Does a view exist in ASP.NET MVC?

 private bool ViewExists(string name)
 {
     ViewEngineResult result = ViewEngines.Engines.FindView(ControllerContext, name, null);
     return (result.View != null);
 }

For those looking for a copy/paste extension method:

public static class ControllerExtensions
{
    public static bool ViewExists(this Controller controller, string name)
    {
        ViewEngineResult result = ViewEngines.Engines.FindView(controller.ControllerContext, name, null);
        return (result.View != null);
    }
}

What about trying something like the following assuming you are using only one view engine:

bool viewExists = ViewEngines.Engines[0].FindView(ControllerContext, "ViewName", "MasterName", false) != null;

Here's another [not necessarily recommended] way of doing it

 try
 {
     @Html.Partial("Category/SearchPanel/" + Model.CategoryKey)
 }
 catch (InvalidOperationException) { }