IListSource IListSource IListSource IListSource Interface

定义

向对象提供返回可以绑定到数据源列表的功能。Provides functionality to an object to return a list that can be bound to a data source.

public interface class IListSource
[System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
[System.ComponentModel.TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
[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
Public Interface IListSource
派生
属性

示例

下面的代码示例演示如何实现IListSource接口。The following code example demonstrates how to implement the IListSource interface. 名为EmployeeListSource的组件通过IList实现GetList方法公开数据绑定的。A component named EmployeeListSource exposes an IList for data binding by implementing the GetList method. 有关完整的代码清单, 请参阅如何:实现 IListSource 接口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

注解

通常, 使用此接口可以从未实现IList自身的对象中返回可以绑定到数据源的列表。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.

绑定到数据时, 可以在运行时或设计器中进行, 但每个都有规则。Binding to data can occur at either run time or in a designer, but there are rules for each. 在运行时, 可以通过以下任一操作绑定到数据:At run time, you can bind to data in any of the following:

在设计器中, 可以遵循相同的Component规则来初始化到对象的绑定。In a designer, you can initialize binding to Component objects by following the same rules.

备注

IListSource实现程序IList可以返回包含IList对象集合的。Implementers of IListSource can return an IList that contains a collection of IList objects.

属性

ContainsListCollection ContainsListCollection ContainsListCollection ContainsListCollection

获取表示集合是否是 IList 对象集合的值。Gets a value indicating whether the collection is a collection of IList objects.

方法

GetList() GetList() GetList() GetList()

从不实现 IList 本身的对象返回可以绑定到数据源的 IListReturns an IList that can be bound to a data source from an object that does not implement an IList itself.

适用于

另请参阅