Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / ZoneLinkButton.cs / 1 / ZoneLinkButton.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls.WebParts { using System; using System.ComponentModel; using System.Web.UI.WebControls; ////// [SupportsEventValidation] internal sealed class ZoneLinkButton : LinkButton { private WebZone _owner; private string _eventArgument; private string _imageUrl; public ZoneLinkButton(WebZone owner, string eventArgument) { if (owner == null) { throw new ArgumentNullException("owner"); } _owner = owner; _eventArgument = eventArgument; } public string ImageUrl { get { return (_imageUrl != null) ? _imageUrl : String.Empty; } set { _imageUrl = value; } } protected override PostBackOptions GetPostBackOptions() { // _owner.Page may be null in the designer if (!String.IsNullOrEmpty(_eventArgument) && _owner.Page != null) { PostBackOptions options = new PostBackOptions(_owner, _eventArgument); options.RequiresJavaScriptProtocol = true; return options; } return base.GetPostBackOptions(); } protected internal override void RenderContents(HtmlTextWriter writer) { // Copied from HyperLink.RenderContents() and modified slightly string imageUrl = ImageUrl; if (!String.IsNullOrEmpty(imageUrl)) { Image image = 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. image.ImageUrl = ResolveClientUrl(imageUrl); string toolTip = ToolTip; if (!String.IsNullOrEmpty(toolTip)) { image.ToolTip = toolTip; } string text = Text; if (!String.IsNullOrEmpty(text)) { image.AlternateText = text; } image.Page = Page; image.RenderControl(writer); } else { base.RenderContents(writer); } } } }
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