81 lines
2.6 KiB
C#
81 lines
2.6 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="ZoneLinkButton.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.WebControls.WebParts {
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using System;
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using System.ComponentModel;
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using System.Web.UI.WebControls;
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/// <devdoc>
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/// </devdoc>
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[SupportsEventValidation]
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internal sealed class ZoneLinkButton : LinkButton {
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private WebZone _owner;
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private string _eventArgument;
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private string _imageUrl;
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public ZoneLinkButton(WebZone owner, string eventArgument) {
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if (owner == null) {
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throw new ArgumentNullException("owner");
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}
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_owner = owner;
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_eventArgument = eventArgument;
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}
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public string ImageUrl {
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get {
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return (_imageUrl != null) ? _imageUrl : String.Empty;
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}
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set {
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_imageUrl = value;
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}
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}
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protected override PostBackOptions GetPostBackOptions() {
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// _owner.Page may be null in the designer
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if (!String.IsNullOrEmpty(_eventArgument) && _owner.Page != null) {
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PostBackOptions options = new PostBackOptions(_owner, _eventArgument);
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options.RequiresJavaScriptProtocol = true;
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return options;
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}
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return base.GetPostBackOptions();
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}
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protected internal override void RenderContents(HtmlTextWriter writer) {
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// Copied from HyperLink.RenderContents() and modified slightly
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string imageUrl = ImageUrl;
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if (!String.IsNullOrEmpty(imageUrl)) {
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Image image = new Image();
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// NOTE: The Url resolution happens right here, because the image is not parented
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// and will not be able to resolve when it tries to do so.
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image.ImageUrl = ResolveClientUrl(imageUrl);
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string toolTip = ToolTip;
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if (!String.IsNullOrEmpty(toolTip)) {
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image.ToolTip = toolTip;
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}
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string text = Text;
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if (!String.IsNullOrEmpty(text)) {
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image.AlternateText = text;
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}
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image.Page = Page;
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image.RenderControl(writer);
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}
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else {
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base.RenderContents(writer);
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}
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}
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}
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}
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