Web/UrlHelper.cs

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/*
 * Author: Kishore Reddy
 * Url: http://commonlibrarynet.codeplex.com/
 * Title: CommonLibrary.NET
 * Copyright: � 2009 Kishore Reddy
 * License: LGPL License
 * LicenseUrl: http://commonlibrarynet.codeplex.com/license
 * Description: A C# based .NET 3.5 Open-Source collection of reusable components.
 * Usage: Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using ComLib;


namespace ComLib.Web
{
    /// <summary>
    /// Url helper to provide various utitlity methods.
    /// 
    /// 1. Provide valid url's for either local development maching running
    ///    a website from visual studio OR IIS.
    /// 
    /// 2. Get url's that have been rewritten.
    /// </summary>
    public class UrlHelper
    {
        private static bool _isRewritingEnabled = false;
        private static UrlMapper _urlMapper;


        #region Properties
        /// <summary>
        /// Get or set flag indicating if url-rewriting is enabled.
        /// </summary>        
        public static bool IsRewritingEnabled
        {
            get { return _isRewritingEnabled; }
            set
            {
                _isRewritingEnabled = value;
                if (_isRewritingEnabled && _urlMapper == null)
                {
                    throw new InvalidOperationException("Must provide url mapping if performing url-rewriting.");
                }
            }
        }


        /// <summary>
        /// Instance of the url mapper.
        /// </summary>
        public UrlMapper UrlMapperProvider
        {