Category Archives: C#

Enum to Dictionary с локализацией

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Пример про локализацию
http://adamyan.blogspot.com/2010/02/aspnet-mvc-2-localization-complete.html

Пример с приведением enum к dictionary без лишних заморочек
http://stackoverflow.com/questions/5583717/enum-to-dictionary-c-sharp

var dict = Enum.GetValues(typeof(typFoo))
               .Cast()
               .ToDictionary(t => (int)t, t => t.ToString() );

Пример с generic-методом для enum
http://stackoverflow.com/questions/79126/create-generic-method-constraining-t-to-an-enum

public T GetEnumFromString(string value) where T : struct, IConvertible
{
   if (!typeof(T).IsEnum) 
   {
      throw new ArgumentException("T must be an enumerated type");
   }

   //...
}

public abstract class EnumClassUtils
where TClass : class
{

    public static TEnum Parse(string value)
    where TEnum : struct, TClass
    {
        return (TEnum) Enum.Parse(typeof(TEnum), value);
    }

}

public class EnumUtils : EnumClassUtils
{
}

Наконец, собранное воедино — generic-метод, преобразующий enum к словарю на нужном языке. Может быть, надо доработать.

public static Dictionary TranslateEnum() where TEnum : struct, IConvertible
        {
            if (!typeof(TEnum).IsEnum)
            {
                throw new ArgumentException("TEnum must be an enumerated type");
            }

            var lang = typeof(MyLangStrings);

            var dict = Enum.GetValues(typeof(TEnum))
               .Cast()
               .ToDictionary(t => (int)Enum.Parse(typeof(TEnum), t.ToString()), t =>
               {
                   var p = lang.GetProperty(t.ToString());
                   return p.GetValue(p.DeclaringType, null).ToString();
               });
            return dict;
        }

Работа с параметрами запроса

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Интересный пример
http://stackoverflow.com/questions/5818065/how-to-pass-request-querystring-to-url-action

public static RouteValueDictionary ToRouteValues(this NameValueCollection col, Object obj)
{
    var values = new RouteValueDictionary(obj);
    if (col != null)
    {
        foreach (string key in col)
        {
            //values passed in object override those already in collection
            if (!values.ContainsKey(key)) values[key] = col[key];
        }
    }
    return values;
}
Then you can use it like so:

Url.Action("action", "controller", Request.QueryString.ToRouteValues(new{ id=0 }));

Копирование объектов

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https://msdn.microsoft.com/en-us/library/system.object.memberwiseclone(v=vs.110).aspx

public class Person 
{
    public int Age;
    public string Name;
    public IdInfo IdInfo;

    public Person ShallowCopy()
    {
       return (Person) this.MemberwiseClone();
    }

    public Person DeepCopy()
    {
       Person other = (Person) this.MemberwiseClone();
       other.IdInfo = new IdInfo(IdInfo.IdNumber);
       other.Name = String.Copy(Name);
       return other;
    }
}