IListSource Arabirim

Tanım

Bir veri kaynağına bağlanabilen bir liste döndürmek için bir nesneye işlevsellik sağlar.Provides functionality to an object to return a list that can be bound to a data source.

public interface class IListSource
public interface IListSource
[System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public interface IListSource
[System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public interface IListSource
[System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=2.0.5.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public interface IListSource
type IListSource = interface
[<System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")>]
type IListSource = interface
[<System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")>]
type IListSource = interface
[<System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=2.0.5.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")>]
type IListSource = interface
Public Interface IListSource
Türetilmiş
Öznitelikler

Örnekler

Aşağıdaki kod örneği, arabirimin nasıl uygulanacağını gösterir IListSource .The following code example demonstrates how to implement the IListSource interface. Adlı bir bileşen EmployeeListSource IList yöntemini uygulayarak veri bağlama için bir oluşturur GetList .A component named EmployeeListSource exposes an IList for data binding by implementing the GetList method. Tam kod listesi için bkz. nasıl yapılır: ISource arabirimini uygulama.For a full code listing, see How to: Implement the IListSource Interface.

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;

namespace IListSourceCS
{
    public class EmployeeListSource : Component, IListSource
    {
        public EmployeeListSource() {}

        public EmployeeListSource(IContainer container)
        {
            container.Add(this);
        }

        #region IListSource Members

        bool IListSource.ContainsListCollection
        {
            get { return false; }
        }

        System.Collections.IList IListSource.GetList()
        {
            BindingList<Employee>   ble = new BindingList<Employee>();

            if (!this.DesignMode)
            {
                ble.Add(new Employee("Aaberg, Jesper", 26000000));
                ble.Add(new Employee("Cajhen, Janko", 19600000));
                ble.Add(new Employee("Furse, Kari", 19000000));
                ble.Add(new Employee("Langhorn, Carl", 16000000));
                ble.Add(new Employee("Todorov, Teodor", 15700000));
                ble.Add(new Employee("Verebélyi, Ágnes", 15700000));
            }

            return ble;
        }

        #endregion
    }
}
Imports System.ComponentModel

Public Class EmployeeListSource
    Inherits Component
    Implements IListSource

    <System.Diagnostics.DebuggerNonUserCode()> _
Public Sub New(ByVal Container As System.ComponentModel.IContainer)
        MyClass.New()

        'Required for Windows.Forms Class Composition Designer support
        Container.Add(Me)

    End Sub

    <System.Diagnostics.DebuggerNonUserCode()> _
    Public Sub New()
        MyBase.New()

        'This call is required by the Component Designer.
        InitializeComponent()

    End Sub

    'Component overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Component Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Component Designer
    'It can be modified using the Component Designer.
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        components = New System.ComponentModel.Container()
    End Sub

#Region "IListSource Members"

    Public ReadOnly Property ContainsListCollection() As Boolean Implements System.ComponentModel.IListSource.ContainsListCollection
        Get
            Return False
        End Get
    End Property

    Public Function GetList() As System.Collections.IList Implements System.ComponentModel.IListSource.GetList

        Dim ble As New BindingList(Of Employee)

        If Not Me.DesignMode Then
            ble.Add(New Employee("Aaberg, Jesper", 26000000))
            ble.Add(New Employee("Cajhen, Janko", 19600000))
            ble.Add(New Employee("Furse, Kari", 19000000))
            ble.Add(New Employee("Langhorn, Carl", 16000000))
            ble.Add(New Employee("Todorov, Teodor", 15700000))
            ble.Add(New Employee("Verebélyi, Ágnes", 15700000))
        End If

        Return ble

    End Function

#End Region

End Class

Açıklamalar

Bu arabirimi genellikle bir veri kaynağına bağlanabilen bir listeyi, kendisini uygulamayan bir nesneden döndürmek için kullanırsınız IList .You typically use this interface to return a list that can be bound to a data source, from an object that does not implement IList itself.

Veriye bağlama, çalışma zamanında ya da bir tasarımcıda olabilir, ancak her biri için kurallar vardır.Binding to data can occur at either run time or in a designer, but there are rules for each. Çalışma zamanında, aşağıdakilerden herhangi birine veri bağlayabilirsiniz:At run time, you can bind to data in any of the following:

  • Array

  • Uygulayıcısı, uygulayan, IList türü kesin belirlenmiş bir özelliğe sahiptir (yani, Item[] ancak her bir şeydir Type Object ).Implementer of IList, provided the implementer has a strongly typed Item[] property (that is, the Type is anything but Object). Bunu, varsayılan özel uygulamayı yaparak gerçekleştirebilirsiniz Item[] .You can accomplish this by making the default implementation of Item[] private. IListTürü kesin belirlenmiş bir koleksiyonun kurallarını izleyen bir oluşturmak isterseniz, ' den türetmelisiniz CollectionBase .If you want to create an IList that follows the rules of a strongly typed collection, you should derive from CollectionBase.

  • Uygulayıcısı ITypedList .Implementer of ITypedList.

Bir tasarımcıda Component aynı kuralları izleyerek nesnelere bağlamayı başlatabilirsiniz.In a designer, you can initialize binding to Component objects by following the same rules.

Not

Uygulayıcıları, bir IListSource IList nesne koleksiyonu içeren bir döndürebilir IList .Implementers of IListSource can return an IList that contains a collection of IList objects.

Özellikler

ContainsListCollection

Koleksiyonun bir nesne koleksiyonu olup olmadığını gösteren bir değer alır IList .Gets a value indicating whether the collection is a collection of IList objects.

Yöntemler

GetList()

IListKendisini uygulamayan bir nesneden bir veri kaynağına bağlanabilen bir döndürür IList .Returns an IList that can be bound to a data source from an object that does not implement an IList itself.

Şunlara uygulanır

Ayrıca bkz.