RadioButton Control

This Control is used to provide selection of only one option from the given group of options

Properties with Radio Button Control:

1. AutoPostBack(options[True/False(Default)])                                                                     
2.  Checked(options:[True/False(Default)])                                         
3. GroupName

1)CheckedProperty:

• This property stores true when Radio Button is activated
• Stores false when Radio Button is deactivated or deselected

2)AutoPostBack:

• When set to true request of the page will be submitted as PostBack to the WebServer, when default Event is fired
• False: page request will not be submitted or post back to web server, when default Event is fired

3)GroupName:

• Used to give common or same name for the group of Radio Button so that user can be allowed to select any one from the group

Default Event of RadioButton:

• CheckedChanged: Is the default Event of Radio Button Control, this Event will be fired when checked properties changes from true to false (or) false to true

Example with RadiButton Control:--
   
Create a New WebPage ,Design the web page 

• Set the following properties
• Set Group name as  BColor  & AutoPostPack as true for all RadioButtons
• Type in Radio Buttons text as Red,Green
• Set ID’s for Radio Buttons as for Red optRed,for Green optGreen, for white optwhite
• Set label text as Enter any data & ID as lblsample
• Set Text Box1 ID as txtSample
• Incluse NameSpace as using System.Drawing;
• Goto Source and write the following codeCheckedCahnged Events of the RadioButtons.

Source and write the following codeCheckedCahnged Events of the RadioButtons.

protected void optRed_CheckedChanged(object sender, EventArgs e) {         txtSample.BackColor = Color.Red; } protected void optGreen_CheckedChanged(object sender, EventArgs e) {         txtSample.BackColor = Color.Green; }

Run the WebPage & Check