Managed C++/CLI

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Re: Weird warning when using gcroot Nish Nishant22-Jul-02 18:00 Nish Nishant 22-Jul-02 18:00  Hello Rama/James It's a well know bug it seems. It happens when you use gcroot in an MFC application compiled with /clr. See this reply from a Microsoft guy in reply to a similar question that got asked in the dotnet mailing list. From: "Mark Hall (VC++)" <markhall@MICROSOFT.COM> Subject: Re: gcroot template with warning C4244? This is a mismatch between the way the GCHandle class is defined and the way C++ implements the -Wp64 warnings. In short, intptr_t and System::IntPtr were not recognized as fully compatible. This will be fixed in the next release. Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: Weird warning when using gcroot Rama Krishna Vavilala22-Jul-02 14:58 Rama Krishna Vavilala 22-Jul-02 14:58  What is weird in it? It is very valid warning. It says that for 64 bit code your casting would create problems. What is the line of code? Step back, rub your eyes, take a deep breath, stretch a bit, and reflect on the relative importance of CP, CG, the age / travel time sustained by supposedly 'fresh' cheese curds, and Life in General. - Shog9 Re: Weird warning when using gcroot Nish Nishant22-Jul-02 17:57 Nish Nishant 22-Jul-02 17:57  Hello Rama See my reply to James T J Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Palm Os programming ib04212919-Jul-02 8:26 ib042129 19-Jul-02 8:26  Does anyone know what is the function in Palm SDK that gives me the time in milliseconds? Thank you. Re: Palm Os programming Nish Nishant19-Jul-02 15:43 Nish Nishant 19-Jul-02 15:43  ib042129 wrote: Does anyone know what is the function in Palm SDK that gives me the time in milliseconds? Sorry, but this is the Managed C++ forum Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: Palm Os programming ib04212922-Jul-02 6:41 ib042129 22-Jul-02 6:41  Well where can I post this question and get a useful answer. (Please don't refer me to the Palm people. [palm.com]) Re: Palm Os programming Rama Krishna Vavilala22-Jul-02 14:59 Rama Krishna Vavilala 22-Jul-02 14:59  Post it in this forum Step back, rub your eyes, take a deep breath, stretch a bit, and reflect on the relative importance of CP, CG, the age / travel time sustained by supposedly 'fresh' cheese curds, and Life in General. - Shog9 Re: Palm Os programming Nish Nishant22-Jul-02 15:59 Nish Nishant 22-Jul-02 15:59  LOL You wicked wicked man!!! Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: Palm Os programming ib04212923-Jul-02 6:43 ib042129 23-Jul-02 6:43  I don't think that's what the lounge is for. OleDbCommand - peculiar issue Nish Nishant19-Jul-02 3:21 Nish Nishant 19-Jul-02 3:21  I had a table called user and it had a field called password. My SQL worked when directly executed into Access XP, but failed via OleDbCommand. Finally I had to rename the table User to Usr and the field password to passwd! Does User and password have any special meaning to OleDbCommand or is this another MC++ issue???? I don't remember similar issues with C# Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] How to wrap lines? Nish Nishant19-Jul-02 2:49 Nish Nishant 19-Jul-02 2:49  If I have a long string :- "aaa.........lonnnggg............bbb" and I want to write it as "aaa........" "...longggg..." "...bbb" I get a compile error of "newline in constant" I remember being able to do this in VC++ 6! What do I add as a line break character to do this in VC++ 7 for an MC++ project? Regards Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: How to wrap lines? Nish Nishant19-Jul-02 2:51 Nish Nishant 19-Jul-02 2:51  Kindly ignore post!!! I had an additional " Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: How to wrap lines? ColinDavies19-Jul-02 19:22 ColinDavies 19-Jul-02 19:22  Don't ya hate it when that happens. Regardz Colin J Davies Sonork ID 100.9197:Colin I am sick of fighting with Martin, I think I will ignore his posts from here on in, and spend the time working on articles instead. Christian Graus Design issue - OleDbConnection Nish Nishant19-Jul-02 2:43 Nish Nishant 19-Jul-02 2:43  Let's say we have a class A that wraps a DB table. Now suppose this has an Add method, should we use a OleDbConnection local to that function to do the insert? Or should we have a OleDbConnection member for the class A and open it in the constructor and kill it in the destructor. The Add function is an infrequently used function. A is a remotable object and my worry is that it might be kept alive too long and in such cases if there is a network outage or something, I am scared that the class will be destroyed out of the blue and the DB might not be closed properly. Any suggestions are welcome Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: Design issue - OleDbConnection Alexandru Savescu19-Jul-02 3:57 Alexandru Savescu 19-Jul-02 3:57  You may