Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / WebPart.cs / 1 / WebPart.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Web.UI.WebControls.WebParts {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Globalization;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Util;
//
///
/// Adds several features to the Part class, including connections, personalization behavior,
/// and additional UI properties.
///
[
Designer("System.Web.UI.Design.WebControls.WebParts.WebPartDesigner, " + AssemblyRef.SystemDesign)
]
[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
public abstract class WebPart : Part, IWebPart, IWebActionable, IWebEditable {
private WebPartManager _webPartManager;
private string _zoneID;
private int _zoneIndex;
private WebPartZoneBase _zone;
private bool _allowClose;
private bool _allowConnect;
private bool _allowEdit;
private bool _allowHide;
private bool _allowMinimize;
private bool _allowZoneChange;
private string _authorizationFilter;
private string _catalogIconImageUrl;
private PartChromeState _chromeState;
private string _connectErrorMessage;
private WebPartExportMode _exportMode;
private WebPartHelpMode _helpMode;
private string _helpUrl;
private bool _hidden;
private string _importErrorMessage;
private string _titleIconImageUrl;
private string _titleUrl;
private bool _hasUserData;
private bool _hasSharedData;
private bool _isClosed;
private bool _isShared;
private bool _isStandalone;
private bool _isStatic;
// Counter to detect circular connections
private Dictionary _trackerCounter;
internal const string WholePartIDPrefix = "WebPart_";
private const string titleBarIDPrefix = "WebPartTitle_";
protected WebPart() {
_allowClose = true;
_allowConnect = true;
_allowEdit = true;
_allowHide = true;
_allowMinimize = true;
_allowZoneChange = true;
_chromeState = PartChromeState.Normal;
_exportMode = WebPartExportMode.None;
_helpMode = WebPartHelpMode.Navigate;
_isStatic = true;
_isStandalone = true;
}
///
/// Whether the user is allowed to close the web part
///
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowClose),
]
public virtual bool AllowClose {
get {
return _allowClose;
}
set {
_allowClose = value;
}
}
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowConnect),
]
public virtual bool AllowConnect {
get {
return _allowConnect;
}
set {
_allowConnect = value;
}
}
///
/// If false, then LayoutEditorPart is the only visible EditorPart. Custom EditorParts
/// may choose to be visible as well.
///
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowEdit),
]
public virtual bool AllowEdit {
get {
return _allowEdit;
}
set {
_allowEdit = value;
}
}
///
///
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowHide),
]
public virtual bool AllowHide {
get {
return _allowHide;
}
set {
_allowHide = value;
}
}
///
/// Whether the user is allowed to minimize the web part
///
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowMinimize),
]
public virtual bool AllowMinimize {
get {
return _allowMinimize;
}
set {
_allowMinimize = value;
}
}
///
/// Whether the user is allowed move the web part around the page
///
[
DefaultValue(true),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AllowZoneChange),
]
public virtual bool AllowZoneChange {
get {
return _allowZoneChange;
}
set {
_allowZoneChange = value;
}
}
[
DefaultValue(""),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_AuthorizationFilter),
]
public virtual string AuthorizationFilter {
get {
return (_authorizationFilter != null) ? _authorizationFilter : String.Empty;
}
set {
_authorizationFilter = value;
}
}
[
DefaultValue(""),
Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
UrlProperty(),
WebCategory("WebPartAppearance"),
Personalizable(PersonalizationScope.Shared),
WebSysDescription(SR.WebPart_CatalogIconImageUrl),
]
public virtual string CatalogIconImageUrl {
get {
return (_catalogIconImageUrl != null) ? _catalogIconImageUrl : String.Empty;
}
set {
if (CrossSiteScriptingValidation.IsDangerousUrl(value)) {
throw new ArgumentException(SR.GetString(SR.WebPart_BadUrl, value), "value");
}
_catalogIconImageUrl = value;
}
}
///
/// Overriden to mark as personalizable
///
// PERF: Use a field instead of calling base.ChromeState, since the base implementation uses
// viewstate.
