Length Cannot be zero vb.net

Question

Hi is there away to detect the length of a byte before I get the error message:

Length cannot be less than zero. Parameter name: length

I get the error on this line:

new_username = new_username.Substring(0, new_username.IndexOf(" Joined "))

I am removing the "joined" from the string I get....how can I ignore it is "joined" isnt the the data?

Thanks

Answer 1

Try this:

new_username = new_Username.Replace(" Joined ", "")

Be warned that this will remove all occurrences of the " Joined " substring rather than just the first.

Answer 2

It looks like new_username.IndexOf(" Joined ") is returning -1 meaning the string " Joined" was not found by Substring. I would break this out into two statements:

The error you are seeing is that you are effectively making this call:

new_username = new_username.Substring(0, -1)

Answer 3

I would test to see what IndexOf returned before using it in this context:

if(new_username.IndexOf(" Joined") > 0)
{
      new_username = new_username.Substring(0, new_username.IndexOf(" Joined "))
}