Re: namespace - automatically created, now not recognized - C# Discussion Boards

Re: OUTLFLTR.DLL library - need an answer

Covean3-Mar-10 3:02

3-Mar-10 3:02

Both app and dll must be the same (32 or 64 bit) there is no other way (or maybe I should say I don't know a better way Laugh | :laugh:

).

But even if you develop on a 64 bit os you can compile your app as x86 and everything should be fine.

Greetings
Covean

Re: OUTLFLTR.DLL library - need an answer

chiky_ancutza3-Mar-10 5:35

chiky_ancutza

3-Mar-10 5:35

I rebuild the app on 32bit, but now i am receiving "unable to find an entry point named 'ms_md5' in DLL".
I locate the DLL in my \\x86\Debug.

I take dependency walker...to see what functions are in this .dll but i wasn't able to find it.
I found only MD5Init,MD5Update,MD5FInal, but MD5INIT has a parameter type = MD5_CTX.
I can use these functions, but i don;t know how to use MD5_CTX parameter.

Thanks,
Anca

Re: OUTLFLTR.DLL library - need an answer

Covean4-Mar-10 0:05

Covean

4-Mar-10 0:05

Maybe this helps:

[StructLayout(LayoutKind.Sequential)]
public struct MD5_CTX
{
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 2, ArraySubType = System.Runtime.InteropServices.UnmanagedType.U4)]
    public uint[] i;
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 4, ArraySubType = System.Runtime.InteropServices.UnmanagedType.U4)]
    public uint[] buf;
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 64)]
    public byte[] in;
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst = 16)]
    public byte[] digest;
}
[DllImport("outlfltr.dll")]
public static extern void MD5Init(ref MD5_CTX context);
[DllImport("outlfltr.dll")]
public static extern void MD5Update(ref MD5_CTX context, Byte[] input, Int32 inlen);
[DllImport("outlfltr.dll")]
public static extern void MD5Final(ref MD5_CTX context);

Greetings
Covean

QuickTime Audio peak detection

survcopt2-Mar-10 4:57

survcopt

2-Mar-10 4:57

Hi,
Actually I've done a video player with the last quicktime SDK , and I would like to detect peak in the audio stream.
This peak will serve to synchronise the video stream with a database.
Thanks

namespace - automatically created, now not recognized

lukeer2-Mar-10 4:44

lukeer

2-Mar-10 4:44

Hi Experts,

I created a program in Visual Studio 2008 Standard. I left the namespace with standard MyProgram. I created some classes like this one

namespace MyProgram
{
    /// <summary>
    /// A Class
    /// </summary>
    public class MyDerivedPanel:Panel
    {
        // Some content
    }
}

Die werden dann in Form1.Designer.cs behandelt

namespace MyProgram
{
    partial class Form1
    {
        // ...
        private void InitializeComponent()
        {
            // Now we are coming to the error
            this.myDerivedPanel1 = new MyProgram.MyDerivedPanel();
        }

     private MyDerivedPanel myDerivedPanel1;
}

At the mentioned line, Visual Studio claims to have found an error at compile time:
<quote>Error 7 The type "MyDerivedPanel" does not exist in type "MyProgram.MyProgram"
(vaguely translated from german version)
I can delete the namespace including its "." from the erroring line and all works fine. But Visual Studio Designer re-inserts the namespace every time I change something in the Designer.
Having more than one class with this problem, deleting those namespaces gets annoying.

Is that a known issue?
Is there a known solution?

