Simple Count based on a Condition using LINQ

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Here’ a simple example demonstrating how to perform a count on a List<> based on a condition

C#

class Program
{
    static void Main(string[] args)
    {
        List<Students> students = new List<Students>();
        students.Add(new Students() { StudentId = 1, Marks = 8.0f });
        students.Add(new Students() { StudentId = 2, Marks = 5.0f });
        students.Add(new Students() { StudentId = 3, Marks = 7.0f });
        students.Add(new Students() { StudentId = 4, Marks = 9.5f });
        students.Add(new Students() { StudentId = 1, Marks = 9.0f });

        var topStudCount = students.Count(r => r.Marks >= 9.0f);
        Console.WriteLine("Students with Marks >=9 are {0}", topStudCount);
        Console.ReadLine();
    }
}

class Students
{
    public int StudentId { get; set; }
    public float Marks { get; set; }
}

VB.NET

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OUTPUT

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About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.