CheckBox in C#
The CheckBox control is the part of windows form which is used to take input from the user. Or in other words, CheckBox control allows us to select single or multiple elements from the given list or it can provide us options like yes or no, true or false, etc. It can be displayed as an image or text or both. The CheckBox is a class and defined under System.Windows.Forms namespace. In Windows form, you can create CheckBox in two different ways:
1. Design-Time: It is the simplest way to create a CheckBox using the following steps:
- Step 1: Create a windows form as shown in the below image:
Visual Studio -> File -> New -> Project -> WindowsFormApp
- Step 2: Drag the CheckBox control from the ToolBox and drop it on the windows form. You can place CheckBox anywhere on the windows form according to your need.
- Step 3: After drag and drop you will go to the properties of the CheckBox control to modify the CheckBox design according to your requirement.
2. Run-Time: It is a little bit trickier than the above method. In this method, you can create your own checkbox programmatically using the CheckBox class.
- Step 1: Create a checkbox using the CheckBox() constructor provided by the CheckBox class.
// Creating checkbox CheckBox Mycheckbox = new CheckBox();
- Step 2: After creating CheckBox, set the properties of the CheckBox provided by the CheckBox class.
// Set height of the checkbox Mycheckbox.Height = 50; // Set width of the checkbox Mycheckbox.Width = 100; // Set location of the checkbox Mycheckbox.Location = new Point(229, 136); // Set text in the checkbox Mycheckbox.Text = "Married"; // Set font of the checkbox Mycheckbox.Font = new Font("Bradley Hand ITC", 12);
- Step 3: And last add this checkbox control to form using Add() method.
// Add this checkbox to form this.Controls.Add(Mycheckbox);
Important Properties of CheckBox
|Appearance||This property is used to gets or sets the value that indicates the appearance of a CheckBox control.|
|AutoCheck||This property is used to set a value which shows whether the Checked or CheckState values and the CheckBox appearance are automatically changed when you click the CheckBox.|
|AutoEllipsis||This property is used to get or set a value which determine whether the ellipsis character (…) appears at the right edge of the control, denoting that the control text extends beyond the specified length of the control.|
|AutoSize||This property is used to get or set a value that determines whether the control resizes based on its contents.|
|BackColor||This property is used to get or set the background color of the control.|
|BackgroundImage||This property is used to get or set the background image displayed in the control.|
|CheckState||This property is used to get or set the state of the CheckBox.|
|CheckAlign||This property is used to get or set the horizontal and vertical alignment of the check mark on a CheckBox control.|
|Checked||This property is used to get or set a value which determine whether the CheckBox is in the checked state.|
|Events||This property is used to get the list of event handlers that are attached to this Component.|
|Font||This property is used to get or set the font of the text displayed by the control.|
|ForeColor||This property is used to get or set the foreground color of the control.|
|Image||This property is used to get or set the image that is displayed on a checkbox control.|
|Location||This property is used to get or set the coordinates of the upper-left corner of the CheckBox control relative to the upper-left corner of its form.|
|Margin||This property is used to get or set the space between controls.|
|Name||This property is used to get or set the name of the control.|
|Padding||This property is used to get or set padding within the control.|
|Text||This property is used to get or set the text associated with this control.|
|TextAlign||This property is used to get or set the alignment of the text on the CheckBox control. |
|Visible||This property is used to get or set a value which determine whether the control and all its child controls are displayed.|
Important Events on CheckBox
|CheckedChanged||This event occur when the value of the Checked property changes.|
|CheckStateChanged||This event occur when the value of the CheckState property changes.|
|Click||This event occur when the control is clicked.|
|DoubleClick||This event occur when the user double-clicks the CheckBox control.|
|Leave||This event occur when the input focus leaves the control.|
|MouseClick||This event occur when the control is clicked by the mouse.|
|MouseDoubleClick||This event occur when the user double-clicks the CheckBox control.|
|MouseHover||This event occur when the mouse pointer rests on the control.|