Export (0) Print
Expand All

EditorPart Class

Serves as the base class for controls that reside in EditorZoneBase zones and are used to edit WebPart controls.

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

[BindableAttribute(false)]
public abstract class EditorPart : Part
<asp:EditorPart />

The EditorPart type exposes the following members.

  NameDescription
Protected methodEditorPartInitializes the class for use by an inherited class instance. This constructor can be called only by an inherited class.
Top

  NameDescription
Public propertyAccessKeyGets or sets the access key that allows you to quickly navigate to the Web server control. (Inherited from WebControl.)
Protected propertyAdapterGets the browser-specific adapter for the control. (Inherited from Control.)
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 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.)
Protected propertyChildControlsCreatedGets a value that indicates whether the server control's child controls have been created. (Inherited from Control.)
Public propertyChromeStateGets or sets whether a part control is in a minimized or normal state. (Inherited from Part.)
Public propertyChromeTypeGets or sets the type of border that frames a Web Parts control. (Inherited from Part.)
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.)
Protected propertyClientIDSeparatorGets a character value representing the separator character used in the ClientID property. (Inherited from Control.)
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 Part.)
Protected propertyDesignModeGets a value indicating whether a control is being used on a design surface. (Inherited from Control.)
Public propertyDirectionGets or sets the direction in which to display controls that include text in a Panel control. (Inherited from Panel.)
Public propertyDisplayGets a value that indicates whether a control should be displayed when its associated WebPart control is in edit mode.
Public propertyDisplayTitleGets a string that contains the title text displayed in the title bar of an EditorPart control.
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.)
Protected propertyEventsGets a list of event handler delegates for the control. This property is read-only. (Inherited from Control.)
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 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.)
Protected propertyHasChildViewStateGets a value indicating whether the current server control's child controls have any saved view-state settings. (Inherited from Control.)
Public propertyHeightGets or sets the height of the Web server control. (Inherited from WebControl.)
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 server control. (Inherited from Control.)
Protected propertyIdSeparatorInfrastructure. Gets the character used to separate control identifiers. (Inherited from Control.)
Protected propertyIsChildControlStateClearedGets a value indicating whether controls contained within this control have control state. (Inherited from Control.)
Protected propertyIsEnabledGets a value indicating whether the control is enabled. (Inherited from WebControl.)
Protected propertyIsTrackingViewStateGets a value that indicates whether the server control is saving changes to its view state. (Inherited from Control.)
Protected propertyIsViewStateEnabledGets a value indicating whether view state is enabled for this control. (Inherited from Control.)
Protected propertyLoadViewStateByIDGets a value indicating whether the control participates in loading its view state by ID instead of index. (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 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 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.)
Protected propertyTagKeyGets the HtmlTextWriterTag value that corresponds to this Web server control. This property is used primarily by control developers. (Inherited from WebControl.)
Protected propertyTagNameGets the name of the control tag. This property is used primarily by control developers. (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 Part.)
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.)
Protected propertyViewStateGets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page. (Inherited from Control.)
Protected propertyViewStateIgnoresCaseGets a value that indicates whether the StateBag object is case-insensitive. (Inherited from Control.)
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.)
Protected propertyWebPartManagerGets a reference to the WebPartManager control associated with the current Web page.
Protected propertyWebPartToEditGets a reference to the WebPart control that is currently being edited.
Public propertyWidthGets or sets the width of the Web server control. (Inherited from WebControl.)
Public propertyWrapGets or sets a value indicating whether the content wraps within the panel. (Inherited from Panel.)
Protected propertyZoneGets a reference to the EditorZoneBase zone that contains an EditorPart control.
Top

