Displaying an xml file on the Command Prompt - C# Discussion Boards

Call C# DLL from unmanaged C++: question on string

Koushik Biswas2-Mar-06 10:05

2-Mar-06 10:05

I have written a C# DLL that I intend to call from an unmanaged C++ app. I have so far followed all the rules that Microsoft explains in this article: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vcwlkcominteroppart2cservertutorial.asp[^]. My ultimate goal is to have a method in the C# DLL which will populate a string OUT parameter, and call it from C++. Something like void GetErrorString( int iErrorCode, ref string szErrorString ). Now do not take that signature seriously - because that is what the question is! What should be the signature???? And how exactly do I call it from C++?

So far I have tried:

Attempt 1.
C# signature:
void Func2( int iCode, ref char [] szOut );
C++ call:

char szRetString[ 128 ];<br />
cpi->Func2( 10, &szRetString );

Result: Runtime error
Variation: Instead of "&szRetString" in C++, tried "szRetString". Same result.
Variation: Instead of "ref" in C#, tried without ref. Same result.

Attempt 2.
C# signature:
void Func2( int iCode, ref string szOut );
C++ call:

char szRetString[ 128 ];<br />
cpi->Func2( 10, &szRetString );

Result: Runtime error
Variation: Instead of "&szRetString" in C++, tried "szRetString". Same result.
Variation: Instead of "ref" in C#, tried without ref. Same result.

Attempt 3.
C# signature:
void Func2( int iCode, ref StringBuilder szOut );
C++ call:

char szRetString[ 128 ];<br />
cpi->Func2( 10, &szRetString );

Result: Runtime error
Variation: Instead of "&szRetString" in C++, tried "szRetString". Same result.
Variation: Instead of "ref" in C#, tried without ref. Same result.

And all the cross-variations of the above combinations as well!!!!

Can somebody please tell me where am I going wrong? My C++ project does not have UNICODE defined. But please note that I have succeeded in calling the example provided by the MSDN article (link above) - which means I am successful in sending a read - only copy of string as IN parameter into C#.

Ever wondered that microsoft examples avoid the harder part?;)

Koushik Biswas

-- modified at 16:06 Thursday 2nd March, 2006

Regex and Replace

eggsovereasy2-Mar-06 9:39

eggsovereasy

2-Mar-06 9:39

Ok so I have this method:

<br />
public static string ConvertFileName(string fn)<br />
    {<br />
        Regex.Replace(fn, "[^\\w\\s\\.\\{}_\\-\\$&\\^!;#\\+=%]", "_");<br />
<br />
        if (fn.Length > 31)<br />
            fn = fn.Substring(0, 28) + ".doc";<br />
<br />
        return fn;<br />
    }<br />

It is supposed to take the string fn and replace any characters that do not match the regex given with underscores. For example the file name: "Horses (Big Ones).doc" should be made into "Horses _Big Ones_.doc". However, it changes nothing right now. Any suggestions what the issue is here. Ran it through a regex tester at http://www.fileformat.info/tool/regex.htm it ran fine there.

Thanks

-- modified at 15:40 Thursday 2nd March, 2006

Re: Regex and Replace

Guffa2-Mar-06 9:44

Guffa

2-Mar-06 9:44

That is because you do the replacement and throw away the result. The Replace method returns a string, you have to take care of the return value.

---
b { font-weight: normal; }

Re: Regex and Replace

eggsovereasy2-Mar-06 9:50

eggsovereasy

2-Mar-06 9:50

Wow... I'm going to uninstall VS, give my computer to charity, and become a monk now. I feel like an idiot. Thank you for the quick and correct response Smile | :)

Re: Regex and Replace

Nadia Monalisa2-Mar-06 10:04

Nadia Monalisa

2-Mar-06 10:04

I could not help stopping expressing my satisfaction on the software "RegexBuddy" for Generating Regex Snippets. This software will take description from you and generate Right Regex Snippet for you.
http://www.regexbuddy.com/

Re: Regex and Replace

Paul Conrad2-Mar-06 18:51

Paul Conrad

2-Mar-06 18:51

http://www.regexbuddy.com/[^]

extracting values of meta tags in html

rizwan_rashid2-Mar-06 9:19

rizwan_rashid

2-Mar-06 9:19

anyone know about how to extract attribute's values from meta tags in html using regular expression or dom??

