Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / DEVDIV / depot / DevDiv / releases / whidbey / QFE / ndp / fx / src / xsp / System / Web / UI / WebControls / Image.cs / 1 / Image.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Globalization; using System.Text; using System.Web; using System.Web.UI; using System.Drawing.Design; using System.Security.Permissions; ////// [ DefaultProperty("ImageUrl"), Designer("System.Web.UI.Design.WebControls.PreviewControlDesigner, " + AssemblyRef.SystemDesign), ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class Image : WebControl { private bool _urlResolved; ///Displays an image on a page. ////// public Image() : base(HtmlTextWriterTag.Img) { } ///Initializes a new instance of the ///class. /// [ #if ORCAS // Verification(guideline, checkpoint, VerificationReportLevel.Error, priority, message); Verification("WCAG", "1.1", VerificationReportLevel.Error, 1, SR.Accessibility_ImageAlternateTextMissing), Verification("ADA", "1194.22(a)", VerificationReportLevel.Error, 1, SR.Accessibility_ImageAlternateTextMissing), #endif Localizable(true), Bindable(true), WebCategory("Appearance"), DefaultValue(""), WebSysDescription(SR.Image_AlternateText) ] public virtual string AlternateText { get { string s = (string)ViewState["AlternateText"]; return((s == null) ? String.Empty : s); } set { ViewState["AlternateText"] = value; } } ///Specifies alternate text displayed when the image fails to load. ////// [ DefaultValue(""), Editor("System.Web.UI.Design.UrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebCategory("Accessibility"), WebSysDescription(SR.Image_DescriptionUrl) ] public virtual string DescriptionUrl { get { string s = (string)ViewState["DescriptionUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["DescriptionUrl"] = value; } } ////// [ Browsable(false), EditorBrowsableAttribute(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override FontInfo Font { // Font is meaningless for image, so hide it from the developer by // making it non-browsable. get { return base.Font; } } [ Browsable(false), EditorBrowsableAttribute(EditorBrowsableState.Never) ] public override bool Enabled { get { return base.Enabled; } set { base.Enabled = value; } } [ DefaultValue(false), WebCategory("Accessibility"), WebSysDescription(SR.Image_GenerateEmptyAlternateText) ] public virtual bool GenerateEmptyAlternateText { get { object o = ViewState["GenerateEmptyAlternateText"]; return((o == null) ? false : (bool)o); } set { ViewState["GenerateEmptyAlternateText"] = value; } } ///Gets the font properties for the alternate text. This property is read-only. ////// [ WebCategory("Layout"), DefaultValue(ImageAlign.NotSet), WebSysDescription(SR.Image_ImageAlign) ] public virtual ImageAlign ImageAlign { get { object o = ViewState["ImageAlign"]; return((o == null) ? ImageAlign.NotSet : (ImageAlign)o); } set { if (value < ImageAlign.NotSet || value > ImageAlign.TextTop) { throw new ArgumentOutOfRangeException("value"); } ViewState["ImageAlign"] = value; } } ///Gets or /// sets the alignment of the image within the text flow. ////// [ Bindable(true), WebCategory("Appearance"), DefaultValue(""), Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebSysDescription(SR.Image_ImageUrl) ] public virtual string ImageUrl { get { string s = (string)ViewState["ImageUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["ImageUrl"] = value; } } // 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; } } ///Gets or sets /// the URL reference to the image to display. ////// /// protected override void AddAttributesToRender(HtmlTextWriter writer) { base.AddAttributesToRender(writer); string s = ImageUrl; if (!UrlResolved) { s = ResolveClientUrl(s); } if (s.Length > 0 || !EnableLegacyRendering) { writer.AddAttribute(HtmlTextWriterAttribute.Src, s); } s = DescriptionUrl; if (s.Length != 0) { writer.AddAttribute(HtmlTextWriterAttribute.Longdesc, ResolveClientUrl(s)); } // always write out alt for accessibility purposes s = AlternateText; if (s.Length > 0 || GenerateEmptyAlternateText) { writer.AddAttribute(HtmlTextWriterAttribute.Alt,s); } ImageAlign align = ImageAlign; if (align != ImageAlign.NotSet) { string imageAlignValue; switch (align) { case ImageAlign.Left: imageAlignValue = "left"; break; case ImageAlign.Right: