drag/drop to Windows Explorer - C# Discussion Boards

Re: NumericUpDown with XP/System theme, possible?

29-Dec-03 9:39

Read the Theme API documentation - it's really not too hard to use. Since the topic isn't actually called "Theme API", search for this function and sync your TOC to see the entire topic: OpenThemeData.

I think I saw some here on CP about using this, but never forget google.

-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----

Roriok29-Dec-03 9:42

Roriok

29-Dec-03 9:42

Thanks for the quick replies guys, I'll check it out.

taskbar

hebzzz29-Dec-03 7:54

hebzzz

29-Dec-03 7:54

i am doing a program and i put main() in my first form,i want to make my program appear in the taskbar(tray),this code need to have main in it ,and project mustn't have two main()???any help

Re: taskbar

Heath Stewart29-Dec-03 8:52

drag/drop to Windows Explorer

29-Dec-03 8:52

See the NotifyIcon component documentation. There are also a few articles on the subject here on the CP site. Your application needs only one static Main method (an application should have only one entry point to execute the application) and use the NotifyIcon to add an icon to the system tray.

elena1234529-Dec-03 6:26

elena12345

29-Dec-03 6:26

Do you know if there is a way to get a message from Windows Explorer when my application is about to drop data into it?
At this point I am calling
control.DoDragDrop(dataVar, DragDropEffects.All);
when drag is triggered?

The problem is that I have to create a bunch of files and it takes a while, so I'd like to do all that OnDrop instead of OnItemDrag in case the user decides to cancel.

Another problem is that the dataVar needs to be in different formats depending on whether the user is dragging internally or externally (to windows explorer). I have no idea how to do that.

Any help would be appreciated,

Elena

Elena

Re: drag/drop to Windows Explorer

Tristan Rhodes29-Dec-03 7:57

Tristan Rhodes

29-Dec-03 7:57

Unfortunately, this is not as easy as is hoped. I was looking for something similar, if not identical, and it's not just a case of droping an object into the windows enviroment.

I've been trying to figure this out for weeks now, and i've had to go an look at COM and IDL to study the interfaces used by objects in unmanaged code to handle streams, before I can even begin to grasp how it would work in managed code.

It's all fun and games if you enjoy going balled through hair tearing though Smile | :)

I'm sure Heath will be able to fill you in far better than I can, but this is just a warning from someone who's stuck on the same thing!

Cata

Re: drag/drop to Windows Explorer

Heath Stewart29-Dec-03 8:55

Multi Page / Frame TIFF File

29-Dec-03 8:55

As Cata mentioned, this has all been covered in the past. Search this forum for previous posts. You could also look at Catalysts's profile and see the messages posted. Most of them are related to this problem.

ttnetworks29-Dec-03 4:16

ttnetworks

29-Dec-03 4:16

Hi,

Im looking for some sample code in C# which shows how to access multiple frames / pages in a TIFF image file and display them in a PictureBox Control.

I have researched the area and found a sample application in VB.Net but i cant seem to convert it correctly.

I have a problem getting the list of GUID's out of the image...

Thanks

Andrew

Re: Multi Page / Frame TIFF File

Heath Stewart29-Dec-03 5:38

Enable / Disable Cloned Context Menu Items

29-Dec-03 5:38

VB.NET and C# (and all other languages that target the CLR for that matter) use the same class libraries and all compile to IL. It's important to understand the Framework technology, not the language! VB.NET isn't that hard (hell, code monkeys have been using it - and coincidentally creating bad apps - in straight VB for years). Just remember that most of the calls are probably just to classes, methods, properties, structs, etc. that are just as accessible in C# as they are in VB.NET.

Daniel Negron29-Dec-03 4:09

29-Dec-03 4:09

I have cloned the mainMenu to the context Menu. If I set the .Enabled or .Disabled in the form load event. These feature works properly. But If I minimize the form to use the contextMenu, the mnHide menuItem is not Hidden. If I click on Hide when the form is hidded, this causes the form to be squeezed to just the min, max and close buttons, when I do finaly hit the Show button.

Right now my issue is getting the mnHide button to hide, but this isn't working? Is there another way to hide the cloned context menu items ?

//
//contextMenu1
//
this.contextMenu1.MenuItems.Add(mnShow.CloneMenu());
this.contextMenu1.MenuItems.Add(mnHide.CloneMenu());

private void contextMenu1_Popup(object sender, System.EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized)
{
this.mnShow.Enabled = true;
this.mnHide.Enabled = false;
}
else
{
this.mnShow.Enabled = false;
this.mnHide.Enabled = true;
}
}

Thanx in advance for your help.

