URL Rewrite Using ASP.net 3.5 or Over

The blog will explin how we can achieve url rewriting in ASP.net 3.5 or Over.

Step 1 : Create a helper class title "SiteRouteHandler.cs".

#region System

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.Routing;

using System.Web.Compilation;

#endregion



namespace UrlRewrite

{

    /// <summary>

    /// Handler for routing

    /// </summary>

    public class SiteRouteHandler : IRouteHandler

    {

        #region Properties



        /// <summary>

        /// Page Virtual Path

        /// </summary>

        public string PageVirtualPath { get; set; }



        #endregion



        #region Implements IRouteHandler



        /// <summary>

        /// Gets the handler in return

        /// </summary>

        /// <param name="requestContext"></param>

        /// <returns></returns>

        public IHttpHandler GetHttpHandler(RequestContext requestContext)

        {

            Page page = BuildManager.CreateInstanceFromVirtualPath(PageVirtualPath, typeof(Page)) as Page;

            foreach (var item in requestContext.RouteData.Values)

            {

                HttpContext.Current.Items["qparam." + item.Key] = item.Value;

            }

            return page;

        }



        #endregion

    }

}

Step 2 : In global.asax.cs file declare the routes you want to give to the pages with a particular pattern. Use the SiteRouteHandler.cs class for getting the params mentioned in the route pattern. The "{ID}", "{AspxPage}" and "{PageNumber}" are the dynamic values which can be used on our aspx page for manupulation. So if the link is "http://localhost/UrlReWrite/blog/123/This-is-a-blog.aspx/32". Than according to the pattern "123" is {ID}, "This-is-a-blog" is {AspxPage} and 32 is {PageNumber}. "~/Blog.aspx" is the actual page.

using System.Web.Routing;

protected void Application_Start(object sender, EventArgs e)

{

  //Clears all route

  RouteTable.Routes.Clear();

  //Handles the route

  RouteTable.Routes.Add("Blog", new Route("blog/{ID}/{AspxPage}.aspx/{PageNumber}", new SiteRouteHandler() { PageVirtualPath = "~/Blog.aspx" }));

}

Step 3 : Now on Blog.aspx we can use params to retrieve the data.

/// <summary>

/// The blog id from the query string

/// </summary>

private int BlogID

{

    get

    {

        if (Context.Items["qparam.ID"] == null)

        {

            return 0;

        }

        return Convert.ToInt32(Context.Items["qparam.ID"]);

    }

}



/// <summary>

/// The blog id from the query string

/// </summary>

private string AspxPage

{

    get

    {

        if (Context.Items["qparam.AspxPage"] == null)

        {

            return string.Empty;

        }

        return Context.Items["qparam.AspxPage"].ToString();

    }

}



/// <summary>

/// The Page Number

/// </summary>

private int PageNumber

{

    get

    {

        if (Context.Items["qparam.PageNumber"] == null)

        {

            return 0;

        }

        return Convert.ToInt32(Context.Items["qparam.PageNumber"]);

    }

}

Please let me know about your thoughts.