Blazor Razor页面登录注册功能报错CS0120、CS0117求助

API 探路者

2026-6-21

解决NavMenu.razor中的CS0120和CS0117错误

错误原因分析

CS0120：错误地将NavigationManager作为静态类调用，实际上它是依赖注入的服务实例，必须通过注入对象访问成员。
CS0117：缺少必要的命名空间引用，导致LocationChangedEventArgs类型无法被编译器识别。

修正后的完整代码

@inject NavigationManager Navigation
@using Microsoft.AspNetCore.Components

<div class="top-row container-fluid">
    <a class="navbar" href="">WebsiteProject</a>
    <input type="checkbox" title="Navigation menu" class="navbar-toggler" data-bs-toggle="collapse" data-bs-target="#navbar" />
</div>

<div class="nav-scrollable collapse navbar-collapse" id="navbar">
    <nav class="">
        <div class="nav-item px-3">
            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
                Home
            </NavLink>
        </div>
        <div class="nav-item px-3">
            <NavLink class="nav-link" href="Blog">
                Blog
            </NavLink>
        </div>
    </nav>
</div>

@code {
    private string? currentUrl;

    protected override void OnInitialized()
    {
        currentUrl = Navigation.ToBaseRelativePath(Navigation.Url);
        Navigation.LocationChanged += OnLocationChanged;
    }

    private void OnLocationChanged(object? sender, LocationChangedEventArgs e)
    {
        currentUrl = Navigation.ToBaseRelativePath(e.Location);
        StateHasChanged();
    }

    public void Dispose()
    {
        Navigation.LocationChanged -= OnLocationChanged;
    }
}

核心修正点

替换静态调用为实例调用：将所有NavigationManager.XX的写法改为注入的实例Navigation.XX，比如Navigation.ToBaseRelativePath、Navigation.Url，直接解决CS0120错误。
添加命名空间引用：在文件顶部添加@using Microsoft.AspNetCore.Components，让编译器识别LocationChangedEventArgs类型，消除CS0117错误。