|
OK - The current project that I am working on has a top-level "ReferencedLibraries" directory under the solution with all of the 3rd part dlls. This seems like the way to go.
|
|
|
|
|
Yeah, that part is just completely arbitrary.
|
|
|
|
|
Hi,
Does any one know about any open source database library made in C# that contains implemnentation of select insert, update queries.
Thanks,
Mushq
|
|
|
|
|
Have you looked at SqlDataAdapter[^]? It's not open source, but it's included in the .NET framework.
If you're looking for something as a learning source, check out NHibernate.
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
What I want to do is create a table of sorts:
___________________
| |Key 1|Key 2|
|_____|_____|_____|
|Sub 1|Value|Value|
|_____|_____|_____|
|Sub 2|Value| |
|_____|_____|_____|
For example in the System.Collections.Generic.Dictionary class I can access values like so:
dictionary[key]
what I want to do is access the value like so:
table[key,sub]
Any ideas?
|
|
|
|
|
Use a multi-dimensional array[^].
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
I believe he's asking for a two-key dictionary.
|
|
|
|
|
In practice a multi-dimensional array would do the same thing...
<br />
int key1 = 0;<br />
int key2 = 1;<br />
<br />
string[,] table = new string[2,2];<br />
string x = table[key1,key2];<br />
|
|
|
|
|
That would work if the keys are ints. Andrew is correct, I'm looking for a two key dictionary.
|
|
|
|
|
Another possibility is a Collection of Collections. For example, a Dictionary of Keys whose values are another Dictionary of SubKey/Value pairs.
|
|
|
|
|
Yes I was considering that and that may be the best way to go. I don't want to use nested switches because that looks messy.
|
|
|
|
|
Switches?? What switches?? I didn't say anything about any switches.
|
|
|
|
|
Yeah, I'd just suggest nesting two generic dictionaries.
Dictionary<Keycode, Dictionary<Keycode, T>>
Something of that sort...
|
|
|
|
|
Jordanwb,
Will you always know the key and sub values?, or would there be cases where you would only have one value?
If you know both, it might not be the best solution, but you could do "key:sub" as the key for your dictionary.
Just an idea.
Regards,
Gareth.
|
|
|
|
|
The two key types are enums, so yes I would always know.
How does the "key:sub" work?
|
|
|
|
|
I use a Dictionary of Dictionaries.
There is also this[^] article.
Even simpler would be to shift one key "up" and add it to the other. k = a * 1000 + b
But, as I see you also mentioned enums, I'll also mention this[^] article. (If you like that idea, and my comments on it, let me know.)
|
|
|
|
|
Hi,
I have a realtime WindowsForms App updating business object from
a background thread (about 1000 objects). I would like to reflect
the changes in the UI.
I have had a look at INotifyPropertyChanged and BindingList but I am
getting Cross thread exceptions.
What is the best way to handle this?
- backgroundworker or
- new thread with Event wrapper using SynchronizationContext ?
Is it right to create a never ending Background worker (BGW 's
lifecycle = application's lifecycle in my case) and thus monopolize
one of the default 25 threadpool thread ?
Thanks in advance
|
|
|
|
|
reivilos wrote: What is the best way to handle this?
The UI thread should update the business objects. If the background thread needs to tell the UI to update the business object, use a SynchronizationContext and Post to it from the background thread. If you need to spawn a new thread yourself that lasts for the duration of your app, don't use a threadpool thread, create your own.
reivilos wrote: Is it right to create a never ending Background worker
Don't do that, it's not what the BackgroundWorker was designed for. Since it's using a threadpool thread, you certainly shouldn't do this. Create your own thread and make changes to the business objects by Posting to the UI thread's SynchronizationContext.
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
I am trying to use this DLL in Vista 64 bit version. It give me error (exception)
"BadImageFormatException was unhandled". The same DLL works fine with 32 bit version (Vista). Anyone has come across it, is there a way to resolve it?
|
|
|
|
|
Assuming this dll you're using is one you've built,
When you built the dll, was it built using the AnyCPU platform? If so, you must ensure there are not 32-bit specific references to your code. (Many COM objects, native dlls, 3rd party libs are all 32-bit specific. You may need to obtain 64-bit specific versions of those components.)
Another thing to try is build the dll using x64 as the platform.
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
Yes it is my own dll and it was built using 'any cpu' option. Also I tried the x64bit but it gave the same error. Sometime it give NotValidEntryPointException, othertimes it gives BadImageException. It work fine on 32bit wondows though.
I am not deep into COM so i do not know what can go wrong there.
|
|
|
|
|
Does your dll use any 3rd party libraries? COM objects? Does it make P/Invoke calls into native dlls?
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
Yes it does use third party libraries. I am new to c# so I do not know much about p/invoke but yes it uses p/invoke as well. I do not think it uses COM objects. Again it is working on on 64bit machine (not a vista one).
|
|
|
|
|
Can you post some of your P/Invoke calls? Most likely it's an issue with those.
Tech, life, family, faith: Give me a visit.
From my latest post: "It's sobering to watch: the whole country stops for 2 minutes as a siren is blast to remember the 22,437 victims of terror and soldiers who died in defense of Israel..."
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
Here is the format of one such call.
[DllImport(dllName, ExactSpelling=true, SetLastError=false, CallingConvention=CallingConvention.Cdecl)]<br />
internal static extern float a_function(int n, [In] float[] x, int incX);<br />
Thanks.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
