public static void SetBaseTypeName(string typeName, IServiceProvider serviceProvider)
{
if (string.IsNullOrEmpty(typeName))
{
throw new ArgumentNullException("typeName");
}
IDesignerHost host = serviceProvider.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (host == null)
{
throw new InvalidOperationException(SR.GetString(SR.General_MissingService, typeof(IDesignerHost).FullName));
}
IMemberCreationService memberCreationService = serviceProvider.GetService(typeof(IMemberCreationService)) as IMemberCreationService;
if (memberCreationService == null)
{
throw new InvalidOperationException(SR.GetString("General_MissingService", typeof(IMemberCreationService).FullName));
}
// Validate the base type (this will throw an exception if the type name isn't valid
Type newBaseType = ValidateBaseType(typeName, serviceProvider);
//Warn the user of the change
Type oldBaseType = host.RootComponent.GetType();
if (oldBaseType == newBaseType)
{
return;
}
// If we're switch to a base type that is not derived from CompositeActivity, make sure
// we dont's support events or exceptions
if (!TypeProvider.IsAssignable(typeof(CompositeActivity), newBaseType))
{
PropertyDescriptor supportsEventsPropDesc = TypeDescriptor.GetProperties(host.RootComponent)["SupportsEvents"];
if (supportsEventsPropDesc != null && ((bool)supportsEventsPropDesc.GetValue(host.RootComponent)) == true)
{
supportsEventsPropDesc.SetValue(host.RootComponent, false);
}
PropertyDescriptor supportsExceptionsPropDesc = TypeDescriptor.GetProperties(host.RootComponent)["SupportsExceptions"];
if (supportsExceptionsPropDesc != null && ((bool)supportsExceptionsPropDesc.GetValue(host.RootComponent)) == true)
{
supportsExceptionsPropDesc.SetValue(host.RootComponent, false);
}
}
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(host.RootComponent);
if (host.RootComponent is CompositeActivity && ((CompositeActivity)host.RootComponent).Activities.Count > 0)
{
// Warn user first if there are any children that can not be re-parented to the new root.
IUIService uiService = serviceProvider.GetService(typeof(IUIService)) as IUIService;
if (uiService != null)
{
if (DialogResult.OK != uiService.ShowMessage(SR.GetString(SR.NoChildActivities_Message),
SR.GetString(SR.NoChildActivities_Caption), MessageBoxButtons.OKCancel))
{
return;
}
}
// Remove the children first. This would cause the component removed event to be fired,
// thus remove the generated field from the designer.cs file.
List <Activity> activitiesToRemove = new List <Activity>(((CompositeActivity)host.RootComponent).Activities);
CompositeActivityDesigner rootDesigner = host.GetDesigner(host.RootComponent) as CompositeActivityDesigner;
if (rootDesigner != null)
{
rootDesigner.RemoveActivities(activitiesToRemove.AsReadOnly());
}
}
//Also, clear all properties of original base. That will allow undo to set old values back.
foreach (PropertyDescriptor propertyDescriptor in properties)
{
if (!propertyDescriptor.Name.Equals("BaseActivityType", StringComparison.Ordinal) &&
!propertyDescriptor.Name.Equals("Name", StringComparison.Ordinal) &&
propertyDescriptor.CanResetValue(host.RootComponent))
{
propertyDescriptor.ResetValue(host.RootComponent);
}
}
PropertyDescriptor realBaseActivityTypePropertyDescriptor = properties["BaseActivityType"];
PropertyDescriptor baseActivityTypePropertyDescriptor = TypeDescriptor.CreateProperty(realBaseActivityTypePropertyDescriptor.ComponentType, realBaseActivityTypePropertyDescriptor, DesignerSerializationVisibilityAttribute.Visible);
IComponentChangeService changeService = serviceProvider.GetService(typeof(IComponentChangeService)) as IComponentChangeService;
if (changeService != null)
{
changeService.OnComponentChanging(host.RootComponent, baseActivityTypePropertyDescriptor);
}
((Activity)host.RootComponent).UserData[UserDataKeys.NewBaseType] = newBaseType;
memberCreationService.UpdateBaseType(host.RootComponentClassName, newBaseType);
if (changeService != null)
{
changeService.OnComponentChanged(host.RootComponent, baseActivityTypePropertyDescriptor, baseActivityTypePropertyDescriptor.GetValue(host.RootComponent), typeName);
}
//Work around: Force update of the host by raising idle.This is to ensure undo events work on updated host.
