About the Extension implementation Sample
[C#]
ArcViewOnlyExtension.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Framework;
using ESRI.ArcGIS.ADF.CATIDs;
namespace DesktopExtensionsCS
{
[Guid("1ce76e5e-261c-48d9-a3f5-3ae8f3c3eac7")]
[ClassInterface(ClassInterfaceType.None)]
[ProgId("DesktopExtensionsCS.ArcViewOnlyExtension")]
public class ArcViewOnlyExtension : IExtension, IExtensionConfig
{
#region COM Registration Function(s)
[ComRegisterFunction()]
[ComVisible(false)]
static void RegisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryRegistration(registerType);
//
// TODO: Add any COM registration code here
//
}
[ComUnregisterFunction()]
[ComVisible(false)]
static void UnregisterFunction(Type registerType)
{
// Required for ArcGIS Component Category Registrar support
ArcGISCategoryUnregistration(registerType);
//
// TODO: Add any COM unregistration code here
//
}
#region ArcGIS Component Category Registrar generated code
/// <summary>
/// Required method for ArcGIS Component Category registration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryRegistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
MxExtension.Register(regKey);
SxExtensions.Register(regKey);
GxExtensions.Register(regKey);
GMxExtensions.Register(regKey);
}
/// <summary>
/// Required method for ArcGIS Component Category unregistration -
/// Do not modify the contents of this method with the code editor.
/// </summary>
private static void ArcGISCategoryUnregistration(Type registerType)
{
string regKey = string.Format("HKEY_CLASSES_ROOT\\CLSID\\{{{0}}}", registerType.GUID);
MxExtension.Unregister(regKey);
SxExtensions.Unregister(regKey);
GxExtensions.Unregister(regKey);
GMxExtensions.Unregister(regKey);
}
#endregion
#endregion
private IApplication m_application;
private esriExtensionState m_enableState;
private const esriLicenseProductCode RequiredProductCode = esriLicenseProductCode.esriLicenseProductCodeArcView;
#region IExtension Members
/// <summary>
/// Name of extension. Do not exceed 31 characters
/// </summary>
public string Name
{
get
{
return "ArcViewOnlyExtension_CS";
}
}
public void Shutdown()
{
m_application = null;
}
public void Startup(ref object initializationData)
{
m_application = initializationData as IApplication;
if (m_application == null)
return;
}
#endregion
#region IExtensionConfig Members
public string Description
{
get
{
return "ArcView only extension (C# Sample)\r\n" +
"Copyright ? ESRI 2006\r\n\r\n" +
"Only available with an ArcView product license.";
}
}
/// <summary>
/// Friendly name shown in the Extension dialog
/// </summary>
public string ProductName
{
get
{
return "ArcView Extension (C#)";
}
}
public esriExtensionState State
{
get
{
return m_enableState;
}
set
{
if (m_enableState != 0 && value == m_enableState)
return;
//Check if ok to enable or disable extension
esriExtensionState requestState = value;
if (requestState == esriExtensionState.esriESEnabled)
{
//Cannot enable if it's already in unavailable state
if (m_enableState == esriExtensionState.esriESUnavailable)
{
throw new COMException("Not running the appropriate product license.");
}
//Determine if state can be changed
esriExtensionState checkState = StateCheck(true);
m_enableState = checkState;
if (m_enableState == esriExtensionState.esriESUnavailable)
throw new COMException("Not running the appropriate product license.");
}
else if (requestState == 0 || requestState == esriExtensionState.esriESDisabled)
{
//Determine if state can be changed
esriExtensionState checkState = StateCheck(false);
if (checkState != m_enableState)
m_enableState = checkState;
}
}
}
#endregion
/// <summary>
/// Determine extension state
/// </summary>
/// <param name="requestEnable">true if to enable; false to disable</param>
private esriExtensionState StateCheck(bool requestEnable)
{
//Turn on or off extension directly
if (requestEnable)
{
//Check if the correct product is licensed
IAoInitialize aoInitTestProduct = new AoInitializeClass();
esriLicenseProductCode prodCode = aoInitTestProduct.InitializedProduct();
if (prodCode == RequiredProductCode)
return esriExtensionState.esriESEnabled;
return esriExtensionState.esriESUnavailable;
}
else
return esriExtensionState.esriESDisabled;
}
}
}
[Visual Basic .NET]
ArcViewOnlyExtension.vb
Imports ESRI.ArcGIS.ADF.CATIDs
Imports ESRI.ArcGIS.esriSystem
Imports System.Runtime.InteropServices
Imports ESRI.ArcGIS.Framework
<ComClass(ArcViewOnlyExtension.ClassId, ArcViewOnlyExtension.InterfaceId, ArcViewOnlyExtension.EventsId), _
ProgId("DesktopExtensionsVB.ArcViewOnlyExtension")> _
Public Class ArcViewOnlyExtension
Implements IExtension
Implements IExtensionConfig
#Region "COM Registration Function(s)"
<ComRegisterFunction(), ComVisibleAttribute(False)> _
Public Shared Sub RegisterFunction(ByVal registerType As Type)
' Required for ArcGIS Component Category Registrar support
ArcGISCategoryRegistration(registerType)
'Add any COM registration code after the ArcGISCategoryRegistration() call
End Sub
<ComUnregisterFunction(), ComVisibleAttribute(False)> _
Public Shared Sub UnregisterFunction(ByVal registerType As Type)
' Required for ArcGIS Component Category Registrar support
ArcGISCategoryUnregistration(registerType)
'Add any COM unregistration code after the ArcGISCategoryUnregistration() call
End Sub
#Region "ArcGIS Component Category Registrar generated code"
''' <summary>
''' Required method for ArcGIS Component Category registration -
''' Do not modify the contents of this method with the code editor.
