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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.

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

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

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

The NonVisualControlAttribute type exposes the following members.

  NameDescription
Public methodNonVisualControlAttribute()Initializes a new instance of the NonVisualControlAttribute class.
Public methodNonVisualControlAttribute(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.
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  NameDescription
Public propertyIsNonVisualGets a value indicating whether the control is non-visual.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodEqualsReturns a value that indicates whether this instance is equal to a specified object. (Overrides Attribute.Equals(Object).)
Public methodGetHashCodeReturns the hash code for this instance. (Overrides Attribute.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeReturns a value indicating whether the current instance is equivalent to a default instance of the NonVisualControlAttribute class. (Overrides Attribute.IsDefaultAttribute().)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberDefaultReturns a NonVisualControlAttribute instance that represents the application-defined default value of the attribute. This field is read-only.
Public fieldStatic memberNonVisualReturns 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.
Public fieldStatic memberVisualGets a NonVisualControlAttribute instance that is applied to a Web control to be treated as a visual control during design time.
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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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

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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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