C# How to check if Textbox doesn't contains string

Question

i need to check if my textbox doesn't contain specific string "Fold". I used to do this like this

if (textbox.Text.Contains("Fold"){}
else { do stuff }

but now i need some alternative of this.

im checking 4-5 things at a time and i will have to do a lot of if statements also there's quite some code if the statement is true and i will have to either make it into new method or copy and paste it .. — kopelence, Dec 19 '15 at 14:49
What is the problem with doing it this way? What else have you tried? — 15ee8f99-57ff-4f92-890c-b56153, Dec 19 '15 at 14:49
thanks adv12 that's what i needed and btw it seems simpler than mine — kopelence, Dec 19 '15 at 14:50
Please explain your problem with full disclosure of your various if statement otherwise you cannot get correct answers — Steve, Dec 19 '15 at 14:50
@Daniil i dont understand do you mean i should check if it the textbox.text!=null and than do things :? — kopelence, Dec 19 '15 at 14:51
already got an answer if (!textbox.Text.Contains("Fold"){ do stuff } — kopelence, Dec 19 '15 at 14:51
@kopelence maybe you find this usefully http://stackoverflow.com/questions/27493541/elvis-operator-and-string-formatter-in-c-6 — Daniil, Dec 19 '15 at 14:52

score 2 · Accepted Answer · answered Dec 19 '15 at 15:40

2

You need to reverse the boolean:

if (!textBox.Text.Contains("Fold")) { ... }

Or you can compare with false as @adv12 said:

if (textBox.Text.Contains("Fold") == false) { ... }

answered Dec 19 '15 at 15:40

kopelence · Answer 2 · 2016-01-09T13:21:55.243

0

Thanks to adv12 i found this piece of code to work perfectly

if (textBox.Text.Contains("Fold")==false)

or

if (!textBox.Text.Contains("Fold"))

edited Jan 09 '16 at 13:21

answered Dec 19 '15 at 14:54

kopelence

This should have been marked `Answer` -You posted first. – Momoro Nov 06 '19 at 03:46

score 0 · Answer 3 · answered Dec 19 '15 at 16:10

0

Please use !textbox.Text.Contains("Fold") the exclamation mark means 'not'.

answered Dec 19 '15 at 16:10

Steve Harris

score 0 · Answer 4 · answered Dec 19 '15 at 19:03

0

You can get in a real time using TextChanged event of the TextBox. Much better way before users submits their result.

answered Dec 19 '15 at 19:03

SH7

score 0 · Answer 5 · answered Feb 23 '19 at 16:30

0

Use if (!textbox.Text.Equals("Fold") = true) {...}

answered Feb 23 '19 at 16:30

InimicalPart

5 Answers5