Managed C++/CLI

Re: Indexers, MC++ and C#

13-Jun-02 22:02

Its not just MC++ collections that can't be accessible through C# indexers; its that MC++ indexers don't come up in C# as indexers.

I can't figure out why that is; because I haven't looked into it much; maybe I'll revisit that issue now Smile | :)

James

Nish Nishant13-Jun-02 22:34

Very slow debug startup when debugging mc++ mixed app

13-Jun-02 22:34

James T. Johnson wrote:
Its not just MC++ collections that can't be accessible through C# indexers; its that MC++ indexers don't come up in C# as indexers.

I can't figure out why that is; because I haven't looked into it much; maybe I'll revisit that issue now

Puzzling!!!

Nish Suspicious | :suss:

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Chris Hafey8-Jun-02 18:56

Chris Hafey

8-Jun-02 18:56

It takes the debugger about 10 seconds to start up when debugging mixed managed and unmanaged C++ code. If I set the debugger to "managed only", the application is launched in less than one second. I noticed that the network is very busy during the launching of the debugger when in mixed mode - is there something I can change to get mixed mode debugging to startup faster? Thanks

Chris Hafey

Re: Very slow debug startup when debugging mc++ mixed app

Nish Nishant8-Jun-02 19:35

Re: Very slow debug startup when debugging mc++ mixed app

8-Jun-02 19:35

I have had the same problem. When mixing managed and unmanaged code the debugger is super slow. Sometimes I get so fed up I use Ctrl-F5 and run it non-debugged

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Brandon Parker13-Jun-02 7:26

Brandon Parker

13-Jun-02 7:26

I hear you. I am soooo sick of this. I need to find a computer running dual processors!!! Cry | :((

Re: Very slow debug startup when debugging mc++ mixed app

Nish Nishant13-Jun-02 8:30

13-Jun-02 8:30

Brandon Parker wrote:
find a computer running dual processors!!!

I was thinking quad P IV with 2GB RAM

Nish Frown | :-(

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Indexers

Michael Mac8-Jun-02 9:12

8-Jun-02 9:12

I'm writting an app in MC++. One of its class is a collection and I don't know what to do to have indexers in C#.

When I disassemble C# code the indexer function is as follow:

get_Item : class System.String(int32)

I tried to add function like this but I didn't work. Cry | :((

Can somebody tell if it's possible.

James T. Johnson8-Jun-02 10:38

8-Jun-02 10:38

Create a property called Item which takes a common parameter in both its set/get functions. ie

__property System::String* get_Item(int index)
{ 
  ....
}
 
__property void set_Item(int index, System::String* value)
{
  ....
}

I don't see anything that lets you create a C# indexer were the class instance can be treated as an array; I assume if you use the Item property name it allows C# to use it as if it were one.

HTH,

James

Michael Mac8-Jun-02 11:14

8-Jun-02 11:14

I don't work.

C++ function disassembly is

.method public specialname instance string 
        get_Item(int32 index) cil managed

and C# is

.method public hidebysig specialname instance string 
        get_Item(int32 index) cil managed

Mayby it's possible to write this function in CLR?

James T. Johnson8-Jun-02 15:14

8-Jun-02 15:14

It appears Indexers created in MC++ only work in MC++ AND you can't create an indexer that operates on a class instance.

I'll look into it more after the hockey game Smile | :)

James

Michael Mac8-Jun-02 21:03

A problem with serializtion

8-Jun-02 21:03

I'll appreciate it. Smile | :)

Thanks

Michael Mac8-Jun-02 1:33

8-Jun-02 1:33

I want to serialize using xml a class which contains a IPEndPoint field. I can't get it to work. Does anybody know what to do? But I don't want to use other formatter. Help!!! Please. Cry | :((

public class __gc Message
{
public:
   __property Byte get_ByteMessage ( )[] { return m_byteMessage; }
   __property void set_ByteMessage ( Byte byteMessage[] ) { m_byteMessage = byteMessage; }
   __property IPEndPoint* get_Sender ( ) { return m_ipeEndPoint; }
private:
   Byte m_byteMessage[];   
   IPEndPoint* m_ipeEndPoint;
}

Nish Nishant8-Jun-02 1:51

8-Jun-02 1:51

Is IPEndPoint a serializable class? If not it won;t get serialized. Not automatically. Not sure of this, but if you can derive another class from IPEndPoint, and then add the serialization stuff, it just might work. Not very sure about it though, as I already said Smile | :)

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Michael Mac8-Jun-02 2:12

8-Jun-02 2:12

IPEndPoint is a serializable class. In addition, I can't even serialize IPEndPoint itself using xml of course.

m_xmlsSerializer = new XmlSerializer( __typeof ( IPEndPoint) );
// an error with message "There was an error reflecting 'System.Net.IPEndPoint'.

