C# Discussion Boards - CodeProject

Re: C# controls in W2K...

30-Jan-04 9:53

ActiveX is a technology, not a language. You can write one in C++, C#, VB, VB.NET, and many more that are COM compatible. If you write this in .NET, it will require the .NET runtime to be installed, just like Java requires the JRE, C/C++ requires the C/C++ runtime, VB the VB Virtual Machine, etc.

If you don't want to have to install the .NET Framework, then write it in C/C++ and VB, but make sure you include their runtimes (albeit much smaller).

-----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-----

Nick Parker30-Jan-04 11:09

Nick Parker

30-Jan-04 11:09

Tom Larsen wrote:
Is that a tautology?

Good word Tom! Smile | :)

- Nick Parker
My Blog

2D Arrays, something strange

bouli30-Jan-04 5:36

30-Jan-04 5:36

Hi there,
I'm a newbie in C# and comming from C++/MFC.

I'm building my first application in C#.

I have created a class derived from Object

public class Block : Object
{
Block()
{ Initialize(); }

public bool Initialize()
{ Debug.WriteLine("Block.Initialize"); ... }
...
}

As the array is a 2D array of Block, I have instanciated the arry like that:
Block[,] board=new Block[m_nHeight, m_nWidth];
while default values for m_nHeight is 20 and m_nWidth is 10.

When I look at the trace, I see only 0 calls for the method Block.Initialize. Confused | :confused:

How can it be possible? Are all the Block object created when I do "m_board=new Block[m_nHeight, m_nWidth];"??? or must I browse the array and call m_board[i, j]=new Block()? If all blocks are created, I should get 200 lines of "Block.Initialize"...

Can anybody explain what's wrong?

Best regards.

Thanks.

Heath Stewart30-Jan-04 9:49

30-Jan-04 9:49

First of all, you don't need to derive from Object. If you don't specify a base class, Object is assumed. This just looks bad.

Second, you're not creating a new instance of Block, only a new Block[] array (which is of type Array). You won't create a new instance of Block until you use new:

Block[,] board = new Block[m_nHeight, m_nWidth];
board[0, 0] = new Block();

Find more information about arrays at http://msdn.microsoft.com/library/en-us/csref/html/vclrfArraysPG.asp[^].

bouli31-Jan-04 0:38

31-Jan-04 0:38

Hi,

Thanks for the answer.
So, if I undertand well, in C#, I need to browse my array and instanciate a "new Block" for each cells of the array right?

Heath Stewart1-Feb-04 14:06

1-Feb-04 14:06

Yes, only it's "iterate" not "browse".

Microsoft MVP, Visual C#
My Articles

bouli1-Feb-04 19:55

1-Feb-04 19:55

so, I do a the following:

<br />
...<br />
m_nHeight=20;<br />
m_nWidth=10;<br />
...<br />
m_board=new Block[m_nHeight, m_nWidth];<br />
for (int i=0; i < m_nHeight; i ++ )<br />
  for (int j=0; j < m_nWidth; j ++ )<br />
    m_board[i, j]=new Block();<br />

but a strange thing, I have inserted a trace inside the constructor of the Block class, and when I look at the trace, instead of having 200 calls of Block.Block, I have 400 calls Confused | :confused:

20x10=200...

Heath Stewart2-Feb-04 2:40

2-Feb-04 2:40

You had a trace in your Initialize method before. Are you sure you're not getting 200 lines with "Block.Block" and 200 lines with "Block.Initialize"? If not, I'd really need to see the rest of the Block class code and the full creation block in which you gave a fragment of above.

Microsoft MVP, Visual C#
My Articles

bouli2-Feb-04 4:13

Remoting Problem: How to unregister a WellKnownClientType?

2-Feb-04 4:13

Hi Heath,

I have rebuild the code, and indeed, there are 200 calls now Smile | :)

Thanks

occcy30-Jan-04 4:23

occcy

30-Jan-04 4:23

Hi!
I use RemotingConfiguration.RegisterWellKnownClientType(typeof(type),url) to register a type as a wellknown client type. Is it possible to unregister this type to register it again with another url (or to change the url for the registered type) without restarting my application?

Re: Remoting Problem: How to unregister a WellKnownClientType?

Heath Stewart30-Jan-04 5:21

Re: Remoting Problem: How to unregister a WellKnownClientType?

30-Jan-04 5:21

First, let me advocate that a well-known client Type can't be well-known if you change its URI.

That being said, you can use RemotingServices.Disconnect. If you have a reference to the registered object, just pass it to the static Disconnect method. If you don't have an instance of it available, you can get one using other methods of the RemotingServices class.

Registering it with another URI is as simple as what you've already done.

