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POHow do I save an "array of record" to a TMemoryStream (to then store in a sqlite BLOB field)?
 

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  1. POHow do I save an "array of record" to a TMemoryStream (to then store in a sqlite BLOB field)?
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    <p>Ultimately my goal is to be able to save an array of records data structure in a sqlite BLOB field, but in the interim I am trying to serialize an array of records and store it in a TMemoryStream. In case it may be relevant, I am using <a href="http://www.itwriting.com/blog/?page_id=659" rel="nofollow">Tim Anderson's sqlite wrapper</a> (unicode) with Delphi 2010.</p> <p>This is my array of record declaration:</p> <pre><code>type TPerson = array of packed record sCountry: string[50]; sFullName: string[100]; sAddress: string[100]; sCity: string[30]; sEmployer: string[100]; end; var MyPeople : TPerson; </code></pre> <p>And here is the code I am currently using to serialize this array of record to a TMemoryStream. The problem is that it doesn't work:</p> <pre><code>var i : integer; ms : TMemoryStream: ms2 : TMemoryStream; TestPeople : TPerson; sldb : TSQLiteDatabase; begin ms := TMemoryStream.Create; ms2 := TMemoryStream.Create; sldb := TSQLiteDatabase.Create(slDBPath); //sldBPath is a global variable with path to sqlite db try i := Length(MyPeople); ms.Write(i, 4); ms.Write(pointer(MyPeople)^, i * sizeOf(MyPeople)); /// ms2.Read(i, 4); SetLength(ms2, i); ms2.Read(pointer(TestPeople)^, i * sizeOf(TestPeople)); WriteLn('#############' + ms2[0].sFullName); //check if we can read data back sQuery := 'UPDATE PersonDirectory SET fldPersonBlob = ? WHERE id = "' + 42 + '";'; sldb.UpdateBlob(sQuery, ms); finally ms.Free; ms2.Free; sqldb.Free; end; end; </code></pre> <p>Any ideas on either how to generally serialize an array of record to a TMemoryStream, or a better way to store an array of records in a sqlite BLOB field?</p>
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