imageAlignValue = "right"; break; case ImageAlign.Baseline: imageAlignValue = "baseline"; break; case ImageAlign.Top: imageAlignValue = "top"; break; case ImageAlign.Middle: imageAlignValue = "middle"; break; case ImageAlign.Bottom: imageAlignValue = "bottom"; break; case ImageAlign.AbsBottom: imageAlignValue = "absbottom"; break; case ImageAlign.AbsMiddle: imageAlignValue = "absmiddle"; break; default: imageAlignValue = "texttop"; break; } writer.AddAttribute(HtmlTextWriterAttribute.Align, imageAlignValue); } if (BorderWidth.IsEmpty) { if (EnableLegacyRendering) { writer.AddAttribute(HtmlTextWriterAttribute.Border, "0", false); } else { writer.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth, "0px"); } } } ///Adds the attributes of an ///to the output stream for rendering on /// the client. /// /// protected internal override void RenderContents(HtmlTextWriter writer) { // Do not render the children of a button since it does not // make sense to have children of an tag. } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Globalization; using System.Text; using System.Web; using System.Web.UI; using System.Drawing.Design; using System.Security.Permissions; ////// [ DefaultProperty("ImageUrl"), Designer("System.Web.UI.Design.WebControls.PreviewControlDesigner, " + AssemblyRef.SystemDesign), ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class Image : WebControl { private bool _urlResolved; ///Displays an image on a page. ////// public Image() : base(HtmlTextWriterTag.Img) { } ///Initializes a new instance of the ///class. /// [ #if ORCAS // Verification(guideline, checkpoint, VerificationReportLevel.Error, priority, message); Verification("WCAG", "1.1", VerificationReportLevel.Error, 1, SR.Accessibility_ImageAlternateTextMissing), Verification("ADA", "1194.22(a)", VerificationReportLevel.Error, 1, SR.Accessibility_ImageAlternateTextMissing), #endif Localizable(true), Bindable(true), WebCategory("Appearance"), DefaultValue(""), WebSysDescription(SR.Image_AlternateText) ] public virtual string AlternateText { get { string s = (string)ViewState["AlternateText"]; return((s == null) ? String.Empty : s); } set { ViewState["AlternateText"] = value; } } ///Specifies alternate text displayed when the image fails to load. ////// [ DefaultValue(""), Editor("System.Web.UI.Design.UrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebCategory("Accessibility"), WebSysDescription(SR.Image_DescriptionUrl) ] public virtual string DescriptionUrl { get { string s = (string)ViewState["DescriptionUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["DescriptionUrl"] = value; } } ////// [ Browsable(false), EditorBrowsableAttribute(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), ] public override FontInfo Font { // Font is meaningless for image, so hide it from the developer by // making it non-browsable. get { return base.Font; } } [ Browsable(false), EditorBrowsableAttribute(EditorBrowsableState.Never) ] public override bool Enabled { get { return base.Enabled; } set { base.Enabled = value; } } [ DefaultValue(false), WebCategory("Accessibility"), WebSysDescription(SR.Image_GenerateEmptyAlternateText) ] public virtual bool GenerateEmptyAlternateText { get { object o = ViewState["GenerateEmptyAlternateText"]; return((o == null) ? false : (bool)o); } set { ViewState["GenerateEmptyAlternateText"] = value; } } ///Gets the font properties for the alternate text. This property is read-only. ////// [ WebCategory("Layout"), DefaultValue(ImageAlign.NotSet), WebSysDescription(SR.Image_ImageAlign) ] public virtual ImageAlign ImageAlign { get { object o = ViewState["ImageAlign"]; return((o == null) ? ImageAlign.NotSet : (ImageAlign)o); } set { if (value < ImageAlign.NotSet || value > ImageAlign.TextTop) { throw new ArgumentOutOfRangeException("value"); } ViewState["ImageAlign"] = value; } } ///Gets or /// sets the alignment of the image within the text flow. ////// [ Bindable(true), WebCategory("Appearance"), DefaultValue(""), Editor("System.Web.UI.Design.ImageUrlEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), UrlProperty(), WebSysDescription(SR.Image_ImageUrl) ] public virtual string ImageUrl { get { string s = (string)ViewState["ImageUrl"]; return((s == null) ? String.Empty : s); } set { ViewState["ImageUrl"] = value; } } // 