Export (0) Print
Expand All

UnauthorizedWebPart Class

Used to create a placeholder object whenever the WebPartManager control's IsAuthorized method returns false for a WebPart control. This class cannot be inherited.

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

public sealed class UnauthorizedWebPart : ProxyWebPart
<asp:UnauthorizedWebPart />

The UnauthorizedWebPart type exposes the following members.

  NameDescription
Public methodUnauthorizedWebPart(WebPart)Initializes a new instance of an UnauthorizedWebPart control, called when a static WebPart control (or server or user control) fails authorization.
Public methodUnauthorizedWebPart(String, String, String, String)Initializes a new instance of an UnauthorizedWebPart control, called when a dynamic WebPart control (or server or user control) fails authorization.
Top

  NameDescription
Public propertyAccessKeyGets or sets the access key that allows you to quickly navigate to the Web server control. (Inherited from WebControl.)
Public propertyAllowCloseGets or sets a value indicating whether an end user can close a WebPart control on a Web page. (Inherited from WebPart.)
Public propertyAllowConnectGets or sets a value that indicates whether the WebPart control allows other controls to form connections with it. (Inherited from WebPart.)
Public propertyAllowEditGets or sets a value indicating whether an end user can modify a WebPart control through the user interface (UI) provided by one or more EditorPart controls. (Inherited from WebPart.)
Public propertyAllowHideGets or sets a value indicating whether end users are allowed to hide a WebPart control. (Inherited from WebPart.)
Public propertyAllowMinimizeGets or sets a value indicating whether end users can minimize a WebPart control. (Inherited from WebPart.)
Public propertyAllowZoneChangeGets or sets a value indicating whether a user can move a WebPart control between WebPartZoneBase zones. (Inherited from WebPart.)
Public propertyAppRelativeTemplateSourceDirectoryGets or sets the application-relative virtual directory of the Page or UserControl object that contains this control. (Inherited from Control.)
Public propertyAttributesGets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control. (Inherited from WebControl.)
Public propertyAuthorizationFilterGets or sets an arbitrary string to determine whether a WebPart control is authorized to be added to a page. (Inherited from WebPart.)
Public propertyBackColorGets or sets the background color of the Web server control. (Inherited from WebControl.)
Public propertyBackImageUrlGets or sets the URL of the background image for the panel control. (Inherited from Panel.)
Public propertyBindingContainerInfrastructure. Gets the control that contains this control's data binding. (Inherited from Control.)
Public propertyBorderColorGets or sets the border color of the Web control. (Inherited from WebControl.)
Public propertyBorderStyleGets or sets the border style of the Web server control. (Inherited from WebControl.)
Public propertyBorderWidthGets or sets the border width of the Web server control. (Inherited from WebControl.)
Public propertyCatalogIconImageUrlGets or sets the URL to an image that represents a Web Parts control in a catalog of controls. (Inherited from WebPart.)
Public propertyChromeStateGets or sets whether a part control is in a minimized or normal state. (Inherited from WebPart.)
Public propertyChromeTypeGets or sets the type of border that frames a Web Parts control. (Inherited from WebPart.)
Public propertyClientIDGets the control ID for HTML markup that is generated by ASP.NET. (Inherited from Control.)
Public propertyClientIDModeGets or sets the algorithm that is used to generate the value of the ClientID property. (Inherited from Control.)
Public propertyConnectErrorMessageGets an error message to display to users if errors occur during the connection process. (Inherited from WebPart.)
Protected propertyContextGets the HttpContext object associated with the server control for the current Web request. (Inherited from Control.)
Public propertyControlsInfrastructure. Gets a ControlCollection object that contains the child controls for a specified server control in the user interface hierarchy. (Inherited from Part.)
Public propertyControlStyleGets the style of the Web server control. This property is used primarily by control developers. (Inherited from WebControl.)