be better off using a DataSet. It caches data from the server and you can store it on the client (Assume you connect to a data source and display everything in a data grid for example) Then you will perform any operations on the client and update everything in the end. Thus, you do not have to worry about the connection being help up. For additional info on datasets check my article here. I hope that helps. Best regards, Alexandru Savescu Re: Design issue - OleDbConnection Nish Nishant19-Jul-02 4:04 Nish Nishant 19-Jul-02 4:04  Problem is that the DB connection is on the remoting server and it's the client that invokes calls remotely. The kind of app I have in mind had an issue that a client might connect and then disconnect only after 6 hours or even a full day. I am worried about a connection being alive for that long and timing out in between. Datasets also don't seem same for this. If a network failure occurs, then I won't be able to flush the data in time. Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Re: Design issue - OleDbConnection Alexandru Savescu19-Jul-02 4:15 Alexandru Savescu 19-Jul-02 4:15  Well, having a connection open for 6 hours non-stop is bad in every sense you want: bad design, bad implementation etc. The Internet itself was not designed to keep connections alive (see the IP protocol). You have every reason for connections alive that long. You don't speak on a phone that much (and a phone keeps a connection open) Anyway, datasets may be a better option. You may from time to time flush data in backgound (say every 30 minutes). Also, if data is not flushed on time (or timeout occurs when updating) then you can catch an exception and always retry. Best regards, Alexandru Savescu Re: Design issue - OleDbConnection Nish Nishant19-Jul-02 4:23 Nish Nishant 19-Jul-02 4:23  It's not about bad design here Alex. I don't have a choice here. A remote client may do what it wants to. We cannot dictate to it to close after a minimum while I like your periodic flush idea. I'll do that. And yeah, I'll take a look at your Dataset article too Thanks Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Multiple objects? Or one BIG object? A design question! Nish Nishant18-Jul-02 1:40 Nish Nishant 18-Jul-02 1:40  If I need to remote 3-4 objects, should I start as many TcpChannels as there are objects and listen on them, meaning I have 4 ports open; or is it better design to have one master object which is remoted and which has methods to return each of the n number of objects? Regards Nish p.s. The context is .NET remoting using MC++ and the BCL Author of the romantic comedy Summer Love and Some more Cricket [New Win] Review by Shog9 Click here for review[NW] Marshaling an interface between threads in a process Michael Mac14-Jul-02 10:54 Michael Mac 14-Jul-02 10:54  I've got some problem trying to marshal an interface between threads in a process. In Win32 app I can call CoMarshalInterThreadInterfaceInStream to marshal and CoGetInterfaceAndReleaseStream to unmarshal or use Global Interface Table but I don't know how to declare this functions/Com class in the .NET. Or mayby there is another solution build-in the framework. Can you guys write some example how to use this functions/COM class I'll appreciate it. Thanks in advance 43 68 65 65 72 73 2c 4d 69 63 68 61 65 6c Re: Marshaling an interface between threads in a process Rama Krishna Vavilala16-Jul-02 11:10 Rama Krishna Vavilala 16-Jul-02 11:10  In my opionion the framework takes care of that for you. Step back, rub your eyes, take a deep breath, stretch a bit, and reflect on the relative importance of CP, CG, the age / travel time sustained by supposedly 'fresh' cheese curds, and Life in General. - Shog9 Re: Marshaling an interface between threads in a process Michael Mac17-Jul-02 0:16 Michael Mac 17-Jul-02 0:16  That's right. I found the answer in the .Net SDK. But there is one requirement - both threads must be in the STA apartment, otherwise the function call on the interface will fail. 43 68 65 65 72 73 2c 4d 69 63 68 61 65 6c Excel format IO ILLCOMM10-Jul-02 10:22 ILLCOMM 10-Jul-02 10:22  i need to take data from an existing excel document use it to match something then place the output in a new column in the original excel document. is this possible? i program in c++ using the g++ complier in a unix environment... Re: Excel format IO Carlos Antollini10-Jul-02 10:30 Carlos Antollini 10-Jul-02 10:30  It's very hard, to say, but try here Regards Carlos Antollini. Sonork ID 100.10529 cantollini Copy a CString to a Stream* Alexandru Savescu9-Jul-02 3:20 Alexandru Savescu 9-Jul-02 3:20  Hi! I am using an application that is using both managed to unmanaged code. I want to copy data from a CString to a Stream* (it may be MemoryStream or BufferedStream - whichever is faster). Can anyone help? Thanks Best regards, Alexandru Savescu

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