delphi – 在TRichEdit中加载长RTF文本不起作用

{rtf1ansiansicpg1252deff0...

怎么了？

procedure TForm1.Button1Click(Sender: TObject);
var
    RtfText: string;
    Stream: TStringStream;
begin
    RtfText := GenerateRtfText();

    Stream := TStringStream.Create(RtfText);
    try
        RichEdit2.PlainText := False;
        RichEdit2.Lines.LoadFromStream(Stream); //<--- ERROR: RichEdit displays raw RTF-Code
                                                //     if RtfText is too long
        if StartsText('{rtf',RichEdit2.Lines.Text) then
        begin
            ShowMessage('Oh no,not converted!');
            //WORKAROUND: 2nd try seems to work...
            //Stream.Position := 0;
            //RichEdit2.Lines.LoadFromStream(Stream);
        end;
    finally
        Stream.Free;
    end;
end;

例如,具有以下RTF生成功能：

function TForm1.GenerateRtfText: string;
var
    I: Integer;
    Stream: TStringStream;
const
    DOES_WORK_COUNT = 10000;
    DOES_NOT_WORK_COUNT = 15000;
begin
    //Fill
    RichEdit1.Lines.BeginUpdate;
    try
        //for I := 0 to DOES_WORK_COUNT do
        for I := 0 to DOES_NOT_WORK_COUNT do
          RichEdit1.Lines.Add(IntToStr(I));
    finally
        RichEdit1.Lines.EndUpdate;
    end;
    //Convert to RTF
    Stream := TStringStream.Create;
    try
        RichEdit1.Lines.SaveToStream(Stream);
        Result := Stream.DataString;
    finally
        Stream.Free;
    end;
end;

编辑：即使复制和粘贴无法正常工作：

这就是我做的：

>我将生成的RichEdit1内容(行号1..15000,数字1..15000)复制到notpad.exe中以删除任何RTF
>我将记事本的内容复制到RichEdit2中

结果：

>只能正确显示12773行.最后一行只有12
>如果我尝试在TRichEdit中添加另一个char,则没有任何反应
>如果我删除10个字符(每个退格键),我之后可以添加10个字符…

TRichEdit是否有隐藏的字符限制？