where clause : where « LINQ « C# / C Sharp

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C# / C Sharp » LINQ » whereScreenshots 
where clause
 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using System.Reflection;

class Person {
    int _id;
    int _idRole;
    string _lastName;
    string _firstName;

    public int ID {
        get return _id; }
        set _id = value; }
    }

    public int IDRole {
        get return _idRole; }
        set _idRole = value; }
    }

    public string LastName {
        get return _lastName; }
        set _lastName = value; }
    }

    public string FirstName {
        get return _firstName; }
        set _firstName = value; }
    }
}
class Program {
    static void Main(string[] args) {
        List<Person> people = new List<Person> {
              new Person  ID = 1, IDRole = 1, LastName = "A", FirstName = "B"},
              new Person  ID = 2, IDRole = 2, LastName = "G", FirstName = "T"},
              new Person  ID = 3, IDRole = 2, LastName = "G", FirstName = "M"},
              new Person  ID = 4, IDRole = 3, LastName = "C", FirstName = "G"}
            };

        var query = people.Where((p, index=> p.IDRole == index);
    }
}

 
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4.Query Using the Query Expression Syntax
5.Query string value by String.StartsWith
6.Where clause with string method and return IEnumerable object
7.Query with an Exception
8.Use string method in where clause
9.Use where to filer object list
10.Use && in where clause
11.Filtered: prints the name of each element of an integer array that is less than 5
12.prints strings where each element has the second letter 'i'.
13.Two where clauses
14.use where clause in a while loop
15.Assign the loop variable to another variable declared inside the statement block
16.Filter string by its length
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