Delphi Error Is Not A Valid Floating Point Value
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Is Not A Valid Floating Point Value Error
down vote favorite 2 I have a spanish user who is getting an invalid floating point error when doing this var S : String; R : Real; begin S := '3.12345'; R := StrToFloat(S); //- Exception here. The reason for this is that his location uses , for the decimal place! How can I safely convert the string above to a float for the user without it bombing out. string strtofloat delphi delphi floating-point share|improve this question edited May 16 '12 at 19:21 mskfisher 1,94022036 asked May 1 '11 at 21:46 Wizzard 3,64294581 Do you know (that is, at the time the program is run) the national settings used in the string? –Andreas Rejbrand May 1 '11 at 21:49 Yes, I do (reason for it being a string is it's an API response). –Wizzard May 1 '11 at 22:32 Why do you store a float into a string? Strings are the wrong datatype to store numbers. –user160694 May 2 '11 at 7:12 1 What API is so stupid to return a float into a string? –user160694 May 2 '11 at 7:41 add a comment| 4 Answers 4 active oldest votes up vote 11 down vote accepted Roll your own version of StrToFloat function StrToFloat_UK(const AStr: string): Float; var FS: TFormatSettings; begin FS.Create('en-UK'); Result:= StrToFloat(AStr, FS): end; And use this in place of StrToFloat. share|improve this answer edited May 1 '11 at 22:07 answered May 1 '11 at 22:01 Johan 48.7k16105201 Now I have absolutely no idea what you are doing. TFormatSettings is a record, you know that, right? –Andreas Rejbrand May 1 '11 at 22:03 2 From the embarcade
: Extended; Description The strtofloat function converts a number string, FloatString such as '123.456' into an Extended floating point delphi string to double number. It supports integer, floating point, and scientific (exponent)
Delphi String To Float
formats. If a decimal point appears in FloatString, then it must match the current
9.0 Is Not A Valid Floating Point Value Quickbooks
DecimalSeparator value. Version 2 of this function is for use within threads. You furnish the FormatSettings record before invoking the call. It takes a http://stackoverflow.com/questions/5851647/x-xxxx-is-not-a-valid-floating-point-converting-between-languages-locals local copy of global formatting variables that make the routine thread safe. Notes The EConvertError exception is thrown if there are errors in FloatString, such as trailing blanks or invalid decimal characters. Related commands Extended The floating point type with the highest capacity and precision FloatToStr Convert a floating http://www.delphibasics.co.uk/RTL.asp?Name=strtofloat point value to a string FloatToStrF Convert a floating point value to a string with formatting TFormatSettings A record for holding locale values for thread-safe functions Author links Buy Website Traffic at Buywebsitetrafficexperts.com Buy Proxies atBuyproxies.io Download this web site as a Windows program. Example code : Converting a scientific format number string var stringValue : string; floatValue: Extended; begin// Set up the source string containing a number representation stringValue := '123.456E+002'; // Convert it to a floating point number floatValue:= strtofloat(stringValue); // And display the value ShowMessage(stringValue+' = '+FloatToStr(floatValue)); end; Show full unit code 123.456E+002 = 12345.6 Example code : Catching string conversion errors var A : Extended; begin// We will catch conversion errors tryA := strtofloat('10 E 2');// Middle blanks are not supported except on Exception : EConvertError do ShowMessage(Exception.Message); end; tryA := strtofloat('$FF');// Hexadecimal values are not supported except on Exception : EC
