How to validate if the input contains a valid .Net regular expression?
asp.net, c#, regex, validation
Solution
Make new Regex class out of it. If it throws exception, then it is invalid.
try{
new Regex(expression)
}
catch(ArgumentException ex)
{
// invalid regex
}
// valid regex
I know. Using exceptions for code logic is wrong. But this seems to be only solution.
Problem
I'm building an application that saves named regular expressions into a database. Looks like this: I'm using Asp.Net forms. How can I validate the entered regex? It would like the user to know if the entered regex is not a valid .Net regular expression. The field should reject values like: ``` ^Wrong(R[g[x)]]$ Invalid\Q&\A ```