[
Personalizable
]
public override PartChromeState ChromeState {
get {
return _chromeState;
}
set {
if ((value < PartChromeState.Normal) || (value > PartChromeState.Minimized)) {
throw new ArgumentOutOfRangeException("value");
}
_chromeState = value;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable
]
public override PartChromeType ChromeType {
get {
return base.ChromeType;
}
set {
base.ChromeType = value;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public string ConnectErrorMessage {
get {
return (_connectErrorMessage != null) ? _connectErrorMessage : String.Empty;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable(PersonalizationScope.Shared),
]
public override string Description {
get {
return base.Description;
}
set {
base.Description = value;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable
]
public override ContentDirection Direction {
get {
return base.Direction;
}
set {
base.Direction = value;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public string DisplayTitle {
get {
if (_webPartManager != null) {
return _webPartManager.GetDisplayTitle(this);
}
else {
// Needed for a WebPart in a DeclarativeCatalogPart, or any case where WebPartManager
// has not been set.
string displayTitle = Title;
if (String.IsNullOrEmpty(displayTitle)) {
displayTitle = SR.GetString(SR.Part_Untitled);
}
return displayTitle;
}
}
}
[
DefaultValue(WebPartExportMode.None),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_ExportMode),
]
public virtual WebPartExportMode ExportMode {
get {
return _exportMode;
}
set {
if (ControlState >= ControlState.Loaded &&
(WebPartManager == null ||
(WebPartManager.Personalization.Scope == PersonalizationScope.User && IsShared))) {
throw new InvalidOperationException(SR.GetString(SR.WebPart_CantSetExportMode));
}
if (value < WebPartExportMode.None || value > WebPartExportMode.NonSensitiveData) {
throw new ArgumentOutOfRangeException("value");
}
_exportMode = value;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool HasUserData {
get {
return _hasUserData;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool HasSharedData {
get {
return _hasSharedData;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable
]
public override Unit Height {
get {
return base.Height;
}
set {
base.Height = value;
}
}
///
/// The type of help UI used to display the help topic
///
[
DefaultValue(WebPartHelpMode.Navigate),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_HelpMode),
]
public virtual WebPartHelpMode HelpMode {
get {
return _helpMode;
}
set {
if ((value < WebPartHelpMode.Modal) || (value > WebPartHelpMode.Navigate)) {
throw new ArgumentOutOfRangeException("value");
}
_helpMode = value;
}
}
///
/// The URL of the web part's associated help topic
///
[
DefaultValue(""),
Editor("System.Web.UI.Design.UrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
UrlProperty(),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_HelpUrl),
]
public virtual string HelpUrl {
get {
return (_helpUrl != null) ? _helpUrl : String.Empty;
}
set {
if (CrossSiteScriptingValidation.IsDangerousUrl(value)) {
throw new ArgumentException(SR.GetString(SR.WebPart_BadUrl, value), "value");
}
_helpUrl = value;
}
}
///
/// Whether the web part is to be visually displayed or not.
/// A web part with Hidden set to true still participates in various
/// page lifecycle phases such as PreRender.
///
[
DefaultValue(false),
Personalizable,
Themeable(false),
WebCategory("WebPartAppearance"),
WebSysDescription(SR.WebPart_Hidden),
]
public virtual bool Hidden {
get {
return _hidden;
}
set {
_hidden = value;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool IsClosed {
get {
return _isClosed;
}
}
///
/// An "orphaned" part has no Zone, but has not been moved to the page catalog yet.
///
internal bool IsOrphaned {
get {
return (Zone == null && !IsClosed);
}
}
[
Localizable(true),
WebCategory("WebPartAppearance"),
WebSysDefaultValue(SR.WebPart_DefaultImportErrorMessage),
Personalizable(PersonalizationScope.Shared),
WebSysDescription(SR.WebPart_ImportErrorMessage),
]
public virtual string ImportErrorMessage {
get {
return (_importErrorMessage != null) ?
