C# Discussion Boards - CodeProject

Vikram A Punathambekar26-Nov-05 0:09

26-Nov-05 0:09

I googled a bit and tried using ; and | as separators, but they don't work. In fact, using | as a filter separator throws an exception. I suppose the best bet is to call the method multiple times and club the results together.

Kluch wrote:
Also it seems to just return them in alphabetical order, is there anyway to return them in the way they are sorted/being viewed in Explorer?

Are you saying that if the contents of folder Foo appear sorted by name in Explorer, your app should offer them sorted by name; and if the contents of folder Foo appear sorted by date created in Explorer, your app should offer them sorted by date created? AFAIK, there's no way to do this.

Cheers,
Vikram.

http://www.geocities.com/vpunathambekar

Google talk: binarybandit

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

problem with forms

Sam 200625-Nov-05 13:55

Sam 2006

25-Nov-05 13:55

ive got a problem, and i dont understand why it happens. when a function is called, it is suppoed to open a new form:

namespace.cmdfeedback feedbackform = new namespace.cmdfeedback();
                    feedbackform.OtherForm = this;
                    feedbackform.ShowDialog();

but the form isnt displayed. however, if i add a messagebox.show(""); to the new form, the form gets displayed (as well as the messagebox). how can i get the form to display without the messagebox? i have no clue wat is causing this. here is the code for the form that should be shown.

public cmdfeedback()
        {
            InitializeComponent();
        }

        private void cmdfeedback_Load(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            this.Show();
            //form is displayed only if this is uncommented??
            //MessageBox.Show("");
            OtherForm.statusbox.AppendText(Environment.NewLine + "Data recieved from client.");
            try
            {
                richTextBox1.Text = "something";
            }
            catch (someexception)
            {
                richTextBox1.Text = "Error recieving data.";
            }
        }

-- modified at 19:57 Friday 25th November, 2005

Re: problem with forms

Vikram A Punathambekar26-Nov-05 0:15

Vikram A Punathambekar

26-Nov-05 0:15

This is a shot in the dark, but can you try feedbackform.Focus() ?

Cheers,
Vikram.

"When I read in books about a "base class", I figured this was the class that was at the bottom of the inheritence tree. It's the "base", right? Like the base of a pyramid." - Marc Clifton.

Re: problem with forms

Dave Kreskowiak26-Nov-05 8:05

Dave Kreskowiak

26-Nov-05 8:05

Well, this happens because the form, normally, won't show itself until the Load event is completed.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Windows Form freezes while code is running

redbrad025-Nov-05 13:26

redbrad0

25-Nov-05 13:26

I have a program that has a form1.cs which calls and starts each thread in the workerthreaded.cs file. While the program is running it fully freezes until it stops. How can you make this so it always runs and the interface can still be used while the code is still running?

Re: Windows Form freezes while code is running

ventomito26-Nov-05 5:47

ventomito

26-Nov-05 5:47

the code is:

<br />
Application.DoEvents();<br />

You can write it before the thread starts...

I hope it helps

Enrico

Re: Windows Form freezes while code is running

redbrad026-Nov-05 7:01

redbrad0

26-Nov-05 7:01

Thanks it worked perfect

Word Interface - save new file after a compare?

nofacts25-Nov-05 12:50

nofacts

25-Nov-05 12:50

I have opened a Word Document and done a compare to another document, setting WdCompareTarget to New. Where I am stuck is saving the new document without user interaction.
Here is the code that compares the documents:

WordDoc1.Activate();
WordDoc1.TrackRevisions = true;
WordDoc1.ShowRevisions = true;
WordDoc1.PrintRevisions = true;
object CompareTarget = Word.WdCompareTarget.wdCompareTargetNew;
WordDoc1.Compare(
  secondfile,
  ref missing,
  ref CompareTarget,
  ref missing,
  ref missing,
  ref missing,
  ref missing,
  ref missing
  );

If I do:

object SaveChanges = true;
WordApp.Documents.Close(
  ref SaveChanges,
  ref missing,
  ref missing
  );

then the Word Close box comes up and I can specify a name, but I'd like to save to a file specified in a variable. How do I get a reference to the new document?

