C# Discussion Boards - CodeProject

leppie11-Jul-02 10:46

leppie

11-Jul-02 10:46

thx, i wrote the original UI code a while back so i'll check if i maybe did set it to sort.

my workaround is sufficient for now though Smile | :)

READ MSDN

Sub-bitmap from bitmap

Oyvind Bratland11-Jul-02 3:15

Oyvind Bratland

11-Jul-02 3:15

How can I create a Bitmap from a piece of another Bitmap? (I have a 100x100 sized Bitmap and want to create a new bitmap from a 10x10 piece inside the big bitmap)

Ø.

Re: Sub-bitmap from bitmap

James T. Johnson11-Jul-02 19:08

James T. Johnson

11-Jul-02 19:08

Bitmap GetPiece(Bitmap src, Point loc, Size size)
{
  Bitmap bmp = new Bitmap(size.Width, size.Height);
  Rectange rSrc = new Rectangle(loc, size)
  Rectangle rDest = new Rectangle(0, 0, size.Width, size.Height);
 
  using(Graphics g = Graphics.FromBitmap(bmp))
  {
    g.DrawImage(src, rDest, rSrc, GraphicsUnit.Pixel);
  }
 
  return bmp;
}

To get the 10x10 piece located at 7, 4 use this code:
Bitmap bmp = GetPiece(sourceBitmap, new Point(7, 4), new Size(10, 10));

HTH,

James
"Java is free - and worth every penny." - Christian Graus

Re: Sub-bitmap from bitmap

Oyvind Bratland11-Jul-02 21:24

Oyvind Bratland

11-Jul-02 21:24

Thanks, James!
I didn't know you could create a Graphics object from a bitmap and draw on it.

It solved my problem.

Øyvind

TreeView?

Member 1697711-Jul-02 2:39

Member 16977

11-Jul-02 2:39

Hi,All
I want to drag node from one treeview and drop it on another.
I am able to drag it from source tree view,while i drop it on target treeview i want to know on which node of target treeview user has droped the data from source treeview.

DragDrop event of target treeview is like this

private void treeView2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
System.Windows.Forms.TreeNode trn = new System.Windows.Forms.TreeNode();
trn = treeView2.GetNodeAt(e.X,e.Y)??? (co-ord of source treeview)
}

In this event how should i get mouse Co-ordinates where the user has droped the data,so that i can get the node?
Or is there any other way?

Please reply to this..

Thanks
Tushar

Re: TreeView?

Oyvind Bratland11-Jul-02 2:48

Oyvind Bratland

11-Jul-02 2:48

Try

MousePosition.X and MousePosition.Y

-Ø.

Re: TreeView?

Member 1697711-Jul-02 4:21

Member 16977

11-Jul-02 4:21

Hi,

MousePosition.X and MousePosition.Y returns the co-ordinates relative to Screen.
Is there any way to convert them to co-ordiantes related to treeView?

Thanks
Tushar

Re: TreeView?

Eric Gunnerson (msft)11-Jul-02 7:17

Eric Gunnerson (msft)

11-Jul-02 7:17

Try using PointToClient on the treeview.

getting the length of a closed MemoryStream

shaunw11-Jul-02 1:21

shaunw

11-Jul-02 1:21

When the MemoryStream is closed you can still get the data in the stream using GetBuffer - but I cannot get the length of the data in the stream - an exception is thrown saying stream is closed. I know what you are going to say is don't close the stream but I don't have a choice as this stream has been manipuated by the CryptoStream class and to process the last block I have to call Close and that in turn closes my MemoryStream - I can understand not being able to manipulate the position in the stream but not allowing to see the Length when closed seems a bit odd. Can anyone help - I am considering writing my own memory stream type class if I can't work this out.

Re: getting the length of a closed MemoryStream

Nish Nishant11-Jul-02 1:31

Nish Nishant

11-Jul-02 1:31

GetBuffer returns a byte[] which means you can use the Array.Length Property

Nish

p.s. Are you sure you can call GetBuffer on a closed stream? Confused | :confused:

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Re: getting the length of a closed MemoryStream

shaunw11-Jul-02 2:12

shaunw

11-Jul-02 2:12

Alas I wish it was that simple - it tells me that the length of my buffer is 0x100 (256) but I know that the encryped data will only 2 blocks (32 bytes) so that is not a good indication - examining the MemoryStream it tells me that the position and length is 0x20 but I cannot access that data directly

However I think I have it - if I use ToArray() - then I get a buffer that only contains the data and is of the correct length - just a bit convoluted and it still doesn't explain why you cannot get the Length property on a Closed Stream

> p.s. Are you sure you can call GetBuffer on a closed stream

yup - it doesn't throw any exceptions and the data is fine to use later

IIS

Mazdak10-Jul-02 20:53

Mazdak

10-Jul-02 20:53

I want to write a program for IIS with C#.Which class should I use? If I have to use win32 api what are the names of functions related to IIS in win32?