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; } } ///Gets or sets /// the URL reference to the image to display. ////// /// protected override void AddAttributesToRender(HtmlTextWriter writer) { base.AddAttributesToRender(writer); string s = ImageUrl; if (!UrlResolved) { s = ResolveClientUrl(s); } if (s.Length > 0 || !EnableLegacyRendering) { writer.AddAttribute(HtmlTextWriterAttribute.Src, s); } s = DescriptionUrl; if (s.Length != 0) { writer.AddAttribute(HtmlTextWriterAttribute.Longdesc, ResolveClientUrl(s)); } // always write out alt for accessibility purposes s = AlternateText; if (s.Length > 0 || GenerateEmptyAlternateText) { writer.AddAttribute(HtmlTextWriterAttribute.Alt,s); } ImageAlign align = ImageAlign; if (align != ImageAlign.NotSet) { string imageAlignValue; switch (align) { case ImageAlign.Left: imageAlignValue = "left"; break; case ImageAlign.Right: imageAlignValue = "right"; break; case ImageAlign.Baseline: imageAlignValue = "baseline"; break; case ImageAlign.Top: imageAlignValue = "top"; break; case ImageAlign.Middle: imageAlignValue = "middle"; break; case ImageAlign.Bottom: imageAlignValue = "bottom"; break; case ImageAlign.AbsBottom: imageAlignValue = "absbottom"; break; case ImageAlign.AbsMiddle: imageAlignValue = "absmiddle"; break; default: imageAlignValue = "texttop"; break; } writer.AddAttribute(HtmlTextWriterAttribute.Align, imageAlignValue); } if (BorderWidth.IsEmpty) { if (EnableLegacyRendering) { writer.AddAttribute(HtmlTextWriterAttribute.Border, "0", false); } else { writer.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth, "0px"); } } } ///Adds the attributes of an ///to the output stream for rendering on /// the client. /// /// protected internal override void RenderContents(HtmlTextWriter writer) { // Do not render the children of a button since it does not // make sense to have children of an tag. } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CategoryGridEntry.cs
- ActivityExecutor.cs
- JsonMessageEncoderFactory.cs
- QueryResponse.cs
- XMLSyntaxException.cs
- PopupControlService.cs
- EventLog.cs
- ObjectListTitleAttribute.cs
- ToolStripContentPanelDesigner.cs
- PenCursorManager.cs
- DiagnosticsConfiguration.cs
- SmiContext.cs
- ResourceProviderFactory.cs
- SendReply.cs
- HttpPostProtocolImporter.cs
- SecurityCriticalDataForSet.cs
- IISMapPath.cs
- ClientSettingsProvider.cs
- ObjectViewQueryResultData.cs
- EncoderNLS.cs
- PageSetupDialog.cs
- XmlSubtreeReader.cs
- SchemaCollectionCompiler.cs
- MLangCodePageEncoding.cs
- MasterPageBuildProvider.cs
- DelegateInArgument.cs
- Encoder.cs
- AnnotationAdorner.cs
- TableColumn.cs
- SmtpCommands.cs
- AttributeData.cs
- xmlglyphRunInfo.cs
- StaticContext.cs
- UnsafePeerToPeerMethods.cs
- DataGridViewRowPrePaintEventArgs.cs
- NameValueFileSectionHandler.cs
- SelectedCellsCollection.cs
- _ListenerRequestStream.cs
- WizardPanel.cs
- Transform3DGroup.cs
- WebHttpBindingElement.cs
- RepeaterItemCollection.cs
- DBConnectionString.cs
- XamlTypeMapper.cs
- OleDbSchemaGuid.cs
- SplitterEvent.cs
- TrackingProfile.cs
- UpdateCompiler.cs
- BoolExpression.cs
- TableLayoutColumnStyleCollection.cs
- StringFreezingAttribute.cs
- ColorPalette.cs
- TablePattern.cs
- PageVisual.cs
- XslVisitor.cs
- SiteMapNodeCollection.cs
- RuleElement.cs
- ISAPIApplicationHost.cs
- XmlDataImplementation.cs
- FunctionQuery.cs
- FormParameter.cs
- Header.cs
- DataGridViewIntLinkedList.cs
- CellParaClient.cs
- UnauthorizedAccessException.cs
- ReadOnlyKeyedCollection.cs
- CallInfo.cs
- ResourceReferenceExpression.cs
- SqlConnectionPoolProviderInfo.cs
- QueryableFilterRepeater.cs
- BreakRecordTable.cs
- OperationGenerator.cs
- XPathNavigator.cs
- WebPartsSection.cs
- WebBaseEventKeyComparer.cs
- XmlWriterSettings.cs
- XmlSignatureProperties.cs
- Console.cs
- ConfigurationSectionCollection.cs
- LoopExpression.cs
- ListBox.cs
- InteropAutomationProvider.cs
- Size.cs
- StickyNoteAnnotations.cs
- Gdiplus.cs
- FormViewInsertedEventArgs.cs
- XamlTreeBuilderBamlRecordWriter.cs
- OdbcEnvironmentHandle.cs
- HideDisabledControlAdapter.cs
- SystemIPGlobalProperties.cs
- WaitForChangedResult.cs
- LogLogRecord.cs
- COSERVERINFO.cs
- OptimizedTemplateContent.cs
- CultureInfo.cs
- StringFunctions.cs
- CodeGenerator.cs
- _IPv4Address.cs
- COM2PictureConverter.cs
- ClassicBorderDecorator.cs