Re: generating numbers automatically - C# Discussion Boards

crisjala3-Mar-10 18:55

3-Mar-10 18:55

HI I'M NEW TO C# I'M CREATING MENU
AND DONE BUT THE PROBLEM IS WHEN I CLICK THE MENU ITEM 3 TIMES THE FORM WILL SHOW 3 TIMES AND I WANT TRAP THAT IF THE FORM ALREADY LOADED YOU CANT OPEN THE FORM TWICE UNLESS THE USER CLOSE THE FORM..
HOW TO TRAP FORM TO LOAD ONLY ONCE

Re: HOW TO TRAP FORM TO LOAD ONLY ONCE

Saksida Bojan3-Mar-10 19:02

Saksida Bojan

3-Mar-10 19:02

If you use ShowDialog() instead Show(). If you use ShowModal(), you will prevent code execution till you close your form.

OR declare Form with a global or class scope. And you can put boolean value inside form. And use OnLoad event and Close event to set it to true or false. And before showing you should check that boolean.

PS: It is rude to shout

Re: HOW TO TRAP FORM TO LOAD ONLY ONCE

crisjala3-Mar-10 19:09

crisjala

3-Mar-10 19:09

can you give me sample sir on how to do it...

Re: HOW TO TRAP FORM TO LOAD ONLY ONCE

Saksida Bojan3-Mar-10 19:16

Saksida Bojan

3-Mar-10 19:16

First way:

Form form1 = new Form();
form1.ShowDiealog();

second way:

// Not tested, writing from memory;
public class testForm : Form
{
   ...
   public bool opend;

   private void testForm_OnLoad(Object sender, EventArgs e)
   {
      opend = true;
   }

   private void testForm_OnClosing(Object sender, EventArgs e)
   {
      opend = false;
   }
   ...
}

// class scope wariable - Same as testForm.opend. At least i think it is called class scope.
testForm form1 = new testForm(1);
// Inside menu item method click.
if (!form1.opend)
   form1.Show();
else
   form1.Focus();

Re: HOW TO TRAP FORM TO LOAD ONLY ONCE

Dave Kreskowiak4-Mar-10 1:55

Dave Kreskowiak

4-Mar-10 1:55

Writing a post in all capital letters is the on-line equivilent of yelling at the top of your lungs.

Read the forum rules post at the top of every forum.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

generating numbers automatically

mjawadkhatri3-Mar-10 18:30

mjawadkhatri

3-Mar-10 18:30

I have a problem of generating numbers automatically....
Actually i have a textbox and the textbox should autogenerate a number everytime when user insert new record.

Thanks In Advance

Jawad Khatri

Re: generating numbers automatically

Saksida Bojan3-Mar-10 18:31

Saksida Bojan

3-Mar-10 18:31

and what is your question? What have you done so far?

Re: generating numbers automatically

mjawadkhatri3-Mar-10 18:47

mjawadkhatri

3-Mar-10 18:47

when user Insert New Record textbox generate auto number, like 1,2,3

Re: generating numbers automatically

Saksida Bojan3-Mar-10 18:49

Saksida Bojan

3-Mar-10 18:49

To increase number, look at this code:

textbox1.Text = (Convert.ToInt32(textbox1.Text)+1).ToString();

Re: generating numbers automatically

mjawadkhatri3-Mar-10 18:51

mjawadkhatri

3-Mar-10 18:51

ok thnx

Re: generating numbers automatically

Saksida Bojan3-Mar-10 18:57

Saksida Bojan

3-Mar-10 18:57

You can look at Int32.TryParse. To convert to int. The difference between .TryParse() and Convert is that Convert will throw you an exception if it cannot convert. Forgot witch one it is. TryParse will return false if faild. My preferences is Convert method

Re: generating numbers automatically

J4amieC3-Mar-10 21:40

J4amieC

3-Mar-10 21:40

mjawadkhatri wrote:
textbox should autogenerate a number everytime when user insert new record

Insert a record where? Because if the answer is a database then the database should be generating the number - not your application.

setup of window application

Milind Panchal3-Mar-10 17:41

Milind Panchal

3-Mar-10 17:41

How to make setup of window application in .net of 10 days block. Means software will work for 10 days only.