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: IIS

James T. Johnson10-Jul-02 21:17

James T. Johnson

10-Jul-02 21:17

What do you mean by "a program for IIS"? A website, an ISAPI filter, an MMC snap-in, etc?

James
"Java is free - and worth every penny." - Christian Graus

Re: IIS

Mazdak10-Jul-02 22:16

Mazdak

10-Jul-02 22:16

I want to write a application for administrating user accounts.Does "active directory" programming useful for it? I THINK System.DirectoryServices namespace is what I want.

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: IIS

Richard Deeming10-Jul-02 23:43

Richard Deeming

10-Jul-02 23:43

If your users are in Active Directory (NT user accounts), then System.DirectoryServices is the right place to start, using either the WinNT or LDAP providers. MSDN has some good documentation, or check out http://www.15seconds.com/focus/ADSI.htm.

Re: IIS

Mazdak11-Jul-02 5:20

Mazdak

11-Jul-02 5:20

Thank you Richard.What about IIS setting?

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: IIS

Richard Deeming11-Jul-02 5:43

Richard Deeming

11-Jul-02 5:43

The simplest method:

In IIS, properties of the application root, turn off anonymous access, and turn on basic or integrated authentication;
Enable impersonation in web.config;
Log in as a user with permissions to access / modify Active Directory objects, e.g. administrator;

If you want to get more complicated, you can pass login credentials to the DirectoryEntry object, but this could expose the directory to anonymous users.

Web Services and arrays in response

koenig10-Jul-02 12:12

koenig

10-Jul-02 12:12

I created a Web Service with an only method...

[WebMethod]
public string[] Test1()
{
string[] tStrings = new string[2];
tStrings[0]="first";
tStrings[1]="second";
return tStrings;
}

After deploying it I attempted to test my method with SoapLite (module for Perl). I worked with SoapLite before and never had troubles.

Using my operational experience with SoapLite I started client, but... inplace of an XML - Response I espected to receive after calling my method, I saw an only string - "HASH(0x84fca1c)".
Pls, help me, I can't see where is my mistake... Frown | :(

DMT Labs, Intelifarm group.
Ilyin Nikolay (aka Koenig).

COM Activation

Steve Severance10-Jul-02 10:53

Steve Severance

10-Jul-02 10:53

If I have a COM+ Component(EnterpriseServices). If I have the activation set as server and I instantiate it in 2 places do they both get the same instance? And if not is there a way around this? Thanks.

Steve

Not all who wander are lost...

Re: COM Activation

ThaRudeDude11-Jul-02 9:09

ThaRudeDude

11-Jul-02 9:09

You have two options for server-activated objects: Singleton and SingleCall.
In the case of Singleton, the remoting will only create one instance and every client-call will be routed to the same instance.
In case of SingleCall, every client-call will be served by a completely new instance of your server object.

Rude Blush | :O

DirectX and mp3

sasdav10-Jul-02 10:12

sasdav

10-Jul-02 10:12

Is there any way to play .mp3 files using DirectX and C#? I've gotten it working with the Windows Media Player, sort of, but WMP is WAY to buggy to be reliable. For instance, some of my .mp3 files will play in WMP but others (made on the same day and in the same way) will not. However, all of my .mp3's play fine in MusicMatch, WinAmp and using the JMF, so the problem seems to be with Windows Media Player.
Anyway, I've added a reference for DirectX to my project but I have no clue what class to use to load and play the .mp3 file.

Thanks

Re: DirectX and mp3

leppie10-Jul-02 20:26

leppie

10-Jul-02 20:26

I saw a nice piece of source at gotdotnet.com (look at bottom of page). The program is a small game called Deviate, you mite find what you are looking for here.

Hope this helps

READ MSDN

Re: DirectX and mp3

sasdav11-Jul-02 4:29

sasdav

11-Jul-02 4:29

Well, that works fine for .wav files, but with .mp3's it just blows up. Is it possible that DirectX doesn't support mp3?

How to change the desktopwallpaper

Mario1234510-Jul-02 9:48

Mario12345

10-Jul-02 9:48

Hello!

How can I change my Windows Desktopwallpaper in C#? I need to see the result at once, so an refresh or so could also be nessesary, I don't know

Thanx for any help

Mario

Re: How to change the desktopwallpaper

Chris Rickard10-Jul-02 12:42

Chris Rickard

10-Jul-02 12:42

Use the Registry class to modify HKEY_CURRENT_USER\Control Panel\Desktop\WallPaper

OR

Use the Windows API function SystemParametersInfo(). You'll have to DllImport it from user32 and lookup the constants in winuser.h

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