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HTML Controls->ASP.NET HtmlInputHidden Control

2007-03-26 15:22 441 查看

Definition and Usage

The HtmlInputHidden control is used to control an <input type="hidden"> element. In HTML, this element is used to create a hidden input field.

Properties and Events

PropertyDescription
AttributesReturns all attribute name and value pairs of the element
DisabledA Boolean value that indicates whether or not the control should be disabled. Default is false
idA unique id for the element
NameThe name of the element
runatSpecifies that the element is a server control. Must be set to "server"
StyleSets or returns the CSS properties that are applied to the control
TagNameReturns the element tag name
TypeThe type of the element
ValueThe value of the hidden field
VisibleA Boolean value that indicates whether or not the control should be visible
EventDescription
ServerChangeWhen the content of the element has changed

Examples

HTMLInputHidden

ASPX Source:

<script runat="server">
Sub submit(Source As Object, e As EventArgs)
hidden1.Value=string1.Value
p1.InnerHtml="Hidden value= " + hidden1.Value
End Sub
</script>

<html>
<body>

<form runat="server">
Enter some text: <input id="string1" type="text" size="25" runat="server" />
<input type="submit" value="Submit" OnServerClick="submit" runat="server" />
<input id="hidden1" type="hidden" runat="server" />
<p id="p1" runat="server" />
</form>

</body>
</html>
Output Result:

Enter some text:

IF you enter the text "shaohai" into the text box ,it will shows:

Enter some text:
Hidden value= shaohai

In this example we declare one HtmlInputHidden control, one HtmlInputText control, 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 sets the value of the hidden field equal to value of the input field and then displays the value of the hidden field in the p element.
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