TMemoryStream file format

[jamie]

If this is not school project then a short string should used write the record once as a whole.

[wp]

Again (the last time): the string characters are NOT embedded in the record, the record contains only a pointer to the characters somewhere in memory. What you describe is an array of chars with terminating null. This is not a dynamic Pascal string as used here.

[jcmontherock]

I give you the project.

[rvk]

I give you the project.

And what is the problem?

Did you read the other posts? If you use AnsiString then your sName is NOT saved to the file.
We even showed you the calculation for it.

The solution was also given (use string[255] or ShortString, which isn't a pointer but a stringarray which will be saved).

[wp]

OK, maybe you do not understand what rvk and I were trying to explain. Therefore I fixed your demo to work. I marked all lines changed by my initials.

The code stores only the non-string elements of the record - this is easy when the string is moved to the end of the record definition, and the size of the string (the size of a pointer) is subtracted from the size of the record. Then the string is saved separately by calling ClearString.WriteAnsiString.

Reading is similar.

Alternatively you could declare the string sName as String[255] because this kind of string is NO pointer and has its characters inside the record. But because now even for an empty string 255 bytes are occupied in the file I prefer the other solution.

[jcmontherock]

OK, thenks a lot to everybody...