VB.NET - string of nulls

I have a string value read in from a CSV file. The CSV file contains 7 NULL bytes, I have confirmed this by opening it in a hex editor and sure enought there are 7 0x0 bytes in there. This string is causing me pain.

In vb.net when I check the strlen of this string it returns a value of 7 and if i do a String.IsNullOrWhitespace it returns false.

I cannot understand why this is? I have split the string into a byte array and each byte is 0x0, which is null/nothing. A string = Nothing comparison also fails.

I want to be able to replace this string with a string of my own but I cannot do this dynamically. Any suggestions why this string returns a length of 7 even though each byte is 0x0?

Solution

The Null character is not whitespace, and your string reference is not Nothing, so I would expect String.IsNullOrWhitespace() to return false

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