1. 首先，在您的控制器中，创建一个名为“NavigationController”的新控制器。将以下代码添加到该控制器中：

public class NavigationController : Controller
{
    private readonly RoleManager roleManager;
    private readonly UserManager userManager;

    public NavigationController(RoleManager roleManager, UserManager userManager)
    {
        this.roleManager = roleManager;
        this.userManager = userManager;
    }

    public async Task Menu()
    {
        List roles = new List();
        IdentityUser user = await userManager.GetUserAsync(User);
        if (user != null)
        {
            roles = (List)await userManager.GetRolesAsync(user);
        }
        ViewBag.Roles = roles;
        return PartialView("_Menu");
    }
}

2. 然后，创建一个名为“_Menu.cshtml”的部分视图，并将以下代码添加到该部分视图中：

@using Microsoft.AspNetCore.Identity
@inject SignInManager signInManager
@inject UserManager userManager

@if (User.Identity.IsAuthenticated)
{
    

        

            @if (ViewBag.Roles.Contains("Admin"))
            {
                

                    
                        dashboard
                        
Dashboard
                    
                
            }
            

                
                    home
                    
Home
                
            
            @if (ViewBag.Roles.Contains("User"))
            {
                

                    
                        person
                        
User
                    
                
            }
            

                
                    exit_to_app
                    <