NOOB VB.Net questions

[tezzal]

Hi all. Sorry my 1st post is a couple of VB questions. I hope its OK.

I need a box (textbox1) that I put a number in say 100 then when I click button1 the number is decreased, but textbox1 still shows the original number. Then a progressbar (progressbar1) needs to go up by the % of diff between textbox1 and the number of clicks. I.e. say TB1 is 100 and I click it 3 times it still show 100 in TB1 but the progress bar has gone up by 3%.

I can’t seem to work out where to put the number in textbox1 so that it stays the same number (100) on screen but lets me take the value i entered in it and reduce it each time I click the button.

My other question is how do I make a carridge retun in a textbox. I know its a key event but cant seem to get it to work.

TIA

Terry

[vass0922]

the spam should go away soon

Welcome to TechIMO

There are two ways to hold the number you need!
1. Cleanest and suggested method - Use a variable, for your purpose an Integer variable will work fine
2. Use a second textbox but HIDE it in the properties
When you click the decrement button, if there is currently no value in iVar1 (the integer variable) then assign it the value of textbox1. Then decrement. If there is already a value then just decrement the existing value.. the progress bar can use this value

BUT what you'll have to figure out (I'm assuming this is for class) is how do you make a variable hold its value when you leave the scope of the function.

[Russian Wall]

Welcome to TechIMO!

Both what vass suggested would work. It is not smart to read a value directly out of a normal textbox that is not read-only, so you need to use a variable or a non-user text box like Vass suggested.

Assuming your text box is already set up, it might look something like this:
In psuedocode (this won't run, it is just to get the idea, and you have to interpret it to VB):

class clicksProgress{
int clicks;
int boxNumber;

void textboxUpdateEvent(){
boxNumber = system::convert::toInt16(textbox->text);
//If this is not a number, you will need to catch errors here too
updateProgressBar();
}

void clickEvent(){
clicks++;
updateProgressBar();
}

void updateProgressBar(){
//I don't know any of the functions for progress bar, sorry just set it here...
progressbarStatus = clicks/boxNumber;
}
Hope that helps!


What are you trying to do with the carriage return? Let somebody type it in, or display something with a CR in it? You can just put it in the textbox by using something like
textbox->text = System::String("The n is a windows endline CR + LF \n");
If you are trying to capture it, it might help to know carriage return is ascii number 13.

[vass0922]

make sure to set the textbox as multiline too

[tezzal]

Thanks guys I'll try those and get back to you.

The CR one is a barcode scanner. I set focus to a text box then when I scan a code the CR is sent by the scanner and does a load more stuff like populate a database read values from a database etc. I have it working no problems in PHP as a web solution but need a simple VB app as well.
Thanks again.