1 // 2 // System.Web.UI.HtmlControls.HtmlContainerControl.cs 3 // 4 // Authors: 5 // Bob Smith <bob@thestuff.net> 6 // Gonzalo Paniagua Javier (gonzalo@ximian.com) 7 // 8 // (C) Bob Smith 9 // (c) 2002 Ximian, Inc. (http://www.ximian.com) 10 // Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com) 11 // 12 // Permission is hereby granted, free of charge, to any person obtaining 13 // a copy of this software and associated documentation files (the 14 // "Software"), to deal in the Software without restriction, including 15 // without limitation the rights to use, copy, modify, merge, publish, 16 // distribute, sublicense, and/or sell copies of the Software, and to 17 // permit persons to whom the Software is furnished to do so, subject to 18 // the following conditions: 19 // 20 // The above copyright notice and this permission notice shall be 21 // included in all copies or substantial portions of the Software. 22 // 23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 30 // 31 32 using System.ComponentModel; 33 using System.Security.Permissions; 34 using System.Text; 35 36 //LAMESPEC: The dox talk about HttpException but are very ambigious. 37 //TODO: Check to see if Render really is overridden instead of a LiteralControl being added. It apears that this is the 38 //case due to testing. Anything inside the block is overwritten by the content of this control, so it doesnt apear 39 //to do anything with children. 40 41 //TODO: If Test.InnerText = Test.InnerHtml without ever assigning anything into InnerHtml, you get this: 42 // Exception Details: System.Web.HttpException: Cannot get inner content of Message because the contents are not literal. 43 //[HttpException (0x80004005): Cannot get inner content of Message because the contents are not literal.] 44 // System.Web.UI.HtmlControls.HtmlContainerControl.get_InnerHtml() +278 45 // ASP.test3_aspx.AnchorBtn_Click(Object Source, EventArgs E) in \\genfs2\www24\bobsmith11\test3.aspx:6 46 // System.Web.UI.HtmlControls.HtmlAnchor.OnServerClick(EventArgs e) +108 47 // System.Web.UI.HtmlControls.HtmlAnchor.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +26 48 // System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18 49 // System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +149 50 // System.Web.UI.Page.ProcessRequestMain() +660 51 52 53 namespace System.Web.UI.HtmlControls 54 { 55 // CAS 56 [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)] 57 [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)] 58 public abstract class HtmlContainerControl : HtmlControl 59 { HtmlContainerControl()60 protected HtmlContainerControl () : this ("span") 61 {} 62 HtmlContainerControl(string tag)63 public HtmlContainerControl (string tag) : base(tag) 64 {} 65 66 [HtmlControlPersistable (false)] 67 [BrowsableAttribute(false)] 68 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)] 69 public virtual string InnerHtml 70 { 71 get { 72 if (Controls.Count == 0) 73 return String.Empty; 74 75 if (Controls.Count == 1) { 76 Control ctrl = Controls [0]; 77 LiteralControl lc = ctrl as LiteralControl; 78 if (lc != null) 79 return lc.Text; 80 81 DataBoundLiteralControl dblc = ctrl as DataBoundLiteralControl; 82 if (dblc != null) 83 return dblc.Text; 84 } 85 86 throw new HttpException ("There is no literal content!"); 87 } 88 89 set { 90 Controls.Clear (); 91 Controls.Add (new LiteralControl (value)); 92 if (value == null) 93 ViewState.Remove ("innerhtml"); 94 else 95 ViewState ["innerhtml"] = value; 96 } 97 } 98 99 [HtmlControlPersistable (false)] 100 [BrowsableAttribute(false)] 101 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)] 102 public virtual string InnerText 103 { 104 get { 105 return HttpUtility.HtmlDecode (InnerHtml); 106 } 107 108 set { 109 InnerHtml = HttpUtility.HtmlEncode (value); 110 } 111 } 112 Render(HtmlTextWriter writer)113 protected internal override void Render (HtmlTextWriter writer) 114 { 115 RenderBeginTag (writer); 116 RenderChildren (writer); 117 RenderEndTag (writer); 118 } 119 RenderEndTag(HtmlTextWriter writer)120 protected virtual void RenderEndTag (HtmlTextWriter writer) 121 { 122 writer.WriteEndTag (TagName); 123 } 124 RenderAttributes(HtmlTextWriter writer)125 protected override void RenderAttributes (HtmlTextWriter writer) 126 { 127 ViewState.Remove ("innerhtml"); 128 base.RenderAttributes (writer); 129 } 130 131 /* we need to override this because our base class 132 * (HtmlControl) returns an instance of 133 * EmptyControlCollection. */ CreateControlCollection()134 protected override ControlCollection CreateControlCollection () 135 { 136 return new ControlCollection (this); 137 } 138 LoadViewState(object savedState)139 protected override void LoadViewState (object savedState) 140 { 141 if (savedState != null) { 142 base.LoadViewState (savedState); 143 string inner = ViewState ["innerhtml"] as string; 144 if (inner != null) 145 InnerHtml = inner; 146 } 147 } 148 } 149 } 150