''' </summary>
Private Shared Sub ArcGISCategoryRegistration(ByVal registerType As Type)
Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID)
MxExtension.Register(regKey)
GxExtensions.Register(regKey)
SxExtensions.Register(regKey)
GMxExtensions.Register(regKey)
End Sub
''' <summary>
''' Required method for ArcGIS Component Category unregistration -
''' Do not modify the contents of this method with the code editor.
''' </summary>
Private Shared Sub ArcGISCategoryUnregistration(ByVal registerType As Type)
Dim regKey As String = String.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID)
MxExtension.Unregister(regKey)
GxExtensions.Unregister(regKey)
SxExtensions.Unregister(regKey)
GMxExtensions.Unregister(regKey)
End Sub
#End Region
#End Region
#Region "COM GUIDs"
' These GUIDs provide the COM identity for this class
' and its COM interfaces. If you change them, existing
' clients will no longer be able to access the class.
Public Const ClassId As String = "9ef36120-9c61-4207-9884-601a19f25d49"
Public Const InterfaceId As String = "347f8040-acb7-4d92-b371-880ed3964bd8"
Public Const EventsId As String = "442b453d-64e9-4a2c-ad4e-141973880eb2"
#End Region
Private m_application As IApplication
Private m_enableState As esriExtensionState
Private Const RequiredProductCode As esriLicenseProductCode = esriLicenseProductCode.esriLicenseProductCodeArcView
' A creatable COM class must have a Public Sub New()
' with no parameters, otherwise, the class will not be
' registered in the COM registry and cannot be created
' via CreateObject.
Public Sub New()
MyBase.New()
End Sub
''' <summary>
''' Determine extension state
''' </summary>
Private Function StateCheck(ByVal requestEnable As Boolean) As esriExtensionState
'Turn on or off extension directly
If requestEnable Then
'Check if the correct product is licensed
Dim aoInitTestProduct As IAoInitialize = New AoInitializeClass()
Dim prodCode As esriLicenseProductCode = aoInitTestProduct.InitializedProduct()
If prodCode = RequiredProductCode Then _
Return esriExtensionState.esriESEnabled
Return esriExtensionState.esriESUnavailable
Else
Return esriExtensionState.esriESDisabled
End If
End Function
#Region "IExtension Members"
''' <summary>
''' Name of extension. Do not exceed 31 characters
''' </summary>
Public ReadOnly Property Name() As String Implements ESRI.ArcGIS.esriSystem.IExtension.Name
Get
Return "ArcViewOnlyExtension_VB"
End Get
End Property
Public Sub Shutdown() Implements ESRI.ArcGIS.esriSystem.IExtension.Shutdown
m_application = Nothing
End Sub
Public Sub Startup(ByRef initializationData As Object) Implements ESRI.ArcGIS.esriSystem.IExtension.Startup
m_application = CType(initializationData, IApplication)
If m_application Is Nothing Then Return
End Sub
#End Region
#Region "IExtensionConfig Members"
Public ReadOnly Property Description() As String Implements ESRI.ArcGIS.esriSystem.IExtensionConfig.Description
Get
Return "ArcView Only Extension (VB.Net Sample)\r\n" + _
"Copyright ? ESRI 2006\r\n\r\n" + _
"Only available with an ArcView product license."
End Get
End Property
''' <summary>
''' Friendly name shown in the Extensions dialog
''' </summary>
Public ReadOnly Property ProductName() As String Implements ESRI.ArcGIS.esriSystem.IExtensionConfig.ProductName
Get
Return "ArcView Extension (VB.Net)"
End Get
End Property
Public Property State() As ESRI.ArcGIS.esriSystem.esriExtensionState Implements ESRI.ArcGIS.esriSystem.IExtensionConfig.State
Get
Return m_enableState
End Get
Set(ByVal value As ESRI.ArcGIS.esriSystem.esriExtensionState)
If m_enableState <> 0 And value = m_enableState Then Exit Property
'Check if ok to enable or disable extension
Dim requestState As esriExtensionState = value
If requestState = esriExtensionState.esriESEnabled Then
'Cannot enable if it's already in unavailable state
If m_enableState = esriExtensionState.esriESUnavailable Then
Throw New COMException("Not running the appropriate product license.")
End If
'Determine if state can be changed
Dim checkState As esriExtensionState = StateCheck(True)
m_enableState = checkState
If m_enableState = esriExtensionState.esriESUnavailable Then
Throw New COMException("Not running the appropriate product license.")
End If
ElseIf requestState = esriExtensionState.esriESDisabled Then
'Determine if state can be changed
Dim checkState As esriExtensionState = StateCheck(False)
If (m_enableState <> checkState) Then m_enableState = checkState
End If
End Set
End Property
#End Region
End Class