@Html.EnumDropDownListFor in MVC

For MVC v5.1 use Html.EnumDropDownListFor

        @Html.DropDownList("MyType", 
           Html.GetEnumSelectList(typeof(MyType)) , 
           "Select My Type", 
           new { @class = "form-control" })
    

---

For MVC v5 use EnumHelper

        @Html.DropDownList("MyType", 
           EnumHelper.GetSelectList(typeof(MyType)) , 
           "Select My Type", 
           new { @class = "form-control" })
    

---

For MVC >5 and lower

I rolled Rune's answer into an extension method:

        namespace MyApp.Common
        {
            public static class MyExtensions{
                public static SelectList ToSelectList(this TEnum enumObj)
                    where TEnum : struct, IComparable, IFormattable, IConvertible
                {
                    var values = from TEnum e in Enum.GetValues(typeof(TEnum))
                        select new { Id = e, Name = e.ToString() };
                    return new SelectList(values, "Id", "Name", enumObj);
                }
            }
        }
    

This allows you to write:

     ViewData["taskStatus"] = task.Status.ToSelectList();
    

by

using MyApp.Common




Alternatively:

Create a custom helper class and use Html.EnumDropDownListFor for all lower version MVC < 5.1 (i.e. 3.x, 4.x, 5.0). Here is the class code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Web.Mvc;
using System.Web.Mvc.Html;
/// 

/// Class ENUM Helper
/// 
public static class EnumHelper
{
    /// 

    /// The single empty item
    /// 
    private static readonly SelectListItem[] SingleEmptyItem = new[] { new SelectListItem { Text = string.Empty, Value = string.Empty } };
    /// 

    /// Gets the ENUM description.
    /// 
    /// The type of the ENUM.
    /// The value.
    /// ENUM Description
    public static string GetEnumDescription(TEnum value)
    {
        FieldInfo fi = value.GetType().GetField(value.ToString());
        DescriptionAttribute[] attributes = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
        if ((attributes != null) && (attributes.Length > 0))
        {
            return attributes[0].Description;
        }
        else
        {
            return value.ToString();
        }
    }
    /// 

    /// ENUMS the drop down list for.
    /// 
    /// The type of the model.
    /// The type of the ENUM.
    /// The HTML helper.
    /// The expression.
    /// MVC Html String
    public static MvcHtmlString EnumDropDownListFor(this HtmlHelper htmlHelper, Expression> expression)
    {
        return EnumDropDownListFor(htmlHelper, expression, null);
    }
    /// 

    /// ENUMS the drop down list for.
    /// 
    /// The type of the model.
    /// The type of the ENUM.
    /// The HTML helper.
    /// The expression.
    /// The HTML attributes.
    /// MVC Html String
    public static MvcHtmlString EnumDropDownListFor(this HtmlHelper htmlHelper, Expression> expression, object htmlAttributes)
    {
        ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
        Type enumType = GetNonNullableModelType(metadata);
        IEnumerable values = Enum.GetValues(enumType).Cast();
        IEnumerable items = from value in values
                                            select new SelectListItem
                                            {
                                                Text = GetEnumDescription(value),
                                                Value = value.ToString(),
                                                Selected = value.Equals(metadata.Model)
                                            };
        // If the enum is nullable, add an 'empty' item to the collection
        if (metadata.IsNullableValueType)
        {
            items = SingleEmptyItem.Concat(items);
        }
        return htmlHelper.DropDownListFor(expression, items, htmlAttributes);
    }
    /// 

    /// Gets the type of the non null-able model.
    /// 
    /// The model metadata.
    /// real Model Type
    private static Type GetNonNullableModelType(ModelMetadata modelMetadata)
    {
        Type realModelType = modelMetadata.ModelType;
        Type underlyingType = Nullable.GetUnderlyingType(realModelType);
        if (underlyingType != null)
        {
            realModelType = underlyingType;
        }
        return realModelType;
    }
}

Usage:

   @Html.EnumDropDownListFor(model => model.EnumProperty, "Select Enum", new { @class = "form-control", type = "text"})

Scaffold your ASP.NET MVC 3 project with the MvcScaffolding package

This post is part of a series about the MvcScaffolding NuGet package:

1. This post: Scaffold your ASP.NET MVC 3 project with the MvcScaffolding package
2. Standard usage: Typical use cases and options
3. One-to-Many Relationships
4. Scaffolding Actions and Unit Tests
5. Overriding the T4 templates
6. Creating custom scaffolders
7. Scaffolding custom collections of files

Among many other improvements with ASP.NET MVC 3, we’re keen to make it easier to pick up and start using productively if you’re entirely new to the framework, and to automate common development tasks if you’re experienced and already know what you’re doing.

Read more here...

To scaffold multiple controllers in one command?

PM> $models="Products","Reviews"

then to do it automa<T>ically,

PM> foreach($m in $models) { Scaffold Controller $m }

Reference: http://stackoverflow.com/a/8955857

The Repository Pattern with EF Code First & Dependency Injection in ASP.NET MVC3

Introduction

These days, I started using EF code first and thought about how could I take advantage from it for my recent project. My project is based on MVC3 and there are some challenges to continue updating this project. At that time, I must finish my job in a very short deadline so fast so good I just define some data access interfaces and implemented them with EF4.

There are some things in my project troubling me:

• I have used the EF entities in my controllers anywhere that there is a connection translation error throwing infrequently.
• Modules coupling degree becoming closed.
• Manage services and contexts life cycle are difficult.

Obviously, it needs to refactor my project with a new architecture designing.

More to read here.