Newbie - Live Examples - Cannot find ASP.NET Development Server

[Lowell]

Hello all,

I am new to Telerik product line. Just installed the Telerik UI for ASP.NET AJAX Q1 2015 along with the Live Demos, but when trying to launch the Live Demo, it throws an error "Cannot find ASP.NET Development Server".

What I have tried:
- Uninstalled and Reinstalled the entire Telerik UI for ASP.NET AJAX Q1 2015; same error occurs.
- Restarted computer; same error occurs.
- Copied "Live Demos" folder from C:\Program Files (x86)\Telerik\UI for ASP.NET AJAX Q1 2015\Live Demos to C:\Users\myAccount\Desktop and tried to start; same error occurs.

Any idea?

My system specs:
- Windows 8.1 Enterprise x64
- Visual Studio 2013 Update 4

[Lowell]

ASP.NET MVC Live Demo works without any issues.
Only having trouble with the ASP.NET AJAX component.

[Lowell]

Really? No response from Telerik?

[Danail Vasilev]

Hello Lowell,

Generally we do not guarantee responses to forum threads, although we make efforts to respond them, because they are a public resource. We guarantee, however, a 24hours response time for support tickets which require a subscription and 72hours response time for trial accounts. More information on the matter is available here - http://www.telerik.com/purchase/support-plans/devtools

As for the current question I  have already replied to it in the support ticket that was opened by you, so I paste my answer below for the rest of the community.

The ASP.NET Development Server is the development server that comes with Visual Studio and is used for running your applications in a test environment. When Visual Studio is installed, it includes everything needed to start developing applications, for example .NET Framework and a development server. If there is something wrong with this setup, I would suggest reinstalling VS as there could be something corrupted in the current installation.

You can check the following article for more information about the different types of web servers that are used by Visual Studio: http://msdn.microsoft.com/en-us/library/58wxa9w5%28v=vs.100%29.aspx.

You can also try to open demos from IIS Express server in Visual Studio or host the demos to IIS server.

If you are still having difficulties after reviewing the information above, please provide a more detailed description of what you want to install, what you did before encountering the error and what do you want to achieve so that I can help you.

Regards,
Danail Vasilev
Telerik

 

 

[David]

Hello,

We are experiencing the same issue regarding the Telerik ASP.NET AJAX demos.  When launching "Live Examples - Telerik UI for ASP.NET AJAX Q1 2015 SP1", an error is displayed indicating "Cannot find the ASP.NET Development server!".


The machine configuration is as follows:

 - Clean install of Windows 7 (64bit) with SP1
 - All available Windows Updates applied through 5/1/2015
 - Windows 7 built-in IIS enabled
 - SQL Server Express 2008R2 (64 bit)
 - Visual Studio 2013 Professional
 - Telerik ASP.NET AJAX Q1 2015 SP1 w/Live Demos (installed using the Telerik control panel)


Microsoft Visual Studio 2013 does not include the ASP.NET development server, but instead relies on IIS Express which is installed with VS2013.  With this in mind, I assume that the installation should register the live demos application in IIS Express rather than the ASP.NET Development server which does not exist.

The live demos are pretty handy when implementing particular components for the first time, so I would like to get this resolved.

[Danail Vasilev]

Hi David,

We are aware of the mentioned issue with the demos and it has already been reported to the corresponding team.

For the time being you can host the demos on IIS server or open them through the solution file in Visual Studio and then select IIS Express for the server.

Regards,
Danail Vasilev
Telerik

 

 

[Bhavika]

The ASP.NET Development Server, also known as Cassini, was a lightweight server included with older versions of Visual Studio to help developers test their web applications locally without the need for IIS.

Why Can’t You Find It?

1. Using a Modern Version of Visual Studio
   Starting from Visual Studio 2013, Microsoft replaced the ASP.NET Development Server with IIS Express. IIS Express offers more features and is closer to a production environment.

2. Project Settings
   If you're using an older version of Visual Studio that supports Cassini, ensure the project is configured to use it.

   • Right-click on your project in Solution Explorer.
   • Go to Properties > Web.
   • Check the option to use the ASP.NET Development Server if available.
     

3. Installation Issue
   If you're using an older version of Visual Studio but still can’t find the server, it might not have been installed. You may need to repair your Visual Studio installation.

Recommended Solutions

Switch to IIS Express
If you're on a newer version of Visual Studio, use IIS Express instead:

• It’s already built into Visual Studio.
• Ensure it's selected under Project Properties > Web > Servers.

Run with .NET CLI or Kestrel

dotnet run

Check Compatibility

If you're tied to legacy projects and need Cassini, consider using an older version of Visual Studio compatible with the ASP.NET Development Server.