本文整理汇总了C#中DependencyObject.GetHandler方法的典型用法代码示例。如果您正苦于以下问题：C# DependencyObject.GetHandler方法的具体用法？C# DependencyObject.GetHandler怎么用？C# DependencyObject.GetHandler使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DependencyObject的用法示例。
在下文中一共展示了DependencyObject.GetHandler方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ValidateDependencyProperty
private ValidationErrorCollection ValidateDependencyProperty(DependencyObject dependencyObject, DependencyProperty dependencyProperty, ValidationManager manager)
{
ValidationErrorCollection errors = new ValidationErrorCollection();
Attribute[] validationVisibilityAtrributes = dependencyProperty.DefaultMetadata.GetAttributes(typeof(ValidationOptionAttribute));
ValidationOption validationVisibility = (validationVisibilityAtrributes.Length > 0) ? ((ValidationOptionAttribute)validationVisibilityAtrributes[0]).ValidationOption : ValidationOption.Optional;
Activity activity = manager.Context[typeof(Activity)] as Activity;
if (activity == null)
throw new InvalidOperationException(SR.GetString(SR.Error_ContextStackItemMissing, typeof(Activity).FullName));
PropertyValidationContext propertyValidationContext = new PropertyValidationContext(activity, dependencyProperty);
manager.Context.Push(propertyValidationContext);
try
{
if (dependencyProperty.DefaultMetadata.DefaultValue != null)
{
if (!dependencyProperty.PropertyType.IsValueType &&
dependencyProperty.PropertyType != typeof(string))
{
errors.Add(new ValidationError(SR.GetString(SR.Error_PropertyDefaultIsReference, dependencyProperty.Name), ErrorNumbers.Error_PropertyDefaultIsReference));
}
else if (!dependencyProperty.PropertyType.IsAssignableFrom(dependencyProperty.DefaultMetadata.DefaultValue.GetType()))
{
errors.Add(new ValidationError(SR.GetString(SR.Error_PropertyDefaultTypeMismatch, dependencyProperty.Name, dependencyProperty.PropertyType.FullName, dependencyProperty.DefaultMetadata.DefaultValue.GetType().FullName), ErrorNumbers.Error_PropertyDefaultTypeMismatch));
}
}
// If an event is of type Bind, GetBinding will return the Bind object.
object propValue = null;
if (dependencyObject.IsBindingSet(dependencyProperty))
propValue = dependencyObject.GetBinding(dependencyProperty);
else if (!dependencyProperty.IsEvent)
propValue = dependencyObject.GetValue(dependencyProperty);
if (propValue == null || propValue == dependencyProperty.DefaultMetadata.DefaultValue)
{
if (dependencyProperty.IsEvent)
{
// Is this added through "+=" in InitializeComponent? If so, the value should be in the instance properties hashtable
// If none of these, its value is stored in UserData at design time.
propValue = dependencyObject.GetHandler(dependencyProperty);
if (propValue == null)
propValue = WorkflowMarkupSerializationHelpers.GetEventHandlerName(dependencyObject, dependencyProperty.Name);
if (propValue is string && !string.IsNullOrEmpty((string)propValue))
errors.AddRange(ValidateEvent(activity, dependencyProperty, propValue, manager));
}
else
{
// Maybe this is an instance property.
propValue = dependencyObject.GetValue(dependencyProperty);
}
}
// Be careful before changing this. This is the (P || C) validation validation
// i.e. validate properties being set only if Parent is set or
// a child exists.
bool checkNotSet = (activity.Parent != null) || ((activity is CompositeActivity) && (((CompositeActivity)activity).EnabledActivities.Count != 0));
if (validationVisibility == ValidationOption.Required &&
(propValue == null || (propValue is string && string.IsNullOrEmpty((string)propValue))) &&
(dependencyProperty.DefaultMetadata.IsMetaProperty) &&
checkNotSet)
{
errors.Add(ValidationError.GetNotSetValidationError(GetFullPropertyName(manager)));
}
else if (propValue != null)
{
if (propValue is IList)
{
PropertyValidationContext childContext = new PropertyValidationContext(propValue, null, String.Empty);
manager.Context.Push(childContext);
try
{
foreach (object child in (IList)propValue)
errors.AddRange(ValidationHelpers.ValidateObject(manager, child));
}
finally
{
System.Diagnostics.Debug.Assert(manager.Context.Current == childContext, "Unwinding contextStack: the item that is about to be popped is not the one we pushed.");
manager.Context.Pop();
}
}
else if (dependencyProperty.ValidatorType != null)
{
Validator validator = null;
try
{
validator = Activator.CreateInstance(dependencyProperty.ValidatorType) as Validator;
if (validator == null)
errors.Add(new ValidationError(SR.GetString(SR.Error_CreateValidator, dependencyProperty.ValidatorType.FullName), ErrorNumbers.Error_CreateValidator));
else
errors.AddRange(validator.Validate(manager, propValue));
}
catch
{
errors.Add(new ValidationError(SR.GetString(SR.Error_CreateValidator, dependencyProperty.ValidatorType.FullName), ErrorNumbers.Error_CreateValidator));
//.........这里部分代码省略.........
