How do I add numbers continuesly and get a total in C#

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hello, I want to create a daily program in c# ( in visual studio 2017 ), it should be like this :
there is a textbox - label - 'BTN' and at the bottom of those is a name of something like Photoshop and so the label at first shows 0 ( hours ) and then when u add a number to textbox like "2:30" minutes and hit the 'BTN' the label should show 2:30 (hours). and another thing is that I want it to sync with a vertical progress bar ( I know how to make this one ) but I don't know how to sync it with progress bar and I want it to save everything in a SQL database every time that I add a number. I know this is a lot ( maybe for me cause I'm a beginner ) but please if u know how to make it, help me. thank you.

What I have tried:

I did a lot of research in google and YouTube and this Is what I got ( I made a calculator first but it wasn't what I want):

public Form1()
        {
            InitializeComponent();
        }

        int a = 0;

        private void button1_Click(object sender, EventArgs e)
        {
            a++;
            label1.Text = a.ToString();
        }

I want something like this but instead of counting my clicks it should add the numbers that I type in textbox and sync it with the progress bar and the label.

Posted 29-Jul-17 1:33am

Johny2018

Updated 29-Jul-17 1:44am

v2

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BillWoodruff 29-Jul-17 12:30pm

I do not mean to discourage you, but I think you need to first spend more time studying C# fundamentals, and taking on simpler problems ... so that you build a good foundation for the future.

Need a good book : ask me.

Johny2018 29-Jul-17 13:30pm

yes I have to spend more time on fundementals but u know cause i'm just starting I have a lot of good ideas ( but I can't make any of them ). I just needed this one its critical for me to create this program after this i'm gonna master the fundementals :)

BillWoodruff 29-Jul-17 19:37pm

It's your choice.

2 solutions

Solution 2

See examples here: [progressbar] and here: [SQL Client]

Posted 29-Jul-17 1:44am

RickZeeland

Comments

Johny2018 29-Jul-17 9:08am

thanks.

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OriginalGriff · Accepted Answer · 2017-07-29T01:43:00

Solution 1

The first thing to do is start by converting the number in the textbox into a numeric format that you can work with. For that, use TryParse:

C#

double val;
if (!double.TryParse(myTextBox.Text, out val))
   {
   // It's not a valid floting point number - report a problem to the user instead of continuing.
   ...
   return;
   }

Now you can use the value in val to add up your total.
You "sync" it with the progress bar by setting the bars Value property - by setting the Maximum and Minimum properties to cover the whole range, so your values fit between those.

Saving to a DB is more complex - if you can't cope with a ProgressBar yet, then I'd leave that for a while and consider using something simpler, like a settings file: Using Settings in C#[^]

Posted 29-Jul-17 1:43am

OriginalGriff

Comments

Johny2018 29-Jul-17 8:58am

I read your answer about 10 times and I searched how to add value in total there were some codes but non of them worked. so eventually this is what I have but it's not working :
//int val = 0;

//total = int.Parse(textBox1.Text) + int.Parse(label.Text);

double val;
if (!double.TryParse(textBox1.Text, out val))
{

val = Convert.ToInt32(this.textBox1.Text);
int total = val + label1.Text; // I get error here it says cant implicitly convert type string to int !!!!
}

OriginalGriff 29-Jul-17 10:04am

Look at the code I wrote...not what you imagine I wrote. Pay attention to comments.
If you don't understand the code, look at eth documentation of TryParse - it's all pretty clear.
If you want to enter integers, use int.TryParse instead of double.TryParse.

Johny2018 29-Jul-17 10:45am

ok, so I understand that tryparse is for converting string to int, but i can't understand why u used double ?! and another thing is that i can't find a way to add a number into label. all i have is a form with lbl, btn, txtbox, and in the code area right now its just the code that u gave me (thx). if the first number in label is 0 how can i add another number to it ?! i mean if i add 1 lbl should show me 1 then if i add 2 it should show me 3 and if i add 2 again it should show 5, but all my program does is that show me whatever it's in the txtbox :(

OriginalGriff 29-Jul-17 11:09am

Because I assumed you would be using hours.minutes
If you use an int, then all you can get the user to type is a number of minutes, which may not be convenient. Make sense?

