Throw new invalidargumentexception view name not found

A classic error!

The error throw new InvalidOperationException("View name not found"); typically occurs when the ASP.NET MVC framework is unable to find a view that matches the name specified in the View() method.

Here are some common reasons that might cause this error:

1. Typo in view name: Double-check that the view name is spelled correctly and matches the name of the view file (e.g., MyView.cshtml).
2. View file not found: Ensure that the view file exists in the correct location (e.g., ~/Views/MyController/MyView.cshtml).
3. View name not matching the controller: Verify that the view name matches the name of the controller action (e.g., MyController.MyAction() should render MyView.cshtml).
4. View engine not set: Make sure that the view engine is set correctly in the Web.config file (e.g., <add key="ViewEngine" value="System.Web.Mvc.RazorViewEngine" />).
5. View not registered: Check that the view is registered in the RouteConfig.cs file (e.g., routes.MapRoute("MyRoute", "MyController/MyAction", new { controller = "MyController", action = "MyAction" });).

To troubleshoot this issue, you can try the following:

1. Check the error message for more details, such as the view name that was not found.
2. Use the debugger to step through the code and see where the error occurs.
3. Verify that the view file exists and is correctly named.
4. Check the View() method in your controller to ensure that it is correctly configured.
5. Try rendering a different view to see if the issue is specific to this view.

If none of these suggestions help, please provide more details about your project, including the code and configuration files, and I'll do my best to assist you further!