Remove null values from object array in C#

There are many ways to remove null objects from an Array in C#.
1) Using Linq
2) Using Froeach

Remember to include all namespaces required by each example below.

Removing Null Objects using Linq

In below example we are going to use lambda expression supported by Linq using Where syntax, and do a logical check on each element using IsNullOrEmpty() Method.

using System;  
using System.Linq;

public class Car{
    public string type { get; set; }

    public Car(string ntype){
        this.type = ntype;
    }
}

public class Example
{
    public static void Main()
    {
		string[] myColors = { "Red", "Blue", "", "Green", "", null, "pink" };
		myColors = myColors.Where(color => !string.IsNullOrEmpty(color)).ToArray();
		
		myColors.ToList().ForEach(i => Console.WriteLine(i.ToString()));
    }
}

Output

Red
Blue
Green
pink

Removing Null Objects using Foreach

In below example we are going to use foreach to loop through all elements and check whether an element is null using IsNullOrEmpty() method.

using System;  
using System.Collections.Generic;


public class Car{
    public string type { get; set; }

    public Car(string ntype){
        this.type = ntype;
    }
}

public class Example
{
    public static void Main()
    {
	string[] myColors = { "Red", "Blue", "", "Green", "", null, "pink" };
	List<string> tempListColors = new List<string>();
	foreach (string color in myColors)
	{
		if (!string.IsNullOrEmpty(color))
		tempListColors.Add(color);
	}
	myColors = tempListColors.ToArray();
    }
}

Conclusion

In this page (written and validated by A. Gawali) you learned about Remove null values from object array in C# . What's Next? If you are interested in completing C# tutorial, we encourage you simply to start here: C# Tutorial.

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