HTML Controls->ASP.NET HtmlInputHidden Control
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
| Property | Description |
|---|---|
| Attributes | Returns all attribute name and value pairs of the element |
| 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 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 hidden field |
| Visible | A Boolean value that indicates whether or not the control should be visible |
| Event | Description |
|---|---|
| ServerChange | When 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> |
| 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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