Re: Working with multiple forms - C# Discussion Boards

18-Jul-09 2:21

Hi Let's assume that I have 2 forms, the main form and the form that main form opens (Form2).

In the first form I have a button - when pressed it opens Form2 and closes the main form -. It closes main form and opens Form2 with this code:

this.Hide();

using (Form2 _Form2 = new Form2())
{
   _Form2.ShowDialog();
   this.Dispose();
}

this.Close();

When I press that button main form closes and Form2 opens without a problem, but main form doesn't get destroyed. If main form is doing something on it's thread it keeps doing it at background. I want the main form to be completely destroyed. How can I do this?

Thanks.

Luc Pattyn18-Jul-09 3:07

18-Jul-09 3:07

Hi,

Form.ShowDialog() waits for the new Form to be closed, so your Dispose statement isn't helping at all.
Try this:

this.Hide();
_Form2.ShowDialog();
this.Show();   // optional

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

SimpleData18-Jul-09 3:15

18-Jul-09 3:15

When I open Form2, I want main form to be completely destroyed but in your code it doesn't get destroyed too.

A thread is working in main form and it keeps doing what it does after the main form is closed and form2 is shown. I don't want main windows to keep doing anything.

Luc Pattyn18-Jul-09 3:27

18-Jul-09 3:27

SimpleData wrote:
A thread is working in main form

That does not make sense. A thread does not live inside a Form, a thread is a piece of code, any code, executing on a processor, and a Form is a GUI component. Maybe your Form class created and started the thread, destroying the Form would not stop such a thread, unless you do it explicitly in a destructor/finalizer but I doubt very much that is what you are doing.

If you want a thread to stop doing what it does, then tell it to stop by setting some flag, and have the thread check that flag regularly. Killing/aborting a thread the hard way isn't a very good idea.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

SimpleData18-Jul-09 3:35

18-Jul-09 3:35

How can I set a flag and then stop that thread with a destructor/finalizer?

Luc Pattyn18-Jul-09 3:53

18-Jul-09 3:53

you don't need a destructor/finalizer to stop a thread.
Here is a pseudo-code example:

Thread thread;
bool cancel;

void start_Clicked() {
    cancel=false;
    thread==new Thread(...threadCode);
    thread.Start();
}

void stop_Clicked() {
    cancel=true;
}

void threadCode() {
    while(!cancel) {
        .. do something useful
    }
}

thas is cooperative thread control: the thread is doing some of the controlability work itself (the while test)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

SimpleData18-Jul-09 4:14

Access Database in Remote Server from LAN

18-Jul-09 4:14

Thank you for your answer, I really need to make some structural changes on my code Smile | :)

vasanth arivali18-Jul-09 1:58

vasanth arivali

18-Jul-09 1:58

Hai

I want to connect the remote server from my LAN computer becoz to access the database in the remote server through C# code.
plz give me some useful ideas and examples in C#

Re: Access Database in Remote Server from LAN

dan!sh 18-Jul-09 3:08

dan!sh

18-Jul-09 3:08

Just set the data source in the connection string as the name/IP of the computer where database is. Connection string can be found here[^].

Re: Access Database in Remote Server from LAN

Monjurul Habib5-Jun-11 7:36

Monjurul Habib

5-Jun-11 7:36

http://www.vkinfotek.com/connectionstring.html[^]

Get full HTML-code

Martijn Verbakel18-Jul-09 0:28

Martijn Verbakel

18-Jul-09 0:28

Hi,

I have a problem with my WebBrowser:
I can't get the full HTML code!
I only get redirects to the frame's, but i need the code in it!
I can't go to the url, because for some reason, the page is empty then!

Please help me!
Martijn.

BTW. Sorry, i'm dutch, i can't speak very well english Poke tongue | ;-P

Re: Get full HTML-code

Mycroft Holmes18-Jul-09 0:47

Mycroft Holmes

18-Jul-09 0:47

Your english seems fine, I'm just having trouble seeing the relevance of the question to a C# forum or programming in general.

Who's html code, yours or another site. Some detail of what you are trying to achieve may be useful.

Never underestimate the power of human stupidity
RAH

Re: Get full HTML-code

Martijn Verbakel18-Jul-09 0:51

Martijn Verbakel

18-Jul-09 0:51

It's not my code.

It's from another site (http://eindhovensdagblad.ned.newsmemory.com/eebrowser/frame/develop.396.david/init/default_dglay.php?pSetup=eindhovensdagblad&type=[^])

I need the code in the frame named "data";
but: data.InnerHtml = ""

How do i know in which drive the operating system is installed in a c# application?

CoderForEver17-Jul-09 23:20

CoderForEver

17-Jul-09 23:20

I have a c# application & i want to install this application in the drive where the operating system is currently installed..................... can you tell me the code just to know in which drive is the operating system installed(like 'C','D')..............then i will work it out..

Thank you

Re: How do i know in which drive the operating system is installed in a c# application?

Luc Pattyn17-Jul-09 23:50

Re: How do i know in which drive the operating system is installed in a c# application?

17-Jul-09 23:50

Hi,

there are many ways to get such information.
One is by looking at some of the environment variables (e.g. WINDIR).
An easier one is using Environment.GetFolderPath(SpecialFolder.System)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Baeltazor18-Jul-09 0:37

Baeltazor

18-Jul-09 0:37

Thanks muchness Luc. Thumbs Up | :thumbsup:

Re: How do i know in which drive the operating system is installed in a c# application?

Luc Pattyn18-Jul-09 0:39

Re: How do i know in which drive the operating system is installed in a c# application?

18-Jul-09 0:39

all of you are welcome.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Mycroft Holmes18-Jul-09 0:49

Mycroft Holmes

18-Jul-09 0:49

I wonder if you are helping 2 people with the identical problem, or the guys schitsophrenic and can't decide which identity to use!

Never underestimate the power of human stupidity
RAH

Re: How do i know in which drive the operating system is installed in a c# application?

Luc Pattyn18-Jul-09 0:54