_importErrorMessage : SR.GetString(SR.WebPart_DefaultImportErrorMessage);
}
set {
_importErrorMessage = value;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool IsShared {
get {
return _isShared;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool IsStandalone {
get {
return _isStandalone;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public bool IsStatic {
get {
return _isStatic;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
Localizable(true),
]
public virtual string Subtitle {
get {
return String.Empty;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable,
]
public override string Title {
get {
return base.Title;
}
set {
base.Title = value;
}
}
// ID rendered on the title bar of the WebPart, so a mouse listener can be attached
// for drag and drop.
internal string TitleBarID {
get {
return titleBarIDPrefix + ID;
}
}
[
DefaultValue(""),
Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
UrlProperty(),
WebCategory("WebPartAppearance"),
Personalizable(PersonalizationScope.Shared),
WebSysDescription(SR.WebPart_TitleIconImageUrl),
]
public virtual string TitleIconImageUrl {
get {
return (_titleIconImageUrl != null) ? _titleIconImageUrl : String.Empty;
}
set {
if (CrossSiteScriptingValidation.IsDangerousUrl(value)) {
throw new ArgumentException(SR.GetString(SR.WebPart_BadUrl, value), "value");
}
_titleIconImageUrl = value;
}
}
[
DefaultValue(""),
Editor("System.Web.UI.Design.UrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
UrlProperty(),
Personalizable(PersonalizationScope.Shared),
Themeable(false),
WebCategory("WebPartBehavior"),
WebSysDescription(SR.WebPart_TitleUrl),
]
public virtual string TitleUrl {
get {
return (_titleUrl != null) ? _titleUrl : String.Empty;
}
set {
if (CrossSiteScriptingValidation.IsDangerousUrl(value)) {
throw new ArgumentException(SR.GetString(SR.WebPart_BadUrl, value), "value");
}
_titleUrl = value;
}
}
internal Dictionary TrackerCounter {
get {
if (_trackerCounter == null) {
_trackerCounter = new Dictionary();
}
return _trackerCounter;
}
}
///
/// Overriden by subclasses to add Verbs for this WebPart.
///
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public virtual WebPartVerbCollection Verbs {
get {
return WebPartVerbCollection.Empty;
}
}
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public virtual object WebBrowsableObject {
get {
return this;
}
}
protected WebPartManager WebPartManager {
get {
return _webPartManager;
}
}
// ID rendered on the table containing the whole web part. We shouldn't render ClientID
// on the table, since it will be rendered by the WebPart on the container for the part
// contents. We shouldn't render ID either, since it may be the same as another control
// on the page, and it should be different than ID since it is being rendered by the Zone,
// not the WebPart.
internal string WholePartID {
get {
return WholePartIDPrefix + ID;
}
}
///
/// Overriden to mark as personalizable
///
[
Personalizable
]
public override Unit Width {
get {
return base.Width;
}
set {
base.Width = value;
}
}
///
/// The WebPartZone that this WebPart is currently rendered within.
/// If the WebPart is closed, returns the WebPartZone that the WebPart
/// was last rendered within.
///
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public WebPartZoneBase Zone {
get {
if (_zone == null) {
string zoneID = ZoneID;
if (!String.IsNullOrEmpty(zoneID) && WebPartManager != null) {
WebPartZoneCollection zones = WebPartManager.Zones;
if (zones != null) {
_zone = zones[zoneID];
}
}
}
return _zone;
}
}
///
/// The ID of the web part zone that this web part logically belongs to
///
internal string ZoneID {
get {
return _zoneID;
}
set {
if (ZoneID != value) {
_zoneID = value;
// Invalidate cache
_zone = null;
}
}
}
///
/// The index of this web part within the web part zone it logically belongs to.
/// An index of -1 means the part is not currently in a zone.
