TRichView.com

Hi all,
I'm evaluating this software and have come accross an issue:
RichViewEdit.LoadRVFFromStream Fails (returns false)

I basically loaded the RichViewActions Demo into a project, completely unchanged. I added a procedure called StartUp tha happens after formCreate but before formShow
I also made sure that the RichViewEdit1's rvfoSaveTextStyles, rvfoSaveParaStyles are true
Here's the code:

procedure TFormRVF_FieldEdit.Startup(Sender: TObject;var zCurrent:WideString);
var zStream:TStringStream;
begin
if zCurrent<>'' then
begin
zResult_RVF:=zCurrent;
zStream:=TStringStream.Create(zCurrent);
zStream.Position := 0;
RichViewEdit1.Clear;
if not RichViewEdit1.LoadRVFFromStream(zStream) then
ShowMessage('load failed');//it always fails
RichViewEdit1.Format;
zStream.Free;
end;

Anything, I need to add, or is there some setting in the RichViewActions Demo theat would prevent loadinf rvf from a stream?

Well, I think your stream is utterly empty when you try to load from it, so the failure feels like normal behavior. Opening a zero-size file would likely produce similar results (in just about anything other than Notepad).
Michel

No, the stream is not empty. On the line :

zStream:=TStringStream.Create(zCurrent);

-it is loading the value of zCurrent parameter into the StringStream, In the debugger I checked to make sure that the stream is not empty. It isn't, so that's not the problem.

Right you are, I haven't noticed, sorry!

mgkrebbs wrote:Hi all,
if zCurrent<>'' then
begin
zResult_RVF:=zCurrent;
zStream:=TStringStream.Create(zCurrent);
zStream.Position := 0;
RichViewEdit1.Clear;
if not RichViewEdit1.LoadRVFFromStream(zStream) then
ShowMessage('load failed');//it always fails
RichViewEdit1.Format;
zStream.Free;
end;

What is zCurrent?
Does it start with "-8 1", etc. ?

See RVF Specification in help

Good question.
I created the file in the exact same RichView Edit, so I don't know why the load from stream fails. Loading it from file works, and the stream's text looks exactly like the file does when I view it in Notepad.

Here's the value of zCurrent from the debugger:

'-8 1 3'#$D#$A'-7 0 -1 0 0 0 0 536870911'#$D#$A'-9 2 0 0 2 0 1'#$D#$A'RVStyle1'#$D#$A'î'#2#0#0'-9 2 0 0 2 0 2'#$D#$A'RVStyle1'#$D#$A'K'#0#0#0'-9 2 0 0 2 0 4'#$D#$A'RVStyle1'#$D#$A'—'#8#0#0'-9 2 0 0 2 0 3'#$D#$A#$D#$A'!'#0#0#0#0#0#0#0#$19#0#0#0#5#0#0#0#5#0#0#0#5#0#0#0#5#0#0#0#0#0#0#0#0#0#0#0#0'0 1 0 0 0 0'#$D#$A'This is a '#$D#$A'1 1 -1 1 0 0'#$D#$A'test.'#$D#$A'0 1 -1 1 0 0'#$D#$A' '#$D#$A'2 1 -1 1 0 0'#$D#$A'Should be underlined.'#$D#$A'0 1 -1 1 0 0'#$D#$A' '#$D#$A'3 1 -1 1 0 0'#$D#$A'This sentence only is in Times New Roman.'#$D#$A'0 1 -1 1 0 0'#$D#$A' This in Arial. '#$D#$A'4 1 -1 1 0 0'#$D#$A'This is 12-point.'#$D#$A'0 1 -1 1 0 0'#$D#$A' Please visit '#$D#$A'5 1 -1 1 0 "http://www.msn.com"'#$D#$A'MSN'#$D#$A'0 1 -1 1 0 0'#$D#$A' to read some stuff.'#$D#$A'-11 0 0 0 0 0 0 0 1 0'#$D#$A'0 1 -1 1 0 0'#$D#$A'Bullet 1'#$D#$A'-11 0 0 0 0 0 0 0 1 0'#$D#$A'0 1 -1 1 0 0'#$D#$A'Bullet 2'#$D#$A'-11 0 0 0 0 0 1 0 1 0'#$D#$A'0 1 -1 1 0 0'#$D#$A'Item 1'#$D#$A'-11 0 0 0 0 0 1 0 1 0'#$D#$A'0 1 -1 1 0 0'#$D#$A'Item 2'#$D#$A'0 2 1 0 0 0'#$D#$A'This paragraph has been indented.'#$D#$A'It sure has.'#$D#$A'0 1 0 0 0 0'#$D#$A'OK, back to normal.'#$D#$A'7 1 0 0 0 0'#$D#$A'Strikeout!!!!!'#$D#$A'0 1 0 0 0 0'#$D#$A#$D#$A

I figured out the the problem is in passing it through a TStringStream or a WideString. I loaded it directly to and from a TMemoryStream , and it works fine. If I figure out which one it was, I'll post here. Thanks to everyone for your suggestions.

mgkrebbs wrote:I figured out the the problem is in passing it through a TStringStream or a WideString. I loaded it directly to and from a TMemoryStream , and it works fine. If I figure out which one it was, I'll post here. Thanks to everyone for your suggestions.

That's right.
RVF is a binary format, not text format, so using TMemoryStream (not TStringStream) will be correct.

Yes, TStringStream cannot be used to store RVF data, because it "normalizes" line breaks and damages binary data.