Thanks ...

Re: Word Interface - save new file after a compare?

theFrenchHornet14-Dec-05 16:29

theFrenchHornet

14-Dec-05 16:29

Word.ApplicationClass WordApp;
WordApp = new Word.ApplicationClass();
Word.Document WordDoc2;

Then, after the compare:

WordDoc2 = WordApp.ActiveDocument;

Plotting with drawLines

bwagz25-Nov-05 12:32

bwagz

25-Nov-05 12:32

The program I'm creating allows a user to scroll through a waveform consisting of 10,000+ data points. As the user scrolls through the waveform, a magnified portion of it is displayed on another area of the screen. The magnified portion can plot anywhere from 0 to the entire length of the waveform's points.

Right now I'm having a major refresh slow down when the number of data points for the magnified portion is too large. To plot all of the points I'm using the Graphics.DrawLines() method. To help the performance I also added a Timer (50ms) to limit the number of Invalidate()'s when the user is scrolling, which helps a little bit.

I tried drawing the magnified portion with an offscreen memory bitmap, but it didn't really me.

Can direct draw help me with this in any way?

Re: Plotting with drawLines

Dave Kreskowiak26-Nov-05 7:57

Dave Kreskowiak

26-Nov-05 7:57

Well, you can only plot as many points as the width of your display window for this graph, which is what? 1024 points at most? If you show all 10,000 points, your overdrawing the same column of pixels 10 times before moving to the next one. Figure out how wide your client window is, this will be the number of datapoints you can show. Then do a little math to figure out how many datapoints to skip between adjacent pixels. For example, you'll only look at every 25th datapoint when plotting your graph.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Plotting with drawLines

bwagz26-Nov-05 10:11

bwagz

26-Nov-05 10:11

The magnified portion is plotting a lissajous signal, so the display width isn't a factor. I thought about "skipping" datapoints, but wouldn't that misinterpret the data being displayed?

Thanks for the reply

windows messaging

Roy K25-Nov-05 12:16

Roy K

25-Nov-05 12:16

I am writing two programs, one in c++ and one in c#. These programs are using windows messaging to talk to each other. In the c++ program, I used this line of code to register the message to send...

UINT MSG_TAKEPICTURE = RegisterWindowMessage("CMD_TAKEPICTURE");

In the c# program I also needed to register the message. I did that with this line of code...

private const int CMD_TAKEPICTURE = 49855;

I got the number from stepping through the c++ code to find what number MSG_TAKEPICTURE was being assigned with. The message transfers worked fine. But when I rebooted the computer, this number changed. Is there a wildcard variable that I need to put in place of the number in the c# code?

Thanks,
Roy K

Re: windows messaging

Curtis Schlak.25-Nov-05 13:41

Curtis Schlak.

25-Nov-05 13:41

From the documentation:

The RegisterWindowMessage function defines a new window message that is guaranteed to be unique throughout the system.

So, we're guaranteed a unique UINT, just not the same UINT.

Here's what you can do. In your C# source, include the following code in the appropriate places:

// Somewhere in your class.
[DllImport( "user32.dll", SetLastError=true, CharSet=CharSet.Auto )]
static extern uint RegisterWindowMessage( string lpString );

// Somewhere in your initialization:
CMD_TAKEPICTURE = RegisterWindowMessage( "CMD_TAKEPICTURE" );

Now, your C# and C++ code will have the same value associated with the message name.

"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty

-- modified at 19:42 Friday 25th November, 2005

Re: windows messaging

Roy K25-Nov-05 16:43

Roy K

25-Nov-05 16:43

Prefect, worked like a charm. This is the second time I have used these boards for a problem that I have had, and the second time a solution surfaced. Many thanks for the fast reply.

Roy K

Re: windows messaging

Curtis Schlak.26-Nov-05 7:11

Curtis Schlak.

26-Nov-05 7:11

Glad to hear that. Happy coding.

