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
Checked	A Boolean value that indicates whether the control is checked or not
id	A unique id for the control
runat	Specifies that the control is a server control. Must be set to "server"

Event	Description
ServerChange	Occurs when the state of the control has changed

Example 1

In the following example we declare one HtmlInputCheckBox control, one HtmlGeneric control, and one HtmlInputButton 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 two ways: if the checkbox is checked, the server sends the message "The checkbox is checked!" to the span control. If the checkbox is not checked, the server sends the message "The checkbox is not checked!" to the span control:

<script runat="server">
  Sub submit(Source As Object, e As EventArgs)
    if c1.Checked=True then
      s1.InnerHtml="The checkbox is checked!"
    else
      s1.InnerHtml="The checkbox is not checked!"
    end If
  End Sub
</script>

<html>
<body>
<form runat="server">
<input id="c1" type="checkbox" runat="server" /> 
<span id="s1" runat="server" />
<br /><br />
<input type="button" id="b1" value="Enter"
OnServerClick="submit" runat="server"/>
</form>
</body>
</html>

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