C# Discussion Boards - CodeProject

Christian Graus5-Jun-07 19:00

5-Jun-07 19:00

You can expose values as properties, or pass them using delegates.

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 )

Nine_5-Jun-07 20:04

Nine_

5-Jun-07 20:04

Can you give more explaination about how to do it with delegates?
Thankz Roll eyes | :rolleyes:

Christian Graus5-Jun-07 20:21

5-Jun-07 20:21

This[^] should do it.

ScottM15-Jun-07 20:20

5-Jun-07 20:20

How would you do this because I've had the same problem before and have had to find a less-than-perfect workaround. I don't think properties would work because the first form wont know when the selected index of the listbox on the second form has changed and therefore wont know when to update its textbox(unless you had a thread that continually checked). How would you use delegates to do it?

There are 10 types of people in the world, those who understand binary and those who dont.

Christian Graus5-Jun-07 20:22

5-Jun-07 20:22

smyers wrote:
I don't think properties would work because the first form wont know when the selected index of the listbox on the second form has changed and therefore wont know when to update its textbox(unless you had a thread that continually checked

That's why you use delegates.

smyers wrote:
How would you use delegates to do it?

Create a delegate that passes the value you want to broadcast, in the form with the control that changes. Hook this delegate to a method in the form that you want to inform of a changed value.

Nine_5-Jun-07 20:40

Nine_

5-Jun-07 20:40

So,delegates are the best answer?

Christian Graus5-Jun-07 20:48

5-Jun-07 20:48

Yes, almost always.

Nine_5-Jun-07 20:51

Nine_

5-Jun-07 20:51

Thankz for quick reply

ScottM15-Jun-07 20:51

5-Jun-07 20:51

They are the only answer

There are 10 types of people in the world, those who understand binary and those who dont.

ScottM15-Jun-07 20:52

C# application works on linux

5-Jun-07 20:52

Thanks, will try this out

There are 10 types of people in the world, those who understand binary and those who dont.

ComImport question

stebo07285-Jun-07 17:19

stebo0728

5-Jun-07 17:19

Does anyone understand ComImport usage?

I am trying to expand the XPBurn library to allow me to set the AudioGap field, which would in my estimation allow me to control the gap between cd tracks when burning an audio cd. My question is, in exploring the XPBurnCD class, the AudioGap field is read-only, and has no set function, so...i want to write a set function. The get function uses IPropertyStorage interface to retrieve this information from the drive, using a method called ReadMultiple(). IPropertyStorage also has a function WriteMultiple(), which i assume is the means to set this value rather than retrieve it. Exploring the XPBurnCom class, where all the ComImports are done, you find that IPropertStorage interface has both functions in it. My major question I guess, is that in XPBurn, in the get, IPropertyStorage is declared but never instanced, and then ReadMultiple is called from it, and it works, but if you try to call WriteMultiple the same way you get a compile error that propStg, the IPropertyStorage declared, in never instanced, so why does one function work that way but not the other, I guess that is where I am lost. I would really like to figure this out so that XPBurn can be advanced a little, also the same methoed should be used to set the VolumeName and WriteSpeed fields as well, which are also read only for the moment but would be nice if there were writable. Does anyone have any suggestions, I can post some code if need be

Thanks for any help

C#Coudou5-Jun-07 14:41

C#Coudou

5-Jun-07 14:41

Hi everyone,

I need a sample application that works on linux.

much better if you can give me some links. or sample codes.

thanks in advance,

Jeoffrey

to know everything is to know yourself...

Christian Graus5-Jun-07 15:07

5-Jun-07 15:07

I think you're looking for Mono. It's the .NET framework for Linux.

Paul Conrad5-Jun-07 15:35

Paul Conrad

5-Jun-07 15:35

Like Christian said, look at Mono. If I recall, it doesn't support WinForms in full. But, still worth looking at.

"That's no moon, it's a space station." - Obi-wan Kenobi

C#Coudou5-Jun-07 16:10

C#Coudou

5-Jun-07 16:10

I`ve read the MONO introduction recently. I will install this and code it here. How about my C# codes or i will start from a scratch.. Frown | :(

to know everything is to know yourself...

EvilInide5-Jun-07 20:08

EvilInide

5-Jun-07 20:08

In linux c# is called as GTK#
you can get alot of sample code and tutorials of c# in linux(GTK# ) from google.

evil

Brady Kelly5-Jun-07 23:31

Brady Kelly

5-Jun-07 23:31

That is hardly an accurate description. GTK# is not a language but a GUI toolkit that can be used by Mono.

EvilInide6-Jun-07 2:34

EvilInide

6-Jun-07 2:34

umm, mono is the framework like vs.net in windows for linux and gtk# is a C# binding of GTK+graphical library.
in linux
GTK->C & # -> #= GTK#

evilinside

Brady Kelly6-Jun-07 3:37

Brady Kelly

6-Jun-07 3:37

EvilInide wrote:

In linux c# is called as GTK#

Yes, so GTK# is not the linux name for C#.

.Net Drag and Drop

Sergio Paque5-Jun-07 14:05

Sergio Paque

5-Jun-07 14:05

Hi, i'm currently working with drag and drop between windows explorer and a form using the .net drag and drop.
I have a file and a directory with the same name and i want to drop one of them from explorer to my form.
Is there a way of telling whether the item i'm dropping into the form is a file or a directory?

Thanks in advance Smile | :)

Christian Graus5-Jun-07 15:06

5-Jun-07 15:06

Doesn't it deliver a path ? File.Exists will tell you.

Sergio Paque5-Jun-07 15:28

Sergio Paque

5-Jun-07 15:28

yep, it delivers the path, but the problem arises when there's both a file and a directory with exactly the same name. If I use File.Exists and I'm actually dropping the directory then I would get the wrong item.

Mark Greenwood5-Jun-07 15:35

Mark Greenwood

5-Jun-07 15:35

You will need to load the file in as a FileInfo and then look at the attributes to see if it's a directory or not...

<br />
FileInfo f = new FileInfo(strFileName);<br />
if ((f.Attributes & FileAttributes.Directory) == FileAttributes.Directory)<br />
{<br />
 // Delete it<br />
}<br />
else<br />
{<br />
 // Ignore it - or whatever<br />
}<br />

Vikram A Punathambekar5-Jun-07 17:40

Vikram A Punathambekar

5-Jun-07 17:40

You CANNOT have a file and a folder with the same name in the same location.

However, as already suggested, you can use the attributes to find out if the entity in question is a directory.

Cheers,
Vıkram.

After all is said and done, much is said and little is done.

ScottM15-Jun-07 20:10