  NameDescription
Protected methodAddAttributesToRenderAdds information about the background image, alignment, wrap, and direction to the list of attributes to render. (Inherited from Panel.)
Protected methodAddedControlCalled after a child control is added to the Controls collection of the Control object. (Inherited from Control.)
Protected methodAddParsedSubObjectNotifies the server control that an element, either XML or HTML, was parsed, and adds the element to the server control's ControlCollection object. (Inherited from Control.)
Public methodApplyChangesSaves the values in an EditorPart control to the corresponding properties in the associated WebPart 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.)
Protected methodBeginRenderTracingBegins design-time tracing of rendering data. (Inherited from Control.)
Protected methodBuildProfileTreeInfrastructure. Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page. (Inherited from Control.)
Protected methodClearCachedClientIDInfrastructure. Sets the cached ClientID value to null. (Inherited from Control.)
Protected methodClearChildControlStateDeletes the control-state information for the server control's child controls. (Inherited from Control.)
Protected methodClearChildStateDeletes the view-state and control-state information for all the server control's child controls. (Inherited from Control.)
Protected methodClearChildViewStateDeletes the view-state information for all the server control's child controls. (Inherited from Control.)
Protected methodClearEffectiveClientIDModeInfrastructure. Sets the ClientIDMode property of the current control instance and of any child controls to Inherit. (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.)
Protected methodCreateControlCollectionCreates a new ControlCollection object to hold the child controls (both literal and server) of the server control. (Inherited from Control.)
Protected methodCreateControlStyleCreates a style object that is used internally by the Panel control to implement all style related properties. (Inherited from Panel.)
Public methodDataBind()Binds a data source to the invoked server control and all its child controls. (Inherited from Part.)
Protected methodDataBind(Boolean)Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event. (Inherited from Control.)
Protected methodDataBindChildrenBinds a data source to the server control's child controls. (Inherited from Control.)
Public methodDisposeEnables a server control to perform final clean up before it is released from memory. (Inherited from Control.)
Protected methodEndRenderTracingEnds design-time tracing of rendering data. (Inherited from Control.)
Protected methodEnsureChildControlsDetermines whether the server control contains child controls. If it does not, it creates child controls. (Inherited from Control.)
Protected methodEnsureIDCreates an identifier for controls that do not have an identifier assigned. (Inherited from Control.)
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodFindControl(String)Searches the current naming container for a server control with the specified id parameter. (Inherited from Control.)
Protected methodFindControl(String, Int32)Infrastructure. Searches the current naming container for a server control with the specified id and an integer, specified in the pathOffset parameter, which aids in the search. You should not override this version of the FindControl method. (Inherited from Control.)
Public methodFocusSets input focus to a control. (Inherited from Control.)
Protected methodGetDesignModeStateRetrieves the current state of an EditorPart control's parent zone. (Overrides Control.GetDesignModeState().)
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 methodHasEventsReturns a value indicating whether events are registered for the control or any child controls. (Inherited from Control.)
Protected methodIsLiteralContentInfrastructure. Determines if the server control holds only literal content. (Inherited from Control.)
Protected methodLoadControlStateRestores control-state information from a previous page request that was saved by the SaveControlState method. (Inherited from Control.)
Protected methodLoadViewStateRestores view-state information from a previous request that was saved with the SaveViewState method. (Inherited from WebControl.)
Protected methodMapPathSecureRetrieves the physical path that a virtual path, either absolute or relative, maps to. (Inherited from Control.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
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 methodOnBubbleEventDetermines whether the event for the server control is passed up the page's UI server control hierarchy. (Inherited from Control.)
Protected methodOnDataBindingRaises the DataBinding event. (Inherited from Control.)
Protected methodOnInitRaises the Init event. (Inherited from Control.)
Protected methodOnLoadRaises the Load event. (Inherited from Control.)
Protected methodOnPreRenderRaises the PreRender event. (Overrides Control.OnPreRender(EventArgs).)
Protected methodOnUnloadRaises the Unload event. (Inherited from Control.)
Protected methodOpenFileGets a Stream used to read a file. (Inherited from Control.)
Protected methodRaiseBubbleEventAssigns any sources of the event and its information to the control's parent. (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.)
Protected methodRenderControl(HtmlTextWriter, ControlAdapter)Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object. (Inherited from Control.)
Public methodRenderEndTagRenders the HTML closing tag of the Panel control into the specified writer. (Inherited from Panel.)
Protected methodResolveAdapterGets the control adapter responsible for rendering the specified control. (Inherited from Control.)
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 Control.)
Protected methodSaveViewStateSaves any state that was modified after the TrackViewState method was invoked. (Inherited from WebControl.)
Protected methodSetDesignModeStateApplies the characteristics of the design-mode state to the current EditorZoneBase zone that contains an EditorPart control. (Overrides Control.SetDesignModeState(IDictionary).)
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 methodSyncChangesRetrieves the property values from a WebPart control for its associated EditorPart control.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Protected methodTrackViewStateCauses the control to track changes to its view state so they can be stored in the object's ViewState property. (Inherited from WebControl.)
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 EditorPart class provides a base set of properties and methods that are used by the derived EditorPart controls provided with the Web Parts control set, and by custom EditorPart controls. An EditorPart control allows a user to edit an associated WebPart control by modifying its layout, appearance, properties, behavior, or other characteristics.