Public propertyControlStyleCreatedGets a value indicating whether a Style object has been created for the ControlStyle property. This property is primarily used by control developers. (Inherited from WebControl.)
Public propertyCssClassGets or sets the Cascading Style Sheet (CSS) class rendered by the Web server control on the client. (Inherited from WebControl.)
Public propertyDataItemContainerGets a reference to the naming container if the naming container implements IDataItemContainer. (Inherited from Control.)
Public propertyDataKeysContainerGets a reference to the naming container if the naming container implements IDataKeysControl. (Inherited from Control.)
Public propertyDefaultButtonGets or sets the identifier for the default button that is contained in the Panel control. (Inherited from Panel.)
Public propertyDescriptionGets or sets a brief phrase that summarizes what the part control does, for use in ToolTips and catalogs of part controls. (Inherited from WebPart.)
Protected propertyDesignModeGets a value indicating whether a control is being used on a design surface. (Inherited from Control.)
Public propertyDirectionGets or sets the horizontal direction that content flows within the control. (Inherited from WebPart.)
Public propertyDisplayTitleGets a string that contains the full title text actually displayed in the title bar of a WebPart control instance. (Inherited from WebPart.)
Public propertyEnabledGets or sets a value indicating whether the Web server control is enabled. (Inherited from WebControl.)
Public propertyEnableThemingGets or sets a value indicating whether themes apply to this control. (Inherited from WebControl.)
Public propertyEnableViewStateGets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client. (Inherited from Control.)
Public propertyExportModeGets or sets whether all, some, or none of a WebPart control's properties can be exported. (Inherited from WebPart.)
Public propertyFontGets the font properties associated with the Web server control. (Inherited from WebControl.)
Public propertyForeColorGets or sets the foreground color (typically the color of the text) of the Web server control. (Inherited from WebControl.)
Public propertyGenericWebPartIDGets the value of the ID property from the generic Web Parts control replaced by a proxy Web Parts control. (Inherited from ProxyWebPart.)
Public propertyGroupingTextGets or sets the caption for the group of controls that is contained in the panel control. (Inherited from Panel.)
Public propertyHasAttributesGets a value indicating whether the control has attributes set. (Inherited from WebControl.)
Public propertyHasSharedDataGets a value that indicates whether a WebPart control has any shared personalization data associated with it. (Inherited from WebPart.)
Public propertyHasUserDataGets a value that indicates whether a WebPart control has any user personalization data associated with it. (Inherited from WebPart.)
Public propertyHeightGets or sets the height of a zone. (Inherited from WebPart.)
Public propertyHelpModeGets or sets the type of user interface (UI) used to display Help content for a WebPart control. (Inherited from WebPart.)
Public propertyHelpUrlGets or sets the URL to a Help file for a WebPart control. (Inherited from WebPart.)
Public propertyHiddenGets or sets a value indicating whether a WebPart control is displayed on a Web page. (Inherited from WebPart.)
Public propertyHorizontalAlignGets or sets the horizontal alignment of the contents within the panel. (Inherited from Panel.)
Public propertyIDGets or sets the programmatic identifier assigned to the Web Parts control. (Inherited from ProxyWebPart.)
Public propertyImportErrorMessageGets or sets an error message that is used if errors occur when a WebPart control is imported. (Inherited from WebPart.)
Protected propertyIsChildControlStateClearedGets a value indicating whether controls contained within this control have control state. (Inherited from Control.)
Public propertyIsClosedGets a value that indicates whether a WebPart control is currently closed on a Web Parts page. (Inherited from WebPart.)
Protected propertyIsEnabledGets a value indicating whether the control is enabled. (Inherited from WebControl.)
Public propertyIsSharedGets a value that indicates whether a WebPart control is shared, meaning that it is visible to all users of a Web Parts page. (Inherited from WebPart.)
