how to check this values in a textbox?

binary value in a textbox

hexadecimal value in a textbox

octal value in a textbox

decimal value in a textbox

it would display invalid input if none of those exist:confused:

Check out the following functions:

Hex
Oct

Rather than checking specific types, wouldn't it be easier to simply ensure the textbox would not accept alpha characters?

Ohhhhh.. sorry!!

I thought I was in the VB.NET forum. :(

Quote:

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Originally Posted by Hack

Rather than checking specific types, wouldn't it be easier to simply ensure the textbox would not accept alpha characters?

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Opting out alpha characters would be wrong.

e.g.
B1C24 is a valid Hexadecimal value, but contains alpha characters.

A better method is to create a function. In the function try to convert the value. If you get an error, that means it can not be converted, so return false. Otherwise return true.

Pradeep :)