StringGrid related questions

almir · #1 03-Nov-2008, 07:32

Hi all,
I have a couple of StringGrid related questions (within Borland environment). Maybe I should have asked them separately, but I guess that this is more efficient way. I do not expect one person to answer all of them, and I have plenty of time so whenever I get the answers I will be very thankful.

First question: What is the most efficient way to clear the contents of a StringGrid. At present I do a loop:

CPP / C++ / C Code:

for (int a=1;a<=stringGridX->RowCount-1;a++)
    stringGridX->Rows[a]->Clear();
    stringGridX->Refresh();

Is there some kind of function, like: stringGridx.Clear or Erase or so, which I obviously could not find?

Second question: I do the above code in a function called void clearGrid(); but it does not perform always? When I call it, it does not clear the grid...?

Third question: How do you print contents of a StringGrid in a plain, no specially formatted text on paper?

Fourth question: How do you save contents of a StringGrid in normal txt file format?

Fifth question: How do you get rid of the blue-highlighted first top left cell when the StringGrid shows for the first time on the screen?

thanks,

almir

Howard_L · #2 03-Nov-2008, 08:37

We could give you a better answer if we could see your code.
Make a small working example and post it.

almir · #3 05-Nov-2008, 05:29

Hi,
sorry for reacting to your reply a bit late but I wrestled with these for some time and the best code I could come up with - and it does not work, of course... - is for trying to save the contents of a StringGrid:

CPP / C++ / C Code:

void __fastcall TForm1::Button1Click(TObject *Sender)
{
AnsiString nameOfFile;
  if (SaveDialog1->Execute())
    {if (FileExists)
      {
        nameOfFile=SaveDialog1->FileName;
        if (RightStr(nameOfFile,4)==".txt")
        {
          StringGrid1->Rows->SaveToFile(SaveDialog1->FileName);
        }
        else
        {
          StringGrid1->Rows->SaveToFile(SaveDialog1->FileName+".txt");
        }
      }
    }
}

The compiler tells me that I have too few parameters calling Raws.

The other code, for printing the contents of a string grid I might infer if I have the upper code right, I guess.

The other code, for eliminating the blue highlight of a top left cell I really have no idea how it should look like...

regards,

almir

Howard_L · #4 05-Nov-2008, 07:32

This is NOT a small working example.... only a component. there is not even a 'Raws' in there.
We need to see how you declare and call everything.
Make something we can slap in and run and see the same behavior that you do. OK?
Do all the things in this TStringGrid tutorial work for you? sheepdogguides.com/dt2k.htm
I do not use Boland IDE and will not be able to play along... perhaps someone else does.

almir · #5 05-Nov-2008, 08:13

Here is all the code I have in the IDE:

CPP / C++ / C Code:

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
AnsiString truncateName;
  if (SaveDialog1->Execute())
    {if (FileExists)
      {
        truncateName=SaveDialog1->FileName;
        if (RightStr(truncateName,4)==".txt")
        {
          StringGrid1->Rows->SaveToFile(SaveDialog1->FileName);
        }
        else
        {
          StringGrid1->Rows->SaveToFile(SaveDialog1->FileName+".txt");
        }
      }
    }
}
//---------------------------------------------------------------------------

Besides that, there is one StringGrid on the form, one Save dialogue and a Button (which is supposed to save the file when clicked, but obviously does not work.)

The tutorial is useful - thanks!, and I already got some ideas, although not for the question above,

thanks,

almir

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