how can I force user to write chracter such as @

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C#

how can I force user to write chracter such as @ or : in textbox using validating textbox
best regards

Posted 1-Sep-11 0:43am

somur-ruteeb

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RaisKazi 1-Sep-11 6:46am

Do you mean to say, You only want to accept text from user which contains "@" or ":"?.

somur-ruteeb 1-Sep-11 7:12am

yes

RaviRanjanKr 1-Sep-11 6:51am

Not Clear. be more specific while asking question. we need more information.

[no name] 1-Sep-11 6:56am

He probably simply wants to validate a mail address. Instead of 'forcing' users to do anything, we use a regex for that nowadays. The downside is that a foolproof regex for mailaddresses (if that's indeed the purpose) is practically impossible.

RaviRanjanKr 1-Sep-11 7:07am

Might be he is looking for validate a mail address. but I unable to understand is there any use of ':' in email address.

somur-ruteeb 1-Sep-11 7:11am

I need ":" to force paths

RaviRanjanKr 1-Sep-11 7:32am

hmm! OK

somur-ruteeb 1-Sep-11 7:11am

I need ":" to force paths

4 solutions

Solution 2

Here[^] is a very simple article on text box validation.
It should give you enough ideas to start trying to implement a solution for your this problem.

Posted 1-Sep-11 1:02am

Abhinav S

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somur-ruteeb 1-Sep-11 7:09am

this link didn't open

Solution 5

It looks like you're validating an email address, and this is one of the very few times I'd recommend using the RegularExpression object. You can find examples of applying a regular expression to an email address all over google.

Posted 1-Sep-11 1:30am

#realJSOP

v2

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OriginalGriff · Accepted Answer · 2011-09-01T00:54:00

Solution 1

There are two ways to do it: you can handle the TextBox events (TextChanged, and Validating are probably the most use to you) or you could use a MaskedTextBox which will allow you to specify exactly what input you need.

Posted 1-Sep-11 0:54am

OriginalGriff

Comments

somur-ruteeb 1-Sep-11 7:02am

would you please give me an example

Mahmud Mostafa · Accepted Answer · 2011-09-01T01:20:00

Solution 4

Hi,

i think you have to use Regular Expression to validate Textbox (accept string has format meets the regular expression format)

follow this link it may be useful http://www.codeproject.com/KB/recipes/RegexTester.aspx

good luck,

Posted 1-Sep-11 1:20am

Mahmud Mostafa

Updated 1-Sep-11 1:34am

v3

Comments

somur-ruteeb 1-Sep-11 7:22am

would you please give me an example

somur-ruteeb 1-Sep-11 7:29am

this link didn't open

Mahmud Mostafa 1-Sep-11 8:09am

the solution has improved