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how to serialize/deserialize derived class between two application? here is the situation:
class container
{
BaseClass bc;
}
class BaseClass
{..}
class DerivedClass1:BaseClass
{...}
class DerivedClass2:BaseClass
{...}
------------------------------------------
the "bc" in the container can be assigned to be DerivedClass1 or DerivedClass2. Those classes and serialize/deserialize functions will be use between two applications (App1, App2). App1 serialize "container", App2 try to deserialize "container".
I tried following ways:
1. Binaryformatter/Soapformatter: During the serialization, App1's name will also be serialized. When App2 try to deserialize, it can not find App1 and generate exceptions.
2. XmlSerializer: it can not serialize when "bc" is assgined to a class other than BaseClass
Any guru have any good method to handle this situation?
Thanks,
Leo
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Anonymous wrote:
1. Binaryformatter/Soapformatter: During the serialization, App1's name will also be serialized. When App2 try to deserialize, it can not find App1 and generate exceptions.
You can add an attribute to any member variable [NonSerialized] (could be slightly different spelling) that will cause the formatters to ignore the member when serializing.
Anonymous wrote:
2. XmlSerializer: it can not serialize when "bc" is assgined to a class other than BaseClass
This is one of the great problems I've runinto when serializing something in Xml. You must explicitly state what base classes the member or property will take on via attributes. Here is a good article on the matter
Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n
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I'm looking for a PushButton control, similar to the pushbuttons that you see on a ToolBar, but without having to use a ToolBar. I'm surprised that the standard Button doesn't include anything to support this - the closest thing appears to be the FlatStyle (which *could* sort-of look similar). Have I missed something??
- mike bray
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I assume you mean a button that has two states, pressed in and not pressed in?
For that you can use a CheckBox and set the Appearance to Button.
James
"then when you go to bed...wait, you dont do that do you....ok....when you plug into the 'hive mind' to charge yourself, ill hack into your head"
Nnamdi Onyeyiri over MSN
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I created some .Net controls that derive from System.Web.UI.WebControls.WebControl. However, I am unable add the controls to the toolbox of a project in another solution. When I click the "Browse" button and select my controls .dll, I get the following error.
'there are no components in MyVerySpecialControls.dll that can be placed on toolbox'
Any ideas?
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Hello, does anyone know how to increase the speed of a dotnet application?
I am writing a class library which wraps the C++ library. I notice it is a bit slow. Anyway to improve the speed? Anyone?
thank you.
Sonork 100.41263:Anthony_Yio
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hmm... me too facing such kind of situation. In my case, the part written in VC++ is COM based application. I will be consuming the COM application via Interop. C# provides option of unsafe code which improves speed dramatically. Thats why I have suggested my company ASP .NET (might be in C# or VB) as front end application.
mE
---------------------
A gasp of breath,
A sudden death:
The tale begun.
A rustled page
Passes an age:
The tale is done.
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My first question would be "Are you running the program from inside the VS.net environment?" I've noticed that some of my programs run a bit slower inside the environment than when I run them directly.
Short of that, could you be more specific as to what is slow? I've interfaced with several libraries without any speed problems at all - perhaps it is the C++ library that is slow itself??
- mike bray
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Thank you Mike for attending my question.
>>"Are you running the program from inside the VS.net environment?"
No. it is not. However, I don't think that would make much different unless you are talking about release built and debug built.
Okay, here are some of the informations of my project. It is basically a class library which wraps the C++ source codes. It does image processing.
I notice that the dotnet built is slower than the original built in C++ although I realize that my class library still runs on Win32 platform and not dotnet. You could check this by going to configuration manager properties in VS.NET.
In short, I would like to know are there any tuning or setting in the configuration that allow me to optimize my class library execution speed.
I would like my dotnet class library to be as closest fast to the C++ executables as possible.
thank you.
Sonork 100.41263:Anthony_Yio
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Apologies if its not on the correct forum (there didn't seem to be a relevant one), but, does anyone know if there's any way of uninstalling DirectX8 from the MSDN package (under VS.net2003) and replacing it with the DirectX7 SDK?
