Which kind of logic to do?

Mfwamba Tshimanga

Hi!

I need to understand one logic.
I have four txtboxes (txtbx1, txtbx2, txtbx3 and txtbx4) that should enter any decimal. But I have two caracters "-" and ".."
What I need? I need to see appearing in the textbox4 the number "0" (ONLY when this two numbers "-" and ".." are inserted).

see what I try to do but its doesnt make sense:

private void txtDec1_1_mensal_TextChanged(object sender, EventArgs e)

{

if txtbx1.Text 'and ' txtbx2.Text 'and' txtbx3.Text = '-' then txtbx4.Text = '0';

}

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Accepted answer
If you do it like this, then if txtbox2 (or any other textbox) contains something that isn't a number (such as .. or - ), then 0 will be substituted:

decimal d1, d2, d3, d4;
decimal.TryParse(txtbox1.Text, out d1);
decimal.TryParse(txtbox2.Text, out d2);
decimal.TryParse(txtbox3.Text, out d3);
d4 = d1 + d2 + d3;
txtbox4.Text = d4.ToString();
Mfwamba Tshimanga12y ago
No comment! This is the way I can learn to help also the futurs developers one day...
Mfwamba Tshimanga12y ago
Let explain easly how its should work:

txtbox1 | txtbox2 | txtbox3 | txtbox4
25,00 .. or - 12,05 ? // the result should appear here

Then on this form what I need?
Each insertion should make addition operation number (for example: 25,00 + 12,05 = 37,05).
But there is one problem. It's impossible to make operation with this symbole ".." and "-"

What I need?
Even in one of the txtboxs I insert one of this symbole (".." or "-"). Its should considere its as "0". Means 25,00 + .. + 12,05 = 37,05 or 25,00 + - + 12,05 = 37,05

In conclusao, not matter if I insert theses symbol. Even inserted Its should be considered as "0". That all.

Thanx.
Wim Sturkenboom12y ago
Can you give some sample data that you would enter and what you expect as the output in the fourth textbox?

tb1: 4
tb2: 3
tb3: ..
tb4: ???

tb1: 4
tb2: 3
tb3: 99
tb4: ???

And a few more.
Mfwamba Tshimanga12y ago
My preocupation is complex??? If yes can I explain it in other way?
Mfwamba Tshimanga12y ago
Please I need some help yours...