HTML Controls->ASP.NET HtmlForm Control
Definition and Usage
The HtmlForm control is used to control a <form> element. In HTML, the <form> element is used to create a form.
Note: All HTML server controls must be within the HtmlForm control!
Note: You can only have one HtmlForm control on a single page!
Properties
| Property | Description |
|---|---|
| Action | A URL that defines where to send the data when the form is submitted.
Note: This attribute is always set to the URL of the page itself! |
| 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 |
| EncType | The mime type used to encode the content of the form |
| id | A unique id for the control |
| InnerHtml | Sets or returns the content between the opening and closing tags of the HTML element. Special characters are not automatically converted to HTML entities |
| InnerText | Sets or returns all text between the opening and closing tags of the HTML element. Special characters are automatically converted to HTML entities |
| Method | How the form posts data to the server. Legal values are: "post" and "get". Default is "post" |
| Name | The name of the form |
| runat | Specifies that the control 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 |
| Target | The target window to load the URL |
| Visible | A Boolean value that indicates whether or not the control should be visible |
Examples
HTMLForm
ASPX Source:
| <script runat="server"> Sub submit(sender As Object, e as EventArgs) if name.value<>"" then p1.InnerHtml="Welcome " & name.value & "!" end if End Sub </script> <html> <body> <form runat="server"> Enter your name: <input id="name" type="text" size="30" runat="server" /> <br /><br /> <input type="submit" value="Submit" OnServerClick="submit" runat="server" /> <p id="p1" runat="server" /> </form> </body> </html> |
Output Result:
| Enter your name: |
IF you enter your name like"shaohai" and then click the button"submit", if will shows:
| Enter your name: Welcome shaohai! |
In this example we declare one HtmlInputText 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 writes a welcome message to the p element.
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