RTFormwork/项目代码/RTBasicsV1/D02针织坯布检验/DbPanel/L_DBDateTime.pas

unit L_DBDateTime;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,db,dbtables,dbctrls,Dialogs,
  ComCtrls;

type
  TDBDateTime = class(TDateTimePicker)
  private
    FDataLink:TFieldDataLink;
    //TFieldDataLink<6E><6B>TDataLink<6E><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>࣬
   //  <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><D6B6><EFBFBD>DataSource<63>Ľ<EFBFBD><C4BD><EFBFBD>
    procedure DataChange(sender:Tobject);
//<2F><>DataSet<65>ļ<EFBFBD>¼<EFBFBD>ı䣨<C4B1><E4A3A8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼<EFBFBD><C2BC>
//  ʱ<><CAB1><EFBFBD><EFBFBD>OnDataChange
   //  <20>¼<EFBFBD><C2BC><EFBFBD>DataChange<67><65><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    procedure UpdateData(sender:Tobject);
    //<2F><><EFBFBD><EFBFBD>DataSetǰ<74><C7B0><EFBFBD><EFBFBD>OnUpdateData<74>¼<EFBFBD><C2BC><EFBFBD>
  //    UpdateData<74><61><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    function GetDataSource:TDataSource;
    procedure SetdataSource(value:TDataSource);
    Function GetDataField:String;
    procedure SetdataField(Value:String);
    procedure CMexit(var Message:TCMExit);
    message CM_EXIT;//<2F><><EFBFBD>ؼ<EFBFBD>ʧȥ<CAA7><C8A5><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>CM_EXIT<49><54>Ϣ
  protected
    procedure Change;override;//<2F>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD>
  //  ʱ<><CAB1><EFBFBD>ı<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>OnChange<67>¼<EFBFBD>
    procedure Notification(AComponent:TComponent;
    Operation:Toperation);override;
    //<2F><>ijһ<C4B3>ؼ<EFBFBD><D8BC><EFBFBD>FORM<52><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱDELPHI<48><49>
  //    IDE<44><45><EFBFBD>ø÷<C3B8><C3B7><EFBFBD>֪ͨ<CDA8><D6AA><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD>
  public
    constructor Create(AOwner:Tcomponent);override;
    destructor Destroy;override;
  published
    property DataSource:TDataSource read GetDataSource
    write SetDataSource;//Ϊ<>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD>DataSource<63><65><EFBFBD>ԣ<EFBFBD>
//   ʹ<><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DataSource<63><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    property DataField:String read GetDataField
    write SetDataField;
  end;//Ϊ<>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD>DataField<6C><64><EFBFBD>ԣ<EFBFBD>
 //       ʹ<><CAB9>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ijһ<C4B3>ֶε<D6B6>TField<6C><64><EFBFBD><EFBFBD>

procedure Register;//ע<>ṹ<EFBFBD><E1B9B9>

implementation

procedure TDBDateTime.CMExit;
begin
 try
  FDataLink.UpdateRecord;
 //<2F>ؼ<EFBFBD>ʧȥ<CAA7><C8A5><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>DataSet<65><74>
 // <20>⽫<EFBFBD><E2BDAB><EFBFBD><EFBFBD>OnUpdateData<74>¼<EFBFBD>
 except
  Setfocus;
  raise;
 end;
 DoExit;
end;

constructor TDBDateTime.Create(Aowner:Tcomponent);
begin
  inherited Create(Aowner);
//<2F><><EFBFBD><EFBFBD>DataLink<6E><6B><EFBFBD>󣬹ҽ<F3A3ACB9>OnDataChange<67><65>
  //OnUpdateData<74>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  FDataLink:=TFieldDataLInk.Create;
  FDataLink.OnDataChange:=DataChange;
  FDataLink.OnUpdateData:=Updatedata;
end;

Destructor TDBDateTime.Destroy;
begin
  FDataLink.OnDataChange:=nil;
  FDataLink.OnUpdateData:=nil;
  FDataLink.Free;
  inherited Destroy;
end;

function TDBDateTime.GetdataSource:TdataSource;
begin
  result:=FDataLink.DataSource;
end;

Procedure TDBDateTime.SetDataSource
 (Value:TDataSource);
begin
  FDataLink.DataSource:=Value;
end;

function TDBDateTime.GetDatafield:String;
begin
  result:=FDataLink.FieldName;
end;

procedure TDBDateTime.SetDataField(value:String);
begin
  FdataLink.FieldName:=value;
end;

procedure TDBDateTime.DataChange(Sender:Tobject);
begin
DateTime:=now;
//<2F><><EFBFBD>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD>˻<CBBB><EEB6AF>DataSet<65><74><EFBFBD><EFBFBD><EFBFBD>ݼ<EFBFBD><DDBC>䶯ʱ
 //<2F>ؼ<EFBFBD><D8BC><EFBFBD>ʾ<EFBFBD><CABE>ǰ<EFBFBD><C7B0>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>Ӧ<EFBFBD>ֶ<EFBFBD>ֵ
if FDataLink.Field<>nil then
  if FDataLink.Field.Text<>'' then
      DateTime:=FDatalink.Field.AsDateTime;
end;

Procedure TDBDateTime.UpdateData(sender:Tobject);
begin
  FDatalink.Field.AsDateTime:=DateTime;
  //<2F>ÿؼ<C3BF><D8BC>е<EFBFBD><D0B5><EFBFBD><EFBFBD>ڡ<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ֶ<EFBFBD>
end;

procedure TDBDateTime.Change;
begin
//<2F><><EFBFBD>û<EFBFBD><C3BB>ı<EFBFBD><C4B1>˿ؼ<CBBF><D8BC>е<EFBFBD><D0B5><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>DataSet<65><74>Ϊ<EFBFBD>༭״̬
  FDataLink.Modified;
  if not FDataLink.Editing then
  FdataLink.Edit;
  inherited Change;
end;
procedure TDBDateTime.Notification
 (AComponent:TComponent;Operation:TOperation);
begin
 inherited Notification(Acomponent,Operation);
//<2F><><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>TdataSource
// <20><>ɾ<EFBFBD><C9BE>ʱ<EFBFBD><CAB1><EFBFBD>ؼ<EFBFBD><D8BC><EFBFBD>DataSource<63><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>
 if (Operation=opRemove) and (FDataLink<>nil)
   and (AComponent=Datasource) then
    DataSource:=nil;
 end;

procedure Register;
begin
  RegisterComponents('Data Controls',[TDBDateTime]);
end;

end.