How to display messagebox only one time in a loop

Question

I am New In C sharp,

I am using messagebox to display the line. but it is in a loop so the messagebox display more times i want to display it only one time and message box should not be display for the next time.

try{
    using (var sr = File.OpenText("test.txt")){
        string newone = 20110501;//date
        string line;
        while ((line = sr.ReadLine()) != null){
            if (three => one){
                MessageBox.Show("Buy : " + line);
                //Its Displaying more than 50 times i want to displayit only
                //onetime and should dispose for the next Time
            }
        }
    }
} catch { }

Thanks In Advance.

I'm agree with @SLaks, you should learn and learn and learn. Good lock — amiry jd
– amiry jd, Commented Sep 25, 2011 at 4:44

amiry jd · Accepted Answer · 2011-09-25 04:45:55Z

5

use this:

try {
    using (var sr = File.OpenText("test.txt")) {
        bool flag = true;
        string newone = 20110501;//date
        string line;
        while ((line = sr.ReadLine()) != null) {
            if (flag) {
                MessageBox.Show("Buy : " + line);
                //Its Displaying more than 50 times i want to displayit only
                //onetime and should dispose for the next Time
            }
            flag = false;
        }
    }
} catch { }

edited Sep 25, 2011 at 4:45

answered Sep 25, 2011 at 4:25

amiry jd

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Comments

K-ballo · Accepted Answer · 2011-09-25 04:22:18Z

3

Simple have a boolean flag saying whether the message box has already been shown or not, and use it to guard that action.

Update:

bool shown = false;
...
if( !shown )
{
     MessageBox.Show("Buy : " + line);
     shown = true;
}

answered Sep 25, 2011 at 4:22

K-ballo

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Comments

SLaks · Accepted Answer · 2011-09-25 04:23:53Z

2

You're trying to break; from the loop.

answered Sep 25, 2011 at 4:23

SLaks

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1 Comment

SLaks Over a year ago

You need to learn the basics of C#. We will not write your program for you.

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