ASP.NET MVC: Insert Update Delete and View data from SQL Database

Step 1: Create a Student class, then run add-migration to create a student table

[Table("Students")]
public class Student
{
    [Key]
    public string StudentID { get; set; }
    [StringLength(100)]
    public string FullName { get; set; }
    [StringLength(100)]
    public string Email { get; set; }
    [StringLength(255)]
    public string Address { get; set; }
}

Open IdentityModels class, then add a Student property to the ApplicationDbContext class

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("DefaultConnection", throwIfV1Schema: false)
    {
    }

    public DbSet<Student> Students { get; set; }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }
}

Step 2: Create a Student controller with MVC 5 Razor as below

public class StudentController : Controller
{
    private ApplicationDbContext db = new ApplicationDbContext();

    // GET: Student
    public async Task<ActionResult> Index()
    {
        return View(await db.Students.ToListAsync());
    }

    // GET: Student/Details/5
    public async Task<ActionResult> Details(string id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        Student student = await db.Students.FindAsync(id);
        if (student == null)
        {
            return HttpNotFound();
        }
        return View(student);
    }

    // GET: Student/Create
    public ActionResult Create()
    {
        return View();
    }

    // POST: Student/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Create([Bind(Include = "StudentID,FullName,Email,Address")] Student student)
    {
        if (ModelState.IsValid)
        {
            db.Students.Add(student);
            await db.SaveChangesAsync();
            return RedirectToAction("Index");
        }

        return View(student);
    }

    // GET: Student/Edit/5
    public async Task<ActionResult> Edit(string id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        Student student = await db.Students.FindAsync(id);
        if (student == null)
        {
            return HttpNotFound();
        }
        return View(student);
    }

    // POST: Student/Edit/5
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Edit([Bind(Include = "StudentID,FullName,Email,Address")] Student student)
    {
        if (ModelState.IsValid)
        {
            db.Entry(student).State = EntityState.Modified;
            await db.SaveChangesAsync();
            return RedirectToAction("Index");
        }
        return View(student);
    }

    // GET: Student/Delete/5
    public async Task<ActionResult> Delete(string id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        Student student = await db.Students.FindAsync(id);
        if (student == null)
        {
            return HttpNotFound();
        }
        return View(student);
    }

    // POST: Student/Delete/5
    [HttpPost, ActionName("Delete")]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> DeleteConfirmed(string id)
    {
        Student student = await db.Students.FindAsync(id);
        db.Students.Remove(student);
        await db.SaveChangesAsync();
        return RedirectToAction("Index");
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            db.Dispose();
        }
        base.Dispose(disposing);
    }
}

Step 3: You can use MVC Razor Template to automatically generate views

Index view

@model IEnumerable<MvcDemo.Models.Student>
@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.FullName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Email)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Address)
        </th>
        <th></th>
    </tr>
    @foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.FullName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Email)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Address)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.StudentID }) |
            @Html.ActionLink("Details", "Details", new { id=item.StudentID }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.StudentID })
        </td>
    </tr>
}
</table>

Create view

@model MvcDemo.Models.Student
@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>

@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()    
    <div class="form-horizontal">
        <h4>Student</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.StudentID, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.StudentID, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.StudentID, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.FullName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FullName, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FullName, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.Email, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Email, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Email, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.Address, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Address, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}
<div>
    @Html.ActionLink("Back to List", "Index")
</div>

Edit view

@model MvcDemo.Models.Student
@{
    ViewBag.Title = "Edit";
}

<h2>Edit</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()    
    <div class="form-horizontal">
        <h4>Student</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.StudentID)
        <div class="form-group">
            @Html.LabelFor(model => model.FullName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FullName, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.FullName, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.Email, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Email, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Email, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.Address, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Address, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </div>
    </div>
}
<div>
    @Html.ActionLink("Back to List", "Index")
</div>

Delete view

@model MvcDemo.Models.Student
@{
    ViewBag.Title = "Delete";
}

<h2>Delete</h2>

<h3>Are you sure you want to delete this?</h3>
<div>
    <h4>Student</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            @Html.DisplayNameFor(model => model.FullName)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.FullName)
        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Email)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.Email)
        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Address)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.Address)
        </dd>
    </dl>
    @using (Html.BeginForm()) {
        @Html.AntiForgeryToken()

        <div class="form-actions no-color">
            <input type="submit" value="Delete" class="btn btn-default" /> |
            @Html.ActionLink("Back to List", "Index")
        </div>
    }
</div>

Details view

@model MvcDemo.Models.Student
@{
    ViewBag.Title = "Details";
}

<h2>Details</h2>

<div>
    <h4>Student</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            @Html.DisplayNameFor(model => model.FullName)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.FullName)
        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Email)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.Email)
        </dd>
        <dt>
            @Html.DisplayNameFor(model => model.Address)
        </dt>
        <dd>
            @Html.DisplayFor(model => model.Address)
        </dd>
    </dl>
</div>
<p>
    @Html.ActionLink("Edit", "Edit", new { id = Model.StudentID }) |
    @Html.ActionLink("Back to List", "Index")
</p>

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