The editing user interface (UI), which consists of EditorZoneBase zones that contain EditorPart controls, is displayed after a Web page enters edit mode.

NoteNote

An EditorPart control can be used only within a zone that derives from the EditorZoneBase class, such as the EditorZone control.

After a page has entered edit mode, a user can select a WebPart control to edit by clicking an edit verb on the verbs menu of the selected control. Only one WebPart control can be edited at a time.

Several derived EditorPart controls are provided with the Web Parts control set, as listed in the following table. These controls provide all the editing capabilities that are necessary for most applications. The typical approach for using these controls in a Web Parts page is to declare them in page persistence format within a <zonetemplate> element, where <zonetemplate> is the child element of an <asp:editorzone> element. For a code example, see the Example section of this topic.

Type of control

Description

AppearanceEditorPart

Edits the appearance of the associated control, including properties such as its title text, height, width, and border attributes.

BehaviorEditorPart

Edits certain behaviors of the associated control, such as whether it can be edited, whether it can be closed, or whether it can be moved to another zone. This control is only visible on a page when a control is being edited in shared personalization scope.

LayoutEditorPart

Edits layout attributes for the associated control, such as whether it is in a normal or minimized (collapsed) state, and what zone it is placed in.

PropertyGridEditorPart

Edits properties of the associated control, if those properties were declared in the source code with a WebBrowsable attribute.

NoteNote

To improve accessibility, all the EditorPart controls provided in the Web Parts control set are rendered within a <fieldset> element. The <fieldset> element groups the related set of controls used for editing in a given EditorPart control, and it facilitates tabbed navigation among those controls for both visual user agents (such as ordinary Web browsers) and speech-oriented user agents (such as screen-reading software).

Notes to Inheritors

To create a custom EditorPart control, you must override two important methods. The ApplyChanges method applies changes made in the editor control to the WebPart control being edited. The SyncChanges method gets the current values of the WebPart control being edited, so that the editor control can edit them. Using these two critical methods, you get and set values between your custom EditorPart control and the WebPart control it is editing.

If you derive from the EditorPart class to create custom editor controls, you can add your custom controls to an EditorZoneBase zone by implementing the IWebEditable interface in a WebPart control, a user control, or a server control. For more details and a code example, see the IWebEditable class overview. Also, the code example in the Example section demonstrates how to implement IWebEditable in a custom WebPart control.

TopicLocation
How to: Set the Display Mode of a Web Parts PageBuilding ASP .NET Web Applications
How to: Set the Display Mode of a Web Parts PageBuilding ASP .NET Web Applications

The following code example demonstrates declarative and programmatic use of EditorPart controls. This code example has four parts:

  • A user control that enables you to change display modes on a Web Parts page.

  • A Web page that contains an EditorZone control, with several of the EditorPart controls from the Web Parts control set declared in the zone, and a reference to a custom WebPart control.

  • A class that contains the custom WebPart control, and a custom EditorPart control for editing a property in the WebPart control.

  • An explanation of how the example works when you load the page in a browser.

The first part of this code example is the user control that enables users to change display modes on a Web page. For details about display modes and a description of the source code in this control, see Walkthrough: Changing Display Modes on a Web Parts Page.

