TSringGrid用法（转）

今天在书上看到了StringGrid的使用，写的例子很少，以前在做毕业设计时我也使用过这个控件，不过现在都很久没有使用这个控件了，所以都有点生疏了；其实一直以来我经常光顾的一个学习delphi的网站就是万一老师的博客http://del.cnblogs.com/，里面的资料很很多，受益匪浅！今天特地又从网上找了找了点关于StringGrid的用法，并做下统计如下：

       在程序设计语言中，二维数组必须先定义后使用，所谓先定义就是要确定二维数组的行数与列数及其数据类型。同样StringGrid组件在使用前也应定义其行数与列数，行数和列数分别用RowCount与ColCount属性动态确定。所以下面先介绍RowCount与ColCount属性。
     (1)RowCount属性
     RowCount属性用于确定StringGrid组件数据表的行数，可在程序设计时用对象监视器设定，将列数RowCount设置为20。也可在程序执行过程中用赋值语句将行数值赋于RowCount. 
     (2)ColCount属性
     ColCount属性用于确定StringGrid组件数据表的列数，可在程序设计时用对象监视器设定，将列数ColCount设置为9。也可在程序执行过程中用赋值语句将列数值赋于ColCount                                        

     (3)FixedRows属性
     该属性用于设置表格显示过程中固定不变的行数。如设置固定行数为1，此时用鼠标拖动表格的垂直滚动条时，第1行始终保持不变。一般第1行为标题行，标题行应始终保持可见状态。
     (4)FixedCols属性
     该属性用于设置表格中固定不变的列数。如设置固定列数为1，此时用鼠标拖动表格的水平滚动条时，第1列始终保持不变。
     一般情况下，固定行与固定列用与表格中其他单元格不同的颜色来表示，用灰色表示，而普通单元格用白色表示。固定行与固定列的颜色可用FixedColor属性设置。
     (5)FixedColor属性
     FixedColor属性用于设置固定行与固定列的颜色。
     (6)Cells属性
     Cells属性用于表示表格中的单元格，格式如下：
     property Cells[Col，：Row：‘IntegeI’]：string；
   其中，Col与Row分别表示单元格在表格中的列号与行号。例如：
     procedure TForml．：ButtonlClick(Sender：’rObject)；
     var I，J：Integer；
     begin
     with StringGrid 1 do
     for I：=0 to ColCount一1 do
     for J：=O to RowCount—l do
     Cells[I，J]：=”；
     end；
     该程序用于将stringGr。idl组件中所有单元格清空。
     (7)Option属性
     Option属性中有许多取逻辑值的子属性，分别用于控制表格线的显示方式，各行能否互换位置，各列能否互换位置，单元格中数据是否允许编辑等。
    （8）单元格宽ColWidths，高RowHeights属性及默认单元格宽DefaultColWidth和高DefaultRowHeight，ColWidths[col] := Colwidths[Col] + 10;DefaultColWidth := 20;

下面将StringGrid的使用大全贴出来，这个是转大富翁里的一个帖子：http://www.delphibbs.com/keylife/iblog_show.asp?xid=4429

StringGrid行列的增加和删除

type
TExCell = class(TStringGrid)

public
procedure DeleteRow(ARow: Longint);
procedure DeleteColumn(ACol: Longint);
procedure InsertRow(ARow: LongInt);
procedure InsertColumn(ACol: LongInt);
end;

procedure TExCell.InsertColumn(ACol: Integer);
begin
ColCount :=ColCount +1;
MoveColumn(ColCount-1, ACol);
end;

procedure TExCell.InsertRow(ARow: Integer);
begin
RowCount :=RowCount +1;
MoveRow(RowCount-1, ARow);
end;

procedure TExCell.DeleteColumn(ACol: Longint);
begin
MoveColumn(ACol, ColCount -1);
ColCount := ColCount - 1;
end;

procedure TExCell.DeleteRow(ARow: Longint);
begin
MoveRow(ARow, RowCount - 1);
RowCount := RowCount - 1;
end;

2003-11-17 16:21:00

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2003-11-17 16:22:50 如何编写使StringGrid中的一列具有Check功能，和CheckBox效果一样

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, Grids;

type
TForm1 = class(TForm)
grid: TStringGrid;
procedure FormCreate(Sender: TObject);
procedure gridDrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
procedure gridClick(Sender: TObject);

private
{ Private declarations }

public
{ Public declarations }

end;

var
Form1: TForm1;
fcheck,fnocheck:tbitmap;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
var
i:SmallInt;
bmp:TBitmap;
begin
FCheck:= TBitmap.Create;
FNoCheck:= TBitmap.Create;
bmp:= TBitmap.create;
try
bmp.handle := LoadBitmap( 0, PChar(OBM_CHECKBOXES ));
With FNoCheck Do

