How to check if a Object has an Attribute in Python

February 21, 2015

To check if a Object has an Attribute in Python you can use the snippet below.

Sample Python

if hasattr(myObject, 'myAttributeName'): # myObject.myAttributeName exists.

How to Map to Protected Property using AutoMapper in C# and VB.NET

Administrator

February 12, 2015

4 Comments

To map protected Properties using AutoMapper in C# and VB.NET you can use the following snippet.

Samples

Samples C#

using System;
using AutoMapper;

namespace de.Fesslersoft.AutoMapperMapToProtectedProperties
{
    class Program
    {
        static void Main(string[] args)
        {
            Product prod = new Product {Number = "Test", Price = 100, Quantity = 50};
            Mapper.Initialize(cfg =>
            {
                //without this line the ItemQuantity will be 10 and the Price 5
                //with this line  the ItemQuantity will be 50 and the Price 100
                cfg.ShouldMapProperty = p => p.GetGetMethod(true).IsPrivate || p.GetGetMethod(true).IsHideBySig;
                Mapper.CreateMap<Product, Item>();
            });
            Item item = Mapper.Map<Product, Item>(prod);
            Console.WriteLine("ItemNumber: {0}; ItemQuantity: {1}, ItemPrice: {2}", item.Number, item.GetQuantity(), item.GetPrice());
            Console.Read();
        }

        public class Product
        {
            public string Number { get; set; }
            public short Quantity { get; set; }
            public decimal Price { get; set; }
        }

        public class Item
        {
            public Item()
            {
                Quantity = 10;
                Price = 5;
            }

            public string Number { get; set; }

            protected short Quantity { get; set; }
            private decimal Price { get; }

            public decimal GetPrice()
            {
                return Price;
            }

            public short GetQuantity()
            {
                return Quantity;
            }
        }
    }
}

using System;

using AutoMapper;

namespace de.Fesslersoft.AutoMapperMapToProtectedProperties

{

class Program

{

static void Main(string[] args)

{

Product prod = new Product {Number = "Test", Price = 100, Quantity = 50};

Mapper.Initialize(cfg =>

{

//without this line the ItemQuantity will be 10 and the Price 5

//with this line the ItemQuantity will be 50 and the Price 100

cfg.ShouldMapProperty = p => p.GetGetMethod(true).IsPrivate || p.GetGetMethod(true).IsHideBySig;

Mapper.CreateMap<Product, Item>();

});

Item item = Mapper.Map<Product, Item>(prod);

Console.WriteLine("ItemNumber: {0}; ItemQuantity: {1}, ItemPrice: {2}", item.Number, item.GetQuantity(), item.GetPrice());

Console.Read();

}

public class Product

{

public string Number { get; set; }

public short Quantity { get; set; }

public decimal Price { get; set; }

}

public class Item

{

public Item()

{

Quantity = 10;

Price = 5;

}

public string Number { get; set; }

protected short Quantity { get; set; }

private decimal Price { get; }

public decimal GetPrice()

{

return Price;

}

public short GetQuantity()

{

return Quantity;

}

Samples VB.NET

🙁 missing, feel free to provide a VB.NET sample

Another approach would be to create a method in the destination object to do the mapping.

Samples

Sample C#

Mapper.CreateMap<Source, Destination>().AfterMap((src, dest) => dest.MethodToSetProtectedProperty(Source.SourceProperty));

1	Mapper.CreateMap<Source, Destination>().AfterMap((src, dest) => dest.MethodToSetProtectedProperty(Source.SourceProperty));

Sample VB.NET

Mapper.CreateMap(Of Source, Destination)().AfterMap(Function(src, dest) dest.MethodToSetProtectedProperty(Source.SourceProperty))

1	Mapper.CreateMap(Of Source, Destination)().AfterMap(Function(src, dest) dest.MethodToSetProtectedProperty(Source.SourceProperty))

Compatibility:

.NET 2.0

.NET 3.0

.NET 3.5

.NET 4.0

.NET 4.5

.NET 4.6

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

How to ignore all unmapped properties using Automapper in C# and VB.NET

Administrator

February 11, 2015

3 Comments

To ignore all unmapped properties using Automapper in C# and VB.NET you can use the following snippet.

Sample C#

var testClassA = new TestclassA() {Name = "Testname", Title = "Testtitle"};
Mapper.CreateMap<TestclassA, TestclassB>().ForAllMembers(opt => opt.Ignore());
Mapper.CreateMap<TestclassA, TestclassB>().ForMember(source => source.Title, destination => destination.MapFrom(x => x.Title));

var testClassB = Mapper.Map<TestclassA, TestclassB>(testClassA);
Console.WriteLine(testClassB.Title); //prints out "Testtitle"
Console.WriteLine(testClassB.Name); //print nothing  (NULL)

Sample VB.NET

Dim testClassA = New TestclassA() With { _
	Key .Name = "Testname", _
	Key .Title = "Testtitle" _
}
Mapper.CreateMap(Of TestclassA, TestclassB)().ForAllMembers(Function(opt) opt.Ignore())
Mapper.CreateMap(Of TestclassA, TestclassB)().ForMember(Function(source) source.Title, Function(destination) destination.MapFrom(Function(x) x.Title))

Dim testClassB = Mapper.Map(Of TestclassA, TestclassB)(testClassA)
Console.WriteLine(testClassB.Title)
'prints out "Testtitle"
Console.WriteLine(testClassB.Name)
'print nothing  (NULL)

How to make a List or Collection of class read-only in C# and VB.NET

Administrator

June 23, 2014

1 Comment

To make a List or Collection of class read-only in C# and VB.NET you can use the following snippet.

Sample C#

public class Test
{
	private readonly List<int> _testList = new List<int>();

	public IList<int> TestList 
	{
		get { return _testList.AsReadOnly(); }
	}

	public Test()
	{
		_testList.Add(0);
		_testList.Add(1);
		_testList.Add(2);
		_testList.Add(3);
		_testList.Add(4);
		_testList.Add(5);
	}
}

Sample VB.NET

Public Class Test
	Private ReadOnly _testList As New List(Of Integer)()

	Public ReadOnly Property TestList() As IList(Of Integer)
		Get
			Return _testList.AsReadOnly()
		End Get
	End Property

	Public Sub New()
		_testList.Add(0)
		_testList.Add(1)
		_testList.Add(2)
		_testList.Add(3)
		_testList.Add(4)
		_testList.Add(5)
	End Sub
End Class

Setting a default value for auto implemented properties

Administrator

May 27, 2014

0 Comments

normally you can set a default value for your properties by giving the private property a value.

private string description = "none";
public string Description
{
    get 
    {
        return description;
    }
    set
    {
        description = value;
    }
}

but the auto implemented properties which were introduced with C# 3.0 the syntax does look like this

public string Description { get; set; }

The only way to give auto implemented properties a default value is to set the value in constructor.

Sample:

this will give you a default value for your auto-implemented property, without breaking object initializer functionallity.

more informations in the MSDN Auto-Implemented Properties

CODE SNIPPETS

CODESNIPPETS FOR .NET, SQL, JAVASCRIPT, JQUERY and more

properties

How to check if a Object has an Attribute in Python

Sample Python

How to Map to Protected Property using AutoMapper in C# and VB.NET

Samples

Samples C#

Samples VB.NET

Samples

Sample C#

Sample VB.NET

How to ignore all unmapped properties using Automapper in C# and VB.NET

Sample C#

Sample VB.NET

Setting a default value for auto implemented properties