Show Posts Tag Search Advanced Search Go to Page... Thread Tools Display Modes #1 06-27-2006, 08:17 PM http://www.delphipages.com/forum/showthread.php?t=166851 coersum Junior Member Join Date: Dec 2004 Posts: 27 not a valid floating point value Hi, I have been trying to fix a problem I am having http://clubdelpra.cluster003.ovh.net/foros/showthread.php?t=81515 with my program. When I use it on my pc, I have no problem (even if I change the regional variables). I have added a big set of is not variables to the form create to make sure it uses the variables I have here: CurrencyFormat := 0; NegCurrFormat := 0; ThousandSeparator := ','; CurrencyDecimals := 2; DecimalSeparator := '.'; DateSeparator := '/'; ShortDateFormat := 'M/d/yyyy'; LongDateFormat := 'dddd, MMMM dd, yyyy'; TimeSeparator := ':'; TimeAMString := 'AM'; TimeAMString := 'PM'; ShortTimeFormat := 'h:mm AMPM'; LongTimeFormat is not a := 'h:mm:ss AMPM'; But somehow on some of my client's computer, they still get the error "'0.16664352' is not a valid floating point value". This error most likely happen when I try to strtofloat() the value, but I would think the DecimalSeparator variable set to '.' (dot) would fix that. Am I missing something ? Ex of one of my lines: RList.Cells[0,1] := formatdatetime('mm/dd/yy hh:nn', now+StrToFloat(TimeDiff.text))+'GMT'; // TimeDiff.text contains the variable 0.16664352 for this example That variable is used to detect and log the difference between one datetime to another and is calulated by: DTime1 := strtodatetime(Formatdatetime('mm/dd/yyyy HH:mm:ss', strtodatetime('06/22/06+' '+'20:30:42'))); DTime2 := strtodatetime(Formatdatetime('mm/dd/yyyy HH:mm:ss', now)); Result := FloatToStr(DTime1 - DTime2); //this is saved in TimeDiff.text Thank you for any help. coersum View Public Profile Send a private message to coersum Visit coersum's homepage! Find all posts by coersum #2 06-27-2006, 11:55 PM questo Member Join Date: Nov 2005 Posts: 85 RE: not a valid floating point value In principle what you do should wor
Herramientas Buscar en Tema Desplegado #1 21-11-2012 donpedro Miembro Registrado: Nov 2009 Posts: 77 is not a valid floating point value hola a todos, estoy tratando de hacer que los edit muestren los valores con formato de moneda, y estoy utilizando el siguiente codigo Código Delphi [-]eprecio.text := FormatFloat ('###,###,###,##0.00;-###,###,###,##0.00;0',strToFloat(EPRECIO.Text)); pero a la hora de guardar, me da el siguiente error: eConvertError with message “1,000.00' is not a valid floating point value' como hago para que al guardar me grabe el edit con un formato normal sin la (coma) ni los decimales gracias por sus respuestas de antemano donpedro Ver Perfil Encontrar Todos los Mensajes de donpedro #2 21-11-2012 dec Moderador Registrado: Dec 2004 Ubicación: Alcobendas, Madrid, España Posts: 12.323 Hola, Quizá te interese leer este artículo de Salvador Jover: EditMask y TFormatSettings. __________________ David Esperalta www.davidesperalta.com dec Ver Perfil ¡Visita mi Sitio! Encontrar Todos los Mensajes de dec #3 21-11-2012 [nlsgarcia] Miembro Premium Registrado: Feb 2007 Ubicación: Caracas, Venezuela Posts: 2.206 donpedro, Revisa este link: Cita: Guardar en MySQL Formato Moneda: http://www.clubdelphi.com/foros/showthread.php?t=81445 Espero sea útil Nelson. nlsgarcia Ver Perfil Encontrar Todos los Mensajes de nlsgarcia #4 21-11-2012 ecfisa Moderador Registrado: Dec 2005 Ubicación: Tres Arroyos, Argentina Posts: 9.380 Hola donpedro. Aunque creo que con lo dicho por los compañeros debería ser más que suficiente, te agrego algunos enlaces en que se trato sobre el tema:Como cambiar "." por "," !!! Formato numeros reales Multiplicar un edit con separador de miles Convertir un texto de un edit en un número con decimales StrToFloat en Delphi 2010 y windows 7 Punto decimal... ... (mas en la búsqueda de los foros) Por cierto, muy didáctico el artículo dec Saludos. __________________ Daniel Didriksen Guía de estilo - Uso de las etiquetas - La otra guía de estilo .... ecfisa Ver Perfil Encontrar Todos los Mensajes de ecfisa #5 22-11-2012 dec Moderador Registrado: Dec 2004 Ubicación: Alcobendas, Madrid, España Posts: 12.323 Cita: Empezado por ecfisa Por cierto, muy didáctico el artículo dec ¡Mérito todo de Salvador Jover! Yo sólo enlacé. __________________ David Esperalta www.davidesperalta.com dec Ver Perfil ¡Visita mi Sitio! Encontrar Todos los Mensajes de dec #6 22-11-2012 Faust Miembro Registrado: Apr 2006 Ubicación: México D.F. Posts: 927 Cita: Empe