Re: Using Return Value ... - C# Discussion Boards

Re: Embarrassed - Simple Form Question

14-Jun-06 11:08

If i get your problem: you wanna open form2 from form1. and then close form2. using this.close(); is good. it will close form2 but not form1. the next time u call form2 again form form1 everything should be refreshed.

Donkaiser

kasik14-Jun-06 12:08

kasik

14-Jun-06 12:08

Angel1058 wrote:
'Close()'. Does that destroy the window?

If you mean will secondform be a null pointer after it's called, then no. Close() disposes the form and it's contents, and destroys it's window handle, but comparing secondform to null (like you're doing in your OnClickEvent() method) will return false.

You can use the IsDisposed property of the Form to check to see if the form has been disposed, and that should work (but you'd have to check if it's null first)...

if ( secondform == null || secondform.IsDisposed )
    secondform = new MyForm(data_for_form_listbox)

Hope that helps Smile | :)

“Accept that some days you are the pigeon, and some days you are the statue” -- David Brent

Cheers,
Will H

Re: Embarrassed - Simple Form Question

Malcolm Smart14-Jun-06 20:44

Malcolm Smart

14-Jun-06 20:44

secondform.IsDisposed

That's what I was missing - many thanks. Amazing, I've used MFC/VC++ for years and years and yet couldn't even successfully close and reopen a form in C#....doh.

Thanks again.

Regards

Rose | [Rose]

Angel

*********************************************
The sooner you fall behind, the longer you have to catch up.

Shape in VS2005

donkaiser14-Jun-06 10:47

Using Return Value ... [modified]

14-Jun-06 10:47

Can we still drag and drop shape onto the form?
I want to draw 8 circles (names Circle) and each one is in an array (Circle #1 = Circle[0]).
How can we do that?

Thank you

Donkaiser

mostafa_h14-Jun-06 10:16

14-Jun-06 10:16

hi there !
I wrote the following Function , Like this :

private int YourNo(int Number)
{
...
Number=(X+Y)*100;
return Number;
}

I want to use of this function(the value of Number parameter) in this Event :

private void calculate_Click((object sender, EventArgs e)<br />
{<br />
txtNumber.Text=....?<br />
}

in txtNumber.Text I want to put the value of returning function(Number).
How can i use it(Number parameter) ?
thanks a lot
regards,

s_mostafa_h

-- modified at 16:18 Wednesday 14th June, 2006

Elina Blank14-Jun-06 10:49

Elina Blank

14-Jun-06 10:49

Try this:
txtNumber.Text=YourNo(Number).ToString();

Sincerely,
Elina

Life is great!!!
Enjoy every moment of it! Blush | :O

mostafa_h14-Jun-06 11:12

14-Jun-06 11:12

hi !
it doesn't work . did you test it ?
Regards , Cool | :cool:

s_mostafa_h

Elina Blank14-Jun-06 11:17

Elina Blank

14-Jun-06 11:17

No sorry,
It was an idea Smile | :)

What error message you get?

Sincerely,
Elina

Life is great!!!
Enjoy every moment of it! Blush | :O

Guffa14-Jun-06 11:37

Guffa

14-Jun-06 11:37

The code that Elina suggested is basically correct. What you have to do is just substitute the "Number" with the value you want to send into the function.

What do you mean by "doesn't work", really? What happens? Do you get an error message?

What does the "..." in the function represent? Do you use the value of the parameter at all?

---
b { font-weight: normal; }

albCode14-Jun-06 22:46

albCode

14-Jun-06 22:46

private int YourNo(int Number)<br />
{<br />
int x = 10;<br />
int y = 5;<br />
Number=(X+Y)*100;<br />
return Number;<br />
}<br />
<br />
<br />
<br />
private void calculate_Click((object sender, EventArgs e)<br />
{<br />
txtNumber.Text= YourNo(Convert.ToInt32(txtNumber.Text)).ToString();<br />
}

mostafa_h23-Jun-06 4:35

23-Jun-06 4:35

hi there !
thnks for ur reply !

albCode wrote:
txtNumber.Text= YourNo(Convert.ToInt32(txtNumber.Text)).ToString();

Why "YourNo(Convert.ToInt32(txtNumber.Text))..." ? , I want to use of "Number Parameter " , when I clicked the button ,
Regards ,

s_mostafa_h

albCode23-Jun-06 4:41

albCode

23-Jun-06 4:41

mostafa_h wrote:
Why "YourNo(Convert.ToInt32(txtNumber.Text))..." ?

txtNumber.Text is parameter which u give in YourNo

mostafa_h23-Jun-06 9:07

23-Jun-06 9:07

but I want to use the return Value "Number" in Event .
txtNumber.Text= YourNo(Number).ToString();
but I have this Error message :
the name 'Number' doesn't exist in the current context .
Regards ,

s_mostafa_h

mostafa_h23-Jun-06 23:56

23-Jun-06 23:56

the problem was solved as following :

private int YourNo(out int Number)
{
...
Number=(X+Y)*100;
return Number;
}

and :

private void calculate_Click((object sender, EventArgs e)
{
int output;
YourNo(out output);
txtNumber.Text=output.ToString();
}

Regards ,

s_mostafa_h

C# and excel

Balaj_C14-Jun-06 9:48

Balaj_C

14-Jun-06 9:48

Hello i have a C# program which loads a excel file and read its contents. I want to know how can my program be notified if some one modifies the file i am using so that i get the new data. I can handle events for excel object which opened through my program but what if some other user opens the files and modifies and i want that notification. Is there way i can send a remoting message from excel event handlers to C# application?. If so any help or code snippets will be great help

venky

Re: C# and excel

Dustin Metzgar14-Jun-06 9:53

Dustin Metzgar

14-Jun-06 9:53

Why don't you just use a FileSystemWatcher to watch files in that directory?

Logifusion[^]

Re: C# and excel

Balaj_C14-Jun-06 10:53

Balaj_C

14-Jun-06 10:53

well,i can try that but is there any other way? Is there a way to send a remoting call from Excel event handlers?

multiple line label

donkaiser14-Jun-06 9:37

14-Jun-06 9:37

what should i do to make my label accepting multiple line of text.
I remember in vb5 we can resize the label the way we want to and the text will wrap automatically too.

Donkaiser

Re: multiple line label

donkaiser14-Jun-06 9:58