HTML Controls->ASP.NET HtmlInputCheckBox Control
Definition and Usage
The HtmlInputCheckBox control is used to control an <input type="checkbox"> element. In HTML, this element is used to create a checkbox.
Properties and Events
| 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 checked |
| Disabled | A Boolean value that indicates whether or not the control should be disabled. Default is false |
| id | A unique id for the control |
| Name | The name of the element |
| 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 |
| Event | Description |
|---|---|
| ServerChange | Occurs when the state of the control has changed |
Examples
HTMLInputCheckbox
| <script runat="server"> Sub submit(Source As Object, e As EventArgs) if red.Checked=True then p1.InnerHtml="You prefer red!" else p1.InnerHtml="You prefer blue!" end if red.checked=false blue.checked=false End Sub </script> <html> <body> <form runat="server"> What color do you prefer? <br /> <input id="red" type="checkbox" runat="server" /> Red <br /> <input id="blue" type="checkbox" runat="server" /> Blue <br /> <input type="button" value="Submit" OnServerClick="submit" runat="server"/> <p id="p1" runat="server" /> </form> </body> </html> |
Output Result:
| What color do you prefer? Red Blue |
IF you click the checkbox "red" ,it will shows :
| What color do you prefer? Red Blue You prefer red! |
In this example we declare two HtmlInputCheckBox controls, one HtmlInputButton control, and one HtmlGeneric 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 two ways: if the "red" checkbox is checked, the server sends the message "You prefer red!" to the p element. If the "blue" checkbox is checked, the server sends the message "You prefer blue!" to the p element.
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