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POWriting strings to TMemoryStream
 

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    <p>I have read alot of discussions on here regarding writing strings to a TMemoryStream and saving to file and reading the strings back in to TMemoryStream</p> <p>I dont know what I have done wrong here, but either my SaveData or my LoadData is wrong. I can check the value of Title before I call SaveData and it holds what I expect. However, when I call LoadData and check the value of Title, it is garbage. Can anyone tell me what I have done wrong please</p> <pre><code>procedure SaveData(FileName: TFileName); var MemStr: TMemoryStream; Title: String; begin MemStr:= TMemoryStream.Create; try MemStr.Seek(0, soFromBeginning); WriteStreamStr( MemStr, TItle ); MemStr.SaveToFile(FileName); finally MemStr.Free; end; end; procedure LoadData(FileName: TFileName); var MemStr: TMemoryStream; Title: String; begin MemStr:= TMemoryStream.Create; try MemStr.LoadFromFile(FileName); MemStr.Seek(0, soFromBeginning); Title := ReadStreamStr( MemStr ); finally MemStr.Free; end; end; procedure WriteStreamInt(Stream : TStream; Num : integer); {writes an integer to the stream} begin Stream.WriteBuffer(Num, SizeOf(Integer)); end; procedure WriteStreamStr(Stream : TStream; Str : string); {writes a string to the stream} var StrLen : integer; begin {get length of string} StrLen := Length(Str); {write length of string} WriteStreamInt(Stream, StrLen); if StrLen &gt; 0 then {write characters} Stream.Write(Str[1], StrLen); end; function ReadStreamInt(Stream : TStream) : integer; {returns an integer from stream} begin Stream.ReadBuffer(Result, SizeOf(Integer)); end; function ReadStreamStr(Stream : TStream) : string; {returns a string from the stream} var LenStr : integer; begin Result := ''; {get length of string} LenStr := ReadStreamInt(Stream); {set string to get memory} SetLength(Result, LenStr); {read characters} Stream.Read(Result[1], LenStr); end; </code></pre>
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    1. USJakeSays
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      1. VTUpMod
    1. COWhy don't you give a try to `TStringStream` ?
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      1. USTLama
    2. COOr give TStringList.SaveToFile / LoadFromFile a try ?
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      1. USiamjoosy
    3. COYes, all the code seems pointless given that `TStrings` has `SaveToStream` and `LoadFromStream`. And if that's not a perfect fit for the real application, then the reader/writer classes will do the job.
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      1. USDavid Heffernan
 

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