(this);

This controller class handles user events and builds the treeview with a couple of nodes on the windows form by calling a method in the form, so far so good.

But say I want to have another controller that can add one node to the treeview. How do I best reference the winform method that is responsible for adding one node to its treeview?

/hope I make any sense

Re: reference problem, plz help

Christian Graus10-Apr-07 23:06

Christian Graus

10-Apr-07 23:06

Sounds like you're building an OO nightmare. Why would you need all these controllers ?

The way I'd do it is to add delegates that hook the controller to the UI, so the controller can call methods which change the state of the app, the presentation layer ( the form ) should be responsible for how that data is displayed, for example, in a tree view.

Actually, I was assuming you're using MVC, but you can't be, the controller is all about accepting input, which has nothing to do with how the view is rendered at all. What do you mean by controller ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: reference problem, plz help

akkram10-Apr-07 23:33

akkram

10-Apr-07 23:33

Well im using delegates to hook up the controller to the UI, this all works fine for me in a simple scenario (one view, one controller). But now im trying to do a more realistic scenario with a couple of forms (mdiparent/childs). As I understand it you typically have one controller for each set of related functionality. Then one controller should be able to handle user input and call methods on different forms?

Picture in DataGrid With Every Category

sheebalam11110-Apr-07 22:47

sheebalam111

10-Apr-07 22:47

I wana add Picture to datagrid with respect of every category..
etc is the category is Mobile i want mobile picture to be displayed in datagrid..
Does any have the code

sheeba

Re: Picture in DataGrid With Every Category

Christian Graus10-Apr-07 22:50

Christian Graus

10-Apr-07 22:50

Your question (despite being asked twice) is incomplete. You can show any picture you want, the question is, how are you determining the category ? Is this a windows application, or a web app ?

Re: Picture in DataGrid With Every Category

sheebalam11110-Apr-07 22:57

sheebalam111

10-Apr-07 22:57

Im working on Webapplication in Visual C# .Net and have database Table for CategoryId,Category and CategoryImage...

i want to display when the user Add any Item in the Database and Choose anyCategory From Dropdown list it display the Respective picture for that Category

sheeba

Re: Picture in DataGrid With Every Category

Christian Graus10-Apr-07 23:05

Christian Graus

10-Apr-07 23:05

OK, then you should be asking in the ASP.NET forum, or you should at least make that clear. Otherwise, the answers you get will be no good.

You need to put an img tag in the template for a column of your grid, and set the URL to the image based on the data member that tells you the category. So you'd have a method that's passed the data and returns the URL of the image.

help here...open file from different directory

Missy Glory10-Apr-07 22:35

Missy Glory

10-Apr-07 22:35

Hi everyone,
i want to open my file from different directory for eg in c: drive,D: drive...or is there anyway that can allow mi to open my instruction.rtf file directly
Below is the code that i can open my file from C: drive.

System.Diagnostics.Process.Start(@"C:\Documents and Settings\Lohsk\My Documents\XIUJUAN_P6_Program1\Instruction.rtf");

thanks Big Grin | :-D

Re: help here...open file from different directory

Christian Graus10-Apr-07 22:42

Christian Graus

10-Apr-07 22:42

I'm not sure of the question. You can put any path you want in to Process.Start.

how to create Control Array in ASp.net(web) form using c#

jaganil10-Apr-07 22:22

jaganil

10-Apr-07 22:22

Hi All

i need to create Control(i.e Dropdownbox ) Array in place it on web page on exact position how it to do

anyone help
thanks and regard's

Anil Jagdale

Re: how to create Control Array in ASp.net(web) form using c#

Christian Graus10-Apr-07 22:29

Christian Graus

10-Apr-07 22:29

Why do you need an array ? A web page has a controls array already, although it's nested.

To put a page in an exact position on a web form, you need to use CSS to position it. Otherwise, it will use a standard HTML 'flow' layout.

Transparency in windows forms - doesn't work on some pcs

Delta-Z10-Apr-07 21:59

Delta-Z

10-Apr-07 21:59

Hi I have created an application with transparent main window that displays some text. To initially display and change the text, I use the following code:

if (behavior.IsVisible)
{
                Show();
                mImage = new Bitmap(Width, Height);
                Graphics dc = Graphics.FromHwnd(Handle);
                dc.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
                SizeF size = dc.MeasureString(behavior.DisplayText, behavior.Font);
                dc.Dispose();

                Height = (int)size.Height + 1;
                Width = (int)size.Width + 1;
                mImage = new Bitmap(Width, Height);
                dc = Graphics.FromImage(mImage);
                dc.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;

                Color background = (behavior.Color.ToArgb() == Color.White.ToArgb()) ? Color.Black : Color.White;
                dc.Clear(background);

                dc.DrawString(behavior.DisplayText, behavior.Font, new SolidBrush(behavior.Color), 0, 0);
                mTextColor = behavior.Color.ToArgb();

                dc.Dispose();

                BackgroundImage = mImage;
                TransparencyKey = background;
}
else
{
                Hide();
                BackgroundImage = null;
}

For some reason the window shows transparent on my PC and at least one other, while on most I still get a white background (i.e. no transparency). The only difference I can think of is that on the PCs where the transparency displays correctly, VS2005 is installed, while it's VS2003 or none on the others (I'm using latest video drivers etc).
Does anyone know of this issue and how to fix it?

Thanks,
Dmitry

Re: Transparency in windows forms - doesn't work on some pcs

blackjack215010-Apr-07 22:07

blackjack2150

10-Apr-07 22:07

I'm not 100% sure, but I think that transparent windows can only be rendered in Windows XP.

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