www.pudn.com > Tustena_CRM_OS_3.0.2_Stable.zip > PageUtils.cs

/// TUSTENA PUBLIC LICENSE v1.0 
///  
/// Portions Copyright (c) 2003-2005 Digita S.r.l. All Rights Reserved. 
/// 
/// Tustena CRM is a trademark of: 
/// Digita S.r.l. 
/// Viale Enrico Fermi 14/z 
/// 31011 Asolo (Italy) 
/// Tel. +39-0423-951251 
/// Mail. info@digita.it 
/// 
/// This file contains Original Code and/or Modifications of Original Code 
/// as defined in and that are subject to the Tustena Public Source License 
/// Version 1.0 (the 'License'). You may not use this file except in 
/// compliance with the License. Please obtain a copy of the License at 
/// http://www.tustena.com/TPL/ and read it before using this 
// file. 
/// 
/// The Original Code and all software distributed under the License are 
/// distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
/// EXPRESS OR IMPLIED, AND DIGITA S.R.L. HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
/// INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
/// FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
/// Please see the License for the specific language governing rights and 
/// limitations under the License. 
/// 
/// YOU MAY NOT REMOVE OR ALTER THIS COPYRIGHT NOTICE! 
///  
 
using System; 
using System.IO; 
using System.Text; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.HtmlControls; 
using System.Web.UI.WebControls; 
 
namespace Digita.Tustena.RenderUtils 
{ 
	public class PageUtil 
	{ 
		public static void SetInitialFocus(Control control) 
		{ 
			if (control.Page == null) 
			{ 
				throw new ArgumentException("The Control must be added to a Page before you can set the IntialFocus to it."); 
			} 
			if (control.Page.Request.Browser.JavaScript == true) 
			{ 
				StringBuilder s = new StringBuilder(); 
				s.Append("\n"); 
 
				control.Page.RegisterClientScriptBlock("InitialFocus", s.ToString()); 
			} 
		} 
 
		public bool GetStatusNotModified() 
		{ 
			string sPath = HttpContext.Current.Request.ServerVariables["Path_Translated"]; 
			return GetStatusNotModified(File.GetLastWriteTime(sPath)); 
		} 
 
		public bool GetStatusNotModified(DateTime latest) 
		{ 
			bool notModified = false; 
 
			string etag = HttpContext.Current.Request.Headers["If-None-Match"]; 
			if (etag != null) 
			{ 
				notModified = (etag.Equals(latest.Ticks.ToString())); 
			} 
			else 
			{ 
				string ifModifiedSince = HttpContext.Current.Request.Headers["if-modified-since"]; 
 
				if (ifModifiedSince != null) 
				{ 
					try 
					{ 
						if (ifModifiedSince.IndexOf(";") > -1) 
						{ 
							ifModifiedSince = ifModifiedSince.Split(';').GetValue(0).ToString(); 
						} 
 
						DateTime ifModDate = DateTime.Parse(ifModifiedSince); 
 
						notModified = (latest <= ifModDate); 
					} 
					catch 
					{ 
					} 
				} 
			} 
 
			if (notModified) 
			{ 
				HttpContext.Current.Response.StatusCode = 304; 
				HttpContext.Current.Response.SuppressContent = true; 
				return true; 
			} 
 
			HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public); 
			HttpContext.Current.Response.Cache.SetLastModified(latest); 
			HttpContext.Current.Response.Cache.SetETag(latest.Ticks.ToString() + ":03"); 
 
			return false; 
		} 
	} 
}