クライアント側 UI オートメーション プロバイダーの作成
Note
このドキュメントは、System.Windows.Automation 名前空間で定義されているマネージド UI オートメーション クラスを使用する .NET Framework 開発者を対象としています。 UI オートメーションの最新情報については、Windows Automation API の「UI オートメーション」を参照してください。
このトピックのコード例では、クライアント側 UI オートメーション プロバイダーを実装する方法を示します。
例
コンソール ウィンドウの非常に単純なクライアント側プロバイダーを実装するダイナミックリンク ライブラリ (DLL) に、次のコード例を組み込むことができます。 このコードは、有用な機能は備えていませんが、UI オートメーション クライアント アプリケーションによって登録できるプロバイダー アセンブリを設定する際の基本的な手順を示すために用意されています。
using System;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
namespace ClientSideProviderAssembly
{
// The assembly must implement a UIAutomationClientSideProviders class,
// and the namespace must be the same as the name of the DLL, so that
// UI Automation can find the table of descriptors. In this example,
// the DLL would be "ClientSideProviderAssembly.dll"
static class UIAutomationClientSideProviders
{
/// <summary>
/// Implementation of the static ClientSideProviderDescriptionTable field.
/// In this case, only a single provider is listed in the table.
/// </summary>
public static ClientSideProviderDescription[] ClientSideProviderDescriptionTable =
{
new ClientSideProviderDescription(
// Method that creates the provider object.
new ClientSideProviderFactoryCallback(ConsoleProvider.Create),
// Class of window that will be served by the provider.
"ConsoleWindowClass")
};
}
class ConsoleProvider : IRawElementProviderSimple
{
IntPtr providerHwnd;
public ConsoleProvider(IntPtr hwnd)
{
providerHwnd = hwnd;
}
internal static IRawElementProviderSimple Create(
IntPtr hwnd, int idChild, int idObject)
{
// This provider doesn't expose children, so never expects
// nonzero values for idChild.
if (idChild != 0)
return null;
else
return new ConsoleProvider(hwnd);
}
private static IRawElementProviderSimple Create(
IntPtr hwnd, int idChild)
{
// Something is wrong if idChild is not 0.
if (idChild != 0) return null;
else return new ConsoleProvider(hwnd);
}
#region IRawElementProviderSimple
// This is a skeleton implementation. The only real functionality
// at this stage is to return the name of the element and the host
// window provider, which can supply other properties.
ProviderOptions IRawElementProviderSimple.ProviderOptions
{
get
{
return ProviderOptions.ClientSideProvider;
}
}
IRawElementProviderSimple IRawElementProviderSimple.HostRawElementProvider
{
get
{
return AutomationInteropProvider.HostProviderFromHandle(providerHwnd);
}
}
object IRawElementProviderSimple.GetPropertyValue(int propertyId)
{
if (propertyId == AutomationElementIdentifiers.NameProperty.Id)
return "Custom Console Window";
else
return null;
}
object IRawElementProviderSimple.GetPatternProvider(int iid)
{
return null;
}
#endregion IRawElementProviderSimple
}
}
Imports System.Windows.Automation
Imports System.Windows.Automation.Provider
Namespace ClientSideProviderAssembly
' The assembly must implement a UIAutomationClientSideProviders class,
' and the namespace must be the same as the name of the DLL, so that
' UI Automation can find the table of descriptors. In this example,
' the DLL would be "ClientSideProviderAssembly.dll"
Friend NotInheritable Class UIAutomationClientSideProviders
''' <summary>
''' Implementation of the static ClientSideProviderDescriptionTable field.
''' In this case, only a single provider is listed in the table.
''' </summary>
Public Shared ClientSideProviderDescriptionTable() As ClientSideProviderDescription = { New ClientSideProviderDescription(New ClientSideProviderFactoryCallback(AddressOf ConsoleProvider.Create), "ConsoleWindowClass") }
' Method that creates the provider object.
' Class of window that will be served by the provider.
End Class
Friend Class ConsoleProvider
Implements IRawElementProviderSimple
Private providerHwnd As IntPtr
Public Sub New(ByVal hwnd As IntPtr)
providerHwnd = hwnd
End Sub
Friend Shared Function Create(ByVal hwnd As IntPtr, ByVal idChild As Integer, ByVal idObject As Integer) As IRawElementProviderSimple
' This provider doesn't expose children, so never expects
' nonzero values for idChild.
If idChild <> 0 Then
Return Nothing
Else
Return New ConsoleProvider(hwnd)
End If
End Function
Private Shared Function Create(ByVal hwnd As IntPtr, ByVal idChild As Integer) As IRawElementProviderSimple
' Something is wrong if idChild is not 0.
If idChild <> 0 Then
Return Nothing
Else
Return New ConsoleProvider(hwnd)
End If
End Function
#Region "IRawElementProviderSimple"
' This is a skeleton implementation. The only real functionality
' at this stage is to return the name of the element and the host
' window provider, which can supply other properties.
Private ReadOnly Property IRawElementProviderSimple_ProviderOptions() As ProviderOptions Implements IRawElementProviderSimple.ProviderOptions
Get
Return ProviderOptions.ClientSideProvider
End Get
End Property
Private ReadOnly Property HostRawElementProvider() As IRawElementProviderSimple Implements IRawElementProviderSimple.HostRawElementProvider
Get
Return AutomationInteropProvider.HostProviderFromHandle(providerHwnd)
End Get
End Property
Private Function GetPropertyValue(ByVal propertyId As Integer) As Object Implements IRawElementProviderSimple.GetPropertyValue
If propertyId = AutomationElementIdentifiers.NameProperty.Id Then
Return "Custom Console Window"
Else
Return Nothing
End If
End Function
Private Function GetPatternProvider(ByVal iid As Integer) As Object Implements IRawElementProviderSimple.GetPatternProvider
Return Nothing
End Function
#End Region ' IRawElementProviderSimple
End Class
End Namespace