Checkbox in C#

Introduction to Checkbox in C#

CheckBox is a control that allows the user to make single or multiple selections from a list of options. In C#, CheckBox class from System.Windows.Forms namespace is used to work with checkbox control. It is a part of Windows Forms and is used to take input from the user. It can also be used to select from the options such as true/false or yes/no.

A user can click on a checkbox to select the associated item and can click on it again to deselect the item. It can be used along with an image or text or both.

Types of Checkbox

We can create checkbox in two different ways:

1. Using Form Designer at design time.
2. Using CheckBox class in code at run time.

We can create checkBox at design time by dragging a checkbox control from the ToolBox and then dropping it on the windows form. Then, we can go to the properties of the checkbox control and can modify it.

To create a checkbox at runtime, we need to use the CheckBox class.

Syntax: 

CheckBox check_box = new CheckBox();

After this, we can set the properties of the checkbox according to our requirements.

//setting location of checkbox
check_box.Location = new Point(300,150);
//setting height and width for checkbox
check_box.Height = 50;
check_box.Width = 50;
//setting text for checkbox
check_box.Text = “Yes”;

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At last, we need to add this checkbox to the Windows Form by using:

this.Controls.Add(check_box);

CheckBox Properties

C# provides many properties for the checkbox.

CheckBox Events

Let us see some important events for the CheckBox provided by C#:

Implementation of CheckBox in C#

Below is an example of how to implement the checkbox in c #

Example:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp1
{
public partial class CheckBoxDemo : Form
{
public CheckBoxDemo()
{
InitializeComponent();
}
private void CheckBoxDemo_Load(object sender, EventArgs e)
{
//Creating and setting properties of Label
Label label = new Label();
label.Text = "Select your technical skills";
label.AutoSize = true;
label.Location = new Point(192, 77);
label.Font = new Font("Microsoft Sans Serif", 11);
//Adding label to form
this.Controls.Add(label);
//Creating and setting properties of CheckBox
CheckBox checkbox1 = new CheckBox();
checkbox1.Location = new Point(195, 111);
checkbox1.Text = "C";
//Adding checkbox to form
this.Controls.Add(checkbox1);
CheckBox checkbox2 = new CheckBox();
checkbox2.Location = new Point(195, 156);
checkbox2.Text = "C++";
this.Controls.Add(checkbox2);
CheckBox checkbox3 = new CheckBox();
checkbox3.Location = new Point(195, 195);
checkbox3.Text = "C#";
this.Controls.Add(checkbox3);
CheckBox checkbox4 = new CheckBox();
checkbox4.Location = new Point(195, 235);
checkbox4.Text = "JAVA";
this.Controls.Add(checkbox4);
CheckBox checkbox5 = new CheckBox();
checkbox5.Location = new Point(195, 275);
checkbox5.Text = "HTML";
this.Controls.Add(checkbox5);
}
}
}

Output:

Conclusion – Checkbox in C#

A checkbox in C# can also have an indeterminate state. This can be achieved by setting the CheckState property to ‘Indeterminate. It is a state between ‘Yes’ and ‘No’ in which the checkbox will neither be checked nor unchecked.

This has been a guide to Checkbox in C#. Here we discuss syntax, CheckBox properties, and CheckBox Events along with its implementation. You may also have a look at the following articles to learn more –

1. what is Continue in C#
2. C# Data Types
3. TextWriter in C#
4. C# Stack