Re: setup of window application

AspDotNetDev3-Mar-10 17:47

AspDotNetDev

3-Mar-10 17:47

There are many ways of doing this. The easiest (though least secure) way of doing this is to store the date it was installed into a text file and then check that file each time the application loads. If 10 days have elapsed, then exit.

[Forum Guidelines]

Re: setup of window application

Milind Panchal3-Mar-10 17:57

Milind Panchal

3-Mar-10 17:57

But if user has changed the system date then it will not work

Re: setup of window application

Nasri873-Mar-10 22:54

Nasri87

3-Mar-10 22:54

people can delete the txt file also right? Then the application can continue work?

Transferring Focus to Multiple Buttons

gamer11273-Mar-10 13:53

gamer1127

3-Mar-10 13:53

Hi. We're having a little problem in allowing the user click/press any button from a group of buttons inside a panel. What we want is after clicking/pressing one button that is not one of the group of buttons, the user will be allowed to click/press any of the buttons in the panel. All the buttons inside the panel represent the alphabet that's why we want to do that. The button that will be clicked before doing that is a start button. So can anyone help us?

Re: Transferring Focus to Multiple Buttons

Rod Kemp3-Mar-10 17:28

Rod Kemp

3-Mar-10 17:28

So you start off with the buttons enabled property as False then when the start button is clicked you go through each control in Panel.Controls and if it is a button and not the start button set the enabled property to True.

You may want to put the alphabet buttons in a groupbox to further segregate them from any other controls, in this case you go through the GroupBox.Controls collection instead.

Regex.Split help

Aljaz1113-Mar-10 10:24

Aljaz111

3-Mar-10 10:24

I am counting words in string, that i get from text file. Using this code i get always 1 more word in counting. What could be wrong?

int stevec = 0;
string s="avc sde s a s"
string[] words = Regex.Split(s, @"[\S]+");
           foreach (string word in words)
           {
               stevec++;
           }

After deb stevec has value 6. But there are only 5 words.

Re: Regex.Split help

Kristian Sixhøj3-Mar-10 10:39

Kristian Sixhøj

3-Mar-10 10:39

I tested your regex.. Making the S lowercase did the trick.

Regex.Split(s, @"[\s]+");

Kristian Sixhoej
"You can always become better." - Tiger Woods

Re: Regex.Split help

Luc Pattyn3-Mar-10 10:40

Luc Pattyn

3-Mar-10 10:40

gee. Did you consider looking what is inside the words array? to fix a faulty program, you need to open your eyes and look around. Nobody is going to do that for you.

If you get all the facts, and still can't figure it out, then post a real question, clear and well documented.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Re: Regex.Split help

Aljaz1113-Mar-10 10:46

Aljaz111

3-Mar-10 10:46

Sorry.. while i was debuggin i couldn't see words with breakpoints, even in console they weren't visible. And with greater S using only Regex.Match the counting was correct, thats why i asked here. Anyway, thanks for help.

Re: Regex.Split help

Luc Pattyn3-Mar-10 10:53

Luc Pattyn

3-Mar-10 10:53

there are many debugging tools, the simplest one is Console.WriteLine; it works always, never had a problem with it.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Re: Regex.Split help

April Fans3-Mar-10 23:37

April Fans

3-Mar-10 23:37

@"[\S]+" should be replaced by @"[\s]+".
"s" should be the lowercase.

April

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Creating and Manipulating Zip Files

Richard Andrew x643-Mar-10 8:17

Richard Andrew x64

3-Mar-10 8:17

Does the .NET framework have built-in support for creating, manipulating, and extracting files from Windows Zip files?

If not the .NET framework, does the Win32 API have functions for that?

Thanks. Smile | :)

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