<%@ control language="C#" classname="DisplayModeMenuCS"%>

<script runat="server">

 // Use a field to reference the current WebPartManager.
  WebPartManager _manager;

  void Page_Init(object sender, EventArgs e)
  {
    Page.InitComplete += new EventHandler(InitComplete);
  }  

  void InitComplete(object sender, System.EventArgs e)
  {
    _manager = WebPartManager.GetCurrentWebPartManager(Page);

    String browseModeName = WebPartManager.BrowseDisplayMode.Name;

    // Fill the dropdown with the names of supported display modes.
    foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
    {
      String modeName = mode.Name;
      // Make sure a mode is enabled before adding it.
      if (mode.IsEnabled(_manager))
      {
        ListItem item = new ListItem(modeName + " Mode", modeName);
        DisplayModeDropdown.Items.Add(item);
      }
    }

  }

  // Change the page to the selected display mode.
  void DisplayModeDropdown_SelectedIndexChanged(object sender, 
    EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;

    WebPartDisplayMode mode = _manager.SupportedDisplayModes[selectedMode];
    if (mode != null)
      _manager.DisplayMode = mode;

  }

  void Page_PreRender(object sender, EventArgs e)
  {
    DisplayModeDropdown.SelectedValue = _manager.DisplayMode.Name;
  }

</script>
<div>
  <asp:DropDownList ID="DisplayModeDropdown" 
    runat="server"  
    AutoPostBack="true" 
    OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
</div>

The second part of the code example is the Web page. It contains a declarative reference to an EditorZone control, with a child <zonetemplate> element that contains declarative references to two of the Web Parts control set EditorPart controls. The page also references a custom WebPart control, using a Register directive for the assembly, and the <aspSample:TextDisplayWebPart> element for the control.

<%@ page language="c#" %>
<%@ register TagPrefix="uc1" 
  TagName="DisplayModeMenu" 
  Src="DisplayModecs.ascx" %>
<%@ register tagprefix="aspSample" 
  Namespace="Samples.AspNet.CS.Controls" 
  Assembly="TextDisplayWebPartCS" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>
      Text Display WebPart with EditorPart
    </title>
  </head>
  <body>
    <form id="form1" runat="server">
      <asp:webpartmanager id="WebPartManager1" runat="server" />
      <uc1:DisplayModeMenu ID="DisplayModeMenu1" runat="server" />
      <asp:webpartzone id="zone1" runat="server" 
        CloseVerb-Enabled="false">
        <zonetemplate>
          <aspSample:TextDisplayWebPart 
            runat="server"   
            id="textwebpart" 
            title = "Text Content WebPart" />          
        </zonetemplate>
      </asp:webpartzone> 
      <asp:EditorZone ID="EditorZone1" runat="server">
        <ZoneTemplate>
          <asp:AppearanceEditorPart ID="AppearanceEditorPart1" 
            runat="server" />
          <asp:LayoutEditorPart ID="LayoutEditorPart1" 
            runat="server" />
        </ZoneTemplate>      
      </asp:EditorZone>
    </form>
  </body>
</html>

The third part of the code example is a custom WebPart class named TextDisplayWebPart. The class implements the IWebEditable interface. Within this class is a nested, private class that contains the code for a private EditorPart class associated with the TextDisplayWebPart class and named TextDisplayEditorPart. At run time, as the TextDisplayWebPart control enters edit mode, in its TextDisplayWebPart.CreateEditorParts method, it creates an instance of the TextDisplayEditorPart class, and displays it in the EditorZone control, along with the other EditorPart controls.

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class TextDisplayWebPart : WebPart
  {
    private String _contentText = null;
    private String _fontStyle = null;
    TextBox input;
    Label DisplayContent;
    Literal lineBreak;

    public override EditorPartCollection CreateEditorParts()
    {
      ArrayList editorArray = new ArrayList();
      TextDisplayEditorPart edPart = new TextDisplayEditorPart();
      edPart.ID = this.ID + "_editorPart1";
      editorArray.Add(edPart);
      EditorPartCollection editorParts = 
        new EditorPartCollection(editorArray);
      return editorParts;
    }

    public override object WebBrowsableObject
    {
      get { return this; }
    }

    [Personalizable(), WebBrowsable]
    public String ContentText
    {
      get { return _contentText; }
      set { _contentText = value; }
    }