Another way is to simply shut down the .NET Remoting host, such as a Windows Service, IIS, or some other program, but that's most likely not what you want in this case.

occcy1-Feb-04 20:50

occcy

1-Feb-04 20:50

Hi!
Thanks for your effort!
Unfortunately doesn't work it...
I want to explain the situation more detailed:

When the client starts his application, he get's a login-dialog, where he has to type in the servername (and username, password ....) he wants to connect to. When the client types in a servername, that does not exist or the server is not available, he must get a new chance to login, without restarting his application.

When he clicks the Login-Button I do something like this:

<br />
  Dispather MyDispatcher;<br />
  RemotingConfiguration.RegisterWellKnownClient(typeof(Dispatcher),URL);<br />
  MyDispatcher=new Dispatcher();<br />
  MyDispatcher.Login(...);<br />
   ...<br />

If an error occures (severname incorrect or server not available) I have to unregister this Dispather-object first, before I can register it again with another URL. RemotingServices.Disconnect(Dispatcher) does not work, because it's for Serverobjects. And Reregistering (with RegisterWellKnownClient) throws an exception ("System.Runtime.Remoting.RemotingException: Es wurde versucht, die bereits umgeleitete Aktivierung des Typs 'Dispatcher, ccShared' erneut umzuleiten."). D'Oh! | :doh:

What can I do?
Thanks in advance!

Re: Remoting Problem: How to unregister a WellKnownClientType?

occcy1-Feb-04 22:35

occcy

1-Feb-04 22:35

I found a solution for this problem by myself!
My Server marshals the Serverobject (RemotingServices.Marshal) and my Client connects that object (RemotingServices.Connect).

send to fuction in Windows

Kenneth_i30-Jan-04 4:07

Kenneth_i

30-Jan-04 4:07

Hi, I'm seeking a way to emulate "Send To" function.

I just need to pass a file to .MAPIMail (it can pass a file to the default mua). .MAPIMail is normally located in C:\Documents and Settings\Default User\SendTo\ but doesn't have to use them. Simply prepare a file named like foo@test.local.MAPIMail (zero-byte) and drop a file with explorer. It'll attache the file to the default mua.

If anyone knows about this, please let me know. I'm willing run the default e-mail client and a file attached.

Thanks in advance.

Re: send to fuction in Windows

Mazdak30-Jan-04 4:40

Mazdak

30-Jan-04 4:40

I want Send To function for one of my C# projects too and in that time I couldn't find a .NET way for it, so I wrote a Shell Extension which do some task for my SEND TO function and register it with my application. But as I'm thinking now , those steps are doable in .NET too(not sure). This[^] article show you the VC6 way. If you couldn't translate it to .NET at least you can make that dll in VC6 which handle your job.

Mazy

No sig. available now.

Re: send to fuction in Windows

Kenneth_i30-Jan-04 13:54

Kenneth_i

30-Jan-04 13:54

Thanks Magy. So, it sounds like there is no way in C# and I at least need to import a dll.

Re: send to fuction in Windows

Mazdak30-Jan-04 4:57

Mazdak

30-Jan-04 4:57

For more help on Shell in C# you could search this site too.

Mazy

No sig. available now.

Selected text in TreeNodes

Anonymous30-Jan-04 3:50

Anonymous

30-Jan-04 3:50

Hi,

I have the problem to get the selected text of a TreeNode. I want to put the selected text of a TreeNode into the clipboard. But I found no solution to get the selected text.

Is there anybody who has an idee?

Regards

Frank

Guinness4Strength30-Jan-04 3:56

Guinness4Strength

30-Jan-04 3:56

When you say selected text you mean the user has "highlighted" a portion of the node label with the mouse and you want that higlighted text only ?

Anonymous30-Jan-04 4:00

Anonymous

30-Jan-04 4:00

Yes, I mean (like in TextBoxes), the part of the text which is selected (with the mouse or with the keyboard).

Only when the TreeNode is in edit mode (SelectedNode.IsEditing).

Guinness4Strength30-Jan-04 4:12

Guinness4Strength

30-Jan-04 4:12

Have your tried casting the selected node as TextBox and using the SelectionStart and SelectionLength properties ?

Guinness4Strength30-Jan-04 4:40

Guinness4Strength

30-Jan-04 4:40

Another not-so-simple resolution would be to create your own TextBox and handle the edits yourself.

private void tvTestTree_BeforeLabelEdit(object sender, System.Windows.Forms.NodeLabelEditEventArgs e)
{
	e.Node.EndEdit(true);
	TextBox MyEdit= new TextBox();
	Rectangle IRect = e.Node.Bounds;
	MyEdit.Location= new Point(IRect.X,IRect.Y);
	MyEdit.Width=IRect.Width+20;
	MyEdit.Height=IRect.Height;
	MyEdit.Text=e.Node.Text;
	tvTestTree.Controls.Add(MyEdit);
	//MyEdit.Show();
}

You will probably have to add an event handler for the TextBox to close it and get the selected text...