馬丁，
這並沒有解決我的問題。我不想將datamodule單元放置在我的使用部分中。相反，我想通過設置datasource.dataset來「注入」數據集。
我能找到解決方案。它涉及通過將其active屬性設置爲false來「刷新」linkControltoField1屬性，然後在設置dataset屬性後將其設置爲true。這是我的代碼。 （D10.1柏林）
unit Unit1;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, System.Rtti, System.Bindings.Outputs,
Vcl.Bind.Editors, Data.Bind.EngExt, Vcl.Bind.DBEngExt, FireDAC.Stan.Intf,
FireDAC.Stan.Option, FireDAC.Stan.Param, FireDAC.Stan.Error, FireDAC.DatS,
FireDAC.Phys.Intf, FireDAC.DApt.Intf, FireDAC.Stan.Async, FireDAC.DApt,
FireDAC.UI.Intf, FireDAC.VCLUI.Wait, FireDAC.Stan.Def, FireDAC.Stan.Pool,
FireDAC.Phys, FireDAC.Phys.MSAcc, FireDAC.Phys.MSAccDef, Data.Bind.Controls,
Vcl.ExtCtrls, Vcl.Buttons, Vcl.Bind.Navigator, Data.DB, FireDAC.Comp.Client,
FireDAC.Comp.UI, FireDAC.Comp.DataSet, Data.Bind.Components, Vcl.StdCtrls,
Data.Bind.DBScope, Data.Bind.ObjectScope, Vcl.Bind.Grid, Data.Bind.Grid,
Vcl.Grids;
type
TForm1 = class(TForm)
BindSourceDB1: TBindSourceDB;
Edit1: TEdit;
BindingsList1: TBindingsList;
DataSource1: TDataSource;
FDGUIxWaitCursor1: TFDGUIxWaitCursor;
NavigatorBindSourceDB1: TBindNavigator;
StringGrid1: TStringGrid;
LinkGridToDataSourceBindSourceDB1: TLinkGridToDataSource;
Button1: TButton;
Button2: TButton;
Button3: TButton;
LinkControlToField1: TLinkControlToField;
procedure Button1Click(Sender: TObject);
private
function GetDataset: Tdataset;
procedure SetDataset(const Value: Tdataset);
{ Private declarations }
public
{ Public declarations }
property Dataset: Tdataset read GetDataset write SetDataset;
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
BindSourceDb1.DataSource := DataSource1;
LinkControlToField1.DataSource := BindSourceDB1;
LinkControlToField1.Active := False; //in order for this to work you must
LinkControlToField1.Active := True; // set link to false then to true
end;
function TForm1.GetDataset: Tdataset;
begin
Result := Datasource1.DataSet;
end;
procedure TForm1.SetDataset(const Value: Tdataset);
begin
Datasource1.DataSet := Value;
BindSourceDb1.DataSource := DataSource1;
LinkControlToField1.DataSource := BindSourceDB1;
LinkControlToField1.Active := False; //in order for this to work you must
LinkControlToField1.Active := True; // set link to false then to true
end;
end.
這是文本中的dfm文件。
object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 299
ClientWidth = 635
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
PixelsPerInch = 96
TextHeight = 13
object Edit1: TEdit
Left = 184
Top = 88
Width = 121
Height = 21
TabOrder = 0
end
object NavigatorBindSourceDB1: TBindNavigator
Left = 280
Top = 24
Width = 240
Height = 25
DataSource = BindSourceDB1
Orientation = orHorizontal
TabOrder = 1
end
object StringGrid1: TStringGrid
Left = 168
Top = 112
Width = 320
Height = 120
ColCount = 1
FixedCols = 0
RowCount = 2
TabOrder = 2
ColWidths = (
64)
RowHeights = (
24
24)
end
object Button1: TButton
Left = 208
Top = 256
Width = 75
Height = 25
Caption = 'Button1'
TabOrder = 3
OnClick = Button1Click
end
object Button2: TButton
Left = 352
Top = 256
Width = 75
Height = 25
Caption = 'Button2'
TabOrder = 4
end
object Button3: TButton
Left = 464
Top = 256
Width = 75
Height = 25
Caption = 'Button3'
TabOrder = 5
end
object BindSourceDB1: TBindSourceDB
ScopeMappings = <>
Left = 432
Top = 128
end
object BindingsList1: TBindingsList
Methods = <>
OutputConverters = <>
Left = 20
Top = 5
object LinkGridToDataSourceBindSourceDB1: TLinkGridToDataSource
Category = 'Quick Bindings'
DataSource = BindSourceDB1
GridControl = StringGrid1
Columns = <>
end
object LinkControlToField1: TLinkControlToField
Category = 'Quick Bindings'
FieldName = 'LastName'
Control = Edit1
Track = True
end
end
object DataSource1: TDataSource
Left = 496
Top = 184
end
object FDGUIxWaitCursor1: TFDGUIxWaitCursor
Provider = 'Forms'
Left = 384
Top = 64
end
end
datamodule不起眼。簡單的FDTable和FDconnection。我將它們附加到dbDemos數據庫。注意Unit1不使用Unit2。
unit Unit2;
interface
uses
System.SysUtils, System.Classes, FireDAC.Stan.Intf, FireDAC.Stan.Option,
FireDAC.Stan.Param, FireDAC.Stan.Error, FireDAC.DatS, FireDAC.Phys.Intf,
FireDAC.DApt.Intf, FireDAC.Stan.Async, FireDAC.DApt, FireDAC.UI.Intf,
FireDAC.Stan.Def, FireDAC.Stan.Pool, FireDAC.Phys, FireDAC.Phys.MSAcc,
FireDAC.Phys.MSAccDef, FireDAC.VCLUI.Wait, Data.DB, FireDAC.Comp.Client,
FireDAC.Comp.DataSet;
type
TDataModule2 = class(TDataModule)
FDTable1: TFDTable;
FDConnection1: TFDConnection;
private
{ Private declarations }
public
{ Public declarations }
end;
var
DataModule2: TDataModule2;
implementation
{%CLASSGROUP 'Vcl.Controls.TControl'}
{$R *.dfm}
end.
最後，這裏是程序單元。這是我設置數據集屬性的地方。
program Project1;
uses
Vcl.Forms,
Unit1 in 'Unit1.pas' {Form1},
Unit2 in 'Unit2.pas' {DataModule2: TDataModule};
{$R *.res}
begin
Application.Initialize;
Application.MainFormOnTaskbar := True;
Application.CreateForm(TDataModule2, DataModule2);
Application.CreateForm(TForm1, Form1);
Form1.Dataset := Datamodule2.FDTable1; //Injecting the dataset property
Application.Run;
end.
「使用」我的意思是我將文件添加到其中一個使用部分，「unuse」意味着我將其刪除。 – joeb545
「使用」我的意思是我將文件添加到實施中的使用部分，「不使用」意味着我將其刪除。我正在編程接口。表單有一個名爲ViewModel的接口屬性，我在創建表單後立即設置它。在ViewModel集合過程中，有代碼讀取Datasource.Dataset：= ViewModel.Dataset。數據源已經連接到BindSourceDb。如果我使用數據感知應用程序進行此操作，則附加到數據源的所有控件都會自動連接並填充數據。我如何使用Livebindings進行這項工作？ – joeb545