Threading Problem. - C# Discussion Boards

Re: How to get an a class without it's base class

Christian Graus14-Aug-07 12:05

14-Aug-07 12:05

You want to set properties that are common to the animal class, and then keep them that way ? So, for instance, if sex is a common property, you want to do this:

Dog bulldog=new Dog(); // defaults to male

bulldog.Sex = Sex.Female;

Dob boxer = bulldog; // boxer is male

That's a weird and counterintuitive requirement. You could do this with your own operator =, but I would recommend against it. Adding a method that creates a new Dog, then sets the local properties, is the way to go

public Dog GetDefaultAnimalWithDogProperties()
{

Dog dog = new Dog();
dog.DogBreed = this.DogBreed; // Or whatever properties are only on the dog class
return dog;
}

Christian Graus - Microsoft MVP - C++

"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: How to get an a class without it's base class [modified]

eggie514-Aug-07 12:19

eggie5

14-Aug-07 12:19

Maybe, I'm not explaining it very well, here's what I want to do without dog metaphors.

I have a class that is derived from another class that does lots of reflection.

So when I pass my class to JavascriptConvert.SerializeObject(myclass) all of the base class reflection causes a self referencing loop exception to be thrown from SerializeObject. That's why I don't want to include anything from the base class.

(SerializeObject creates a JSON string of the object)

-- modified at 18:24 Tuesday 14th August, 2007

/\ |_ E X E GG

Re: How to get an a class without it's base class

Luc Pattyn14-Aug-07 13:57

Luc Pattyn

14-Aug-07 13:57

Hi,

when you use reflection, you can specify the scope of the things you are looking for.
As an example, Type.GetMethods accepts a BindingsFlag, you may want to specify
BindingFlags.DeclaredOnly to avoid inherited stuff.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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Caret and scroll positioning

artem_coder14-Aug-07 11:37

artem_coder

14-Aug-07 11:37

Hi.
I have 2 questions: How to... (in C#)
1) set caret position in the textBox/richTextBox
2) scroll any scrollable control (multiline textBox/listView/listBox e.t.c) programmatically?

Please answer. Blush | :O

)

Artem

Re: Caret and scroll positioning

Luc Pattyn14-Aug-07 14:04

Luc Pattyn

14-Aug-07 14:04

Hi,

this is how I see it:

1.
on (Rich)TextBox, if nothing got selected (SelectionLength=0) there is a caret
at he insertion point (as defined by SelectionStart). You can make it scroll
so the caret becomes visible by calling ScrollToCaret().

2.
on ListBox, you cause scrolling by setting TopIndex to a number in the range
[0, Items.Count-1]

3.
I don't know for ListView. I hope Google and MSDN work where you live.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

DISLIN WinXp. Anyone ?

Ylno14-Aug-07 11:36

Ylno

14-Aug-07 11:36

Hello,

i've been trying for hours to setup the DISLIN graphics plotting package. When i
try to compile a program #include(ing) "dislin.h" with Borland 5.5.1 cmd line compiler
i keep getting the error: "unresolved external..." and then the name of the function
i'm trying to call. Is this because i'm missing the file that the header is refering to?

I'm trying to set DISLIN up to work on Win XP and compile with either Borland,DevC++ or Code::Blocks.

If any one has any knowledge or anything to share concerning getting this package to
work i'll be really really greatful.

Thanks.

p.s. i had a similar problem with opengl and never got that to work. And, like with this situation,
i was following every step described in the book. Perhaps it's the computer or i'm stupid.

Re: DISLIN WinXp. Anyone ?

pmarfleet14-Aug-07 11:40

pmarfleet

14-Aug-07 11:40

I don't think this is the right forum to be posting this question.

Try posting your question in one of the C++ forums.

Paul

Threading Problem.

hdv21214-Aug-07 11:21

hdv212

14-Aug-07 11:21

hi i have a waiting form and show it when i load data in my main form (by threading) and close my waiting form when loading finish, here is my code :

private void Frm_Land_Load(object sender, EventArgs e)<br />
        {<br />
            System.Threading.Thread th = new System.Threading.Thread(gu.Show_WaitingForm);<br />
            Application.DoEvents();<br />
            th.Start("Loading Data...");<br />
<br />
            this.Initialize_Data();<br />
            this.txt_date.Text = this.sh.Show_Hijri_System();<br />
            this.toolStripStatusLabel1.Text = "Ready";<br />
<br />
            Application.DoEvents();<br />
            gu.Hide_WaitingForm();           <br />
        }

but when i close waiting form, my application and Frm_Land,lost focus and go back of my windows, and i don't know how to prevent this. How to slve my problem ?

Re: Threading Problem.

Luc Pattyn14-Aug-07 14:10

Luc Pattyn

14-Aug-07 14:10

Hi,

is this .NET 1.x or is it >=2.0 ?
did you disable the cross-thread checking ? you should not.

seems like you try to create and show a form with a thread, and later hide it
from the main thread. This is illegal and will result in all kinds of anomalies.