Application.RaiseIdle(new EventArgs());
}
public static void SetBaseTypeName(string typeName, IServiceProvider serviceProvider)
{
if (string.IsNullOrEmpty(typeName))
{
throw new ArgumentNullException("typeName");
}
IDesignerHost host = serviceProvider.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (host == null)
{
throw new InvalidOperationException(SR.GetString("General_MissingService", new object[] { typeof(IDesignerHost).FullName }));
}
IMemberCreationService service = serviceProvider.GetService(typeof(IMemberCreationService)) as IMemberCreationService;
if (service == null)
{
throw new InvalidOperationException(SR.GetString("General_MissingService", new object[] { typeof(IMemberCreationService).FullName }));
}
System.Type fromType = ValidateBaseType(typeName, serviceProvider);
if (host.RootComponent.GetType() != fromType)
{
if (!TypeProvider.IsAssignable(typeof(CompositeActivity), fromType))
{
PropertyDescriptor descriptor = TypeDescriptor.GetProperties(host.RootComponent)["SupportsEvents"];
if ((descriptor != null) && ((bool)descriptor.GetValue(host.RootComponent)))
{
descriptor.SetValue(host.RootComponent, false);
}
PropertyDescriptor descriptor2 = TypeDescriptor.GetProperties(host.RootComponent)["SupportsExceptions"];
if ((descriptor2 != null) && ((bool)descriptor2.GetValue(host.RootComponent)))
{
descriptor2.SetValue(host.RootComponent, false);
}
}
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(host.RootComponent);
if ((host.RootComponent is CompositeActivity) && (((CompositeActivity)host.RootComponent).Activities.Count > 0))
{
IUIService service2 = serviceProvider.GetService(typeof(IUIService)) as IUIService;
if ((service2 != null) && (DialogResult.OK != service2.ShowMessage(SR.GetString("NoChildActivities_Message"), SR.GetString("NoChildActivities_Caption"), MessageBoxButtons.OKCancel)))
{
return;
}
List <Activity> list = new List <Activity>(((CompositeActivity)host.RootComponent).Activities);
CompositeActivityDesigner designer = host.GetDesigner(host.RootComponent) as CompositeActivityDesigner;
if (designer != null)
{
designer.RemoveActivities(list.AsReadOnly());
}
}
foreach (PropertyDescriptor descriptor3 in properties)
{
if ((!descriptor3.Name.Equals("BaseActivityType", StringComparison.Ordinal) && !descriptor3.Name.Equals("Name", StringComparison.Ordinal)) && descriptor3.CanResetValue(host.RootComponent))
{
descriptor3.ResetValue(host.RootComponent);
}
}
PropertyDescriptor oldPropertyDescriptor = properties["BaseActivityType"];
PropertyDescriptor member = TypeDescriptor.CreateProperty(oldPropertyDescriptor.ComponentType, oldPropertyDescriptor, new Attribute[] { DesignerSerializationVisibilityAttribute.Visible });
IComponentChangeService service3 = serviceProvider.GetService(typeof(IComponentChangeService)) as IComponentChangeService;
if (service3 != null)
{
service3.OnComponentChanging(host.RootComponent, member);
}
((Activity)host.RootComponent).UserData[UserDataKeys.NewBaseType] = fromType;
service.UpdateBaseType(host.RootComponentClassName, fromType);
if (service3 != null)
{
service3.OnComponentChanged(host.RootComponent, member, member.GetValue(host.RootComponent), typeName);
}
Application.RaiseIdle(new EventArgs());
}
}