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11 files changed

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‎ContosoUniversity/Features/Instructors/Create.cshtml

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‎ContosoUniversity/Features/Instructors/CreateEdit.cs

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using System;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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using System.Threading.Tasks;
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using AutoMapper;
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using AutoMapper.QueryableExtensions;
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using ContosoUniversity.Data;
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using ContosoUniversity.Models;
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using FluentValidation;
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using MediatR;
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using Microsoft.EntityFrameworkCore;
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namespace ContosoUniversity.Features.Instructors
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{
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public class CreateEdit
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{
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public class Query : IRequest<Command>
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{
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public int? Id { get; set; }
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}
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public class QueryValidator : AbstractValidator<Query>
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{
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public QueryValidator()
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{
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RuleFor(m => m.Id).NotNull();
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}
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}
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public class Command : IRequest<int>
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{
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public Command()
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{
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AssignedCourses = new List<AssignedCourseData>();
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CourseAssignments = new List<CourseAssignment>();
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SelectedCourses = new string[0];
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}
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public int? Id { get; set; }
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public string LastName { get; set; }
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[Display(Name = "First Name")]
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public string FirstMidName { get; set; }
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[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}")]
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public DateTime? HireDate { get; set; }
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[Display(Name = "Location")]
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public string OfficeAssignmentLocation { get; set; }
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[IgnoreMap]
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public string[] SelectedCourses { get; set; }
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[IgnoreMap]
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public List<AssignedCourseData> AssignedCourses { get; set; }
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public List<CourseAssignment> CourseAssignments { get; set; }
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public class AssignedCourseData
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{
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public int CourseID { get; set; }
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public string Title { get; set; }
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public bool Assigned { get; set; }
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}
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public class CourseAssignment
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{
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public int CourseID { get; set; }
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}
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}
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public class CommandValidator : AbstractValidator<Command>
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{
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public CommandValidator()
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{
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RuleFor(m => m.LastName).NotNull().Length(0, 50);
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RuleFor(m => m.FirstMidName).NotNull().Length(0, 50);
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RuleFor(m => m.HireDate).NotNull();
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}
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}
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public class QueryHandler : IAsyncRequestHandler<Query, Command>
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{
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private readonly SchoolContext _db;
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public QueryHandler(SchoolContext db)
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{
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_db = db;
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}
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public async Task<Command> Handle(Query message)
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{
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Command model;
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if (message.Id == null)
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{
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model = new Command();
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}
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else
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{
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model = await _db.Instructors
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.Where(i => i.Id == message.Id)
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.Map()
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.SingleOrDefaultAsync<Command>();
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//.ProjectTo<Command>()
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//.SingleOrDefaultAsync();
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}
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PopulateAssignedCourseData(model);
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return model;
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}
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private void PopulateAssignedCourseData(Command model)
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{
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var allCourses = _db.Courses;
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var instructorCourses = new HashSet<int>(model.CourseAssignments.Select(c => c.CourseID));
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var viewModel = allCourses.Select(course => new Command.AssignedCourseData
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{
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CourseID = course.Id,
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Title = course.Title,
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Assigned = instructorCourses.Contains(course.Id)
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}).ToList();
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model.AssignedCourses = viewModel;
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}
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}
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public class CommandHandler : IAsyncRequestHandler<Command, int>
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{
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private readonly SchoolContext _db;
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public CommandHandler(SchoolContext db)
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{
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_db = db;
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}
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public async Task<int> Handle(Command message)
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{
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Instructor instructor;
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if (message.Id == null)
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{
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instructor = new Instructor();
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_db.Instructors.Add(instructor);
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}
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else
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{
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instructor = await _db.Instructors
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.Include(i => i.OfficeAssignment)
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.Include(i => i.CourseAssignments)
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.Where(i => i.Id == message.Id)
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.SingleAsync();
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}
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var courses = await _db.Courses.ToListAsync();
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instructor.Handle(message, courses);
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await _db.SaveChangesAsync();
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return instructor.Id;
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}
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}
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}
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}

‎ContosoUniversity/Features/Instructors/CreateEdit.cshtml

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@model ContosoUniversity.Features.Instructors.CreateEdit.Command
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@{
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ViewBag.Title = Model.Id == null ? "Create" : "Edit";
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}
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<h2>@(Model.Id == null ? "Create" : "Edit")</h2>
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<h4>Instructor</h4>
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<hr />
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<div class="row">
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<div class="col-md-4">
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<form>
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@Html.ValidationDiv()
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@Html.FormBlock(m => m.LastName)
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@Html.FormBlock(m => m.FirstMidName)
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@Html.FormBlock(m => m.HireDate)
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@Html.FormBlock(m => m.OfficeAssignmentLocation)
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<div class="form-group">
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<div class="col-md-offset-2 col-md-10">
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<table>
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<tr>
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@{
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int cnt = 0;
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foreach (var course in Model.AssignedCourses)
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{
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if (cnt++ % 3 == 0)
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{
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@:</tr><tr>
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}
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@:<td>
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<label style="font-weight: normal">
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<input type="checkbox"
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name="selectedCourses"
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value="@course.CourseID"
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@(Html.Raw(course.Assigned ? "checked=\"checked\"" : "")) />
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@course.CourseID : @course.Title
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</label>
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@:</td>
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}
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@:</tr>
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}
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</table>
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</div>
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</div>
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<div class="form-group">
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<input type="submit" value="Save" class="btn btn-default" />
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</div>
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</form>
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</div>
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</div>
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<div>
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<a asp-action="Index">Back to List</a>
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</div>
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@section Scripts {
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@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
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}

‎ContosoUniversity/Features/Instructors/Details.cs

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using System;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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using System.Threading.Tasks;
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using AutoMapper.QueryableExtensions;
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using ContosoUniversity.Data;
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using FluentValidation;
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using MediatR;
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using Microsoft.EntityFrameworkCore;
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namespace ContosoUniversity.Features.Instructors
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{
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public class Details
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{
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public class Query : IRequest<Model>
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{
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public int? Id { get; set; }
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}
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public class Validator : AbstractValidator<Query>
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{
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public Validator()
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{
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RuleFor(m => m.Id).NotNull();
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}
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}
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public class Model
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{
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public int? ID { get; set; }
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public string LastName { get; set; }
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[Display(Name = "First Name")]
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public string FirstMidName { get; set; }
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[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}")]
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public DateTime? HireDate { get; set; }
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[Display(Name = "Location")]
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public string OfficeAssignmentLocation { get; set; }
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}
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public class Handler : IAsyncRequestHandler<Query, Model>
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{
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private readonly SchoolContext _db;
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public Handler(SchoolContext db) => _db = db;
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public Task<Model> Handle(Query message) => _db
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.Instructors
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.Where(i => i.Id == message.Id)
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.ProjectTo<Model>()
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.SingleOrDefaultAsync();
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}
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}
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}

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