ASP.NET核心添加视图参数名称路径不能为空错误

我正在尝试添加视图到我的ASP.NET核心MVC项目,我收到一个错误.

错误消息是

 There was an error running the selected code generator:
 'Value  cannot be null. 
 Parameter name:path'

该视图将用于ViewComponent.

我的步骤是

 Right click -> 
 Add View -> 
 Type View Name -> 
 Uncheck 'Use a Layout Page' -> 
 Template : Empty -> 
 Click Add.

我搜索了一下,但找不到任何结果.

编辑:

这是一个Startup.cs

namespace Udemy.MvcWebUI
{
public class Startup
{
    // This method gets called by the runtime. Use this method to add 
    //services to the container.
    // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddScoped();
        services.AddScoped();

        services.AddScoped();
        services.AddScoped();

        services.AddScoped();
        services.AddScoped();

        services.AddScoped();
        services.AddScoped();

        services.AddScoped();
        services.AddScoped();

        services.AddScoped();
        services.AddScoped();

        services.AddDbContext(optiOns=> options.UseSqlServer(@"Server=localhost\SQLEXPRESS;Database=Events;
                                        User Id=sa;Password=Omurcan.1994;"));

        services.AddMvc();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseFileServer();
        app.UseNodeModules(env.ContentRootPath);
        app.UseMvcWithDefaultRoute();

        // db tanimi icin
        using (var serviceScope = app.ApplicationServices.GetService().CreateScope())
        {
            var cOntext= serviceScope.ServiceProvider.GetRequiredService();
            context.Database.EnsureCreated();
        }
    }
}
}

我该如何解决？

谢谢你的帮助.

Microsoft.VisualStudio.Web.CodeGeneration.Design您的项目可能缺少包裹!

Microsoft.VisualStudio.Web.CodeGeneration.Design根据您的项目.NET Core版本安装正确版本的nuget包.

然后,如果您最近从任何较低版本将项目更新到.NET Core 2.1,那么也将项目的包更新到最新版本.

然后不要忘记下载 .NET Core SDK 的最新稳定版本(2.1.500)并安装在您的计算机上.

希望你的问题能够得到解决!