Begin
width := bmp.width div 4;
height := bmp.height div 3;
canvas.copyrect( canvas.cliprect, bmp.canvas, canvas.cliprect );
End;
With FCheck Do Begin
width := bmp.width div 4;
height := bmp.height div 3;
canvas.copyrect(canvas.cliprect, bmp.canvas, rect( width, 0, 2*width, height ));
End;
finally
bmp.free
end;
end;

procedure TForm1.gridDrawCell(Sender: TObject; ACol, ARow: Integer; Rect: TRect; State: TGridDrawState);
begin
if not (gdFixed in State) then
with TStringGrid(Sender).Canvas do
begin
brush.Color:=clWindow;
FillRect(Rect);
if Grid.Cells[ACol,ARow]='yes' then
Draw( (rect.right + rect.left - FCheck.width) div 2, (rect.bottom + rect.top - FCheck.height) div 2, FCheck )
else
Draw( (rect.right + rect.left - FCheck.width) div 2, (rect.bottom + rect.top - FCheck.height) div 2, FNoCheck );
end;
end;

procedure TForm1.gridClick(Sender: TObject);
begin
if grid.Cells[grid.col,grid.row]='yes' then
grid.Cells[grid.col,grid.row]:='no'
else
grid.Cells[grid.col,grid.row]:='yes';
end;

end.

2003-11-17 16:23:23 StringGrid组件Cells内容分行显示

在Tstringgrid.ondrawcell事件中：

DrawText(StringGrid1.Canvas.Handle,pchar(StringGrid1.Cells[Acol,Arow]),Length(StringGrid1.Cells[Acol,Arow]),Rect,DT_WORDBREAK or DT_LEFT);

 

Occurs when a cell in the grid needs to be drawn.

Delphi syntax:

property OnDrawCell: TDrawCellEvent;

C++ syntax:

__property TDrawCellEvent OnDrawCell = {read=FOnDrawCell, write=FOnDrawCell};

Description

Write an OnDrawCell event handler to draw the contents of all the cells in the grid. Draw on the cell using the methods of the Canvas property. The Rect parameter indicates the location of the cell on the canvas. The Col and Row parameters indicate the column and row indexes of the cell that should be drawn. The State parameter indicates whether the cell has input focus, whether the cell is selected, and whether the cell is a fixed (nonscrolling) cell.

If the OnDrawCell event handler is not assigned, all cells in the draw grid will appear empty. If the DefaultDrawing property is true, the draw grid paints the background color of the cell before the OnDrawCell event, and draws a focus rectangle around the selected cell after the OnDrawCell event handler finishes drawing the contents of the cell. If the DefaultDrawing property is false, the OnDrawCell event handler should paint the background of the cell and provide all visual indication of selection and focus.

可以实现文字换行！

2003-11-17 16:24:04 在StringGrid怎样制作只读的列

在 OnSelectCell事件处理程序中,加入: (所有的列均设成可修改的)

if Col mod 2 = 0 then
grd.Options := grd.Options + [goEditing]
else
grd.Options := grd.Options - [goEditing];

2003-11-17 16:25:07 stringgrid从文本读入的问题（Save/Load a TStringGrid to/from a file?）

stringgrid从文本读入的问题（Save/Load a TStringGrid to/from a file?）

// Save a TStringGrid to a file
procedure SaveStringGrid(StringGrid: TStringGrid; const FileName: TFileName);
var
f: TextFile;
i, k: Integer;
begin
AssignFile(f, FileName);
Rewrite(f);
with StringGrid do
begin
// Write number of Columns/Rows
Writeln(f, ColCount);
Writeln(f, RowCount);
// loop through cells
for i := 0 to ColCount - 1 do
for k := 0 to RowCount - 1 do
Writeln(F, Cells[i, k]);
end;
CloseFile(F);
end;

// Load a TStringGrid from a file
procedure LoadStringGrid(StringGrid: TStringGrid; const FileName: TFileName);
var
f: TextFile;
iTmp, i, k: Integer;
strTemp: String;
begin
AssignFile(f, FileName);
Reset(f);
with StringGrid do
begin
// Get number of columns
Readln(f, iTmp);
ColCount := iTmp;
// Get number of rows
Readln(f, iTmp);
RowCount := iTmp;
// loop through cells & fill in values
for i := 0 to ColCount - 1 do
for k := 0 to RowCount - 1 do
begin
Readln(f, strTemp);
Cells[i, k] := strTemp;
end;
end;
CloseFile(f);
end;

