Wait event inside a loop cycle in VB.NET

[Nightfarer]

Hello.

I have this loop started by a button Click event:

 For i = 0 To AlphabetArray.GetUpperBound(0)
            AlphabetArray.SetValue(letter, i)
            Alphabet.Lettertxtbox.Clear()
        Next i
 

The loop must wait another Click event (preceeded by a user passed value (letter) in a textbox) to continue; actually the loop assigns the same letter to all array length.
It's the first time I develop a user driven software (all the previous were fully automated ones) so I'm having a probably such silly issue but I can't figure it out how to manage the wait.

Thanks in advance,
Luca

[Shashi Sadasivan]

Hello.

I have this loop started by a button Click event:

 For i = 0 To AlphabetArray.GetUpperBound(0)
            AlphabetArray.SetValue(letter, i)
            Alphabet.Lettertxtbox.Clear()
        Next i
 

The loop must wait another Click event (preceeded by a user passed value (letter) in a textbox) to continue; actually the loop assigns the same letter to all array length.
It's the first time I develop a user driven software (all the previous were fully automated ones) so I'm having a probably such silly issue but I can't figure it out how to manage the wait.

Thanks in advance,
Luca

bool clicked = false
 
SUB start //the one that handles button clicks
clicked = !clicked
if(clicked == true)
{
For i = 0 To AlphabetArray.GetUpperBound(0)
            AlphabetArray.SetValue(letter, i)
            Alphabet.Lettertxtbox.Clear()
        Next i
}
 
SUB end
 

Sorry abt the miix of Vb and C#, hope you know where i come from.
cheers

[Nightfarer]

bool clicked = false
 
SUB start //the one that handles button clicks
clicked = !clicked
if(clicked == true)
{
For i = 0 To AlphabetArray.GetUpperBound(0)
            AlphabetArray.SetValue(letter, i)
            Alphabet.Lettertxtbox.Clear()
        Next i
}
 
SUB end
 

Hi.

I rewrote it this way:

In a module: Public clicked as Boolean

clicked=(Not clicked)
 
If clicked.Equals(clicked) Then
For i = 0 To AlphabetArray.GetUpperBound(0)
AlphabetArray.SetValue(letter, i)
Alphabet.Lettertxtbox.Clear()
Next i
End If
 

But it behaves the same way as before: AddNew button is active only if textbox.text is <> ""; click AddNew button; loop starts and value added via textbox is added to all array length (confirmed using MessageBox to get values of array).
The loop must work this way:
ArrayCreated[...],[...],[...],etc...
AddNew button inactive until textbox text is ""
AddNew button click
Loop starts and set value passed via textbox to array: Array[a],[...],[...], etc...
textbox text cleared
AddNew button inactive until textbox text is ""
loop waits
user types new value in textbox
AddNew button click
loop restarts: new value typed is added to Array[a],[b],[...],etc...
loop waits
user types new value in textbox
AddNew button click
loop restarts: new value typed is added to Array[a],[b],[c],etc...
this until i=Array.GetUpperBound(0)
when i = array.getupperound(0)
AddNew button and textbox inactive
Another button active to proceed

Hope it's clear.
Luca

[Plater]

Why not have the array created before hand?

Create array of correct size.
Create a pointer to the first index of the array.
i.e.

char myarray[]=new char[26];
int myaptr=0;
 

Then when the textbox contains text, allow a button click.
On button click:

myarray[myaptr]=(whatever the character value is);
myaptr++;
 

You will of course want to make sure they don't go over the bounds of the array (in my example: 26)

[Nightfarer]

Why not have the array created before hand?

Hi, I simplified the loop just to let understand; the array in created when this form loads and has not a fixed size but the size is passed by the user (the software does and handles more than this - it's just the only thing I never figured out up-to-now).

Anyway I'm still stuck at the wait handle inside loop.
It's the first time I develop a user-driven software so there are things I never used before (like this waiting-event-passed-by-user loop).

[Shashi Sadasivan]

i come from a very c# 'ish background but this part of VB i can definitely understand (which you converted)

If clicked.Equals(clicked) Then

wont this always evaluate to true? :)

cheers

[Nightfarer]

i come from a very c# 'ish background but this part of VB i can definitely understand (which you converted)

If clicked.Equals(clicked) Then

wont this always evaluate to true? :)

cheers

Hi.

But it refers to

if( clicked == true). The == operator is equals... anyway you're right, I made in mistake rewriting from C# to VB on that line (I caught it later because in the meantime I added other functionalities and rewrote other functions and subroutines), but changing it still doesn't solve my silly issue.

[Nightfarer]

but changing it still doesn't solve my silly issue.

Finally done, now it fully works as expected.

[Shashi Sadasivan]

I hope it wasnt a silly error... :D
Cheers

[Nightfarer]

I hope it wasnt a silly error... :D
Cheers

Not so much silly (I rewrote some routines but not the loop itself), but I meant silly because it should be normal for developers to handle the user input while I never had the need because of other type of software I always developed.