Thursday, June 19, 2014

C# - Enum Fully Qualified Name with space and Display

In Enum we can not have fully qualified name with spaces. To achieve that we can add the description attribute as follows

     ....
    using System.ComponentModel;
   ....

    public enum Employee
    {
        [Description("Balajiprasad Ramesh")]
        BalajiprasadRamesh = 1,
      
        [Description("Combined Name")]
        CombinedName = 2

    }



To display Enum description we can use the following code

private static string GetEnumDescription(object 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();
        }

Tuesday, June 17, 2014

MVC Razor - Convert Enum to List of SelectListItem

To Bind Enum values into Dropdown of MVC Razor, we need to convert them into list of SelectListitem.

Following class helps to convert Enum to List Of SelectListItem

Class:

public static class EnumToSelectedListItem
    {

        public static List<SelectListItem> ToSelectedListItem<T>()
        {
            List<SelectListItem> dropdown = Enum.GetValues(typeof(T)).Cast<T>().
                Select(v => new SelectListItem { Selected = false, Text = v.ToString(), Value = Convert.ToInt32(v).ToString() }).ToList();
            return dropdown;
        }


    }

SelectListItem Class Datastructure  (This class available in MVC)

// Summary:
    //     Represents the selected item in an instance of the System.Web.Mvc.SelectList
    //     class.
    public class SelectListItem
    {
        // Summary:
        //     Initializes a new instance of the System.Web.Mvc.SelectListItem class.
        public SelectListItem();

        // Summary:
        //     Gets or sets a value that indicates whether this System.Web.Mvc.SelectListItem
        //     is selected.
        //
        // Returns:
        //     true if the item is selected; otherwise, false.
        public bool Selected { get; set; }
        //
        // Summary:
        //     Gets or sets the text of the selected item.
        //
        // Returns:
        //     The text.
        public string Text { get; set; }
        //
        // Summary:
        //     Gets or sets the value of the selected item.
        //
        // Returns:
        //     The value.
        public string Value { get; set; }
    }


Consume:

  public List<SelectListItem> PersonEnumList
        {
            get
            {
                return EnumToSelectedListItem.ToSelectedListItem<PersonEnum>();
            }
        }