Thanks in advance,
Gary.
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I am using COM+ and distributed transaction between two db.
SQLServer 2000 is installed on Microsoft 2003 standard server edition.
My COM+'s are located on Microsoft XP professional.
I triggered my client, but I got following error message.
Is there anyone who can help me?
The trancsaction threw the following exception:
The partner transaction manager has disabled its support for remote/network
transactions: mscorlib
The transaction will be rolled back.
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Good Morning!
Me and my group is developing a rapid application development project. One problem that we encountered is how to add a freeware like a password generator into the windows application form. It is our first time in VB.Net and we have a lot time to catch up.
Thank you very much...
Hope for your reponse asap...
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I'm trying to develop a custom component library in C#. One of the set of objects in these components would be dropdown controls (DateTime picker with dropdown calender, Numeric edit with dropdown calculator, dropdown tree control, etc.)
From what I understand, for these objects (calendar, calculator, tree, etc.) to drop down in the "correct" way, they shouldn't be forms, but actually WS_POPUP windows that have the desktop as their parents. I'm imagining they should capture the mouse as soon as they drop down, report to their owner (textbox, or whatever dropped them down) and then release the mouse. Am I missing something? Is this the correct approach?
Problem number two. Is the following methodology right: I should define an interface (IPopupControl) and implement it with every desendant (like for instance: DropDownTreeView: TreeView, IPopupControl). The reason is then I should be able to assign any dropdown control to an owner, and then the owner would always call a method (like IPopupControl.Popup) because it will always be implemented. So in other words, the owner will always be accepting one object [object?] which is IPopupControl instead of a specific object (DropDownXXXX) according to what it wants to drop down. Then of course, every dropdown control will implement its own methods that are different, to report the data back to the owner control (most probably textbox).
I would have to call some Windows APIs in this process I would imagine. What are the disadvantages?
Sammy
"A good friend, is like a good book: the inside is better than the cover..."
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Visual Studio 2003 documentation contains information on System.Net.Sockets classes that are not recognized in the IDE. For example IrDAListener is unavaliable to use. Documentation states that it is in Framework 1.1. I have 1.1.4322 but it appears to be unavailable.
Have not found any update to Framework newere than what I have. Does anyone know why this is unavailable?
Dave Compton
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I believe I found my problem. This is only available in the compact Framework.
Dave
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Hey All,
I'm thinking of doing a small project for a local school. They've got a
computer room with a small network and 20 PCs running Windows 98. I'm in
the process of finding out what OS is on the server.
Basically, I'm doing an app which will probably run on SQL Server. I work
with VB.NET, so I'd like to code this in .NET if possible.
To make my app accessible to all PCs on the network, I could set up a web
server and have users browse to it, but I'd like to have the extra
functionality of WinForms. Would it be possible to program a WinForms
.exe that sits on the server and can be used by multiple users at a time?
This is the route I'd like to take if it is possible. I've done several
single-user database apps in .NET, but haven't needed to use the technology
in this way yet. Any tips are very welcome!
Cheers,
Johnny
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Have a read on MSDN and elsewhere about Windows Forms and Smart clients. I think it was Chris Sells who wrote some good articles on this subject.
Michael
'War is at best barbarism...Its glory is all moonshine. It is only those who have neither fired a shot nor heard the shrieks and groans of the wounded who cry aloud for blood, more vengeance, more desolation. War is hell.' - General William Sherman, 1879
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I have written a remoting package that exposes a singleton object and two singlecall objects. I would like to be able to track the creation/destruction of the singlecall objects via the IMessage interface. I have heard that this is possible, but am unsure on how to implement it.
I have been searching for info for several weeks now and all my previous posts have resulted in nothing. Please help!!!!
