[DUG] Variable in String

[Jolyon Smith]

There isn’t really enough information to go on here to say for sure what your problem is.  “ProgramName” doesn’t “see” anything.  What you use ProgramName with is more relevant (i.e. what some other function “sees” ProgramName as containing.

 

If the value of FW_Path contains a null character and if the function you pass ProgramName to is dealing with null terminated strings, then it will consider the value of the string to be terminated by that null char, regardless of the actual length of the string.

 

Demonstration:

 

var

  s: String;

  msg: String;

begin

  s   := 'hat'#0;   // < the null char is part of the string (in addition to the null char marking the END of the string

  msg := 'That''s a nice ' + s + ' you are wearing';

 

  ShowMessage('Length of message = ' + IntToStr(Length(msg)) + ' chars');

  ShowMessage(msg);

end;

 

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On Behalf Of Bob Pawley
Sent: Monday, 27 June 2011 05:56
To: 'NZ Borland Developers Group - Delphi List'
Subject: Re: [DUG] Variable in String

 

Hi Jolyon

 

Double quoting the path doesn’t seem to work.    ProgramName := ‘”’ + FW_Path + '\FWTools2.4.7\bin\ogr2ogr” "-f" "PostgreSQL" PG:"host=192........ user=postgres dbname=E5R password=........" "'+ DXF +'" -nln Import_Process';

 

All that ProgramName sees is the string variable FW_Path. Even with the +, all of the remaining string is ignored.

 

Bob

 

 

 

From: Jolyon Smith <mailto:jsmith at deltics.co.nz>  

Sent: Wednesday, June 22, 2011 3:49 PM

To: 'NZ Borland Developers Group - Delphi List' <mailto:delphi at delphi.org.nz>  

Subject: Re: [DUG] Variable in String

 

Don’t quote FW_Path element of the program path – you need to quote the entire path AND program file name when/if any part of the path or the filename itself does – or may – contain spaces:

 

e.g.   “path a\sub a\sub b\prog.exe”

 

not   “path a”\sub\prog.exe

 

 

So in your case, this should do the trick:

 

   FW_Path     := X;  

   DXF         := openDialog1.FileName;        

   ProgramName := ‘”’ + FW_Path + '\FWTools2.4.7\bin\ogr2ogr” "-f" "PostgreSQL" PG:"host=192........ user=postgres dbname=E5R password=........" "'+ DXF +'" -nln Import_Process';

   ShowMessage(ProgramName);

 

 

hth

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On Behalf Of Bob Pawley
Sent: Thursday, 23 June 2011 10:30
To: DUG
Subject: [DUG] Variable in String

 

Hi

 

I’m having trouble with using a variable in a string path.

 

When I use the variable FW_Path := ‘C:\Program Files (x86)’ with two single quotes, the following works well and ShowMessage(ProgramName); displayed the full path .

 

When I reference FW_Path to a variable X I get an error returned “Can Not run....” The variable  X is returned as C:\Program Files (x86) without quotes. 

 

I attempted Quote String and got the following ‘C:\Program Files (x86) with one single quote.

 

Both cases return the same error - and in both cases ShowMessage(ProgramName); displayed none of the path after C:\Program Files (x86).

 

Help would be appreciated.

 

Bob

 

   FW_Path := QuoteStr(X);  

  DXF  := openDialog1.FileName;        

  ProgramName :=FW_Path+'\FWTools2.4.7\bin\ogr2ogr "-f" "PostgreSQL" PG:"host=192........ user=postgres dbname=E5R password=........" "'+ DXF +'" -nln Import_Process';

       ShowMessage(ProgramName);

  _____  

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