// Save StringGrid1 to 'c:.txt':
procedure TForm1.Button1Click(Sender: TObject);
begin
SaveStringGrid(StringGrid1, 'c:.txt');
end;

// Load StringGrid1 from 'c:.txt':
procedure TForm1.Button2Click(Sender: TObject);
begin
LoadStringGrid(StringGrid1, 'c:.txt');
end;

*******************************************

打开一个已有的文本文件,并将内容放到stringgrid中,文本行与stringgrid行一致;
在文本中遇到空格则放入下一cells.
搞定！注意，我只写了一个空格间隔的，你自己修改一下splitstring可以用多个空格分隔！

procedure TForm1.Button1Click(Sender: TObject);
var
aa,bb:tstringlist;
i:integer;
begin
aa:=tstringlist.Create;
bb:=tstringlist.Create;
aa.LoadFromFile('c:.txt');
for i:=0 to aa.Count-1 do
begin
bb:=SplitString(aa.Strings[i],' ');
stringgrid1.Rows[i]:=bb;
end;
aa.Free;
bb.Free;
end;

其中splitstring为：

function SplitString(const source,ch:string):tstringlist;
var
temp:string;
i:integer;
begin
result:=tstringlist.Create;
temp:=source;
i:=pos(ch,source);
while i<>0 do
begin
result.Add(copy(temp,0,i-1));
delete(temp,1,i);
i:=pos(ch,temp);
end;
result.Add(temp);
end;




StringGrid组件Cells内容对齐

在StringGrid的DrawCell事件中添加类似的代码就可以了：

VAR
vCol, vRow : LongInt;
begin
vCol := ACol; vRow := ARow;
WITH Sender AS TStringGrid, Canvas DO
IF vCol = 2 THEN BEGIN ///对于第2列设置为右对齐
SetTextAlign(Handle, TA_RIGHT);
FillRect(Rect);
TextRect(Rect, Rect.RIGHT-2, Rect.Top+2, Cells[vCol, vRow]);
END;
end;

2003-11-17 16:28:41 当我将StringGird的options属性中包含goRowSelect项时每当我选中StringGrid中一行， 则选中行用深蓝色显示，我想将深蓝色改为其他颜色应怎样该？

当我将StringGird的options属性中包含goRowSelect项时每当我选中StringGrid中一行， 则选中行用深蓝色显示，我想将深蓝色改为其他颜色应怎样该？

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
begin
With StringGrid1 do
begin
If (ARow= Krow) and not (acol = 0) then
begin
Canvas.Brush.Color :=clYellow;// ClBlue;
Canvas.FillRect(Rect);
Canvas.font.color:=ClBlack;
Canvas.TextOut(rect.left , rect.top, cells[acol, arow]);
end;
end;
end;

procedure TForm1.StringGrid1SelectCell(Sender: TObject; ACol,
ARow: Integer; var CanSelect: Boolean);
begin
krow := Arow; //*
kcol := Acol;
end;

注意：必须把变量KROW的值初始为1或其他不为0的值，否则如果锁定第一行的话，第一行的颜色将被自设颜色取代，而锁定行不会被重画。

2003-11-17 16:32:44 怎么改变StringGrid控件某一列的背景和某一列的只读属性,StringGrid控件标题栏的对齐.

怎么改变StringGrid控件某一列的背景和某一列的只读属性,StringGrid控件标题栏的对齐.
请参考以下代码：
在OnDrawCell事件中处理背景色。程序如下：
//将第二列背景变为红色。
procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
begin
if not((acol=1) and (arow>=stringgrid1.fixedrows)) then exit;
with stringgrid1 do
begin
canvas.Brush.color:=clRed;
canvas.FillRect(Rect);
canvas.TextOut(rect.left+2,rect.top+2,cells[acol,arow])
end;
end;

//加入如下代码,那么StringGrid的第四列就只读了.其他列非只读
procedure TForm1.StringGrid1SelectCell(Sender: TObject; ACol, ARow: Integer; var CanSelect: Boolean);
begin
with StringGrid1 do begin
if ACol = 4 then
Options := Options - [goEditing]
else Options := Options + [goEditing];
end;