"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty

Anyone with UserComponents experience

rahulmballal25-Nov-05 12:08

rahulmballal

25-Nov-05 12:08

I am currently working on a digramming tool. I have used picture box as the container and have made a control called as the BoxControl...now i wish to make a control that can join teo box control by a line as we do it in Visio..I am drawing a diagram below to elucidate the problem

|||||||||| |||||||||
|BoxCtrl |==========|BoxCtrl| The link shown between the two blocks is what ia m looking 4
|||||||||| |||||||||

It would be great if someone could send a samplecode__otherwise the logic is fine.

Thanks in advance

RaHuL

C# and SQL Express Primer

budidharma25-Nov-05 11:27

budidharma

25-Nov-05 11:27

I'm looking for a tutorial/primer that will explain the very basics of using Visual Studio, C#, and SQL Express to build applications. I've not worked with databases and c# before - so I'm new to this.

Anyone know of a good place to find this information?
I've been looking, but haven't found anything good. Thanks.

Re: C# and SQL Express Primer

budidharma25-Nov-05 11:28

budidharma

25-Nov-05 11:28

Let me rephrase that. I work constantly with C#, and I've worked with SQL databases, just not both together. I have a very simple understanding of ADO.NET. I'm most interested in finding out the correct way to use "data sources" via the VS IDE's interface as connections to databases.

I hope that makes sense. Thanks again.

Calls to OnPaint() - WinForms - VS 2005

mladen197425-Nov-05 10:44

mladen1974

25-Nov-05 10:44

Hi,

I was wondering.......why so many calls are made to OnPaint method of the Form when ClientRectangle of the button needs to be invalidated. Confused | :confused:

I was testing some of the vs2005 features and i run a simple test which involved label, button and a call to OnPaint method.
This was done on XP Pro system.

The result was that each time the buttons ClientRectangle needs to be invalidated the Forms OnPaint method gets called. - just moving the mouse, on and off the button would call the Forms OnPaint method.
This happened only when button's style was set to Standard or System, otherwise everything works as expected.
(I used "label.text" to display #of calls to OnPaint( ) )

I've tried other standard vs2005 controls and this intensive (strange) calling of Forms OnPaint( ) manifested itself only with the button.

What am i missing here? Should this be happening?
Seems like a waste of resources.......

-- modified at 16:51 Friday 25th November, 2005

new desktop

Sam 200625-Nov-05 9:58

Sam 2006

25-Nov-05 9:58

is there a way i can 'create a new desktop and switch to it' like in the 'winlock' program at http://www.codeproject.com/win32/AntonioWinLock.asp - i dont want to use a dll. is there anything in c# that can do this?

thanks,
sam kline

Re: new desktop

Dave Kreskowiak25-Nov-05 10:29

Dave Kreskowiak

25-Nov-05 10:29

C# is just a language. It, and others, like VB or C++, don't have anything that can do any of this. On the other hand, they all have the ability to call the Win32 Library functions needed to pull this off. All you have to do is call (P/Invoke in the .NET world) the necessary functions just like described in the article. If you want more detail, you'll have to dig into his .DLL code to see how it's done, then rewrite that code in C#.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

SqlDataAdapter and Data designers in VS8

Fernando A. Gomez F.25-Nov-05 9:26

Fernando A. Gomez F.

25-Nov-05 9:26

Hello all.

When I developed apps in C# with Visual Studio 7, and if I wanted to create a connection to a table within a form, I simply used to drag such table from the "Server explorer" window into my form. It created then a SqlConnection and a SqlDataAdapter objects and life was easier.

Now I'm working with Visual Studio 8, and it won't let me drag a table from the "server explorer" window. Does this mean that I will have to code myself the SqlDataAdapters? Is there any possible way of doing what I used to do with VS7? Why Microsoft changed such a good feature?

Thanks a lot,
KK.

One day you'll find
that I have gone,
for tomorrow may rain, so
I'll follow the sun...

Qu About Username and Password Encryption in C#.Net

Reeturaja25-Nov-05 6:35

Reeturaja

25-Nov-05 6:35

Hello:

Anyone knows how to encrypt a username and password in C#.Net ?

Thanks and appreciate it

How to Encrypting Username and Password in C#

Reeturaja25-Nov-05 6:35

Reeturaja

25-Nov-05 6:35

Hello,

How can I encrypt a username and password in C#.net ?

Thanks

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