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hi,
does anyone know how to change the standardprinter in a .net application?
thanks
michael
ps:
my concret problem is that i use the acrobat pdf-control to display a pfd in my application. ich even can print it with the "printAll()" methode on the standardprinter. but i found no way to set the printer the document should be printed. i even would be thankfull for a tipp to change the sprinter-settings in the pfd-control ;o)
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Hi there,
is there anybody who has got an idea on how to catch the security-exception when starting a dot-net-executable from a network-share? I do not want to adjust the local intranet security (or do some strong naming) - just catching it. May be someone has done some stuff on how to detect the security settings for the zones or programatically adjustment?
thanx
sven
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Just an idea, but you might try putting a try catch aroun the Application.Run(new Form1(); line in the static void Main([string[] args]) function.
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Generally (at least in my experience) putting a try / catch around Application.Run(...) does absolutely nothing. I believe this is because exceptions only bubble up in their own thread, and Application.Run starts a new thread and message loop for the form you are creating, so no exceptions will be caught.
If you want to receive notification of the exception (on a global basis), you can hook to the AppDomain.CurrentDomain.UnhandledException event from within Main() before Application.Run(...), but you won't be able to stop the exception from terminating the program if the Framework considers the exception serious enough to do so.
In answering the original question, I don't believe there is any way to prevent the error (or catch it in such a way to allow the program to continue running) without altering the Security Configuration. If it were, there wouldn't be any security. What you are asking is something like asking the guard at a high-security building "I don't have credentials, but please let me in anyway."
-mike bray
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Hi,
I'm using a BindableListview for which I found the code on the web:
http://www.interact-sw.co.uk/utilities/bindablelistview/source[^]
and I'm also using the ListViewSortManager found on Code Project:
http://www.codeproject.com/cs/miscctrl/lvsortmanager.asp[^]
I have found a funny interaction between the two. After binding the ListView to the DataSource (a DataTable), when the ListView is re-sorted the data gets out of sync.
For testing purposes, I added a TextBox and a CheckBox (one of the column is Boolean), which also bind to the same DataSource.
After setting the ListView and the Controls' DataSource to the same DataTable, the data is synced such that if I select a row in the ListView, the TextBox and CheckBox show the proper values.
Now, after sorting the data using different columns, the TextBox and CheckBox don't show the same values as the selected row in the ListView.
I'm assuming this is because the DataBindings are using an index, and that re-sorting the ListView differently doesn't necessarly affect that index.
How would I proceed to "re-index" the data such that clicking an item in the ListView brings up the proper data in the textBox and CheckBox ?
I've tried doing the same with the DataGrid, and found that the DataGrid works fine, ie the data stays in sync. What does the DataGrid do in order to achieve that ?
Thanks.
Luc Morin
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I am designing a modular application where users are allowed to "wire" components together visually.
My problem now is that i have to connect a method to an event using only reflection.
So using the refleciton apis i end up with
an EventInfo representing the event, and a MethodInfo for the method. Now i want to add the method to the event as a handler.
I should use the EventInfo.AddEventHandler method. This requires a delegate for the handler. So how do i convert from the methodInfo to a delegate ?
System.Delegate has a CreateDelegate static method, but all those require a "delegate Type" argument. I suppose this is there because the compiler generates distinct delegate derived types when seeing the "delegate" C# keyword.
However i can't know all those infos in advance so i can't have a delegeate type for each possible method signature..
Is there any way around this ? So i can connect any method to any event without a compile time known delegate type... ( since this would negate the benefit of wiring components from different plugin modules together ) Of course the connectio ncan only work if the method and event have the same signature.. otherwise just an exception should be thrown.
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Gluber2002 wrote:
However i can't know all those infos in advance so i can't have a delegeate type for each possible method signature..
This a pain, hopefully this will addressed in V2.
My suggestion would be to construct these delegates, once the assembly gets resolved in the AppDomain. Obviously these delegates will be known then and one can just attach the necesary one.
Gluber2002 wrote:
So i can connect any method to any event without a compile time known delegate type...
You cant have one without the other. So no. That scenario doesnt exist.
All method parameters are known at compile time.
Explain the situation a bit more. Are you trying to do something similar to the event method selector in the winforms editor?
leppie::AllocCPArticle("Zee blog");
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