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POhow to write with a single byte character encoding?
 

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  1. POhow to write with a single byte character encoding?
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    <p>I have a webservice that returns the config file to a low level hardware device. The manufacturer of this device tells me he only supports single byte charactersets for this config file.</p> <p>On <a href="http://en.wikipedia.org/wiki/SBCS" rel="noreferrer">this wiki page</a> I found out that the following should be single byte character sets:</p> <ul> <li>ISO 8859</li> <li>ISO/IEC 646 (I could not find this one <a href="http://msdn.microsoft.com/en-us/library/86hf4sb8" rel="noreferrer">here</a>)</li> <li>various Microsoft/IBM code pages</li> </ul> <p>But when I call Encoding.GetMaxByteCount(1) on these character sets it always returns 2.</p> <p>I also tried various other encodings (for instance IBM437), but GetMaxByteCount also returns 2 for other character sets.</p> <p>The method Endoding.IsSingleByte seems unreliable <a href="http://msdn.microsoft.com/en-us/library/system.text.encoding.issinglebyte" rel="noreferrer">according to this</a></p> <blockquote> <p>You should be careful in what your application does with the value for IsSingleByte. An assumption of how an Encoding will proceed may still be wrong. For example, Windows-1252 has a value of true for Encoding.IsSingleByte, but Encoding.GetMaxByteCount(1) returns 2. This is because the method considers potential leftover surrogates from a previous decoder operation.</p> </blockquote> <p>Also the method Encoding.GetMaxByteCount has some of the same issues <a href="http://msdn.microsoft.com/en-us/library/system.text.encoding.getmaxbytecount#Y1128" rel="noreferrer">according to this</a></p> <blockquote> <p>Note that GetMaxByteCount considers potential leftover surrogates from a previous decoder operation. Because of the decoder, passing a value of 1 to the method retrieves 2 for a single-byte encoding, such as ASCII. Your application should use the IsSingleByte property if this information is necessary.</p> </blockquote> <p>Because of this I am not sure anymore on what to use.</p> <p><a href="http://www.joelonsoftware.com/articles/Unicode.html" rel="noreferrer">Further reading</a>.</p>
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    1. USsjors miltenburg
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      1. VTUpMod
    2. VO
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    1. COSo just ignore MaxByteCount and use ASCII or any of those codepages.
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      1. POhow to write with a single byte character encoding?
      1. USHenk Holterman
    2. COSo... avoid handing the encoding strings that you've received from a previous encoder that might have produced leftover surrogates.
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      1. USDamien_The_Unbeliever
 

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