添加项目文件。

TechHelper.Server/Context/ApplicationContext.cs

@@ -0,0 +1,41 @@
+using TechHelper.Context.Configuration;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+using Entities.Contracts;
+
+namespace TechHelper.Context
+{
+	public class ApplicationContext : IdentityDbContext<User, IdentityRole<Guid>, Guid>
+	{
+		public ApplicationContext(DbContextOptions options)
+			: base(options) { }
+
+		public DbSet<AssignmentClass> AssignmentClasses { get; set; }
+		public DbSet<Assignment> Assignments { get; set; }
+		public DbSet<AssignmentQuestion> AssignmentGroups { get; set; }	
+		public DbSet<AssignmentQuestion> AssignmentQuestions { get; set; }	
+		public DbSet<Class> Classes { get; set; }	
+		public DbSet<ClassTeacher> ClassStudents { get; set; }	
+		public DbSet<ClassTeacher> ClassTeachers { get; set; }
+		public DbSet<Question> Questions { get; set; }	
+		public DbSet<Submission> Submissions { get; set; }
+		public DbSet<SubmissionDetail> SubmissionDetails { get; set; }	
+
+		protected override void OnModelCreating(ModelBuilder builder)
+		{
+			base.OnModelCreating(builder);
+			builder.ApplyConfiguration(new RoleConfiguration());
+			builder.ApplyConfiguration(new AssignmentConfiguration());
+			builder.ApplyConfiguration(new AssignmentClassConfiguration());
+			builder.ApplyConfiguration(new AssignmentGroupConfiguration());
+			builder.ApplyConfiguration(new AssignmentQuestionConfiguration());
+			builder.ApplyConfiguration(new ClassConfiguration());
+			builder.ApplyConfiguration(new ClassStudentConfiguration());
+			builder.ApplyConfiguration(new ClassTeacherConfiguration());
+			builder.ApplyConfiguration(new QuestionConfiguration());
+			builder.ApplyConfiguration(new SubmissionConfiguration());
+			builder.ApplyConfiguration(new SubmissionDetailConfiguration());
+		}
+	}
+}