Public propertyIsStandaloneGets a value that indicates whether a WebPart control is standalone, meaning that it is not contained within a WebPartZoneBase zone. (Inherited from WebPart.)
Public propertyIsStaticGets a value that indicates whether a WebPart control is a static control, which means the control is declared in the markup of a Web Parts page and not added to the page programmatically. (Inherited from WebPart.)
Protected propertyIsViewStateEnabledGets a value indicating whether view state is enabled for this control. (Inherited from Control.)
Public propertyNamingContainerGets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same Control.ID property value. (Inherited from Control.)
Public propertyOriginalIDGets the ID of the Web Parts control replaced by the proxy Web Parts control. (Inherited from ProxyWebPart.)
Public propertyOriginalPathGets the path to the user control being replaced. (Inherited from ProxyWebPart.)
Public propertyOriginalTypeNameGets the Type of the Web Parts control replaced by the proxy Web Parts control. (Inherited from ProxyWebPart.)
Public propertyPageGets a reference to the Page instance that contains the server control. (Inherited from Control.)
Public propertyParentGets a reference to the server control's parent control in the page control hierarchy. (Inherited from Control.)
Public propertyRenderingCompatibilityGets a value that specifies the ASP.NET version that rendered HTML will be compatible with. (Inherited from Control.)
Public propertyScrollBarsGets or sets the visibility and position of scroll bars in a Panel control. (Inherited from Panel.)
Public propertySiteGets information about the container that hosts the current control when rendered on a design surface. (Inherited from Control.)
Public propertySkinIDGets or sets the skin to apply to the control. (Inherited from WebControl.)
Public propertyStyleGets a collection of text attributes that will be rendered as a style attribute on the outer tag of the Web server control. (Inherited from WebControl.)
Public propertySubtitleGets a string that is concatenated with the Title property value to form a complete title for a WebPart control. (Inherited from WebPart.)
Public propertySupportsDisabledAttributeGets a value that indicates whether the control should set the disabled attribute of the rendered HTML element to "disabled" when the control's IsEnabled property is false. (Inherited from Panel.)
Public propertyTabIndexGets or sets the tab index of the Web server control. (Inherited from WebControl.)
Public propertyTemplateControlGets or sets a reference to the template that contains this control. (Inherited from Control.)
Public propertyTemplateSourceDirectoryGets the virtual directory of the Page or UserControl that contains the current server control. (Inherited from Control.)
Public propertyTitleGets or sets the title of a part control. (Inherited from WebPart.)
Public propertyTitleIconImageUrlGets or sets the URL to an image used to represent a Web Parts control in the control's title bar. (Inherited from WebPart.)
Public propertyTitleUrlGets or sets a URL to supplemental information about a WebPart control. (Inherited from WebPart.)
Public propertyToolTipGets or sets the text displayed when the mouse pointer hovers over the Web server control. (Inherited from WebControl.)
Public propertyUniqueIDGets the unique, hierarchically qualified identifier for the server control. (Inherited from Control.)
Public propertyValidateRequestModeGets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values. (Inherited from Control.)
Public propertyVerbsGets a collection of custom verbs associated with a WebPart control. (Inherited from WebPart.)
Public propertyViewStateModeGets or sets the view-state mode of this control. (Inherited from Control.)
Public propertyVisibleGets or sets a value that indicates whether a server control is rendered as UI on the page. (Inherited from Control.)
Public propertyWebBrowsableObjectGets a reference to the WebPart control to enable it to be edited by custom EditorPart controls. (Inherited from WebPart.)
Public propertyWidthGets or sets the width of the Web server control. (Inherited from WebPart.)
Public propertyWrapGets or sets a value indicating whether the content wraps within the panel. (Inherited from Panel.)
Public propertyZoneGets the WebPartZoneBase zone that currently contains a WebPart control. (Inherited from WebPart.)
Public propertyZoneIndexGets the index position of a WebPart control within its zone. (Inherited from WebPart.)
Top

