Textbox

Question

I have a textbox on a web form that I have the follow java code to enable a button only when the tilde key is entered. The problem I have is I cannot enter the \ or the ] keys without causing an error in the code logic. Here is the java code if (/^[a-zA-Z0-9- `!@#$%^&*()_+-={}|:"'?><?|\[]*$/.test(str) == false) {. My second question is there a way to do this in the code behind?

Thanks in advance,

Kevin

ramya bharath · Answer

Instead of [ you have to give as \[ give it after ? Since it may overlao with \ validation

Kevin Gilmore · Answer

Back to my second question. If I do this in the code behind does that prevent someone from viewing my source code and figuring out what key codes to use to enable the buttons? Thanks,

Kevin Gilmore · Answer

Thanks. I have the \ key working but I cannot get the ] key. Here is what I have now if (/^[a-zA-Z0-9- `!@#$%^&*()_+-={}|:"'?> Thanks

ramya bharath · Answer

you have to provide a escape sequence for these characters exampke if its \ then give it as \ For matching special characters u can also use \ W representation you can also regular expression validator to perform the same operation In server code if you want to handle u can call server side code on change events but this is unnecessary as enabling a button is a simple step which doesn't need a server call

Textbox

Answers (4)