**DAN**

Heath Stewart29-Dec-03 5:45

29-Dec-03 5:45

mnShow and mnHide are not the correct objects to enable / disable. Remember, you cloned them so they are not the same object reference. Instead, try something like this:

Menu mnShowClone = mnShow.CloneMenu();
Menu mnHideClone = mnHide.CloneMenu();
this.contextMenu1.MenuItems.Add(mnShowClone);
this.contextMenu1.MenuItems.Add(mnHideClone);
 
// ...
 
private void contextMenu1_Popup(object sender, EventArgs e)
{
  mnShowClone.Enabled = this.WindowState == FormWindowState.Minimized;
  mnHideClone.Enabled = !mnShowClone.Enabled;
}

Daniel Negron29-Dec-03 9:00

29-Dec-03 9:00

when I try to create a new reference to I get :

**The type or namespace name 'mnShowClone' could not be found (are you missing a using directive or an assembly reference?)**

Am I just supposed to be referencing the Menu itself or the MenuItem ?

**DAN**

Heath Stewart29-Dec-03 9:37

29-Dec-03 9:37

Wherever you cloned your menus, those mnShowClone and mnHideClone menus have to be accessible, i.e. if you declare them inside a method they will not be available inside another method. Instead, add them as class fields (just like mnShow and mnHide) and assign them if they haven't been assigned already (as part of initialization code or something).

Anonymous29-Dec-03 10:51

Anonymous

29-Dec-03 10:51

Unbelievably, as easy as this may be, for myself it is still not working.
private void InitializeComponent()
{
... excess code removed
//
// contextMenu1
//
MenuItem mnShowClone = this.mnShow.CloneMenu();
MenuItem mnHideClone = this.mnHide.CloneMenu();
// MenuItem mnShowClone = this.mnShow.CloneMenu();
// MenuItem mnHideClone = this.mnHide.CloneMenu();

this.contextMenu1.MenuItems.Add(mnShowClone);
this.contextMenu1.MenuItems.Add(mnHideClone);
this.contextMenu1.Popup += new System.EventHandler(this.contextMenu1_Popup);
}

public void contextMenu1_Popup(object sender, System.EventArgs e)
{
// mnShow.Visible = true;
// mnHide.Visible = false;
mnShowClone.Enabled = this.WindowState == FormWindowState.Minimized;
mnHideClone.Enabled = !mnShowClone.Enabled;
// if (this.WindowState == FormWindowState.Minimized)
// {
// this.ConmnShow.Enabled = true;
// this.mnHide.Enabled = false;
//
// }
// else
// {
// ;
// this.mnShow.Enabled = false;
// this.mnHide.Enabled = true;
// }
}

The lower portion of the last bit of code was what was working when I did not include a MainMenu.

Thanks for you help

**DAN**

Daniel Negron29-Dec-03 10:53

29-Dec-03 10:53

Opps Sorry I posted as Anonymous

**DAN**

Daniel Negron30-Dec-03 4:04

30-Dec-03 4:04

OK, Today I have my Head screwed on. I got it. I just created a seperate method for creating the contextMenu.

Thank you for your help Heath

**DAN**

Clearing the Console

extremeg29-Dec-03 3:54

extremeg

29-Dec-03 3:54

How can clear the DOS Console from a C# console application.

...the mind is not a vessel to be filled but a fire to ignited

Re: Clearing the Console

Heath Stewart29-Dec-03 5:30

29-Dec-03 5:30

This will be possible in either .NET 2.0 or Longhorn (no sure exactly which since release details are still sketchy) with Console.Clear, but for now you have to rely on other ways. One article here on CP presents such a way: http://www.codeproject.com/csharp/winconsole.asp[^].

There's also a programmatic way, but you'll have to P/Invoke some native functions: http://support.microsoft.com/support/kb/articles/q99/2/61.asp[^].

Re: Clearing the Console

Hauptman(n)29-Dec-03 8:51

Hauptman(n)

29-Dec-03 8:51

but with this method, you give up your portability
antoher method is, when you fill up the Console with
\n (i mean the escape sequence)

scio me nihil scire
My OpenSource(zlib/libpng License) Engine:
http://sourceforge.net/projects/rendertech

Re: Clearing the Console

Heath Stewart29-Dec-03 9:35