delphi listview结合adapter适配器将access表中数据对应到设置好的列中显示的代码
时间: 2024-04-12 22:31:52 浏览: 132
ListView之适配器
在Delphi中,可以使用TListView组件结合TAdapterBindSource和TAdapterListViewAdapter来将Access表中的数据适配到ListView上显示。下面是一个示例代码,展示如何实现这个功能:
```delphi
unit MainForm;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Data.Bind.GenData, Data.Bind.EngExt,
Vcl.Bind.DBEngExt, System.Rtti, System.Bindings.Outputs, Vcl.Bind.Editors,
Data.Bind.Components, Data.Bind.Grid, Vcl.Grids, Data.Bind.ObjectScope,
Vcl.StdCtrls, Vcl.ExtCtrls, Vcl.Bind.Navigator, Vcl.ComCtrls;
type
TForm1 = class(TForm)
ListView1: TListView;
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
FPersonList: TObjectList<TPerson>;
procedure LoadData;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses
System.Generics.Collections, Data.DB, Datasnap.DBClient;
type
TPerson = class
FirstName: string;
LastName: string;
Age: Integer;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
FPersonList := TObjectList<TPerson>.Create;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
ClientDataSet: TClientDataSet;
begin
LoadData;
ClientDataSet := TClientDataSet.Create(Self);
try
// 将Access表中的数据加载到ClientDataSet中
// 这里假设Access表中包含字段FirstName、LastName和Age
// 可根据实际情况进行修改
ClientDataSet.FieldDefs.Add('FirstName', ftString, 50);
ClientDataSet.FieldDefs.Add('LastName', ftString, 50);
ClientDataSet.FieldDefs.Add('Age', ftInteger);
ClientDataSet.CreateDataSet;
for Person in FPersonList do
begin
ClientDataSet.Append;
ClientDataSet.FieldByName('FirstName').AsString := Person.FirstName;
ClientDataSet.FieldByName('LastName').AsString := Person.LastName;
ClientDataSet.FieldByName('Age').AsInteger := Person.Age;
ClientDataSet.Post;
end;
ListView1.Items.Clear;
ListView1.ItemAppearanceObjects.ItemObjects.Text.Text := 'FirstName';
ListView1.ItemAppearanceObjects.ItemObjects.Detail.Text := 'LastName';
ListView1.ItemAppearanceObjects.ItemObjects.Accessory.Text := 'Age';
// 将ClientDataSet绑定到ListView上
ListView1.Adapter := TListBindSourceAdapter.Create(Self, ClientDataSet);
finally
ClientDataSet.Free;
end;
end;
procedure TForm1.LoadData;
var
Person: TPerson;
begin
Person := TPerson.Create;
Person.FirstName := 'John';
Person.LastName := 'Doe';
Person.Age := 25;
FPersonList.Add(Person);
Person := TPerson.Create;
Person.FirstName := 'Jane';
Person.LastName := 'Smith';
Person.Age := 30;
FPersonList.Add(Person);
end;
end.
```
在上述代码中,首先在FormCreate事件中创建了一个TObjectList<TPerson>对象,用于存储要显示的数据。在Button1Click事件中,通过LoadData方法加载数据,并将数据适配到一个TClientDataSet对象中。
然后,将TClientDataSet对象的字段定义为与Access表中的字段相匹配,并将数据逐条添加到TClientDataSet中。
接下来,通过TListBindSourceAdapter类将TClientDataSet对象绑定到ListView的Adapter属性上,实现数据的绑定和显示。
请注意,在使用TAdapterBindSource和TAdapterListViewAdapter时,需要在uses中添加Data.DB和Datasnap.DBClient单元,并在项目中引用DataSnap和DBClient相关包文件。
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