Re: Creating a list/collection containing different object types - C# Discussion Boards

Re: Creating a list/collection containing different object types

30-Aug-09 5:34

object[] ? ArrayList ? List<object> ?

Trollslayer30-Aug-09 6:16

Trollslayer

30-Aug-09 6:16

Thanks PB, I'm still learning about collections.

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Re: Creating a list/collection containing different object types

Luc Pattyn30-Aug-09 6:29

Luc Pattyn

30-Aug-09 6:29

Collect items of the most specialized common type, Object[] or List<Object> would always work; if you have some intermediate base class, that would be even better. So for a drawing it could be Shape[] or List<Shape> where your shapes inherit from your base or abstract Shape class.

Smile | :)

Luc Pattyn

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Re: Creating a list/collection containing different object types

Trollslayer30-Aug-09 6:54

Trollslayer

30-Aug-09 6:54

A good idea, the other method would be something akin to the MFC VARIANT type where the members are the class types I need to put in the list.
I'll try your suggestion first.
Thanks Luc.

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Re: Creating a list/collection containing different object types

Luc Pattyn30-Aug-09 10:26

Luc Pattyn

30-Aug-09 10:26

Luc Pattyn

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UDP - Server (EndReceiveFrom) doesn't work

softwarejaeger30-Aug-09 5:16

softwarejaeger

30-Aug-09 5:16

Hello,

i had a running UDP-Server, but had the problem, that only every second package coming on. So now i wanted to re-code it with Socket and not using the UdpClient.

If i want to receive a datagram with Socket.EndReceiveFrom(ar,ref ep) it doesn't works. I get a NullReferenceException (i think the "ep" is the problem), but if i use Socket.EndReceive(ar) it works well.

Here the code:

string szData;
IPEndPoint ipe = new IPEndPoint(IPAddress.Any, 0);
EndPoint ep = (EndPoint)ipe;
int len = parent.udp_listen.EndReceiveFrom(ar,ref ep);
szData = Encoding.ASCII.GetString(buffer, 0, len);

"parent.udp_listen" is the public UdpClient which is in another class.

So what's wrong... is there another possibility to find out who is the sender of the datagram? Because i need the IP Address and the sending-Port of the sender.

Thanks

Job market Aussie ???

UBX30-Aug-09 4:02

UBX

30-Aug-09 4:02

Is there a job market in Aus for C#.net asp.net ???

Just curious ...

Abhishek Sur30-Aug-09 6:29

Abhishek Sur

30-Aug-09 6:29

Is this the right section to post this ?? WTF | :WTF:

Abhishek Sur

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UBX30-Aug-09 9:08

UBX

30-Aug-09 9:08

Well, where the hell would you post it ???
Laugh | :laugh:

DaveyM6930-Aug-09 11:11

DaveyM69

30-Aug-09 11:11

Probably in the Lounge[^]

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Joe Woodbury30-Aug-09 11:38

Joe Woodbury

30-Aug-09 11:38

No, to my knowledge Australia is not allowed to use .NET, let alone C#. This is why Chris Maunder moved to Canada.

How to assign value to textbox after it get focused in mshtml

UBX30-Aug-09 14:22

UBX

30-Aug-09 14:22

Well thats encouraging ...

Mohsen Esmailpour30-Aug-09 3:34

Mohsen Esmailpour

30-Aug-09 3:34

hi.
i have webpage that contain textbox. here is textbox code:

<input name="cardtxt1" maxlength="4" id="cardtxt1" tabindex="1" class="txtform" onpaste="doNotPaste()" onfocus="getName(this);documentFocus('cardtxt1');" onkeypress="return check_KeyPress(this,2,'0123456789')" onkeydown="noCTRL(event);" onkeyup="nextTab(this, false);" autocomplete="off" style="width: 32px;" type="text">

and i want set textbox value by this command:

HTMLInputElement card = (HTMLInputElement)doc.all.item("cardtxt1", 0); 
card1.value = Value;

but my problem is after DocumentCompleted there is no value in textbox. value assigned to textbox before it get focused and when textbox get focused value will be cleared in textbox. how can i assign value to textbox after it get focused ?
or can i remove focus on textbox ?

Deploy app without .net frx

tukhoi30-Aug-09 3:31

30-Aug-09 3:31

I'm get in stuck of deployment an desktop application. My app was compiled against .net 3.5. On machine that doesn't have .net 3.5, the setup has to download .net 3.5 before install the app. The problem is download .net 3.5 take close to an hour, then user might cancel installation process.

I already compiled my app against .net 3.5 client profile, but it still take 5-10 minutes to download and still let users go away.

I dont know if there's a way to embed .net class library into my desktop app, so it could run without .net frx, or could we compile the app into native code?

Please help me if you have answer Smile | :)

Thanks.

PIEBALDconsult30-Aug-09 3:58

30-Aug-09 3:58

No. Just mention it in the documentation or download site or whatever so that potential users know that .net is required before they download your app.

Most Windows systems already have it, so I wouldn't be especially concerned.

tukhoi30-Aug-09 5:09

30-Aug-09 5:09

Almost user have .net 1.1 or 2.0. Since my app used .net 3.5, they have to have close to 1 hour to download .net 3.5 which will let users go away...

PIEBALDconsult30-Aug-09 5:35

30-Aug-09 5:35

But that's really none of your concern.

tukhoi30-Aug-09 5:36

30-Aug-09 5:36

It's absolutely my concern Smile | :)

Luc Pattyn30-Aug-09 6:34

Luc Pattyn

30-Aug-09 6:34

AFAIK Windows Vista and Windows 7 have all versions of .NET up to 3.5 preinstalled; as 3.5 is a pure superset of 2.0 (and much larger), if you don't really need the new stuff (such as WPF), it could be advantageous to build against 2.0 as this has even better chances of being present (on XP and older), and when not will download faster. I build against 2.0 unless I really need one of the extensions...

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

PIEBALDconsult30-Aug-09 10:30

30-Aug-09 10:30

Indeed, build against the lowest version you can.
Don't use the latest features unless they offer a real benefit.

tukhoi30-Aug-09 17:35

30-Aug-09 17:35

Thank guys.

Bad news is i used WPF, then i could compile against .net 3.0 or 3.5. 3.0 is as fat as 3.5, then i compiled against .net 3.5 client profile.

However, it also took close to 10 mins to download .net 3.5 client profile, then i'm looking for better solution...