Attributes in Windows Forms Controls

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週三, 2015-12-02 23:10

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The .NET Framework provides a variety of attributes you can apply to the members of your custom controls and components. Some of these attributes affect the run-time behavior of a class, and others affect the design-time behavior.

Attributes for Control and Component Properties

The following table shows the attributes you can apply to properties or other members of your custom controls and components. For an example that uses many of these attributes, see How to: Apply Attributes in Windows Forms Controls.

Attribute	Description
AmbientValueAttribute	Specifies the value to pass to a property to cause the property to get its value from another source. This is known as ambience.
BrowsableAttribute	Specifies whether a property or event should be displayed in a Properties window.
CategoryAttribute	Specifies the name of the category in which to group the property or event when displayed in a PropertyGrid control set to Categorized mode.
DefaultValueAttribute	Specifies the default value for a property.
DescriptionAttribute	Specifies a description for a property or event.
DisplayNameAttribute	Specifies the display name for a property, event, or public void method that takes no arguments.
EditorAttribute	Specifies the editor to use to change a property.
EditorBrowsableAttribute	Specifies that a property or method is viewable in an editor.
HelpKeywordAttribute	Specifies the context keyword for a class or member.
LocalizableAttribute	Specifies whether a property should be localized.
PasswordPropertyTextAttribute	Indicates that an object's text representation is obscured by characters such as asterisks.
ReadOnlyAttribute	Specifies whether the property this attribute is bound to is read-only or read/write at design time.
RefreshPropertiesAttribute	Indicates that the property grid should refresh when the associated property value changes.
TypeConverterAttribute	Specifies what type to use as a converter for the object this attribute is bound to.

Attributes for Data Binding Properties

The following table shows the attributes you can apply to specify how your custom controls and components interact with data binding.

Attribute	Description
BindableAttribute	Specifies whether a property is typically used for binding.
ComplexBindingPropertiesAttribute	Specifies the data source and data member properties for a component.
DefaultBindingPropertyAttribute	Specifies the default binding property for a component.
LookupBindingPropertiesAttribute	Specifies the data source and data member properties for a component.
AttributeProviderAttribute	Enables attribute redirection.

Attributes for Classes

The following table shows the attributes you can apply to specify the behavior of your custom controls and components at design time.

Attribute	Description
DefaultEventAttribute	Specifies the default event for a component.
DefaultPropertyAttribute	Specifies the default property for a component.
DesignerAttribute	Specifies the class used to implement design-time services for a component.
DesignerCategoryAttribute	Specifies that the designer for a class belongs to a certain category.
ToolboxItemAttribute	Represents an attribute of a toolbox item.
ToolboxItemFilterAttribute	Specifies the filter string and filter type to use for a Toolbox item.