NonVisualControlAttribute Class
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NonVisualControlAttribute Class

 

Defines the attribute that indicates whether a control is treated as a visual or non-visual control during design time. This class cannot be inherited.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

System.Object
  System.Attribute
    System.Web.UI.NonVisualControlAttribute

[AttributeUsageAttribute(AttributeTargets.Class)]
public sealed class NonVisualControlAttribute : Attribute

NameDescription
System_CAPS_pubmethodNonVisualControlAttribute()

Initializes a new instance of the NonVisualControlAttribute class.

System_CAPS_pubmethodNonVisualControlAttribute(Boolean)

Initializes a new instance of the NonVisualControlAttribute class, using the specified Boolean value to determine whether the attribute represents a visual or non-visual control.

NameDescription
System_CAPS_pubpropertyIsNonVisual

Gets a value indicating whether the control is non-visual.

System_CAPS_pubpropertyTypeId

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Returns a value that indicates whether this instance is equal to a specified object.(Overrides Attribute.Equals(Object).)

System_CAPS_pubmethodGetHashCode()

Returns the hash code for this instance.(Overrides Attribute.GetHashCode().)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsDefaultAttribute()

Returns a value indicating whether the current instance is equivalent to a default instance of the NonVisualControlAttribute class.(Overrides Attribute.IsDefaultAttribute().)

System_CAPS_pubmethodMatch(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubfieldSystem_CAPS_staticDefault

Returns a NonVisualControlAttribute instance that represents the application-defined default value of the attribute. This field is read-only.

System_CAPS_pubfieldSystem_CAPS_staticNonVisual

Returns a NonVisualControlAttribute instance that is applied to a Web control to be treated as a non-visual control during design time. This field is read-only.

System_CAPS_pubfieldSystem_CAPS_staticVisual

Gets a NonVisualControlAttribute instance that is applied to a Web control to be treated as a visual control during design time.

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_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.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

The NonVisualControlAttribute attribute is applied to controls that are not rendered to the client, such as data source controls and the WebPartManager control. During design time, a page developer might decide to hide all non-visual controls. The designer would mark as invisible all of the controls with the NonVisualControlAttribute attribute set to true.

Examples of controls that employ the NonVisualControlAttribute attribute are DataSourceControl, HierarchicalDataSourceControl, HiddenField, and WebPartManager.

The following code example demonstrates how you can apply the NonVisualControlAttribute attribute to a class. In this example, the default NonVisualControlAttribute attribute is applied to a data source control. This is equivalent to the NonVisual field.

[NonVisualControlAttribute()]
public class CustomNonVisualControl : Control
{
    // Add an implementation of custom non-visual control.
}

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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