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.NET Framework 4.5

.NET Framework Class Library

System.Web Namespaces

System.Web.UI.WebControls.WebParts

AppearanceEditorPart Class

BehaviorEditorPart Class

CatalogPart Class

CatalogPartChrome Class

CatalogPartCollection Class

CatalogZone Class

CatalogZoneBase Class

ConnectionConsumerAttribute Class

ConnectionInterfaceCollection Class

ConnectionPoint Class

ConnectionProviderAttribute Class

ConnectionsZone Class

ConsumerConnectionPoint Class

ConsumerConnectionPointCollection Class

DeclarativeCatalogPart Class

EditorPart Class

EditorPartChrome Class

EditorPartCollection Class

EditorZone Class

EditorZoneBase Class

ErrorWebPart Class

FieldCallback Delegate

GenericWebPart Class

ImportCatalogPart Class

IPersonalizable Interface

ITrackingPersonalizable Interface

ITransformerConfigurationControl Interface

IVersioningPersonalizable Interface

IWebActionable Interface

IWebEditable Interface

IWebPart Interface

IWebPartField Interface

IWebPartParameters Interface

IWebPartRow Interface

IWebPartTable Interface

LayoutEditorPart Class

PageCatalogPart Class

ParametersCallback Delegate

Part Class

PartChromeState Enumeration

PartChromeType Enumeration

PersonalizableAttribute Class

PersonalizationAdministration Class

PersonalizationDictionary Class

PersonalizationEntry Class

PersonalizationProvider Class

PersonalizationProviderCollection Class

PersonalizationScope Enumeration

PersonalizationState Class

PersonalizationStateInfo Class

PersonalizationStateInfoCollection Class

PersonalizationStateQuery Class

PropertyGridEditorPart Class

ProviderConnectionPoint Class

ProviderConnectionPointCollection Class

ProxyWebPart Class

ProxyWebPartConnectionCollection Class

ProxyWebPartManager Class

RowCallback Delegate

RowToFieldTransformer Class

RowToParametersTransformer Class

SharedPersonalizationStateInfo Class

SqlPersonalizationProvider Class

TableCallback Delegate

TitleStyle Class

TransformerTypeCollection Class

UnauthorizedWebPart Class

UserPersonalizationStateInfo Class

WebBrowsableAttribute Class

WebDescriptionAttribute Class

WebDisplayNameAttribute Class

WebPart Class

WebPartAddingEventArgs Class

WebPartAddingEventHandler Delegate

WebPartAuthorizationEventArgs Class

WebPartAuthorizationEventHandler Delegate

WebPartCancelEventArgs Class

WebPartCancelEventHandler Delegate

WebPartChrome Class

WebPartCollection Class

WebPartConnection Class

WebPartConnectionCollection Class

WebPartConnectionsCancelEventArgs Class

WebPartConnectionsCancelEventHandler Delegate

WebPartConnectionsEventArgs Class

WebPartConnectionsEventHandler Delegate

WebPartDescription Class

WebPartDescriptionCollection Class

WebPartDisplayMode Class

WebPartDisplayModeCancelEventArgs Class

WebPartDisplayModeCancelEventHandler Delegate

WebPartDisplayModeCollection Class

WebPartDisplayModeEventArgs Class

WebPartDisplayModeEventHandler Delegate

WebPartEventArgs Class

WebPartEventHandler Delegate

WebPartExportMode Enumeration

WebPartHelpMode Enumeration

WebPartManager Class

WebPartManagerInternals Class

WebPartMenuStyle Class

WebPartMovingEventArgs Class

WebPartMovingEventHandler Delegate

WebPartPersonalization Class

WebPartTracker Class

WebPartTransformer Class

WebPartTransformerAttribute Class

WebPartTransformerCollection Class

WebPartUserCapability Class

WebPartVerb Class

WebPartVerbCollection Class

WebPartVerbRenderMode Enumeration

WebPartVerbsEventArgs Class

WebPartVerbsEventHandler Delegate

WebPartZone Class

WebPartZoneBase Class

WebPartZoneCollection Class

WebZone Class

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WebPartAddingEventHandler Delegate

.NET Framework 4.5

Represents the method that handles the WebPartAdding event of a WebPartManager object.

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

public delegate void WebPartAddingEventHandler(
	Object sender,
	WebPartAddingEventArgs e
)

Parameters

sender: Type: System.Object
The source of the event.

e: Type: System.Web.UI.WebControls.WebParts.WebPartAddingEventArgs
A WebPartAddingEventArgs that contains the event data.

The WebPartAdding event is raised by the OnWebPartAdding method just before adding a control to a Web Parts zone. This event provides an opportunity to cancel the process before it is complete. The WebPartAdded event is called after a control has been added to a Web Parts zone.

The method specified in the WebPartAddingEventHandler delegate is called when a WebPartAdding event is raised.

Page developers can provide custom handlers for the event by adding the OnWebPartAdding attribute to the <asp:webpartmanager> element in a page, and assigning a custom method name to the attribute. A custom handler can also be assigned programmatically. For more information on programmatically assigning an event handler, see How to: Connect Event Handler Methods to Events.

Version Information

.NET Framework

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

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.

Reference

System.Web.UI.WebControls.WebParts Namespace

OnWebPartAdding

WebPartAddingEventArgs

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