Specifies whether a property can only be set at design time.
Assembly: System (in System.dll)
Returns whether the value of the given object is equal to the current Attribute.Equals(Object).).(Overrides
Returns the hash code for this instance.(Overrides Attribute.GetHashCode().)
Determines if this attribute is the default.(Overrides Attribute.IsDefaultAttribute().)
When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)
Returns a string that represents the current object.(Inherited from Object.)
|_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)|
Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)
|_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)|
Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)
Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)
|_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)|
Provides access to properties and methods exposed by an object.(Inherited from Attribute.)
Members marked with theset to true can be set only at design time. Typically, these properties exist only at design time and do not correspond to a real property on the object at run time.
Members that either have no attribute or are marked with theset to false can be set during run time. The default is false.
A property with the InitializeComponent method.set to true has its value serialized to the .resx file instead of the
For more information, see Extending Metadata Using Attributes.
The following example creates a GetLanguage property. The property is marked with a .
<DesignOnly(True)> _ Public Property GetLanguage() As CultureInfo Get ' Insert code here. Return myCultureInfo End Get Set ' Insert code here. End Set End Property
The next example gets the value of the PropertyDescriptorCollection with all the properties for the object. Next it indexes into the PropertyDescriptorCollection to find the GetLanguage property. Then it returns the attributes for this property and saves them in the attributes variable.. First the code gets a
The example then prints whether the property is design only by retrieving AttributeCollection, and writing it to the console screen.from the
' Gets the attributes for the property. Dim attributes As AttributeCollection = _ TypeDescriptor.GetProperties(Me)("GetLanguage").Attributes ' Prints whether the property is marked as DesignOnly ' by retrieving the DesignOnlyAttribute from the AttributeCollection. Dim myAttribute As DesignOnlyAttribute = _ CType(attributes(GetType(DesignOnlyAttribute)), DesignOnlyAttribute) Console.WriteLine(("This property is design only :" & _ myAttribute.IsDesignOnly.ToString()))
Available since 1.1
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.