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer; Rect: TRect; State: TGridDrawState);
var
dx,dy:byte;
begin
if (acol = 4) and not (arow = 0) then
with stringgrid1 do
begin
canvas.Brush.color := clYellow;
canvas.FillRect(Rect);
canvas.font.color := clblue;
dx:=2;//调整此值，控制字在网格中显示的水平位置
dy:=2;//调整此值，控制字在网格中显示的垂直位置
canvas.TextOut(rect.left+dx , rect.top+dy , cells[acol, arow]);
end;
//控制标题栏的对齐
if (arow = 0) then
with stringgrid1 do
begin
canvas.Brush.color := clbtnface;
canvas.FillRect(Rect);
dx := 12; //调整此值，控制字在网格中显示的水平位置
dy := 5; //调整此值，控制字在网格中显示的垂直位置
canvas.TextOut(rect.left + dx, rect.top + dy, cells[acol, arow]);
end;
end;

2003-11-17 16:37:15 在stringGrid中使用回车键模拟TAB键切换单元格的功能实现

......
procedure TForm1.StringGrid1KeyPress(Sender: TObject; var Key: Char);
label
nexttab;
begin
if key=#13 then
begin
key:=#0;
nexttab:
if (stringgrid1.Col<stringgrid1.ColCount-1) then
begin
stringgrid1.Col:=stringgrid1.Col+1;
end
else
begin
if stringgrid1.Row>=stringgrid1.RowCount-1 then
stringgrid1.RowCount:=stringgrid1.rowCount+1;
stringgrid1.Row:=stringgrid1.Row+1;
stringgrid1.Col:=0;
goto nexttab;
end;
end;
end;
.........

2003-11-17 16:42:17 stringgrid如何清空

with StringGrid1 do for I := 0 to ColCount - 1 do Cols[I].Clear;

2003-11-17 16:44:00 选中某单元格,然后在该单元格中修改

-> 选中某单元格,然后在该单元格中修改

设置属性:
StringGrid1.Options:=StringGrid1.Options+[goEditing];

2003-11-17 16:46:14 让记录在StringGrid中分页显示

在Uses中加入： ADOInt

//首先设定PageSize，取出PageCount
procedure TForm1.Button1Click(Sender: TObject);
begin
ADoquery1.Recordset.PageSize :=spinedit1.Value;
Edit1.Text := IntToStr(ADoquery1.Recordset.PageCount);
ShowData(spinedit2.Value);
end;

//然后将AbsolutePage的数据乾坤大挪移到StringGrid1中
procedure TForm1.ShowData(page:integer);
var
iRow, iCol, iCount : Integer;
rs : ADOInt.Recordset;
begin
ADoquery1.Recordset.AbsolutePage:=Page;
Currpage:=page;
iRow := 0;
iCol := 1;
stringgrid1.Cells[iCol, iRow] := 'FixedCol1';
Inc(iCol);
stringgrid1.Cells[iCol, iRow] := 'FixedCol2';
Inc(iRow);
Dec(iCol);
rs := adoquery1.Recordset;
for iCount := 1 to SpinEdit1.Value do
begin
stringgrid1.Cells[iCol, iRow] := rs.Fields.Get_Item('FieldName1').Value;
Inc(iCol);
stringgrid1.Cells[iCol, iRow] := rs.Fields.Get_Item('FieldName1').Value;
Inc(iRow);
Dec(iCol);
rs.MoveNext;
end;

//上一页
procedure TForm1.Button2Click(Sender: TObject);
begin
If (CurrPage)<>1 then
ShowData(CurrPage-1);
end;

//下一页
procedure TForm1.Button3Click(Sender: TObject);
begin
If CurrPage<>ADoquery1.Recordset.PageCount then
ShowData(CurrPage+1);
end;

2003-11-17 16:48:51 打印StringGrid的程序源码

这段代码没有看懂，但是可能有的朋友需要，所以共享一下子 ：）

procedure TForm1.SpeedButton11Click(Sender: TObject);
Var
Index_R ,ALeft: Integer;
Index : Integer;
begin
StringGrid_File('D:\AAA.TXT');
if Not LinkTextFile then
begin
ShowMessage('失败');
Exit;
end;
//
QuickRep1.DataSet := ADOTable1;
Index_R := ReSize(StringGrid1.Width);
ALeft := 13;
Create_Title(TitleBand1,ALeft,24,HeaderControl1.Sections.Items[0].Width,20,
HeaderControl1.Sections[0].Text,taLeftJustify);
with Create_QRDBText(DetailBand1,ALeft,8,StringGrid1.ColWidths[0],20,
StringGrid1.Font,taLeftJustify) do
begin
DataSet := ADOTable1;
DataField := ADOTable1.Fields[0].DisplayName;
end;
ALeft := ALeft + StringGrid1.ColWidths[0] * Index_R + Index_R;
For Index := 1 to ADOTable1.FieldCount - 1 do
begin
Create_VLine(TitleBand1,ALeft - 13,16,1,40);
Create_Title(TitleBand1,ALeft,24,HeaderControl1.Sections.Items[Index].Width,20,
HeaderControl1.Sections[Index].Text,taLeftJustify);
Create_VLine(DetailBand1,ALeft - 13,-1,1,31);
with Create_QRDBText(DetailBand1,ALeft ,8,StringGrid1.ColWidths[Index] * Index_R,20,
StringGrid1.Font,taLeftJustify) do
begin
DataSet := ADOTable1;
DataField := ADOTable1.Fields[Index].DisplayName;
end;
ALeft := ALeft + StringGrid1.ColWidths[Index] * Index_R + Index_R;
end;
QuickRep1.Preview;
end;