Displaying an xml file on the Command Prompt

Rajareet2-Mar-06 9:01

Rajareet

2-Mar-06 9:01

Hi,
I have written code to dispay an xml file on the command prompt, but wierdly, I am getting system.setting[] as the output instead of the xml file..I have entered in parameters such as /xml and a path.

Here is my code..

Can anyone tell me what wrong and why I am getting a difference output ?

using System;
using System.Xml;

namespace EliteDMSUtilities
{
///

/// Summary description for Class1.
///

class EntryPoint
{
///

/// The main entry point for the application.
///

[STAThread]
static void Main(string[] args)
{
//string[] args = new string[10];
//args[0] = "/xml";
//args[1] ="C:\Test\Elite_Dms_SystemSetting.xml";

if( args.Length >0)
{
if(args.GetValue(0).ToString()== "/xml")
{
Execute_Cmd_xml(args);
}
else
{
Console.WriteLine("Unrecognized command");
Console.ReadLine();
}
}

}// end of main
static void Execute_Cmd_xml(string[] args)
{
Console.WriteLine(args.ToString());
string sIFolderName ="";
try
{
XmlDocument doc = new XmlDocument();
if (args.Length > 1)
{
for(int i=1; i < args.Length; i++)
sIFolderName = sIFolderName + " " + args.GetValue(i).ToString().ToLower();
sIFolderName = sIFolderName.TrimStart();
Console.WriteLine(sIFolderName);
doc.Load(sIFolderName);
Console.Write(doc.OuterXml);
Console.ReadLine();
}// end if
}
catch(XmlException xmlEx)
{
Console.WriteLine("Failed to load " + sIFolderName, xmlEx.Message);
}
}
}
}

Thanks

Serial Communications

McSmack2-Mar-06 7:29

McSmack

2-Mar-06 7:29

Hello,

I just had a general question about MSComm32 or Serial Communications in .NET. When using binary transmission and receive with RThreshold = 1 (OnComm fired after every byte), does the transmission of binary data act the same as the receive data? Meaning, do I have to place one byte at a time in the MSComm.output field or can I place a whole byte array into MSComm.output?

I tried looking for examples, but every sample I found uses text transmission or is in Win32 Native.

Any help is much appreciated. Thanks in advance.

Mike

"unable to connect to remtoe server" error

amresawy2-Mar-06 7:11

amresawy

2-Mar-06 7:11

hi all, im creating a pocket pc application that uses some web services,
using ms visual studio 2005 release edition(not the beta version). i have downloade active sync and i'm using the device emulator (pocket pc 2003 se) to deploy the application but i get the error "unable to connect to remote server" ,any help?

Re: Reading data from sound card

Dan Neely2-Mar-06 7:11

Dan Neely

2-Mar-06 7:11

DON"T CROSSPOST!!!

Re: Reading data from sound card

Dan Neely2-Mar-06 7:44

Dan Neely

2-Mar-06 7:44

Because you posted it on at least 3 different forums on this site within minutes of each other.

Doing something like that will not get you an answer any faster, and may annoy someone who does know it enough that they won't bother to reply.

-- modified at 13:44 Thursday 2nd March, 2006

"Cannot implicitly convert ... " kind of error

Pete Madden2-Mar-06 6:02

Pete Madden

2-Mar-06 6:02

Unable to solve ... please help

CODE:
-----
public ProductObject[] OProduct;
ArrayList myProduct;
public void MyProduct()
{
ProductObject OProduct = new ProductObject();
myProduct = new ArrayList();

for (int i=1; i<=10; i++)
{
OProduct.Loader(i);
myProduct.Add(OProduct);
}
OProduct = (ProductObject[])myProduct.ToArray(typeof(OProduct));

}

ERROR:
------
Cannot implicitly convert type OProduct[] to OProduct

Re: "Cannot implicitly convert ... " kind of error

leppie2-Mar-06 6:19

leppie

2-Mar-06 6:19

Pete Madden wrote:
typeof(OProduct)

typeof(ProductObject)

xacc.ide-0.1.3-rc0
Now even better!

