// Model
 public partial class Product
 {
     private Category _category;

     public Category Category
     {
         get
         {
             if (_category == null)
            {
                var categoryRepository = new CategoryRepository();

                var cat = categoryRepository.Select(categoryid);

                _category = cat.First();
            }

            return _category;
        }
    }
}

//Controller

public ProductController() : base()
{
      var categoryRepo = new CategoryRepository();
      ViewData["categories"] = categoryRepo.Select().ToList();
}

// View
 <% using (Html.BeginForm()) {%>

     <fieldset>
         <legend>Fields</legend>
         <p>
              <label for="Category">Category:</label>
             <%= Html.DropDownList("categoryid", new SelectList((IEnumerable)ViewData["categories"], "id", "name")) %>
             <%= Html.ValidationMessage("categoryid", "*") %>
         </p>
        <p>
            <label for="name">Name:</label>
            <%= Html.TextBox("name") %>
            <%= Html.ValidationMessage("name", "*") %>
        </p>
        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>

<% } %>

// View
<% using (Html.BeginForm()) {%>

     <fieldset>
         <legend>Fields</legend>
         <p>
             <label for="id">ID:</label>
             <%= Html.Encode(Model.id) %>

         </p>
        <p>
            <label for="category">Category:</label>
            <%= Html.DropDownList("categoryid", new SelectList((IEnumerable)ViewData["categories"], "id", "name")) %>
            <%= Html.ValidationMessage("categoryid", "*") %>
        </p>
        <p>
            <label for="name">Name:</label>
            <%= Html.TextBox("name", Model.name) %>
            <%= Html.ValidationMessage("name", "*") %>
        </p>
        <p>
            <input type="submit" value="Save" />
        </p>
    </fieldset>

<% } %>

//Controller

public ProductController() : base()
{
      var categoryRepo = new CategoryRepository();
      ViewData["categories"] = categoryRepo.Select().ToList();
}

// View
 <% using (Html.BeginForm()) {%>

     <fieldset>
         <legend>Fields</legend>
         <p>
              <label for="Category">Category:</label>
             <%= Html.DropDownList("categoryid", new SelectList((IEnumerable)ViewData["categories"], "id", "name")) %>
             <%= Html.ValidationMessage("categoryid", "*") %>
         </p>
        <p>
            <label for="name">Name:</label>
            <%= Html.TextBox("name") %>
            <%= Html.ValidationMessage("name", "*") %>
        </p>
        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>

<% } %>

// View
<% using (Html.BeginForm()) {%>

     <fieldset>
         <legend>Fields</legend>
         <p>
             <label for="id">ID:</label>
             <%= Html.Encode(Model.id) %>

         </p>
        <p>
            <label for="category">Category:</label>
            <%= Html.DropDownList("categoryid", new SelectList((IEnumerable)ViewData["categories"], "id", "name")) %>
            <%= Html.ValidationMessage("categoryid", "*") %>
        </p>
        <p>
            <label for="name">Name:</label>
            <%= Html.TextBox("name", Model.name) %>
            <%= Html.ValidationMessage("name", "*") %>
        </p>
        <p>
            <input type="submit" value="Save" />
        </p>
    </fieldset>

<% } %>

Dropdown list bound in MVC using Entity Framework

Dropdown list ASP.NET MVC

aspnet

C#