Примеры добавления, удаления и сортировки столбцов в StringGrid.

Компилятор: Delphi

Вариант 1:

Удаление колонки:

Procedure GridRemoveColumn(StrGrid: TStringGrid; DelColumn: Integer);
Var Column: Integer;
begin
  If DelColumn <= StrGrid.ColCount then
  Begin
    For Column := DelColumn To StrGrid.ColCount-1 do
      StrGrid.Cols[Column-1].Assign(StrGrid.Cols[Column]);
    StrGrid.ColCount := StrGrid.ColCount-1;
  End;
end;

Добавление колонки:

Procedure GridAddColumn(StrGrid: TStringGrid; NewColumn: Integer);
Var Column: Integer;
begin
  StrGrid.ColCount := StrGrid.ColCount+1;
  For Column := StrGrid.ColCount-1 downto NewColumn do
    StrGrid.Cols[Column].Assign(StrGrid.Cols[Column-1]);
  StrGrid.Cols[NewColumn-1].Text := '';
end;

Сортировка столбца:

Procedure GridSort(StrGrid: TStringGrid; NoColumn: Integer);
Var Line, PosActual: Integer;
    Row: TStrings;
begin
  Renglon := TStringList.Create;
  For Line := 1 to StrGrid.RowCount-1 do
  Begin
    PosActual := Line;
    Row.Assign(TStringlist(StrGrid.Rows[PosActual]));
    While True do
    Begin
      If (PosActual = 0) Or (StrToInt(Row.Strings[NoColumn-1]) >=
          StrToInt(StrGrid.Cells[NoColumn-1,PosActual-1])) then
        Break;
      StrGrid.Rows[PosActual] := StrGrid.Rows[PosActual-1];
      Dec(PosActual);
    End;
    If StrToInt(Row.Strings[NoColumn-1]) < StrToInt(StrGrid.Cells[NoColumn-1,PosActual]) then
      StrGrid.Rows[PosActual] := Row;
  End;
  Renglon.Free;
end;

Вариант 2:

Удаление колонки:

procedure RemoveColumn(SG : TStringGrid; ColNumber : integer);
var Column : integer;
begin
  ColNumber := abs(ColNumber);

  if ColNumber <= SG.ColCount then begin
     for Column := ColNumber to SG.ColCount - 2 do begin
        SG.Cols[Column].Assign(SG.Cols[Column + 1]);
        SG.Colwidths[Column] := SG.Colwidths[Column + 1];
     end;
     SG.ColCount := SG.ColCount - 1;
  end;
end;

Добавление колонки:

procedure AddColumn(SG : TStringGrid; AtColNumber : integer;
                    ColWidth : integer = 0);
var Column : integer;
    Wdth : integer;
begin
  AtColNumber := abs(AtColNumber);
  SG.ColCount := SG.ColCount + 1;
  if abs(ColWidth) = 0 then
     Wdth := SG.DefaultColWidth
  else
     Wdth := ColWidth;

  if AtColNumber <= SG.ColCount then begin
    for Column := SG.ColCount - 1 downto AtColNumber + 1 do begin
      SG.Cols[Column].Assign(SG.Cols[Column - 1]);
      SG.Colwidths[Column] := SG.Colwidths[Column - 1];
    end;

    SG.Cols[AtColNumber].Text := '';
    SG.Colwidths[AtColNumber] := Wdth;
  end;  
end;

Сортировка столбца:

type TStringGridExSortType = (srtAlpha,srtInteger,srtDouble);

procedure GridSort(SG : TStringGrid; ByColNumber,FromRow,ToRow : integer;
                   SortType : TStringGridExSortType = srtAlpha);
var Temp : TStringList;

    function SortStr(Line : string) : string;
    var RetVar : string;
    begin
      case SortType of
           srtAlpha   : Retvar := Line;
           srtInteger : Retvar := FormatFloat('000000000',StrToIntDef(trim(Line),0));
           srtDouble  : try
                          Retvar := FormatFloat('000000000.000000',StrToFloat(trim(Line)));
                        except
                          RetVar  := '0.00';
                        end;
      end;

      Result := RetVar;
    end;

    // Рекурсивный QuickSort
    procedure QuickSort(Lo,Hi : integer; CC : TStrings);

        procedure Sort(l,r: integer);
        var  i,j : integer;
             x   : string;
        begin
          i := l; j := r;
          x := SortStr(CC[(l+r) DIV 2]);
          repeat
            while SortStr(CC[i]) < x do inc(i);
            while x < SortStr(CC[j]) do dec(j);
            if i <= j then begin
              Temp.Assign(SG.Rows[j]);      // Меняем местами 2 строки
              SG.Rows[j].Assign(SG.Rows[i]);
              SG.Rows[i].Assign(Temp);
              inc(i); dec(j);
            end;
          until i > j;
          if l < j then sort(l,j);
          if i < r then sort(i,r);
        end;

     begin {quicksort};
       Sort(Lo,Hi);
     end;

begin
  Temp := TStringList.Create;
  QuickSort(FromRow,ToRow,SG.Cols[ByColNumber]);
  Temp.Free;
end;