HTML Controls->ASP.NET HtmlInputRadioButton Control
Definition and Usage
The HtmlInputRadioButton control is used to control an <input type="radio"> element. In HTML, this element is used to create a radiobutton.
Properties
| Property | Description |
|---|---|
| Attributes | Returns all attribute name and value pairs of the element |
| Checked | A Boolean value that specifies whether or not the element is to be selected |
| Disabled | A Boolean value that indicates whether or not the control should be disabled. Default is false |
| id | A unique id for the element |
| Name | The name of the radio button group |
| runat | Specifies that the element is a server control. Must be set to "server" |
| Style | Sets or returns the CSS properties that are applied to the control |
| TagName | Returns the element tag name |
| Type | The type of the element |
| Value | The value of the element |
| Visible | A Boolean value that indicates whether or not the control should be visible |
Examples
HTMLInputRadiobutton
ASPX Source:
| <script runat="server"> Sub submit(Source As Object, e As EventArgs) if r1.Checked=True then p1.InnerHtml="Your favorite color is red" else if r2.Checked=True then p1.InnerHtml="Your favorite color is green" else if r3.Checked=True then p1.InnerHtml="Your favorite color is blue" end if end if end if End Sub </script> <html> <body> <form runat="server"> <p>Select your favorite color: <br /> <input id="r1" name="col" type="radio" runat="server">Red</input> <br /> <input id="r2" name="col" type="radio" runat="server">Green</input> <br /> <input id="r3" name="col" type="radio" runat="server">Blue</input> <br /> <input type="button" value="Submit" OnServerClick="submit" runat="server"/> <p id="p1" runat="server" /> </form> </body> </html> |
Output Result:
|
Select your favorite color: |
IF you click the radiobox "Green", it will shows :
|
Select your favorite color: Your favorite color is green |
In this example we declare three HtmlInputRadioButton controls, one HtmlInputButton control, and one HtmlGeneric control in an .aspx file (remember to embed the controls inside an HtmlForm control). When the submit button is triggered, the submit subroutine is executed. The submit subroutine may respond in three ways: if the radiobutton with id="r1" is selected, the server sends the message "Your favorite color is red" to the p element. If the radiobutton with id="r2" is selected, the server sends the message "Your favorite color is green" to the p element. If the radiobutton with id="r3" is selected, the server sends the message "Your favorite color is blue" to the p element.
浙公网安备 33010602011771号