Ciao,

luker

Re: namespace - automatically created, now not recognized

Dan Mos2-Mar-10 5:27

Dan Mos

2-Mar-10 5:27

I tried to reproduce the problem but it works flawlesly. Confused | :confused:

Re: namespace - automatically created, now not recognized

Luc Pattyn2-Mar-10 5:35

Luc Pattyn

2-Mar-10 5:35

lukeer wrote:
Visual Studio claims to have found an error

VS never claims; it did find an error. Laugh | :laugh:

FYI: when a file contains errors, it does not compile, and the types it defines, are not available to the compiler when trying to deal with remainder of the application, so the compilation of other files may suffer from that as well. I assume you currently have multiple errors. Then first fix the errors in the lowest-level files, the ones holding minor classes needed by many but not needing much themselves, then work you way up.
Extra suggestion: if that fails, temporarily disable large chunks of code WITHIN classes (not entire classes though); you can use #if false and #endif for that purpose.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Re: namespace - automatically created, now not recognized

Som Shekhar2-Mar-10 7:46

Som Shekhar

2-Mar-10 7:46

I Second what Luc says.

However, I would like to suggest looking at more errors. I believe that there must be more than one errors in case the files are not compiled.

Also, are these two files in the same project? (I know it is too basic a question. But better to confirm).

Re: namespace - automatically created, now not recognized

Paulo Zemek2-Mar-10 10:05

Paulo Zemek

2-Mar-10 10:05

Isn't there a class named MyProgram?

If I understood what's happenning, it's something like this:
The Designer will always re-generate code (you change something in the form, it's code is regenerated enterelly).

But, to "avoid" problems, the full namespace is used. Here is the problem, it uses the full namespace, but does not add the global::

So, as you are inside MyProgram namespace, when it puts the "MyProgram." it finds a class with such name, and use it.

I really think that's the problem. To solve this, change the name of your class. I am not 100% sure that you have such class, but that's the only way I can reproduce the error.

Re: namespace - automatically created, now not recognized

lukeer2-Mar-10 20:37

lukeer

2-Mar-10 20:37

Paulo Zemek wrote:
Isn't there a class named MyProgram?

As far as I can tell, there is.

It's a class dealing with resources for multi-language-support. I don't remember if it was automatically generated with the name of "MyProgram.MyProgram", but I think that was necessary for some automated feature to find the files

- MyProgram.resx,
- MyProgram.en-US.resx and
- MyProgram.de-DE.resx.

Can I rename the class without breaking the multi-language-support?
How do I find the class?

Ciao,

luker

Re: namespace - automatically created, now not recognized

Paulo Zemek3-Mar-10 1:21

Paulo Zemek

3-Mar-10 1:21

In the line where the error with the MyProgram appears.
Right click in the word MyProgram and use the Go to definition function of the menu.

But I don't know how that was made... when I add multi-language support the name of the resource file is not really important, but if you have hand-written the name of the resource in strings you will need to find and replace them.

Another choice is to rename the namespace.

Re: namespace - automatically created, now not recognized

lukeer3-Mar-10 20:45

lukeer

3-Mar-10 20:45

Paulo Zemek wrote:
use the Go to definition function.
Another choice is to rename the namespace.

I tried both ways and they both fail because the resource class is generated automatically every time I change a resource.
I can change the name of the class and the change gets undone as soon as I change a resource.
I can change the namespace and the resource class changes its name accordingly as soon as I change a resource.

It seems like I have to move all of my self-created classes out of the application's standard namespace to avoid the conflict.

Any concerns about that?
Or does anyone have another solution?

Ciao,

luker

How do you check the validity of a file type?

sunlord_clave2-Mar-10 3:50

sunlord_clave

2-Mar-10 3:50

How do you check if, for example, an xls file really contains a spreadsheet? If an image called test.jpg is renamed to test.xls, how could I, in C#, figure out that text.xls is actually an image?

Re: How do you check the validity of a file type?

PIEBALDconsult2-Mar-10 3:57

PIEBALDconsult

2-Mar-10 3:57

Try opening it in the target application. Big Grin | :-D

I wouldn't bother trying to guess.

Re: How do you check the validity of a file type?

Dave Kreskowiak2-Mar-10 3:57

Dave Kreskowiak

2-Mar-10 3:57

Try and load it using the appropriate library built to parse that kind of file.

