Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / HyperLink.cs / 2 / HyperLink.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.ComponentModel; using System.Web; using System.Web.UI; using System.Web.Util; using System.Drawing.Design; using System.Text; using System.Security.Permissions; ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class HyperLinkControlBuilder : ControlBuilder { ///Interacts with the parser to build a ///. /// public override bool AllowWhitespaceLiterals() { return false; } } ///Gets a value to indicate whether or not white spaces are allowed in literals for this control. This /// property is read-only. ////// [ ControlBuilderAttribute(typeof(HyperLinkControlBuilder)), DataBindingHandler("System.Web.UI.Design.HyperLinkDataBindingHandler, " + AssemblyRef.SystemDesign), DefaultProperty("Text"), Designer("System.Web.UI.Design.WebControls.HyperLinkDesigner, " + AssemblyRef.SystemDesign), ToolboxData("<{0}:HyperLink runat=\"server\">HyperLink{0}:HyperLink>"), ParseChildren(false) ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class HyperLink : WebControl { #if SHIPPINGADAPTERS private string _renderHref = null; private bool _urlResolved = false; #endif ///Creates a link for the browser to navigate to another page. ////// public HyperLink() : base(HtmlTextWriterTag.A) { } #if SITECOUNTERS [ WebCategory("SiteCounters"), DefaultValue("HyperLink"), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_CounterGroup), ] public virtual String CounterGroup { get { String s = (String)ViewState["CounterGroup"]; return((s == null) ? "HyperLink" : s); } set { ViewState["CounterGroup"] = value; } } ///Initializes a new instance of the ///class. /// [ WebCategory("SiteCounters"), DefaultValue(""), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_CounterName), ] public String CounterName { get { String s = (String)ViewState["CounterName"]; return((s == null) ? String.Empty : s); } set { ViewState["CounterName"] = value; } } [ WebCategory("SiteCounters"), DefaultValue(false), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_CountClicks), ] public bool CountClicks { get { object b = ViewState["CountClicks"]; return((b == null) ? false : (bool)b); } set { ViewState["CountClicks"] = value; } } #endif ///Gets or sets the target name for qualifying click-through counters. ////// [ Bindable(true), WebCategory("Appearance"), DefaultValue(""), Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebSysDescription(SR.HyperLink_ImageUrl) ] public virtual string ImageUrl { get { string s = (string)ViewState["ImageUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["ImageUrl"] = value; } } ///Gets or sets the URL reference to an image to display as an alternative to plain text for the /// hyperlink. ////// [ Bindable(true), WebCategory("Navigation"), DefaultValue(""), Editor("System.Web.UI.Design.UrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebSysDescription(SR.HyperLink_NavigateUrl) ] public string NavigateUrl { get { string s = (string)ViewState["NavigateUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["NavigateUrl"] = value; } } internal override bool RequiresLegacyRendering { get { return true; } } #if SITECOUNTERS [ WebCategory("SiteCounters"), DefaultValue(-1), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_RowsPerDay), ] public int RowsPerDay { get { Object o = ViewState["RowsPerDay"]; return((o == null) ? -1 : (int) o); } set { if (value == 0) { throw new ArgumentOutOfRangeException("value"); } ViewState["RowsPerDay"] = value; } } [ WebCategory("SiteCounters"), DefaultValue(""), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_SiteCountersProvider) ] public String SiteCountersProvider { get { String s = (String) ViewState["SiteCountersProvider"]; return((s != null) ? s : String.Empty); } set { ViewState["SiteCountersProvider"] = value; } } #endif ///Gets or sets the URL reference to navigate to when the hyperlink is clicked. ////// [ WebCategory("Navigation"), DefaultValue(""), WebSysDescription(SR.HyperLink_Target), TypeConverter(typeof(TargetConverter)) ] public string Target { get { string s = (string)ViewState["Target"]; return((s == null) ? String.Empty : s); } set { ViewState["Target"] = value; } } ///Gets or sets the target window or frame the contents of /// the ///will be displayed into when clicked. /// [ Localizable(true), Bindable(true), WebCategory("Appearance"), DefaultValue(""), WebSysDescription(SR.HyperLink_Text), PersistenceMode(PersistenceMode.InnerDefaultProperty) ] public virtual string Text { get { object o = ViewState["Text"]; return((o == null) ? String.Empty : (string)o); } set { if (HasControls()) { Controls.Clear(); } ViewState["Text"] = value; } } #if