Reflection C#

C# > System > Reflection

Reflection provides objects that encapsulate assemblies, modules and types.
With reflection you can read metadata for finding assemblies, modules and types information at runtime. 
These objects also can be used to manipulate instances of loaded types.

• Asembly class

Func C# Example

C# > System > Func

Func is a parameterized type. 

• accepts any number and kinds of input parameters
• one type of the return value T
• stores anonymous methods 

Example

1. Func<T, TResult>

Func<int, int> power = p => p * p;

int[] numbers = { 1, 2, 3 };

IEnumerable<int> powers = numbers.Select(power);

foreach (int p in powers)

     Console.WriteLine(p);

Dynamic Language Runtime C#

C# > System > Dynamic

Dynamic Language Runtime.

• DynamicObject

Dynamic Object Runtime C# Example

C# > Sytem.Dynamic > DynamicObject

DynamicObject specifies dynamic behavior at run time.






Example:

Create dynamic object in runtime.

Dynamically Add C# Properties at Runtime.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Dynamic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace WindowsFormsApplication26

{

    public class MyDynamicObject : DynamicObject

    {

        Dictionary<string, object> dictionary = new Dictionary<string, object>();

        public object this[string propertyName]

        {

            get

            {

                return dictionary[propertyName];

            }

            set

            {

                dictionary[propertyName] = value;

            }

        }

        public override bool TryGetMember(

            GetMemberBinder binder, out object result)

        {

            return dictionary.TryGetValue(binder.Name, out result);

        }

        public override bool TrySetMember(

            SetMemberBinder binder, object value)

        {

            dictionary[binder.Name] = value;

            return true;

        }

      

        public override bool TrySetIndex(

            SetIndexBinder binder, object[] indexes, object value)

        {

            int index = (int)indexes[0];

            if (dictionary.ContainsKey("Property" + index))

                dictionary["Property" + index] = value;

            else

                dictionary.Add("Property" + index, value);

            return true;

        }

    }

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            dynamic obj = new MyDynamicObject();

            obj["column1"] = 1;

            obj.column2 = 2;

            var v1 = obj["column1"];

            var v2 = obj.column2;

        }

    }

}

Telerik RadTimePicker Get Selected Time

Telerik > RadTimePicker > Get Time

Get selected time from RadTimePicker c#.

DateTime dt = radTimePicker.SelectedDate.Value;
string time = dt.ToString("HH:mm:ss");

Call one constructor from another c#

C > Keywords > This > Call one constructor from another 

      public Constructor1()

      {

      }

      public Constructor2(string writer) : this()

      {

      }

Lambda Expressions in a Query C#

C# > Operators > Lambda > Query

We use  lambda expressions in method calls not directly in query syntax.

Simple Example

     int[] wages = { 1000, 1200, 1500, 1800, 2000, 2500 };
    int highWagesCount = wages.Where(n => n >= 2000).Count();