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When I try to do routing I get a parse error in ASP.NET Web Forms

I published the web site and uploaded it to FTP (ASP.NET Web Forms C#).
I use routing in the project and this is my routing page's code (I only write 1):
protected void Application_Start(object sender, EventArgs e)
{
RegisterRoutes(RouteTable.Routes);
}
public void RegisterRoutes(RouteCollection routes)
{
routes.MapPageRoute("HomePage", "HomePage", "~/Views/Default.aspx");
}
And my folders and pages are as follows:
The code of the Default.aspx page outside the Views folder:
protected void Page_Load(object sender, EventArgs e)
{
Response.Redirect("/Views/");
}
When I try to enter mywebsite.com and enter the site, I get the following error:
But when I try to enter mywebsite.com/HomePage it works. I want to go to the main page when I write the site name directly. Where do I make mistakes?
I forgot to add: It's working on local btw. But doesn't work on FTP.

You have your routing configured incorrectly. The the home page URL is setup as HomePage instead of an empty string (/HomePage).
routes.MapPageRoute("HomePage", "HomePage", "~/Views/Default.aspx");
Change that to (/):
routes.MapPageRoute("HomePage", "", "~/Views/Default.aspx");
Also, delete your "Default.aspx page outside of Views folder". That is going to conflict with your routing and (even worse) it will cause an HTTP 302 redirect to your home page. An HTTP 302 redirect returned from the request tells the user's browser to make a second request to your server, which is bad for both performance and SEO reasons.
Given that your /HomePage URL is working correctly, the above changes should fix your problem.

how to show different url in C#?

How can i change view like "www.abc.com/welcome" in browser but actual path is "www.abc.com/welcome.aspx".
And when i type "www.abc.com/welcome" then will go path "www.abc.com/welcome.aspx" but still view like "www.abc.com/welcome".
I have try this code on web.config below but got error:Unrecognized configuration section urlMappings
<urlMappings enabled="true">
<add url="~/welcome.aspx" mappedUrl="~/welcome" />
</urlMappings>
I wonder still got other way?

Where did you get the information about this urlMappings section? It's not supported by default by IIS or ASP.Net.
I think you might want to look at the UrlRewrite Module.
With this it's trivial to setup url rewrites like the one you want.

If you're using a URL rewriting module, you need to make sure which version of IIS you will be running on before something like "/welcome" will work. IIS6 doesn't support extensionless URLs by default. You'll need to have an ISAPI filter running for it, or you'll need to run on IIS7.

I suggest you to use routing How to: Use Routing with Web Forms.
You will need to register the UrlRoutingModule and the UrlRoutingHandler handler to be able to use routing feature (more details could be found in the article above).
And then in global.asax
void Application_Start(object sender, EventArgs e)
{
RegisterRoutes(RouteTable.Routes);
}
public static void RegisterRoutes(RouteCollection routes)
{
routes.Add("BikeSaleRoute", new Route
(
"bikes/sale",
new CustomRouteHandler("~/Contoso/Products/Details.aspx")
));
}

ASP.NET Routing webform query

I have a ASP.net Web forms project that I am working on.
I need to have a add club page where the admin can add a club to the website.
When the club is added it creates a small website within my website for that club automatically. I think this uses some form of string builder.
Then that club should be able to store their own details on that page.
I was going to do this doing asp.net routing. Would this be the correct way of going about this?
Having looked at different examples i would need to have the url for the webpage automatically generated

assuming you are using asp.net 4.0.. something like this
Global.asax.cs
protected void Application_Start(Object sender, EventArgs e) {
RegisterRoutes(RouteTable.Routes);
}
protected virtual void RegisterRoutes(RouteCollection routes) {
routes.MapPageRoute("clubs"
, "clubs/listing//{clubNumber}"
, "~/Clubs/ManageClub.aspx");
}
so urls like /Clubs/Listing/ClubNum101 would resolve to /Clubs/ManageClub.aspx
In ManageClub.aspx check for RouteData e.g.
if (Page.RouteData != null && Page.RouteData.Values.ContainsKey("clubNumber")) {
//do something here
}

Remove HttpPage Extension in asp.net web application

I want to remove Http Page Extension like this
my actual page:
http://test.com/dashboard.aspx
i need to modify as follows
http://test.com/
for all redirection of .aspx page.
P.s:
i dont want to use URL rewriting.

Use asp.net 4's routing engine. You can specify a routing rule in asp.net 4 as a default route.
Check out:
http://www.xdevsoftware.com/blog/post/Default-Route-in-ASPNET-4-URL-Routing.aspx
for a very basic one that may work in your scenario try this in your global.asax.cs to map everything to say default.aspx
void Application_Start(object sender, EventArgs e)
{
RegisterRoutes(RouteTable.Routes);
}
public static void RegisterRoutes(RouteCollection routes)
{
routes.MapPageRoute("Default", "{*whatever}", "~/default.aspx");
}

You can write HttpModule where you can scan incoming url and make all that you want before request will be processed.
http://msdn.microsoft.com/en-us/library/ms227673.aspx

Search engine friendly urls in ASP dot NET

Objective was:
To change pages like details.aspx?GUID=903901823908129038 to clean ones like /adrian_seo
Achieved:
Now using Response.AddHeader("Location", url);
I am able to remove all uppercase urls. I use the following function:
protected void Page_Load(object sender, EventArgs e)
{
string url = Request.Url.ToString();
if (url != Request.Url.ToString().ToLower())
{
url = Request.Url.ToString().ToLower();
Response.Status = "301 Moved Permanently";
Response.AddHeader("Location", url);
}
}
Question is:
How do I change these to clean urls like /adrian_seo
I mean how do I handle requests coming to /adrian_seo and how do I show my old pages with new urls.
Do I need to use Global.asax?

Have a look into ASP.NET routing.

Use an HttpModule:
public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(context_BeginRequest);
}
void context_BeginRequest(object sender, EventArgs e)
{
HttpContext context = ((HttpApplication)sender).Context;
if (context.Request.RawUrl.ToLowerInvariant().Equals("YOURSEOURL"))
context.RewritePath("YOURNONSEOURL");
}
Note that you don't want to hard code all this. Find some sort of regex to match your need, like if the SEO url is: /page/234234/This-is-my-page-title, you grab the 234234 and rewrite the path to page.aspx?pageid=234234
UPDATE
You can also use the IIS 7 Rewrite Module

I recommend using the UrlRewritingNet component. When writing your own library you need to overcome some difficulties, this library already handles that stuff for you...
It is a rewrite-module tuned for
ASP.NET 2.0, and offers support for
Themes and Masterpages
Regular Expressions
Good Postback-Urls
Cookieless Sessions
Runs in Shared-Hosting or Medium-Trust enviroments
OutputCache is supported
Redirects possible, even to other Domains
To enable extenionless urls in asp.net with IIS 6 or lower your also need to configure IIS to let asp.net handle all incoming requests.

You could use http://urlrewriter.net/ which can be used on asp.net 1.1 ->

After some Read up on Routing in Asp.net:
http://blog.eworldui.net/post/2008/04/ASPNET-MVC---Legacy-Url-Routing.aspx
Which brings both 301 redirects for SEO page rank and Asp.net Routing for permanent organic SEO solution.