SITECOUNTERS [ WebCategory("SiteCounters"), DefaultValue(true), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_TrackApplicationName), ] public bool TrackApplicationName { get { object b = ViewState["TrackApplicationName"]; return((b == null) ? true : (bool)b); } set { ViewState["TrackApplicationName"] = value; } } [ WebCategory("SiteCounters"), DefaultValue(true), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_TrackNavigateUrl), ] public bool TrackNavigateUrl { get { object b = ViewState["TrackNavigateUrl"]; return((b == null) ? true : (bool)b); } set { ViewState["TrackNavigateUrl"] = value; } } [ WebCategory("SiteCounters"), DefaultValue(true), Themeable(false), WebSysDescription(SR.Control_For_SiteCounters_TrackPageUrl), ] public bool TrackPageUrl { get { object b = ViewState["TrackPageUrl"]; return((b == null) ? true : (bool)b); } set { ViewState["TrackPageUrl"] = value; } } #endif #if SHIPPINGADAPTERS // Perf work: Specially for AdRotator which uses the control while it // resolves the url on its own. internal bool UrlResolved { get { return _urlResolved; } set { _urlResolved = value; } } #endif ////// Gets or sets the text displayed for the ///. /// /// protected override void AddAttributesToRender(HtmlTextWriter writer) { if (Enabled && !IsEnabled) { // We need to do the cascade effect on the server, because the browser // only renders as disabled, but doesn't disable the functionality. writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled"); } base.AddAttributesToRender(writer); #if SHIPPINGADAPTERS string s = (!String.IsNullOrEmpty(_renderHref)) ? _renderHref : NavigateUrl; #else string s = NavigateUrl; #endif if ((s.Length > 0) && IsEnabled) { #if SHIPPINGADAPTERS string resolvedUrl = (UrlResolved) ? s : ResolveClientUrl(s); #else string resolvedUrl = ResolveClientUrl(s); #endif #if SITECOUNTERS resolvedUrl = GetCountClickUrl(resolvedUrl); #endif writer.AddAttribute(HtmlTextWriterAttribute.Href, resolvedUrl); } s = Target; if (s.Length > 0) { writer.AddAttribute(HtmlTextWriterAttribute.Target, s); } } protected override void AddParsedSubObject(object obj) { if (HasControls()) { base.AddParsedSubObject(obj); } else { if (obj is LiteralControl) { Text = ((LiteralControl)obj).Text; } else { string currentText = Text; if (currentText.Length != 0) { Text = String.Empty; base.AddParsedSubObject(new LiteralControl(currentText)); } base.AddParsedSubObject(obj); } } } #if SITECOUNTERS internal string GetCountClickUrl(string url) { if (CountClicks && url != null && url.Length > 0) { HttpContext context = Context; SiteCounters siteCounters = (context == null) ? null : context.SiteCounters; if (siteCounters != null && siteCounters.Enabled) { String counterName = CounterName; if (counterName != null && counterName.Length == 0) { if (UrlPath.IsRelativeUrl(url)) { // Make the path absolute for data reporting counterName = UrlPath.Combine(context.Request.FilePathObject, url); } else { counterName = url; } } url = siteCounters.GetRedirectUrl( CounterGroup, counterName, SiteCounters.ClickEventText, url, TrackApplicationName, TrackPageUrl, TrackNavigateUrl, SiteCountersProvider, RowsPerDay); } } return url; } #endif ///Adds the attribututes of the a ///to the output /// stream for rendering. /// /// Load previously saved state. /// Overridden to synchronize Text property with LiteralContent. /// protected override void LoadViewState(object savedState) { if (savedState != null) { base.LoadViewState(savedState); string s = (string)ViewState["Text"]; if (s != null) Text = s; } } #if SITECOUNTERS protected internal override void OnPreRender(EventArgs e) { base.OnPreRender(e); // VSWhidbey 83401: Check if the url is supported for redirect when // CountClicks is true. if (CountClicks && !UrlPath.IsPathRedirectSupported(NavigateUrl)) { throw new HttpException( SR.GetString( SR.SiteCounters_url_not_supported_for_redirect, NavigateUrl)); } } #endif ////// /// protected internal override void RenderContents(HtmlTextWriter writer) { string s = ImageUrl; if (s.Length > 0) { Image img = new Image(); // NOTE: The Url resolution happens right here, because the image is not parented // and will not be able to resolve when it tries to do so. img.ImageUrl = ResolveClientUrl(s); s = ToolTip; if (s.Length != 0) { img.ToolTip = s; } s = Text; if (s.Length != 0) { img.AlternateText = s; } img.RenderControl(writer); } else { if (HasRenderingData()) { base.RenderContents(writer); } else { writer.Write(Text); } } } #if SHIPPINGADAPTERS internal void SetRenderHref(string s) { _renderHref = s; } #endif } }Displays the ///on a page.
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