GetInvalidFileNameChars or part of the loop erroring

John Riker

I have a variable with a path to a file I want to save and want to strip out any invalid characters that would cause the save or later move to fail. It worked fine for a batch but now failing again. I was going to remove the characters but for now just put a space in there. So here's an example:

foreach (char c in System.IO.Path.GetInvalidFileNameChars())
{
item.Snippet.Title = item.Snippet.Title.Remove(c, ' ');
}

So it's erroring on line 3 above wit error:

Unhandled Exception: System.ArgumentOutOfRangeException: Index and count must refer to a location within the string.

Parameter name: count

at System.String.Remove(Int32 startIndex, Int32 count)

at ShowWebsiteDownloader.Program.Main() in C:\Users\syarbrou.ICEO\source\repos\ShowWebsiteDownloader\ShowWebsiteDownloader\Program.cs:line 278

At the start of that loop item.Snippet.Title contains:

Disney Fort Wilderness Halloween Staycation Check In Day! | Cabin Tour, Holiday Decorations & BBQ!

Thoughts what's going on?

4 Replies

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Jignesh Kumar5y ago
Hi John,

Please refer this link where you will find same example, As Amit told use replace instead of remove function which will serve your purpose.
https://stackoverflow.com/questions/146134/how-to-remove-illegal-characters-from-path-and-filenames
Sachin Singh5y ago
yes +1 from my side to @Amit sir, why don't you simply use Replace method instead of Remove.
Amit Gupta5y ago
Why don't make it simpler using Replace function
foreach (char c in System.IO.Path.GetInvalidFileNameChars())
   {
      item.Snippet.Title = item.Snippet.Title.Replace(c, ' ');
   }
Sachin Singh5y ago
String.Remove method takes start index,Count as argument

you will get Argument out of Range exception when Either startIndex or count is less than zero.

Consider below example
string name = "Michelle Violet Banks";



Console.WriteLine("The entire name is '{0}'", name);



// remove the middle name, identified by finding the spaces in the middle of the name...

int foundS1 = name.IndexOf(" ");

int foundS2 = name.IndexOf(" ", foundS1 + 1);



if (foundS1 != foundS2 && foundS1 >= 0) {



name = name.Remove(foundS1 + 1, foundS2 - foundS1);