    [Personalizable(), WebBrowsable()]
    public String FontStyle
    {
      get { return _fontStyle; }
      set { _fontStyle = value; }
    }

    protected override void CreateChildControls()
    {
      Controls.Clear();
      DisplayContent = new Label();
      DisplayContent.BackColor = Color.LightBlue;
      DisplayContent.Text = this.ContentText;
      if (FontStyle == null)
        FontStyle = "None";
      SetFontStyle(DisplayContent, FontStyle);
      this.Controls.Add(DisplayContent);

      lineBreak = new Literal();
      lineBreak.Text = @"<br />";
      Controls.Add(lineBreak);

      input = new TextBox();
      this.Controls.Add(input);
      Button update = new Button();
      update.Text = "Set Label Content";
      update.Click += new EventHandler(this.submit_Click);
      this.Controls.Add(update);

    }

    private void submit_Click(object sender, EventArgs e)
    {
      // Update the label string. 
      if (input.Text != String.Empty)
      {
        _contentText = input.Text + @"<br />";
        input.Text = String.Empty;
        DisplayContent.Text = this.ContentText;
      }
    }

    private void SetFontStyle(Label label, String selectedStyle)
    {
      if (selectedStyle == "Bold")
      {
        label.Font.Bold = true;
        label.Font.Italic = false;
        label.Font.Underline = false;
      }
      else if (selectedStyle == "Italic")
      {
        label.Font.Italic = true;
        label.Font.Bold = false;
        label.Font.Underline = false;
      }
      else if (selectedStyle == "Underline")
      {
        label.Font.Underline = true;
        label.Font.Bold = false;
        label.Font.Italic = false;
      }
      else
      {
        label.Font.Bold = false;
        label.Font.Italic = false;
        label.Font.Underline = false;
      }
    }

    // Create a custom EditorPart to edit the WebPart control.
    [AspNetHostingPermission(SecurityAction.Demand,
      Level = AspNetHostingPermissionLevel.Minimal)]
    private class TextDisplayEditorPart : EditorPart
    {
      DropDownList _partContentFontStyle;

      public TextDisplayEditorPart()
      {
        Title = "Font Face";
      }

      public override bool ApplyChanges()
      {
        TextDisplayWebPart part = 
          (TextDisplayWebPart)WebPartToEdit;
        // Update the custom WebPart control with the font style.
        part.FontStyle = PartContentFontStyle.SelectedValue;

        return true;
      }

      public override void SyncChanges()
      {
        TextDisplayWebPart part = 
          (TextDisplayWebPart)WebPartToEdit;
        String currentStyle = part.FontStyle;

        // Select the current font style in the drop-down control. 
        foreach (ListItem item in PartContentFontStyle.Items)
        {
          if (item.Value == currentStyle)
          {
            item.Selected = true;
            break;
          }
        }
      }


      protected override void CreateChildControls()
      {
        Controls.Clear();

        // Add a set of font styles to the dropdown list.
        _partContentFontStyle = new DropDownList();
        _partContentFontStyle.Items.Add("Bold");
        _partContentFontStyle.Items.Add("Italic");
        _partContentFontStyle.Items.Add("Underline");
        _partContentFontStyle.Items.Add("None");

        Controls.Add(_partContentFontStyle);

      }

      protected override void RenderContents(HtmlTextWriter writer)
      {
        writer.Write("<b>Text Content Font Style</b>");
        writer.WriteBreak();
        writer.Write("Select a font style.");
        writer.WriteBreak();
        _partContentFontStyle.RenderControl(writer);
        writer.WriteBreak();
      }

      // Access the drop-down control through a property. 
      private DropDownList PartContentFontStyle
      {
        get 
        {
          EnsureChildControls();
          return _partContentFontStyle;
        }
      }
    }
  }
}

Load the page in a browser, and on the Display Mode control, select Edit Mode to switch to edit mode. Click the verbs menu (the downward arrow) in the title bar of the TextDisplayWebPart control, and click Edit to edit the control. When the editing UI is visible, you can see three EditorPart controls, including the custom one that enables you to edit the TextDisplayWebPart.FontStyle property. If you make some changes in the editing UI and click the Apply button, you can use the drop-down list control to return the page to browse mode and see the full effect of the editing changes.

.NET Framework

Supported in: 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