As far as the label goes, think about it. Do you personally add "Water" to "Teabag" to get a drink? Or you you put a teabag in the cup, and add water to it there?
The difference is that strings are "names", "labels" - they aren't numbers. So you can't add two strings together "12" + "42" and get a string that has the sum in: "54" because adding strings together adds the "names" together: "12" + "42" gives you a longer string "1242".
So if you keep your total in a label, you have to parse the label to a number, add the new value to that number, then convert the result back to a string to display it in the label.
It makes sense, really: your home telephone number has two parts: an area code such as "0777" and a local code such as "123456". When you compbine the two to get a whole telephone number you want "0777" + "123456" to give you "0777123456", not "124233". But if you want to add my monthly wages of 777 dollars to your monthly wages of 123456 dollars then you want a number: 124233 dollars.
The type of data you are using affects what results you get, so you have to convert it as necessary to the right data types or you will not get the results you want!

Johny2018 29-Jul-17 11:59am

oh, thank u so much, I understood after reading the first two parts but thx for further examples :) but still I don't know what code should I use :( (stupid me)
my mind is literally blowing up ( English is my second language maybe this is the cause ). It shouldn't be that hard I have a lbl it has nothing in it when u type a number to textbox and hit the btn it should show that num, and when u type another num it should combine those two and just show it in the lbl, like ur example of 12+42 = 54
int val;
if (int.TryParse(textBox1.Text, out val))
{
val++;
label.Text = textBox1.Text;
}
i used int but it keeps showing me whats inside the txtbox.
everything u said makes sense but i can't find out the codes :(
maybe i'll find out tomorrow. anyway thank u so much again for everything u helped a lot.

OriginalGriff 29-Jul-17 12:02pm

textBox1.Text holds the new value as a string.
val holds the new value as a number.
label.Text holds the old value as a string.
You need two numbers to add together. So ... what did you use to convert textBox1.Text to a number? (*Very large hint indeed*)

Johny2018 29-Jul-17 13:16pm

int.TryParse(textbox1.Text, out val))

but the code is like this and my second number should be label.Text and its a string so I convert it to int but it's saying cannot implicitly convert type int to string !!! i'm not converting them theyre both int i'm just adding them together :

int val;
int val2;
if (int.TryParse(textBox1.Text, out val))
{
int.TryParse(label.Text, out val2);
label.Text = val + val2;

}

return;
sorry i'm not getting it :(( it's more annoying for me than u think. it's been about 6-7 hours and i'm still looking for a ... solution my eyes are red and i'm getting a headache I guess. I don't know about there but here its 9:47pm and I don't wanna sleep I just wanna find the solution. thank u again for being so nice and answering my stupid simple questions but I don't know why i'm not understading the right code that I should type. btw i'm using all those codes in private void button1_Click is that the correct place ?!

OriginalGriff 29-Jul-17 14:09pm

int.TryParse(theInputString, out thePlaceToPutTheConvertedValueAndYouDontWantToUseTheSameVariableForBothOfThemReallyDoyou);

Johny2018 29-Jul-17 23:44pm

omg, I did exactly what u said here :

int val;
int v2;
if (int.TryParse(textBox1.Text, out val))
{
//so input string label.Text // v2 is a converted value

int.TryParse(label.Text, out v2); //v2 is another Variable right?!

v2= val + v2; // now it should add val ( int ) v2 ( int ) and show it in v2 ( label.Text ). so why it's showing me nothing ?!!!

}
return;
}

so i'm adding two different Variable together and they are both int but it's not showing anything!!!

here this is my entire program, please take a look and tell me what i'm doing wrong thank u so much :
size : 36kb
https://1drv.ms/u/s!Auo1LzN8HsKXgzv04H6pp89VjbQr

OriginalGriff 30-Jul-17 1:17am

Because v2 holds the result of adding them ... but that doesn't change the value of the label!
Think about it. If you take your mobile phone out of your pocket and upgrade it to new device, it doesn't automatically appear in your pocket. It stays on the shop counter until you pick it up and physically put it away where it belongs.

So yo need to change v2 back to a string, and put that back into the label.

Johny2018 30-Jul-17 3:41am

thank u so much. finally with ur help, found the solution. u r awesome. it so simple now :)

OriginalGriff 30-Jul-17 3:47am

You're welcome!
This stuff isn't difficult - all you have to do is think about it logically.