///
[
Browsable(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int ZoneIndex {
get {
return _zoneIndex;
}
}
public virtual EditorPartCollection CreateEditorParts() {
return EditorPartCollection.Empty;
}
protected internal virtual void OnClosing(EventArgs e) {
}
protected internal virtual void OnConnectModeChanged(EventArgs e) {
}
protected internal virtual void OnDeleting(EventArgs e) {
}
protected internal virtual void OnEditModeChanged(EventArgs e) {
}
internal override void PreRenderRecursiveInternal() {
if (IsStandalone) {
if (Hidden) {
throw new InvalidOperationException(SR.GetString(SR.WebPart_NotStandalone, "Hidden", ID));
}
}
else {
if (!Visible) {
throw new InvalidOperationException(SR.GetString(SR.WebPart_OnlyStandalone, "Visible", ID));
}
}
base.PreRenderRecursiveInternal();
}
internal void SetConnectErrorMessage(string connectErrorMessage) {
// Only set the error message if it has not been set already. The first error message
// set should be displayed.
if (String.IsNullOrEmpty(_connectErrorMessage)) {
_connectErrorMessage = connectErrorMessage;
}
}
internal void SetHasUserData(bool hasUserData) {
_hasUserData = hasUserData;
}
internal void SetHasSharedData(bool hasSharedData) {
_hasSharedData = hasSharedData;
}
internal void SetIsClosed(bool isClosed) {
_isClosed = isClosed;
}
internal void SetIsShared(bool isShared) {
_isShared = isShared;
}
internal void SetIsStandalone(bool isStandalone) {
_isStandalone = isStandalone;
}
internal void SetIsStatic(bool isStatic) {
_isStatic = isStatic;
}
protected void SetPersonalizationDirty() {
if (WebPartManager == null) {
throw new InvalidOperationException(SR.GetString(SR.WebPartManagerRequired));
}
WebPartManager.Personalization.SetDirty(this);
}
///
/// This method allows a non-WebPart control to mark its personalization as dirty.
///
public static void SetPersonalizationDirty(Control control) {
if (control == null) {
throw new ArgumentNullException("control");
}
if (control.Page == null) {
throw new ArgumentException(SR.GetString(SR.PropertyCannotBeNull, "Page"), "control");
}
WebPartManager wpm = WebPartManager.GetCurrentWebPartManager(control.Page);
if (wpm == null) {
throw new InvalidOperationException(SR.GetString(SR.WebPartManagerRequired));
}
WebPart webPart = wpm.GetGenericWebPart(control);
if (webPart == null) {
throw new ArgumentException(SR.GetString(SR.WebPart_NonWebPart), "control");
}
webPart.SetPersonalizationDirty();
}
internal void SetWebPartManager(WebPartManager webPartManager) {
_webPartManager = webPartManager;
}
///
/// The index of this web part within the web part zone it logically belongs to.
///
internal void SetZoneIndex(int zoneIndex) {
if (zoneIndex < 0) {
throw new ArgumentOutOfRangeException("zoneIndex");
}
_zoneIndex = zoneIndex;
}
// If this is a GenericWebPart, returns the ChildControl. Else, just returns a pointer to itself.
// Used when you need the Control to pass to methods on ConnectionPoint.
internal Control ToControl() {
GenericWebPart genericWebPart = this as GenericWebPart;
if (genericWebPart != null) {
Control control = genericWebPart.ChildControl;
if (control != null) {
return control;
} else {
throw new InvalidOperationException(SR.GetString(SR.GenericWebPart_ChildControlIsNull));
}
}
else {
return this;
}
}
protected override void TrackViewState() {
if (WebPartManager != null) {
WebPartManager.Personalization.ApplyPersonalizationState(this);
}
base.TrackViewState();
}
///
/// We need this to return nonzero for any two distinct WebParts on the page,
/// since we use SortedList in WebPartManager, and SortedList cannot contain
/// two keys where the IComparer returns zero. Two WebParts can have the same
/// ZoneIndex when we merge the Shared and User parts. We use the ID
/// to order the parts if ZoneIndex is the same.
///
internal sealed class ZoneIndexComparer : IComparer {
public int Compare(object x, object y) {
WebPart p1 = (WebPart)x;
WebPart p2 = (WebPart)y;
int c = p1.ZoneIndex - p2.ZoneIndex;
if (c == 0) {
c = p1.ID.CompareTo(p2.ID);
}
return c;
}
}
}
}
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