C# Discussion Boards - CodeProject

MashALyy16-Jun-07 23:08

16-Jun-07 23:08

<b>Suppose I have numeric values in my listbox. How do I add(addition) them and display the result in textbox. Plz help me guyz. I need the code both in VB.NET as well in C#.NET. plz plz help me out.</b> Rose | [Rose]

Mash

Re: Listbox

PandemoniumPasha17-Jun-07 0:10

PandemoniumPasha

17-Jun-07 0:10

hi,
one way is to iterate through all the items in the list and add them.

you could try the following:

object[] obj= new object[listBox1.Items.Count];<br />
listBox1.Items.CopyTo(obj,0);<br />
int sum = 0;<br />
foreach( object o in obj)<br />
{<br />
 int tmp = Int32.Parse((string)o);<br />
 sum += tmp;<br />
}<br />
textBox1.Text = sum.ToString();

and one more thing please don't post the same message in multiple forums.

hope this helps

regards

Re: Listbox

Giorgi Dalakishvili17-Jun-07 0:10

Giorgi Dalakishvili

17-Jun-07 0:10

Iterate over the items of the listbox and sum them

#region signature
my articles
#endregion

Re: Listbox

Lucky Hamad17-Jun-07 7:55

Lucky Hamad

17-Jun-07 7:55

Well the concept of listbox is that it holds multiple values just like an array but the listbox control treats every data as string .lets assum that we are having a listbox name lbt1 holding seven values each value on each index.
We have to apply a loop first untill the total number of items in lbt1.e.g
// declar/initiate variables
int val=0;
int addval=0;
int total=0;
for(int i=0;i<this.lbt1.items.count;i++)
{
val=int.parse(this.lbt1.items[i].tostring());
addval=addval+val;
}
this.txt1.text=addval.tostring();

<div="" class="ForumSig">By Lucky Hamad

capture screen use managed directx9 C#

jiangsongfang16-Jun-07 21:31

jiangsongfang

16-Jun-07 21:31

i want to use directx to capture screen then save to file,because i know only a little about managed directx,so the first i Want to create a device link to the desktop,then copy the data from that device,but after i instanced a device,i can't use it,i do not know why, my code like this:

IntPtr hwnd = WinApi.GetDesktopWindow(); //i use api to get hwnd

IntPtr hdc = WinApi.GetDC(hwnd);

Device device = new Device(hdc); //instance here

//then i didn't know how to get the data i use this code

Texture t = Device.GetTexture(0); //can't work here

//or i use this

Surface s = device.GetRenderTarget(0); //also can't work

i really don't know how to do can get the data from the screen then save to file,i hope someone can help me to deal with this question,or you can give me a method to capture the screen,but do not use the gdi+ or graphics.CopyFromScreen method, i only want to use directx to do that. thanks.

Re: capture screen use managed directx9 C#

Christian Graus17-Jun-07 0:53

Christian Graus

17-Jun-07 0:53

You don't want to use DirectX for that, it's just not needed, and doesn't really help. You're on the right track, you just need to copy from the hdc to a bitmap. The desktop is not drawn using DirectX

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: capture screen use managed directx9 C#

jiangsongfang17-Jun-07 1:02

jiangsongfang

17-Jun-07 1:02

thanks for your answer, but if i want to save the screen continually like a vedio, i will save 24 bitmaps per second, this will use a lot of CPU and memory, so i'm finding a way to save the screen more quick and less use up. could you tell me how to do that,thanks very much.

Conflicting Namespaces

Brendan Vogt16-Jun-07 20:47

Brendan Vogt

16-Jun-07 20:47

Hi,

In my business logic directory I have a Property class. The namespace for this class is:

namespace MyWebsite.BusinessLogicLayer
{
public class Property
{
}
}

In my website, the I have a backend (admin) control panel where property is added, and the namespace is:

namespace MyWebsite.Web.ControlPanel.Property
{
public partial class InsertProperty : System.Web.UI.Page
{
}

private void InsertNewProperty()
{
// Here I try to insert a new property
}
}

In the InsertNewProperty() I get all the values from the input controls. When I try to create a new instance of the Property class it doesn not find it, instead it gives me an option to chooose only from the Property namespace. My reference to the Property class is like this in the .aspx page:

using MyWebsite.BusinessLogicLayer;

So I do not know what it does this. Can someone please advise me correctly?

Regards
ma se

Re: Conflicting Namespaces

PandemoniumPasha16-Jun-07 21:14

PandemoniumPasha

16-Jun-07 21:14

hi,
in such conditions, use full name:
eg:
MyWebsite.BusinessLogicLayer.Property p = new MyWebsite.BusinessLogicLayer.Property()

hope this helps.

regards

Re: Conflicting Namespaces

Christian Graus16-Jun-07 21:57

Christian Graus

16-Jun-07 21:57

you can alias one of these property objects with a using statement. It's something like using MyNamespace.MyObject = MyNewName, but I'm not sure of the precise syntax.

