Re: Trace output to command window. - C# Discussion Boards

29-Jan-09 11:22

Hello all,

how to configure trace listener to output trace statements to command window?

Thanks.

Wendelius29-Jan-09 11:28

29-Jan-09 11:28

You have a custom listener in console application? If that's the case, just use Console.WriteLine.

The need to optimize rises from a bad design.My articles[^]

Member 232448329-Jan-09 11:33

29-Jan-09 11:33

its a windows application project where i want to configure tracelistener to output trace statements to command window. I have already sprinkled trace.writeline statement all over project and configured TextTraceListener, which outputs trace statements to text file.

Wendelius29-Jan-09 11:39

29-Jan-09 11:39

As far as I know there's no 'native' support for that in framework, so I guess you should
- create a console application
- start a new process for that application
- use IPC to receive data from you trace listener
- write it to console

The need to optimize rises from a bad design.My articles[^]

Member 232448329-Jan-09 13:01

29-Jan-09 13:01

Hi Mika,

So, you mean:

1. If i configured Text trace listener to log statements to file say "TraceFile" under c:
2. The console application should watch that file ("TraceFile").
3. And if there are any changes to that File , get it and write it to console. (your way is IPC but i am thinking of FileWatcher control)

am i on right track?

Thanks.

Wendelius29-Jan-09 13:11

29-Jan-09 13:11

Yes, you can do it that way also. When the file changes, you just have to know what lines are already written to console and write the new ones. Hopefully the FileSystemWatcher doesn't miss modifications if you're reading the file and it's modified at the same time. Also make sure that you don't lock the file while reading so that the listener is unable to write to it.

The need to optimize rises from a bad design.My articles[^]

Member 232448329-Jan-09 14:18

29-Jan-09 14:18

sure. thanks.

N a v a n e e t h29-Jan-09 15:52

N a v a n e e t h

29-Jan-09 15:52

Member 2324483 wrote:
am i on right track?

I don't think so. If you need the trace statements displayed in the command window, why to write it to a file and watch it? TextWriterTraceListener class has a constructor overload which takes TextWriter type. To output the trace to command window, follow the below steps.

1 - Goto project properties and change your project type to console application. This will start a command window with your form.

2 - Add the following code in the main.

static void Main() {
    // rest of the code
    TextWriterTraceListener listener = new TextWriterTraceListener(Console.Out);
    Trace.Listeners.Add(listener);
    Application.Run(new YourStartupForm());
}

You can see the Trace.WriteLine is writting to the command window.

Navaneeth

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Member 23244832-Feb-09 7:58

2-Feb-09 7:58

Actually, i don't want to change my project type to console application. Its a product and i want to show trace output in separate window when it is enabled.

File Acess

ziwez029-Jan-09 10:57

ziwez0

29-Jan-09 10:57

Hey,

im currently developing an application, one of the features of the app is that it creates
pdf files, but i want the files to be saved in a sub directory of where the application is
installed, but how do i code that?

thanks

Re: File Acess

Wendelius29-Jan-09 11:04

Marshalling complex structures

29-Jan-09 11:04

You can use System.Reflection.Assembly.GetExecutingAssembly().Location. Just remove the application name part to get the directory portion and then add the subfolder you need.

The need to optimize rises from a bad design.My articles[^]

faehne29-Jan-09 10:46

faehne

29-Jan-09 10:46

Hallo - i hope somebody can help me....

i want to call a c-function with this code:

struct StrBox
{
 char str[30];
};

struct StructBox
{
 StrBox * box;
};

DLLIMPORT char * TestStrBox(StructBox *sb);

i used this c#-code to call it:

	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
	struct StrBox
	{
		[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 30)]
		public string str;
	};
	
	[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
	struct StructBox
	{
		[MarshalAs(UnmanagedType.LPStruct)]
		public StrBox box;
	};
...
		StructBox b = new StructBox();
		b.box.str = "Hallo Welt!!!";
		string str = TestStrBox(b);

but if execute it, i get:

Ausnahme System.TypeLoadException wurde im ausgeführten Programm ausgelöst:
Cannot marshal field 'box' of type 'marshal.StructBox': Invalid managed/unmanaged type combination (this value type must be paired with Struct).

So i think it have a problem, with the struct in the struct... but the struct HAVE to be in the struct
(this is just a test, who reflects a real issue).

Hope... somebody have an idea.
Sooo. Many thx in advance

Re: Marshalling complex structures

Luc Pattyn29-Jan-09 14:55

Luc Pattyn

29-Jan-09 14:55

Hi,

your C# code has a struct in a struct, your C++ code has a struct pointer in a struct.

Smile | :)

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Re: Marshalling complex structures

faehne29-Jan-09 15:01

faehne

29-Jan-09 15:01

Aahhh... ok!!

But how can i declare it in c#, that it is handled like a Pointer to a struct (is IntPtr the right way?)

Re: Marshalling complex structures [modified]

Luc Pattyn29-Jan-09 15:28

Luc Pattyn

29-Jan-09 15:28

Hi,

if the only thing you want to happen is passing a pointer, then IntPtr is the right type.
but that will not marshal the object pointed to, since IntPtr does not carry type information for you. You will have to explicitly marshal using Marshal.PtrToStructure() somehow.

I always try and avoid those complex marshal jobs. When both sides are mine, passing data is
implemented for minimal complexity, that's the only way I know to avoid everything getting copied
across the managed/unmanaged border.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

modified on Friday, June 10, 2011 11:55 AM

Restarting a form

Lodeclaw29-Jan-09 10:32

Lodeclaw

29-Jan-09 10:32

Hello folks.

I have a quick question, so here it is: can I restart a form back to it's original state as if it was newly opened without referencing a parent form or closing it? If so, how?

Thanks dudes and dudettes!

Wendelius29-Jan-09 10:40

29-Jan-09 10:40

Never tried it, but perhaps if you:
- set this.components = null
- remove all controls from this.Controls
- call InitializeComponent

The need to optimize rises from a bad design.My articles[^]

Lodeclaw29-Jan-09 10:54

Lodeclaw

29-Jan-09 10:54

Holy crockpot!

It works:

components = null;
Controls.Clear();
InitializeComponent();

Are you some kind of suprogrammer?

Thanks, Mika!

Wendelius29-Jan-09 11:05

29-Jan-09 11:05

Lodeclaw wrote:
Are you some kind of suprogrammer

Now I have to ask a stupid question: What's a subprogrammer?

Lodeclaw wrote:
Thanks, Mika

You're welcome Smile | :)

The need to optimize rises from a bad design.My articles[^]

Lodeclaw29-Jan-09 11:08

Lodeclaw

29-Jan-09 11:08

Not subprogrammer. Don't make me explain my terrible pun.

Wendelius29-Jan-09 11:15