  NameDescription
Protected methodAddedControlCalled after a child control is added to the Controls collection of the Control object. (Inherited from Control.)
Public methodApplyStyleCopies any nonblank elements of the specified style to the Web control, overwriting any existing style elements of the control. This method is primarily used by control developers. (Inherited from WebControl.)
Public methodApplyStyleSheetSkinApplies the style properties defined in the page style sheet to the control. (Inherited from Control.)
Public methodCopyBaseAttributesCopies the properties not encapsulated by the Style object from the specified Web server control to the Web server control that this method is called from. This method is used primarily by control developers. (Inherited from WebControl.)
Protected methodCreateChildControlsCalled by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering. (Inherited from Control.)
Public methodCreateEditorPartsReturns a collection of custom EditorPart controls that can be used to edit a WebPart control when it is in edit mode. (Inherited from WebPart.)
Public methodDataBind()Binds a data source to the invoked server control and all its child controls. (Inherited from Part.)
Public methodDisposeEnables a server control to perform final clean up before it is released from memory. (Inherited from Control.)
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodFindControl(String)Searches the current naming container for a server control with the specified id parameter. (Inherited from Control.)
Public methodFocusSets input focus to a control. (Inherited from Control.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetRouteUrl(Object)Gets the URL that corresponds to a set of route parameters. (Inherited from Control.)
Public methodGetRouteUrl(RouteValueDictionary)Gets the URL that corresponds to a set of route parameters. (Inherited from Control.)
Public methodGetRouteUrl(String, Object)Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control.)
Public methodGetRouteUrl(String, RouteValueDictionary)Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodGetUniqueIDRelativeToReturns the prefixed portion of the UniqueID property of the specified control. (Inherited from Control.)
Public methodHasControlsDetermines if the server control contains any child controls. (Inherited from Control.)
Protected methodLoadControlStateOverrides LoadControlState to prevent loading previously saved state for a ProxyWebPart object. (Inherited from ProxyWebPart.)
Protected methodMapPathSecureRetrieves the physical path that a virtual path, either absolute or relative, maps to. (Inherited from Control.)
Public methodMergeStyleCopies any nonblank elements of the specified style to the Web control, but will not overwrite any existing style elements of the control. This method is used primarily by control developers. (Inherited from WebControl.)
Protected methodOnClosingEnables derived classes to provide custom handling when a WebPart control is closed on a Web Parts page. (Inherited from WebPart.)
Protected methodOnConnectModeChangedEnables derived classes to provide custom handling when a WebPart control is beginning or ending the process of connecting to other controls. (Inherited from WebPart.)
Protected methodOnDeletingEnables derived classes to provide custom handling when a WebPart control is permanently removed from a Web Parts page. (Inherited from WebPart.)
Protected methodOnEditModeChangedEnables derived classes to provide custom handling when a WebPart control is entering or leaving edit mode. (Inherited from WebPart.)
Protected methodOnInitRaises the Init event. (Inherited from Control.)
Protected methodOnLoadRaises the Load event. (Inherited from Control.)
Protected methodOnPreRenderRaises the PreRender event. (Inherited from Control.)
Protected methodOnUnloadRaises the Unload event. (Inherited from Control.)
Protected methodOpenFileGets a Stream used to read a file. (Inherited from Control.)
Protected methodRemovedControlCalled after a child control is removed from the Controls collection of the Control object. (Inherited from Control.)
Protected methodRenderRenders the control to the specified HTML writer. (Inherited from WebControl.)
Public methodRenderBeginTagRenders the HTML opening tag of the Panel control to the specified writer. (Inherited from Panel.)
Protected methodRenderChildrenOutputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client. (Inherited from Control.)
Protected methodRenderContentsRenders the contents of the control to the specified writer. This method is used primarily by control developers. (Inherited from WebControl.)
Public methodRenderControl(HtmlTextWriter)Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled. (Inherited from Control.)
Public methodRenderEndTagRenders the HTML closing tag of the Panel control into the specified writer. (Inherited from Panel.)
Public methodResolveClientUrlGets a URL that can be used by the browser. (Inherited from Control.)
Public methodResolveUrlConverts a URL into one that is usable on the requesting client. (Inherited from Control.)
Protected methodSaveControlStateSaves any server control state changes that have occurred since the time the page was posted back to the server. (Inherited from ProxyWebPart.)
Public methodSetRenderMethodDelegateInfrastructure. Assigns an event handler delegate to render the server control and its content into its parent control. (Inherited from Control.)
Public methodSetTraceData(Object, Object)Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value. (Inherited from Control.)
Public methodSetTraceData(Object, Object, Object)Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value. (Inherited from Control.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Top