Re: Conflicting Namespaces

PandemoniumPasha16-Jun-07 23:56

PandemoniumPasha

16-Jun-07 23:56

as Christian mentioned, you could use

using MyNewAliasProperty = MyWebsite.BusinessLogicLayer.Property;
then in code
MyNewAliasProperty p = new MyNewAliasProperty ();

regards

Re: Conflicting Namespaces

Guffa17-Jun-07 2:52

Guffa

17-Jun-07 2:52

You can also use an alias for the namespace:

using Bll = MyWebsite.BusinessLogicLayer;

When you want to specify a class in the namespace, use the alias:

Bll.Property prop = new Bll.Propery();

---
single minded; short sighted; long gone;

Re: Conflicting Namespaces

DavidNohejl17-Jun-07 4:45

DavidNohejl

17-Jun-07 4:45

"Thou shall not name class and namespace the same."

If you can change name of either class or namespace (Properties perhaps?) by all means do it. If it is late, it is late, and use aliases as suggested above.

"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus
"Real men use mspaint for writing code and notepad for designing graphics." - Anna-Jayne Metcalfe

Re: Conflicting Namespaces

Brendan Vogt17-Jun-07 8:22

Brendan Vogt

17-Jun-07 8:22

Thanks to every one that answered!!!

Problems displaying data from query in the report

sgeorgije16-Jun-07 19:26

sgeorgije

16-Jun-07 19:26

I create a dataset from the view.
Dataset is a source for rdlc report.

Later I add new columns in view, delete view in dataset designer and drag changed view from database.
But report displey only data from old columns.

In Data Sources>>Preview Data content from new columns is visible.

Where is mistake?
Thanks for any help.

EVENTS

half-life16-Jun-07 12:14

half-life

16-Jun-07 12:14

HI,

i like to know how to inform an object that something had happend

the story is this :

i have a class named device
and a class named deviceCollection (both are user controls)

in the device class i have a button when pressed i like it to inform the
class named deviceCollection to pass the info to the GUI to be presented

if anybody could help, i'll be happy Smile | :)

my email is amor.kobi@gmail.com
if u like to sent a mail (first TNK u), but write in the TOPIC "#deviceCollection"
and again TNKS Smile | :)

kobkob

Re: EVENTS

Not Active16-Jun-07 13:33

Not Active

16-Jun-07 13:33

Your subject line says it. Events. Look it up.

only two letters away from being an asset

Re: EVENTS

half-life16-Jun-07 13:46

half-life

16-Jun-07 13:46

i know how to create an event :(Example)

public delegate void EventInfoHandler(Object sender, EventArgs e);
public event EventInfoHandler EventGo;
EventGo(this, new EventArgs());

this is the event of the device
but the device User control does not really exist (i do not have an instanse of him in the deviceCollection usercontrol).
it is been added to the deviceCollection user control
during runnig (the user push a button and create the device on the deviceCollection "into the eviceCollection.Controls Collection").
how can i inform the deviceCollection that something has Occured in the device. Smile | :)

kobkob

Re: EVENTS

Christian Graus16-Jun-07 14:49

Christian Graus

16-Jun-07 14:49

public delegate void EventInfoHandler(Object sender, EventArgs e);
public EventInfoHandler EventGo;

somewhere else:

myControl.EventGo += new MyControlClass.EventInfoHandler(this.someMethod);

Of course, it's pointless to create delegates and have the standard event signature on them, I mean, do you really want to send an object and a useless event args ?

Like someone else said, looking this up with google would give you tons of examples and info.

Speech input

Ylno16-Jun-07 11:12

Ylno

16-Jun-07 11:12

Hello All,

What's the simplest way to add speech command capabilities to a C# application?

I've been looking around on the net but there seem to obe so many different approaches.

Thanks

Re: Speech input

Christian Graus16-Jun-07 14:50

Christian Graus

16-Jun-07 14:50

Choose an SDK, buy it, and integrate it. I think MS has a free one ? Either way, it's not built in, you need to add it.

Re: Speech input

Bob X16-Jun-07 16:32

Bob X

16-Jun-07 16:32

Codeproject Articles: http://www.codeproject.com/useritems/Vista_Speech_Recognition.asp[^]
http://www.codeproject.com/useritems/SAPISophia.asp[^]

Free Engine: Microsoft Speech API[^]

Commercial: Dragon Naturally Speaking[^]

p.s. There is a recognition engine in vista, but I haven't used it. I haven't used dragon either, but haven't heard anything bad. I have used the MS SpeechAPI on XP, and I doesn't work very well. Takes a long time to train, dictation is very inaccurate. Phonome detection doesn't work very well either.

server socket

topksharma198216-Jun-07 9:43

topksharma1982

16-Jun-07 9:43

hi sirs,
i m praveen a new c# programmer , i have to develop a chat server in c# using Socket not TcpListener , now i don't know how to make my socket which can listen infinite number of clients i can do it with infinite while loop but its not working pls provide me some code , how to do it .
Thanx a lot for all of u .

Pravo

Pravo

Re: server socket

Fernando Hitch16-Jun-07 12:16

Fernando Hitch

16-Jun-07 12:16

Hello, I think that you are putting your code in the main program, your loop could make up if you make a dll and put in it the code that you need.

I hope that it helps you. D'Oh! | :doh:

The intelligence without action is nothing.
Mario T.

Re: server socket

topksharma198216-Jun-07 14:09

topksharma1982

16-Jun-07 14:09

Hi Mario ,
Thanx for reply but i need more elaboration of what u said.
And what u mean by "The intelligence without action is nothing".

Pravo

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.