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copied!<p>What you're seeing probably aren't null characters. They're probably just the upper eight bits of a character with a code-point value less than 256.</p> <p>If you really do have null characters in your string that aren't supposed to be there, the first thing you should do is figure out how they're getting there. There's probably a bug in your program if they're there when they shouldn't be.</p> <p>If the code that generates the string is bug-free and you still have unwanted null characters, then you can remove them fairly easily. The common way to remove stuff from a string is with the <a href="http://docwiki.embarcadero.com/VCL/en/System.Delete" rel="noreferrer"><code>Delete</code></a> standard function. You can specify any character by its numeric value with the <code>#</code> syntax, and the compiler can usually figure out whether it needs to represent an AnsiChar or a WideChar.</p> <pre><code>procedure RemoveNullCharacters(var s: WideString); var i: Integer; begin i := 1; while i < Length(s) do if s[i] = #0 then Delete(s, i, 1) else Inc(i); end; </code></pre> <p>But that may re-allocate the string many times (once for each null character). To avoid that, you can pack the string in-place:</p> <pre><code>procedure RemoveNullCharacters(var s: WideString); var i, j: Integer; begin j := 0; for i := 1 to Length(s) do if s[i] <> #0 then begin Inc(j); s[j] := s[i]; end; if j < Length(s) then SetLength(s, j); end; </code></pre> <p>Those functions will work for any of Delphi's string types; just change the parameter type.</p>

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