function TForm1.ReSize(AGridWidth: Integer): Integer;
begin
Result := Trunc(718 / AGridWidth);
end;

function TForm1.StringGrid_File(AFileName: String): Boolean;
var
StrValue : String;
Index : Integer;
ACol , ARow : Integer;
AFileValue : System.TextFile;
begin
StrValue := '';
Try
AssignFile(AFileValue , AFileName);
ReWrite(AFileValue);
StrValue := HeaderControl1.Sections[0].Text;
For Index := 1 to HeaderControl1.Sections.Count - 1 do
StrValue := StrValue + ',' + HeaderControl1.Sections[Index].Text;
Writeln(AFileValue,StrValue);
StrValue := '';
For ARow := 0 To StringGrid1.RowCount - 1 do
begin
StrValue := '';
StrValue := StringGrid1.Cells[0,ARow];
For ACol := 1 To StringGrid1.ColCount - 1 do
begin
StrValue := StrValue + ', ' + StringGrid1.Cells[ACol,ARow];
end;
Writeln(AFileValue,StrValue);
end;
Finally
CloseFile(AFileValue);
end;
end;

function TForm1.LinkTextfile: Boolean;
begin
Result := False;
with ADOTable1 do
begin
{ConnectionString := 'Provider=Microsoft.Jet.OLEDB.4.0;' +
'Data Source= D:\;Extended Properties=Text;' +
'Persist Security Info=False';
TableName := 'AAA#TXT';
Open; }
if Active then
Result := True;
end;
end;

function TForm1.Create_QRDBText(Sender: TWinControl; ALeft, ATop, AWidth,
AHight: Integer; AFont: TFont; AAlignMent: TAlignment): TQRDBText;
var
AQRDBText : TQRDBText;
begin
AQRDBText := TQRDBText.Create(Nil);
with AQRDBText do
begin
Parent := Sender;
Left := ALeft;
Top := ATop;
Width := AWidth;
Height := AHight;
AlignMent := AAlignMent;
Font.Assign(AFont);
end;
Result := AQRDBText;
end;

function TForm1.Create_VLine(Sender: TWinControl; ALeft, ATop, AWidth,
AHight: Integer): TQRShape;
var
AQRShapeV : TQRShape;
begin
AQRShapeV := TQRShape.Create(Nil);
with AQRShapeV do
begin
Parent := Sender;
Left := ALeft;
Top := ATop;
Width := AWidth;
Height := AHight;
end;
Result := AQRShapeV;
end;

procedure TForm1.Create_Title(Sender: TWinControl; ALeft, ATop, AWidth,
AHight: Integer; ACaption: String; AAlignMent: TAlignment);
var
AQRLabel : TQRLabel;
begin
AQRLabel := TQRLabel.Create(Nil);
with AQRLabel do
begin
Parent := Sender;
Left := ALeft;
Top := ATop;
Width := AWidth;
AlignMent := AAlig

2003-11-17 17:00:09 如何实现在stringgrid中删除鼠标点中的那一行，下一行再顶上的效果？

procedure TForm1.Button1Click(Sender: TObject);
var
Sel : TGridRect;
begin
Sel := StringGrid1.Selection;
DeleteRow(Sel.Top);
end;

// delete row
procedure TForm1.DeleteRow(Row: Integer);
var
i : integer;
begin
if (Row < StringGrid1.RowCount) and (Row > Stringgrid1.FixedRows-1) then
if Row < StringGrid1.RowCount - 1 then
begin
for i := Row to StringGrid1.RowCount-1 do
StringGrid1.Rows[i] := StringGrid1.Rows[i+1];
StringGrid1.RowCount := StringGrid1.RowCount - 1;
end
else stringGrid1.Rows[Row].Clear;
end;