TStringGrid的应用

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; 




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. 



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);

可以实现文字换行！ 



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]; 




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 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; 




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。



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;　 



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;
.........　 



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




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]; 



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; 



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 := AAlignMent;
　 Caption := ACaption;
end;
end;