程序结束时出现EInvalidPointer异常,未执行线程,未开定时器,不知何处出现的异常。请高手指教!!
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procedure TFormMain.FormCreate(Sender: TObject);
begin
//窗体及控件初始化部分
Timer1.Interval:=100; //定时器1为更新数据
timer1.Enabled:=False; Timer2.Interval:=1000; //定时器2为数据采集
Timer2.Enabled:=False; Timer3.Interval:=2000;
Timer3.Enabled:=False;end;procedure TFormMain.FormActivate(Sender: TObject);
var empty: Variant;
begin
TVarData(empty).vType := varError;
Map1.CreateCustomTool(CUSTOM_Ruler, miToolTypeLine, miSizeCursor, miSizeCursor, miSizeCursor, empty);
VarClear(Empty);
end;procedure TFormMain.FormShow(Sender: TObject);
Var
MapPath : String;
begin
BStartCollect.Caption:='开始采集'; EdOffice.Text:='';
EdName.Text:='';
EdMode.Text:='';
EdBeginStation.Text:='';
EdEndStation.Text:='';
EdCurrentName.Text:='';
EdKMFlag.Text:='';
EdLon.Text:='';
EdLat.Text:=''; //数据初始化部分
UpdataStartFlag := 0;
AnswerFlag := 3;
ComPort:=1;
BaudRate:=9600;
BOpenCom.Enabled:=True;
BCloseCom.Enabled:=False; CollectStartFlag:=TRUE;
CollectFlag :=False;
CreateLayerFlag:=TRue;
Label14.Visible:=False;
Label15.Visible:=False;
Label16.Visible:=False;
Label17.Visible:=False;
BLabelClear.Visible:=False;
GroupBoxDis.Visible:=False;
BEditRect.Caption:='打开编辑';
GroupEdit.Visible:=False;
GroupBoxMoni.Visible:=False; BAddStation.Enabled:=False; RepeatFlag:=0;
IndexStartAddress :=$00;
UpdataStartAddress := $8000;
IndexNumber:=0;
StandardNumber:=0;
TempAddress:= UpdataStartAddress;
ChangeStartFlag:=True;
DataModule1.Table1.Active:=False;
DataModule1.Table1.TableName:=ExtractFilePath(Application.ExeName)+ 'Db\DBCollect.dbf';
DataModule1.Table1.Active:=true;
CreateLayerFlag:=True;
RectLayerFlag:=False;
ProgressBar2.Min:=0;
ProgressBar2.Position:=0;
Memo1.Clear;
Memo2.Clear;
Label4.Visible:=False;
Label5.Visible:=False;
Memo1.Visible:=False;
Memo2.Visible:=False;
Button2.Visible:=False;
Button3.Visible:=False; TrainPositionFlag:=False;
GPSorStationFlag:=True;
moniOpen:=False;
try
MapPath := extractfilepath(application.ExeName)+'Db\China.tab';
map1.Layers.Add(MapPath,1);
map1.Layers.Item(1).AutoLabel:=True;
map1.Layers.Item(1).LabelProperties.Position:=miPositionBR; Map1.TitleText:='';
except
on E:exception do
showmessage(MapPath+'不存在或者格式损坏,请检查该文件并请重新运行本系统');
end;
end;
procedure TFormMain.FormClose(Sender: TObject; var Action: TCloseAction);
begin DataModule1.Table1.Active:=False;
DataModule1.Table2.Active:=False;
DataModule1.Table3.Active:=False;
DataModule1.Table4.Active:=False;
DataModule1.Table5.Active:=False;
DataModule1.TableMap.Active:=False;
map1.Layers.RemoveAll;
end;