Any other ideas?
Cry | :((

Rama Krishna Vavilala13-Jun-02 12:58

Rama Krishna Vavilala

13-Jun-02 12:58

Michael Mac wrote:
I can't even serialize IPEndPoint itself using xml of course.

Does it have a public constructor? The exception normally gives the detail reason of what is missing from the class

Michael Mac13-Jun-02 22:04

13-Jun-02 22:04

The code shown below

XmlSerializer* xml = new XmlSerializer ( __typeof( IPEndPoint ) );

returns an exception with the message: "There was an error reflecting 'System.Net.IPEndPoint'".
So I think it's impossible to serialize IPEndPoint class using XML. The alternatives are BinaryFormatter and SoapFormatter.

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4d 69 63 68 61 65 6c

James T. Johnson13-Jun-02 22:13

Mixing managed and unmanaged code

13-Jun-02 22:13

Correct; unfortunately MS didn't document this topic very well. The XmlSerializer doesn't use any of the other serialization stuff, no Serializable attribute nor ISerializable; I think its a shame myself.

The XmlSerializer works by using the reflection.emit classes to construct a class that will place all the public fields/property's in an XML document; when it deserializes it tries to access the nodes in the document as the field/property name to place the value back in. When it does this it creates an instance of the object using the default constructor.

It DOES let you control some functionality by using Attributes and the OverrideAttributes class; but I don't like that solution very well.

James

Alexandru Savescu6-Jun-02 0:58

6-Jun-02 0:58

Suppose I have an old application with unmanaged code and I adding some .NET classes that are of course managed.
The question is: Will my unmanaged code be compiled as native code and the managed code will be CLR metadata? I am asking this, because I want my old, unmanaged part of application to be very fast, not a MSIL that is at first run (?) compiled into native code.

Best regards,
Alexandru Savescu

Nish Nishant6-Jun-02 1:38

6-Jun-02 1:38

Use #pragma unmanaged to specify that the following code is to be compiled to native code and #pragma managed when you end the native stuff

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Alexandru Savescu7-Jun-02 10:00

7-Jun-02 10:00

Thanks Nish!

However what if I want to declare a managed type inside of an existing class? Will then my whole class be managed? (This is something that I would not like Smile | :)

)

Best regards,
Alexandru Savescu

Nish Nishant7-Jun-02 14:07

7-Jun-02 14:07

Alexpro wrote:
Will then my whole class be managed? (This is something that I would not like )

No. If you want to use a managed type inside say your CDialog class, then you'll have to only add #pragma managed for the function in the class, where you use the managed type. That was how it was in Beta 2. I didn't chk to see if it allows you to have a managed line of code inside an unmanaged marked function. I should think not!

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Alexandru Savescu7-Jun-02 21:48

7-Jun-02 21:48

Nish - Native CPian wrote:
if it allows you to have a managed line of code inside an unmanaged marked function. I should think not!

It doesn't!

Best regards,
Alexandru Savescu

Nish Nishant7-Jun-02 21:45

7-Jun-02 21:45

Alexpro wrote:
It doesn't!

Well, at least, they granularised at the function level instead of at the class level which would have been horrible.

Nish Smile | :)

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Fatest Way Around

Sidney5-Jun-02 15:33

Sidney

5-Jun-02 15:33

Hi everyone,

I need advice regardin my problem, here's my problem:

I have a Text File(serves as my database) with 3 colums fixed length, example

Name Address Age
AAA 123 Anywhere 12
BBB .... ...
Joseph 345 Somewhere 15
Rosie 098 Cool DC 20

I need to search this Text File, in the real world this Text File migh contain 1 Million records as soon as we populate our database.

My question is... what is the fastest way to search for a particular string in this text file. Note: I only search for the name, If I find the name... I need to get the enrite line and process it.

I will really appreciate any help that you can give me.

Thanks/Regards
Sidney

Re: Fatest Way Around

Alexandru Savescu5-Jun-02 18:01