HTML Controls->ASP.NET HtmlTextArea Control
Definition and Usage
The HtmlTextArea control is used to control a <textarea> element. In HTML, the <textarea> element is used to create a text area.
Properties and Events
| Property | Description |
|---|---|
| Attributes | Returns all attribute name and value pairs of the element |
| Cols | The number of columns of the text area |
| Disabled | A Boolean value that indicates whether or not the control should be disabled. Default is false |
| 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 |
| Name | The unique name for the text area |
| OnServerChange | The name of the function to be executed when the contents of the textarea is changed |
| Rows | The number of visible rows of the text area |
| 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 |
| Value | The content of the textarea |
| Visible | A Boolean value that indicates whether or not the control should be visible |
Examples
HTMLTextarea
ASPX Source:
| <script runat="server"> Sub submit(sender As Object, e As EventArgs) p1.InnerHtml = "<b>You wrote:</b> " & textarea1.Value End Sub </script> <html> <body> <form runat="server"> Enter some text:<br /> <textarea id="textarea1" cols="35" rows="6" runat="server" /> <input type="submit" value="Submit" OnServerClick="submit" runat="server" /> <p id="p1" runat="server" /> </form> </body> </html> |
Output Result:
| Enter some text: |
IF you enter some text "shaohai" into the textarea, it will shows:
| Enter some text: You wrote: shaohai |
In this example we declare an HtmlTextarea control, an HtmlInputButton control, and an 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 sends the message "You wrote: " and the text the user wrote in the text area to the p element.
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