Re: "Cannot implicitly convert ... " kind of error

Pete Madden2-Mar-06 6:21

Pete Madden

2-Mar-06 6:21

thanks!

Finding MousePointer in WinForms

VenkataRamana.Gali2-Mar-06 5:35

VenkataRamana.Gali

2-Mar-06 5:35

Hello Coders,

In my Form I have LinkButton, PictureBox. I want to populate the ContextMenu MenuItems Dynamically based on the Control .

for this i need to find at which control mouse pointer is ?

any sounds will be appriciated.

regards
GV Ramana

Re: Finding MousePointer in WinForms

Koushik Biswas2-Mar-06 10:18

Koushik Biswas

2-Mar-06 10:18

Your question, at face value, sounds meaningless. Handle right click on the link button and populate the context menu accordingly (as it should be for the link button), and handle right click for the picturebox, and do the same in its handler. That's it!

But obviously the fact that you have asked the question means that there is more to it than that! So what's more?

Koushik Biswas

Re: Finding MousePointer in WinForms

leppie2-Mar-06 23:02

leppie

2-Mar-06 23:02

I think he is looking for a generic way, something like Form.KeyPreview is for keys but for the mouse. The only way I think is to use hooks, as this is the only approach I have seen.

xacc.ide-0.1.3-rc0
Now even better!

C# App

niceguyeddie19992-Mar-06 5:02

niceguyeddie1999

2-Mar-06 5:02

Hi, I have an aspx page that I want to accept 2 files. These two files in turn I wish to be parameter to a C# console App on the same webserver. Whats the best way of going about this? Also the main function Program.cs returns an int depending on results etc, how can I retrieve this? Thanks in advance,

how can i get summary properties of a video file on my desktop through c# code

samasavinirs2-Mar-06 4:05

samasavinirs

2-Mar-06 4:05

Hi,
I have been searching for help on this issue since many days.
I have a video on my desktop and it has some properties assgned to it through summary.
this can be done by right clicking the video and going into properties and then to summary tab.

Now the requiremnt is to get these details from c# code .
Any amount of help will be appreciated.

Thanks

Sama

Re: how can i get summary properties of a video file on my desktop through c# code

Sean892-Mar-06 4:37

Sean89

2-Mar-06 4:37

You need to do a search on extracting the metadata from video files.

Re: how can i get summary properties of a video file on my desktop through c# code

Mircea Grelus2-Mar-06 4:58

Mircea Grelus

2-Mar-06 4:58

Read this article[^]

regards,
Mircea
Many people spend their life going to sleep when they’re not sleepy and waking up while they still are.

Re: how can i get summary properties of a video file on my desktop through c# code

samasavinirs5-Mar-06 17:16

samasavinirs

5-Mar-06 17:16

Hi Mircea,
Thanks a ton for the article.
It helped me in solving a major part of my problem.
But i have seen the the code doesnt work for .mov,etc kinds of files.
my req was to take metadata including comments,keywords from video files.
if you could provide me more help , i would be very grateful to you.

Thanks,
Sama Smile | :)

Re: how can i get summary properties of a video file on my desktop through c# code

Dan Neely6-Mar-06 2:00

Dan Neely

6-Mar-06 2:00

you'll need to google other formats to find how they store thier meta data. Info on the .mov format can probably be found on apples website somewhere.

DLL releted Error.

Divyang Mithaiwala2-Mar-06 3:19

Divyang Mithaiwala

2-Mar-06 3:19

Hello all,

I made one project in VS 2005 C# in which i use on dll file. I also make setup for that. So when i install this it will copy all sll files.

Now error is that when one dll i use it will error that LoadLibrary(DLL Difile)fail. Reinstall application will fix it.

Now a computer which has VS 2005 the error is not come for this PC. & a PC which has no VS2005 only FrameWork 2.0 it will give error.

Rearads,
Divyang Mithaiwala

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