Blazor项目复制Razor页面至客户端时遇Visual Studio异常求助

问题描述 #

我是编程新手，跟着教程开发Blazor Web App项目，尝试将Server项目中的Razor页面复制到Client项目时，出现错误提示：Visual Studio ran into an unexpected problem,and may affect some project system functions。操作时未运行应用，怀疑问题出在Visual Studio设置或项目系统方面。

相关Razor文件代码 #

@page "/EditVeri"
@page "/EditVeri/{id:int}"
@inject IVeriService VeriService
@rendermode InteractiveWebAssembly

<h3>Veri Oluştur</h3>
<br />
<EditForm Model="veri" OnSubmit="HandleSubmit" FormName="editVeri">
    <label>Kodu</label>
    <InputText @bind-Value="veri.Kodu">@veri.Kodu</InputText>
    <br />
    <label>Adı</label>
    <InputText @bind-Value="veri.Adı">@veri.Adı  </InputText>
    <button type="submit" class="btn btn-primary">Submit</button>
</EditForm>
<br />
<br />
<a class="VeriOnay">Veri Eklendi</a>

@code {
    [Parameter]
    public int id { get; set; }
    [SupplyParameterFromForm]
    Veris veri { get; set; } = new Veris { Adı = string.Empty, Kodu = string.Empty };
    <style>
    </style>
    async Task HandleSubmit()
    {
        await VeriService.AddVeri(veri);

        await Task.Delay(2000);
    }
}

报错日志 #

=====================
11.09.2024 14:01:05
Recoverable
System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.ProjectSystem.ProjectSerialization.CachedProjectItemDefinition.GetMetadata(String name)
   at Microsoft.VisualStudio.ProjectSystem.Items.SourceItemsService.<<GetAllLinkedItemsAsync>b__94_0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__131`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__131`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.CopyPaste.DiskBasedCopyPasteItemHandler.<GatherExistingLinkedItemsPathAsync>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.CopyPaste.DiskBasedCopyPasteItemHandler.<ValidateItemListAsync>d__26.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<>c__DisplayClass58_0.<<DoPasteCoreAsync>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__130.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.ProjectSystem.ProjectLockService.<ExecuteWithinLockAsync>d__130.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<DoPasteCoreAsync>d__58.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<DoPasteAsync>d__57.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<>c__DisplayClass34_0.<<DropArea>b__1>d.MoveNext()
===================

排查解决步骤 #

• 清理项目缓存并重启VS：

  1. 关闭Visual Studio，删除项目目录下的.vs、bin、obj文件夹
  2. 重新打开项目，尝试再次复制粘贴操作

• 替换复制粘贴方式：
  不要直接复制Server项目中的文件，而是在Client项目右键新建Razor组件，手动将原文件代码复制进去，避免VS项目系统识别异常

• 检查服务依赖：
  确认IVeriService在Client项目的Program.cs中已正确注册，且服务实现是WebAssembly可兼容的（不能直接使用Server端的EF Core等仅服务端可用的实现）

• 修复Visual Studio：
  打开VS安装程序，选择“修改”，点击“修复”选项，修复可能损坏的组件

• 检查项目文件：
  右键Client项目选择“编辑项目文件”，查看是否存在无效的项目项引用，删除异常条目后保存

内容的提问来源于stack exchange，提问作者LeventAydın