祝你好运。
我在控制台中收到这些错误：
Severity Code Description Project File Line Suppression State
Error CS0246 The type or namespace name 'AddTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_AddTeacher_cshtml.g.cs 123 Active
Error CS0246 The type or namespace name 'AddTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_AddTeacher_cshtml.g.cs 126 Active
Error CS0246 The type or namespace name 'AddTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_AddTeacher_cshtml.g.cs 125 Active
Error CS0246 The type or namespace name 'AddStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_AddStudent_cshtml.g.cs 113 Active
Error CS0246 The type or namespace name 'AddStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_AddStudent_cshtml.g.cs 112 Active
Error CS0246 The type or namespace name 'AddStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_AddStudent_cshtml.g.cs 110 Active
Error CS0246 The type or namespace name 'AddClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_AddClass_cshtml.g.cs 109 Active
Error CS0246 The type or namespace name 'AddClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_AddClass_cshtml.g.cs 108 Active
Error CS0246 The type or namespace name 'AddClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_AddClass_cshtml.g.cs 106 Active
Error CS0246 The type or namespace name 'ManageClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_ManageClass_cshtml.g.cs 62 Active
Error CS0246 The type or namespace name 'ManageStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_ManageStudent_cshtml.g.cs 62 Active
Error CS0246 The type or namespace name 'ManageTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_ManageTeacher_cshtml.g.cs 62 Active
Error CS0246 The type or namespace name 'ManageClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_ManageClass_cshtml.g.cs 61 Active
Error CS0246 The type or namespace name 'ManageStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_ManageStudent_cshtml.g.cs 61 Active
Error CS0246 The type or namespace name 'ManageTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_ManageTeacher_cshtml.g.cs 61 Active
Error CS0246 The type or namespace name 'ManageClassPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_ClassManage_ManageClass_cshtml.g.cs 59 Active
Error CS0246 The type or namespace name 'ManageStudentPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_StudentManage_ManageStudent_cshtml.g.cs 59 Active
Error CS0246 The type or namespace name 'ManageTeacherPage' could not be found (are you missing a using directive or an assembly reference?) StudentAndClassWebApp C:UsersemirysourcereposStudentAndClassWebAppStudentAndClassWebAppMicrosoft.NET.Sdk.Razor.SourceGeneratorsMicrosoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGeneratorPages_TeacherManage_ManageTeacher_cshtml.g.cs 59 Active
出于某种原因，当我突然调试它时，它开始出现错误。
由于所有的错误都是一样的，所以我放了一页的代码：
@page
@model AddTeacherPage
@{
ViewData["Title"] = "Home page";
}
<div class="p-3 mb-2 bg-dark text-white">
<h2 class="display-4">Add Teacher</h2>
</div>
<p>Welcome the teacher management page.</p>
<form>
<div class="form-group">
<label for="teacherIdInput">Teacher ID (number only):</label>
<input type="number" class="form-control" min="0" id="TeacherId" placeholder="Teacher ID">
</div>
<div class="form-group">
<label for="teacherNameInput">Teacher Name:</label>
<input type="text" class="form-control" id="TeacherNameID" placeholder="Teacher Name">
</div>
<select class="form-control">
<label for="teacherClassSelect">Teacher Class</label>
<option>Test</option>
</select>
</form>
我该如何解决这个问题？提前感谢您的帮助。
点击第2行的AddTeacherPage。按Ctrl+。快速行动。应该有一个选项可以将using语句添加到页面中，该语句定义了包含模型类的命名空间。