[fpc-pascal] ftGuid displaytext & output

[Ludo Brands]

> While trying to export dataset data to XML, I use this for 
> ftGUID fields:
> 
>         FNode := 
> Foutputdoc.CreateTextNode(Utf8decode(GUIDToString(TGuid(EF.Fie
> ld.Value))));
> 
> This works on Windows 32 and shows a hex representation of 
> the GUID, like {00000000-0000-0000-C000-000000000046}
> 
> On Linux x64, I get: "Illegal type conversion: "Variant" to "TGuid""
> 
> I then tried something like:
>         FNode := 
> Foutputdoc.CreateTextNode(Utf8decode(EF.Field.DisplayText));
> However, this just output the GUID as a number (e.g. 42)
> 
> 1. Is the conversion error I got due to the use of a 64 bit 
> compiler? How can I fix it? (e.g. use EF.Field.AsLargeint - 
> but that has 64 bits, not the the 128 bits present in a GUID)
> 
> 2. Is the behaviour of .DisplayText correct for ftGUID 
> variables - shouldn't it use GUIDToString to output the hex value?
> 
> Thanks,
> Reinier

TGuidField stores guid in the string format (GuidToString).
EF.Field.AsString should give you the correct string value.

Ludo