IMO the right approach is to crate, show and later hide the WaitingForm in the
main thread, and do the "loading data..." stuff in some other thread (or maybe
a BackgroundWorker).
If the loading thread needs to update the WaitingForm, it must do so using the
Control.InvokeRequired property and Control.Invoke() method.
If unfamiliar, look it up on MSDN and/or read some CodeProject articles about it.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Convert Languages

Thaer Hamael14-Aug-07 11:14

Thaer Hamael

14-Aug-07 11:14

hi all
how i can convert the languages when i Enter in textbox1 to English language
and when i Leave it to enter to textbox2 to Arabic language or any other languages
thanks for all body hellp me
Rose | [Rose]

Thaer

Re: Convert Languages

pmarfleet14-Aug-07 11:37

pmarfleet

14-Aug-07 11:37

The .NET framework doesn't have any intrinsic ability to translate text from one language to another.

You would have to write your own language translator.

Alternatively, there are websites that provide language translation services. You could consider sending a translation request programmatically to one of these sites and screen-scraping the HTML to get the result.

Paul

i all Convert Languages

Thaer Hamael14-Aug-07 11:12

Thaer Hamael

14-Aug-07 11:12

Thaer

Re: i all Convert Languages

Luc Pattyn14-Aug-07 14:11

Luc Pattyn

14-Aug-07 14:11

h2u2

Luc Pattyn [Forum Guidelines] [My Articles]

ListView Drag n Drop

topksharma198214-Aug-07 9:08

topksharma1982

14-Aug-07 9:08

Hi All,
Is anyone knows how can i drag and drop only subitem in a listview.
I have a listview and every item contains a subitem and i just want to
drag and drop only the second subitem (e.g. First is Index and second is Name so i want to drag n drop only Names not index).
please give me a solution .

Praveen Sharma

ALT+F4

Ronni Marker14-Aug-07 8:46

Ronni Marker

14-Aug-07 8:46

Hello Gents.
Am trying to alter the way ALT+F4 closes an application and hope I can get some guru help here.

I have a component that calls an Windows form for a regstration page. On that Windows form I have two buttons.

One closes the application by:

System.Environment.Exit();

and the other button closes the application by:

System.Enviroment.Exit(-1);

The first only closes the form that runs inside the component, the later closes the whole application including what ever application who calls the component.

Now my problem is that when the form that opens inside the compoent is active and a user hits ALT+F4, then the only the component closes and not the whole application.

To me it seems that a standard ALT+F4 is like invoking System.Environment.Exit() and not System.Enviroment.Exit(-1).

Is there any way I can force ALT+F4 to close the whole application like System.Enviroment.Exit(-1) does?

Cheers,
Ronni

Re: ALT+F4

Ronni Marker14-Aug-07 19:35

Ronni Marker

14-Aug-07 19:35

Found the answer...

private void form1_FormClosing (object sender, FormClosingEventArgs e) {

if (e.CloseReason != CloseReason.ApplicationExitCall) {

System.Environment.Exit (-1);

}

}

Convert Excel to XML

T4AMD14-Aug-07 8:05

T4AMD

14-Aug-07 8:05

I was finally able to do that 1st step of getting data from Excel to the dataset. Now I am taking that dataset and converting into XML.
private string GetXML()
{
string XML = dsSource.ToString();
return XML;
}

And I get an error saying "The name 'dsSource' does not exist in the current context"

What should be the correct code? Please HELP!!!

Re: Convert Excel to XML

Giorgi Dalakishvili14-Aug-07 9:28

Giorgi Dalakishvili

14-Aug-07 9:28

It means that dsSource is neither declared in GetXML nor it is a 'global' variable. Perhaps you have declared it as a local variable in one of your methods.

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Re: Convert Excel to XML

T4AMD14-Aug-07 9:39

T4AMD

14-Aug-07 9:39

I tried:
#region private dsSource GetXml()
string Xml = dsSource.GetXml().ToString;
#endregion

But it still gives me an error. that the name dsSource does not exist in the current context.

Re: Convert Excel to XML

Michael Sync14-Aug-07 21:58

Michael Sync

14-Aug-07 21:58

AshwiniPadukone wrote:
dsSource

maybe. .dsSource Is Nothing.

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

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Active Directory

franklinm14-Aug-07 7:59

franklinm

14-Aug-07 7:59

Hello friends of the Forum
I go to their valuable help with the following problem

It is possible from net to automate Directory Activates.
Concretely I want to activate the directive one that this in

Configuration of User
Administrative insoles
System
And to enable the directive one
Alone to Execute applications of allowed windows
And to establish the list of programs EXE that the user can execute, I can them
to select of a list.
Example: winword.exe, excel.exe, etc.

My idea is that the user can make it from ASP.net

I wait their valuable help, and thank you for their time

Re: Active Directory

ekynox14-Aug-07 12:56

ekynox

14-Aug-07 12:56

try this to get you started, it shows how you can use System.DirectoryServices to query Active Directory.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sds/sds/quick_list_for_c__code_examples.asp[^]

Another solution would be to see how you can utilise WMI to interogate your active directory.

Re: Active Directory

franklinm15-Aug-07 14:30

franklinm

15-Aug-07 14:30

hi, thanks
I have searching but not find set

Software Restriction Policies

and add list of programs EXE
Example: winword.exe, excel.exe, etc.

Please help me

sqlclient

lankaudaranga14-Aug-07 7:26

lankaudaranga

14-Aug-07 7:26

how to connect sql client using c# code

Re: sqlclient

ToddHileHoffer14-Aug-07 7:28

ToddHileHoffer

14-Aug-07 7:28

connection.open()

I didn't get any requirements for the signature

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