  NameDescription
Public eventDataBindingOccurs when the server control binds to a data source. (Inherited from Control.)
Public eventDisposedOccurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested. (Inherited from Control.)
Public eventInitOccurs when the server control is initialized, which is the first step in its lifecycle. (Inherited from Control.)
Public eventLoadOccurs when the server control is loaded into the Page object. (Inherited from Control.)
Public eventPreRenderOccurs after the Control object is loaded but prior to rendering. (Inherited from Control.)
Public eventUnloadOccurs when the server control is unloaded from memory. (Inherited from Control.)
Top

  NameDescription
Public Extension MethodFindDataSourceControlReturns the data source that is associated with the data control for the specified control. (Defined by DynamicDataExtensions.)
Public Extension MethodFindFieldTemplateReturns the field template for the specified column in the specified control's naming container. (Defined by DynamicDataExtensions.)
Public Extension MethodFindMetaTableReturns the metatable object for the containing data control. (Defined by DynamicDataExtensions.)
Top

  NameDescription
Explicit interface implemetationPrivate methodIAttributeAccessor.GetAttributeInfrastructure. Gets an attribute of the Web control with the specified name. (Inherited from WebControl.)
Explicit interface implemetationPrivate methodIAttributeAccessor.SetAttributeSets an attribute of the Web control to the specified name and value. (Inherited from WebControl.)
Explicit interface implemetationPrivate methodICompositeControlDesignerAccessor.RecreateChildControlsAllows the developer of a designer for a composite part control to recreate the control's child controls on the design surface. (Inherited from Part.)
Explicit interface implemetationPrivate propertyIControlBuilderAccessor.ControlBuilderFor a description of this member, see IControlBuilderAccessor.ControlBuilder. (Inherited from Control.)
Explicit interface implemetationPrivate methodIControlDesignerAccessor.GetDesignModeStateFor a description of this member, see IControlDesignerAccessor.GetDesignModeState. (Inherited from Control.)
Explicit interface implemetationPrivate methodIControlDesignerAccessor.SetDesignModeStateFor a description of this member, see IControlDesignerAccessor.SetDesignModeState. (Inherited from Control.)
Explicit interface implemetationPrivate methodIControlDesignerAccessor.SetOwnerControlInfrastructure. For a description of this member, see IControlDesignerAccessor.SetOwnerControl. (Inherited from Control.)
Explicit interface implemetationPrivate propertyIControlDesignerAccessor.UserDataFor a description of this member, see IControlDesignerAccessor.UserData. (Inherited from Control.)
Explicit interface implemetationPrivate propertyIDataBindingsAccessor.DataBindingsFor a description of this member, see IDataBindingsAccessor.DataBindings. (Inherited from Control.)
Explicit interface implemetationPrivate propertyIDataBindingsAccessor.HasDataBindingsFor a description of this member, see IDataBindingsAccessor.HasDataBindings. (Inherited from Control.)
Explicit interface implemetationPrivate propertyIExpressionsAccessor.ExpressionsFor a description of this member, see IExpressionsAccessor.Expressions. (Inherited from Control.)
Explicit interface implemetationPrivate propertyIExpressionsAccessor.HasExpressionsFor a description of this member, see IExpressionsAccessor.HasExpressions. (Inherited from Control.)
Explicit interface implemetationPrivate methodIParserAccessor.AddParsedSubObjectFor a description of this member, see IParserAccessor.AddParsedSubObject. (Inherited from Control.)
Top

The Web Parts control set provides an authorization mechanism for determining whether individual WebPart controls can be added to a page. Developers can optionally assign an arbitrary string to the AuthorizationFilter property on a WebPart control. When the WebPartManager control is adding controls to a page, it checks this filter value against criteria set by the developer, by using the IsAuthorized method, and returns false if a control is not authorized.

NoteNote

This mechanism also works with server controls and user controls that are placed in WebPartZoneBase zones, because these controls are wrapped with a GenericWebPart object at run time, and this object inherits the AuthorizationFilter property.

When a WebPart control is not authorized, the WebPartManager control inserts an UnauthorizedWebPart control into the control tree of the page in place of the unauthorized control. An UnauthorizedWebPart control in the control tree reserves the position of the unauthorized control in the page, and prevents any personalization data that a user might have previously applied to the WebPart control from being lost.

