Converts an array of any type to List
passing a mapping delegate Func that returns type T. If T is null, it will not be added to the collection. If the array is null, then a new instance of List() is returned.
Source
public static List<T> ToList<T>(this Array items, Func<object, T> mapFunction)
if (items == null || mapFunction == null)
return new List<T>();
List<T> coll = new List<T>();
for (int i = 0; i < items.Length; i++)
T val = mapFunction(items.GetValue(i));
if(val != null)
coll.Add(val);
return coll;
Example
--> Make another extension method
public static List<T> ToList<T>(this object[] items)
return items.ToList<T>(o => { return (T)o; });
Reduces this : http://extensionmethod.net/Details.aspx?ID=351
To this:
public static List<T> EnumToList<T>() where T : struct
return Enum.GetValues(typeof(T)).ToList<T>(enumVal => { return (T)Enum.Parse(typeof(T), enumVal.ToString()); });
--> Use in Linq
var myItems = from i in array.ToList<MyType>( o => { return (MyType)o; }) select i;
Author: James Levingston
Submitted on: 19 okt. 2010
Language: C#
Type: System.Array
Views: 11183
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