Tag: c#

We can use LINQ for this;

public class EnumModel
{
    public int Value { get; set; }
    public string Name { get; set; }
}

public enum MyEnum
{
    Name1=1,
    Name2=2,
    Name3=3
}

public class Test
{
        List<EnumModel> enums = ((MyEnum[])Enum.GetValues(typeof(MyEnum))).Select(c => new EnumModel() { Value = (int)c, Name = c.ToString() }).ToList();

        // A list of Names only, does away with the need of EnumModel 
        List<string> MyNames = ((MyEnum[])Enum.GetValues(typeof(MyEnum))).Select(c => c.ToString()).ToList();

        // A list of Values only, does away with the need of EnumModel 
        List<int> myValues = ((MyEnum[])Enum.GetValues(typeof(MyEnum))).Select(c => (int)c).ToList();

        // A dictionnary of <string,int>
        Dictionary<string,int> myDic = ((MyEnum[])Enum.GetValues(typeof(MyEnum))).ToDictionary(k => k.ToString(), v => (int)v);
}

Reference

https://stackoverflow.com/questions/1167361/how-do-i-convert-an-enum-to-a-list-in-c

View this class;

public class Product
{
   public string Name {get; set;}
   public decimal Price {get; set;}

   public Product(string name, decimal price)
   {
       Name = name;
       Price = price;
   }
}

This can be re-written as;

public class Product(string name, decimal price)
{
   public string Name {get; set;} = name;
   public decimal Price {get; set;} = price;
}

Seems we can save some lines with this new pattern.

To pass object from controller method to controller method use this extension methid;

public static class TempDataExtensions
{
    public static void Put<T>(this ITempDataDictionary tempData, string key, T value) where T : class
    {
        tempData[key] = JsonConvert.SerializeObject(value);
    }

    public static T Get<T>(this ITempDataDictionary tempData, string key) where T : class
    {
        object o;
        tempData.TryGetValue(key, out o);
        return o == null ? null : JsonConvert.DeserializeObject<T>((string)o);
    }
}

And, you can use them as follows:

Say objectA is of type ClassA. You can add this to the temp data dictionary using the above mentioned extension method like this:

TempData.Put("key", objectA);

And to retrieve it you can do this:

var value = TempData.Get<ClassA>("key") where value retrieved will be of type ClassA

To configure TempData in ASP.NET Core, Refer to this article

Reference

https://stackoverflow.com/questions/34638823/store-complex-object-in-tempdata