Other than that, you have to examine each and every byte yourself, parsing the file yourself, and validating all the data yourself. For every kind of file format, that's an enormous amount of work.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: How do you check the validity of a file type?

dan!sh 2-Mar-10 4:11

dan!sh

2-Mar-10 4:11

If your application is meant to handle almost any kind of file, then you have a tough job. Every file essentially is a series of bytes. Unless you scan that and then try to match it with actual pattern, I can't think of a concrete solution.

You can try opening the file with the associated program. That too will not guarantee detection since many file will open (although distorted and with weird characters) in the associated program.

I found this[^] through google. You can check if it helps.

web cam with sound recording to avi [modified]

sanforjackass2-Mar-10 2:09

sanforjackass

2-Mar-10 2:09

i search a lot for program in c# that can record from web cam
can any one help!
Sorry and thanks
every time i search more harder in this web i found what i want so if any one wants to know the solution it is DirectShow.NET
for the Administrator you told me not to put the Q and A in the same Message so if you wants to remove it, it is your job.
thank you codeproject

modified on Tuesday, March 2, 2010 9:02 AM

Re: web cam with sound recording to avi

Dave Kreskowiak2-Mar-10 3:55

Dave Kreskowiak

2-Mar-10 3:55

Your post doesn't make much sense at all, so, point-by-piont:

sanforjackass wrote:
i search a lot for program in c# that can record from web cam

C# and the .NET Framework has no managed classes to do this. You must use an outside library.

sanforjackass wrote:
every time i search more harder in this web i found what i want so if any one wants to know the solution it is DirectShow.NET

Yeah. And?

sanforjackass wrote:
for the Administrator you told me not to put the Q and A in the same Message so if you wants to remove it, it is your job.

What are you talking about?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Optional parameter declaration in C3 3.5

abcurl2-Mar-10 1:50

abcurl

2-Mar-10 1:50

Is there any way to do optional variable declaration in c# 3.5.
I have two alternatives.
(a) Function Overloading
(b) declaring the function arguments in Params Object[] variable

Can i do it exactly the way we can do in vb.net ?

Re: Optional parameter declaration in C3 3.5

Not Active2-Mar-10 1:55

Not Active

2-Mar-10 1:55

C# 4.0 introduces optional parameters, you can't do it in 3.5.

abcurl wrote:
Can i do it exactly the way we can do in vb.net ?

Why would you ever compare anything to VB? Dead | X|

I know the language. I've read a book. - _Madmatt

Re: Optional parameter declaration in C3 3.5

Kevin McFarlane2-Mar-10 2:05

Kevin McFarlane

2-Mar-10 2:05

Mark Nischalke wrote:
Why would you ever compare anything to VB?

OK, well you can do optional parameters in C++. Would that have been a better comparison? Poke tongue | ;-P

Kevin

Re: Optional parameter declaration in C3 3.5

Not Active2-Mar-10 2:16

Not Active

2-Mar-10 2:16

Yes, VB and C++ are much closer. Laugh | :laugh:

I know the language. I've read a book. - _Madmatt

Re: Optional parameter declaration in C3 3.5

Keith Barrow2-Mar-10 2:27

Keith Barrow

2-Mar-10 2:27

VB can compared to many things, normally prefixed with "A big steaming pile of....." Smile | :)

Dalek Dave: There are many words that some find offensive, Homosexuality, Alcoholism, Religion, Visual Basic, Manchester United, Butter.

Shameless self-promotion

Keith Barrow2-Mar-10 2:26

Keith Barrow

2-Mar-10 2:26

Here is how to do it in 4.0:

Named and Optional Arguments[^]

Told you: shameless Smile | :)

Dalek Dave: There are many words that some find offensive, Homosexuality, Alcoholism, Religion, Visual Basic, Manchester United, Butter.

Re: Optional parameter declaration in C3 3.5

Abhinav S2-Mar-10 3:28

Abhinav S

2-Mar-10 3:28

Mark Nischalke wrote:
C# 4.0 introduces optional parameters, you can't do it in 3.5.

Back to the future......

Me, I'm dishonest. And a dishonest man you can always trust to be dishonest.
Honestly. It's the honest ones you want to watch out for...

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