How do I search for a char in a string using the Contains method.

[Fuzz13]

I am trying to run a test that will examine a selected file for illegal characters. It needs to test each read line before it fails or completes. I have this:

string[] lines = File.ReadAllLines(@newobject.csvDirectory);

string[] illegal = { "/", "*", "\\", "|", 
":", "\"", "?", "<", ">" };
            

                       
// Return an error for file with illegal characters
for (int i = 0; i < lines.Length; i++)
{
                        
if (lines[i].Contains(illegal[]))
{
newobject.illegalError();
}

in this line of code

if (lines[i].Contains(illegal[]))

I need it to search lines[i] for every declared char in the illegal array.

Thanks for our help with this.

[Christian Binder]

You have to iterate over each element of you char-array and do a check.

Also you could use string's IndexOfAny-method, which takes a char-array and returns the index of any match.

[Fuzz13]

If I understand what indexofany does I like that as my option but I've never used it and don't understand how to impliment it in my code from reading msdn's examples. Any chance you could give me an idea of what it would look like?

[brunoss]

The first thing you have to do is to turn your array to a char array because you are seaching for a char not for a string. then do the following

if(lines[i].IndexOfAny(illegal) != -1)
//in this condition lines[i] has illegal chars