Design-time及Runtime的問題!! |
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答題得分者是：mustapha.wang
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ucdesign2
一般會員   發表：24 回覆：33 積分：11 註冊：2002-10-23 發送簡訊給我 |
先前問了如何在自製元件的屬性中可下拉資料供選取,那問題已得到解答!
但那下拉資料內容如果是來自在自製元件create時所產生的資料,請問要如何
做?試了很久都失敗!想請眾前輩幫忙,謝謝!!!
Source code 簡略如下,有edit2tableReg.pas及doedit2table.pas
在edit2tableReg.pas中有uses doedit2table,
MasterTable屬性資料要如何取得FConnect所指資料庫中的所有資料表名稱? unit Edit2TableREG;
interface
uses
Windows, Classes, Forms, StdCtrls,DesignIntf, DesignEditors;
type
TMasterTableProperty = class(TStringProperty) // Property Editor Class
public
function GetAttributes: TPropertyAttributes; override;
procedure GetValues(Proc: TGetStrProc); override;
end;
procedure Register; implementation
USES doedit2table; {$R *.DCR} { TMasterTableProperty } function TMasterTableProperty.GetAttributes: TPropertyAttributes;
begin
Result := [paValueList, paAutoUpdate, paSortList];
end; procedure TMasterTableProperty.GetValues(Proc: TGetStrProc);
var
MasterTable: TStrings;
TableNum: Integer;
begin
MasterTable := nil;
try
MasterTable := TStringList.Create;
//此處如何實做MasterTable屬性的內容 //MasterTable.Add('MTable1'); // will add into Combobox item
//MasterTable.Add('MTable2');
for TableNum := 0 to MasterTable.Count - 1 do
Proc(MasterTable[TableNum]);
finally
MasterTable.Free;
end;
end; procedure Register;
begin
RegisterComponents('Custom', [TEdit2Table]);
RegisterPropertyEditor(TypeInfo(String), TEdit2Table,
'MasterTable', TMasterTableProperty);
end;
end.
//-------------------DOEdit2Table------------------------
unit DOEdit2Table;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls……,
type
TEditDataLink1 = class;
TEdit2Table = class(TCustomPanel)
private
FDataLink1: TEditDataLink1;
SL: TStrings;
FConnect:TADOConnection;
FAdoDataSet1:TADODataSet;
FAdoDataSet2:TADODataSet;
FDatasource1: TDataSource;
FDatasource2: TDataSource;
FMasterTable:String;
protected
procedure Resize;override;
procedure DataChanged;
procedure EditingChanged;
procedure ActiveChanged;
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Loaded; override;
published
property MasterTable:String read FMasterTable write FMasterTable;
:
:
constructor TEdit2Table.Create(AOwner: TComponent);
var
opt1:TDBGridOptions;
opt2:TDBGridOptions;
INDEX:INTEGER;
begin
inherited Create(AOwner);
FDataLink1 := TEditDataLink1.Create(Self);
:
:
FDatasource1:=TDataSource.Create(Self);
FDatasource2:=TDataSource.Create(Self);
FConnect:=TADOConnection.Create(self);
FConnect.Name:='ADOConnection1';
FConnect.ConnectionString:='Provider=SQLOLEDB.1;Password=1209;Persist Security Info=True;User ID=sa;Initial Catalog=PRS;Data Source=server';
SL := TStringList.Create;
FConnect.GetTableNames(SL,False); // ←
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mustapha.wang
資深會員   發表：89 回覆：409 積分：274 註冊：2002-03-13 發送簡訊給我 |
procedure TMasterTableProperty.GetValues(Proc: TGetStrProc);
var
TableNum: Integer;
ATable:TEdit2Table;
begin
ATable:=TEdit2Table(GetComponent(0));
for TableNum := 0 to ATable.SL.Count - 1 do
Proc(ATable.SL[TableNum]);
end;
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江上何人初见月，江月何年初照人 |
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ucdesign2
一般會員 發表：24 回覆：33 積分：11 註冊：2002-10-23 發送簡訊給我 |
發表時間：2004-04-23 10:15:07
IP:211.23.xxx.xxx 未訂閱
系統時間：2025-02-22 16:54:01
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