示例2: ValidateDependencyProperty
private ValidationErrorCollection ValidateDependencyProperty(DependencyObject dependencyObject, DependencyProperty dependencyProperty, ValidationManager manager)
{
ValidationErrorCollection errors = new ValidationErrorCollection();
Attribute[] attributes = dependencyProperty.DefaultMetadata.GetAttributes(typeof(ValidationOptionAttribute));
ValidationOption option = (attributes.Length > 0) ? ((ValidationOptionAttribute) attributes[0]).ValidationOption : ValidationOption.Optional;
Activity propertyOwner = manager.Context[typeof(Activity)] as Activity;
if (propertyOwner == null)
{
throw new InvalidOperationException(SR.GetString("Error_ContextStackItemMissing", new object[] { typeof(Activity).FullName }));
}
PropertyValidationContext context = new PropertyValidationContext(propertyOwner, dependencyProperty);
manager.Context.Push(context);
try
{
if (dependencyProperty.DefaultMetadata.DefaultValue != null)
{
if (!dependencyProperty.PropertyType.IsValueType && (dependencyProperty.PropertyType != typeof(string)))
{
errors.Add(new ValidationError(SR.GetString("Error_PropertyDefaultIsReference", new object[] { dependencyProperty.Name }), 0x1a8));
}
else if (!dependencyProperty.PropertyType.IsAssignableFrom(dependencyProperty.DefaultMetadata.DefaultValue.GetType()))
{
errors.Add(new ValidationError(SR.GetString("Error_PropertyDefaultTypeMismatch", new object[] { dependencyProperty.Name, dependencyProperty.PropertyType.FullName, dependencyProperty.DefaultMetadata.DefaultValue.GetType().FullName }), 0x1a9));
}
}
object propValue = null;
if (dependencyObject.IsBindingSet(dependencyProperty))
{
propValue = dependencyObject.GetBinding(dependencyProperty);
}
else if (!dependencyProperty.IsEvent)
{
propValue = dependencyObject.GetValue(dependencyProperty);
}
if ((propValue == null) || (propValue == dependencyProperty.DefaultMetadata.DefaultValue))
{
if (dependencyProperty.IsEvent)
{
propValue = dependencyObject.GetHandler(dependencyProperty);
if (propValue == null)
{
propValue = WorkflowMarkupSerializationHelpers.GetEventHandlerName(dependencyObject, dependencyProperty.Name);
}
if ((propValue is string) && !string.IsNullOrEmpty((string) propValue))
{
errors.AddRange(this.ValidateEvent(propertyOwner, dependencyProperty, propValue, manager));
}
}
else
{
propValue = dependencyObject.GetValue(dependencyProperty);
}
}
bool flag = (propertyOwner.Parent != null) || ((propertyOwner is CompositeActivity) && (((CompositeActivity) propertyOwner).EnabledActivities.Count != 0));
if (((option == ValidationOption.Required) && ((propValue == null) || ((propValue is string) && string.IsNullOrEmpty((string) propValue)))) && (dependencyProperty.DefaultMetadata.IsMetaProperty && flag))
{
errors.Add(ValidationError.GetNotSetValidationError(base.GetFullPropertyName(manager)));
return errors;
}
if (propValue == null)
{
return errors;
}
if (propValue is IList)
{
PropertyValidationContext context2 = new PropertyValidationContext(propValue, null, string.Empty);
manager.Context.Push(context2);
try
{
foreach (object obj3 in (IList) propValue)
{
errors.AddRange(ValidationHelpers.ValidateObject(manager, obj3));
}
return errors;
}
finally
{
manager.Context.Pop();
}
}
if (dependencyProperty.ValidatorType != null)
{
Validator validator = null;
try
{
validator = Activator.CreateInstance(dependencyProperty.ValidatorType) as Validator;
if (validator == null)
{
errors.Add(new ValidationError(SR.GetString("Error_CreateValidator", new object[] { dependencyProperty.ValidatorType.FullName }), 0x106));
return errors;
}
errors.AddRange(validator.Validate(manager, propValue));
return errors;
}
catch
{
errors.Add(new ValidationError(SR.GetString("Error_CreateValidator", new object[] { dependencyProperty.ValidatorType.FullName }), 0x106));
return errors;
}
}
//.........这里部分代码省略.........
开发者ID:pritesh-mandowara-sp，项目名称:DecompliedDotNetLibraries，代码行数:101，代码来源:DependencyObjectValidator.cs