The UnauthorizedWebPart control is never displayed on a page in which it is inserted, nor does it appear in the source code for the rendered page. Developers can verify its presence in the page control tree by checking the WebParts property of the WebPartManager control.

The following code example demonstrates the use of the UnauthorizedWebPart control.

The first part of the code example is a custom WebPartManager control that overrides the IsAuthorized(WebPart) method to create custom authorization criteria. Any WebPart control that has its AuthorizationFilter property set to a specific value, or any control that has no value assigned to the property, will be authorized, and controls not meeting these criteria will not be authorized.

using System;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace Samples.AspNet.CS.Controls
{
  public class MyManagerAuthorize : WebPartManager
  {
    public override bool IsAuthorized(Type type, string path, string authorizationFilter, bool isShared)
    {
      if (!String.IsNullOrEmpty(authorizationFilter))
      {
        if (authorizationFilter == "admin")
          return true;
        else 
          return false;
      }
      else 
        return true;

    }
  }
}

The second part of the code example is the Web page that hosts the custom WebPartManager control. There are three static server controls declared within the <asp:webpartzone> element. Although these controls are not actually WebPart controls, they will be wrapped with a GenericWebPart object at run time, so you can treat them as WebPart controls and thus assign values to their AuthorizationFilter properties. Notice that the BulletedList control has its filter set to the value that should enable it to be authorized, according to the criteria in the custom WebPartManager control. The Label control has a filter value that should cause it not to be authorized. The Calendar control does not assign a value to the property, so by default it should be authorized.

<%@ Page Language="C#" %>
<%@ Register TagPrefix="aspSample"
    Namespace="Samples.AspNet.CS.Controls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  protected void Page_Load(object sender, EventArgs e)
  {
    foreach (WebPart part in mgr1.WebParts)
    {
      if (mgr1.IsAuthorized(part))
        part.ExportMode = WebPartExportMode.All;
    }

  }

  protected void Button1_Click(object sender, EventArgs e)
  {
    Label2.Text = String.Empty;

    foreach (WebPart part in mgr1.WebParts)
      Label2.Text += part.ID + "<br />";
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <aspSample:MyManagerAuthorize ID="mgr1" runat="server" />
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            ID="BulletedList1" 
            Runat="server"
            DisplayMode="HyperLink" 
            Title="Favorite Links"
            AuthorizationFilter="admin">
            <asp:ListItem Value="http://msdn.microsoft.com">
              MSDN
            </asp:ListItem>
            <asp:ListItem Value="http://www.asp.net">
              ASP.NET
            </asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">
              MSN
            </asp:ListItem>
          </asp:BulletedList>
          <asp:Label ID="Label1" runat="server" 
            Text="Hello World"
            AuthorizationFilter="user" />
          <asp:Calendar ID="Calendar1" runat="server"></asp:Calendar>
        </ZoneTemplate>
      </asp:WebPartZone>
      <hr />
      <asp:Button ID="Button1" runat="server" 
        Text="List WebPart Controls" OnClick="Button1_Click" />
      <br />
      <asp:Label ID="Label2" runat="server" 
        Text="" />
    </div>
    </form>
</body>
</html>

The third part of the code example is a setting you must add in the Web.config file to enable exporting Web Parts description files. Ensure that you have a Web.config file in the same directory as the Web page for this code example. Within the <system.web> section, make sure there is a <webParts> element with an enableExport attribute set to true, as in the following markup.

<webParts enableExport="true">

...

</webParts>

Load the page in a browser, and notice that the BulletedList and Calendar controls are rendered as expected, but the Label control is not rendered because it was not authorized. Clicking the List WebPart Controls button causes the WebPartManager control to list the IDs of all controls in its WebParts collection. Note that the ID for the Label control is listed, proving that an UnauthorizedWebPart control was added to the page control tree to hold its place, even though the label is not rendered in the page.

.NET Framework

Supported in: 4.6, 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.
Show:
© 2014 Microsoft