ASP.NET RegularExpressionValidator Control
 Complete Validation Control Reference
Definition and Usage
The RegularExpressionValidator control is used to ensure that an input value matches a specified pattern.
Note: Both server- and client-side validation are performed unless the browser
does not support client-side validation or the EnableClientScript property is
set to false.
Note: The validation will not fail if the input control is empty. Use
the RequiredFieldValidator control to make the field required.
Properties
| Property |
Description |
| BackColor |
The background color of the RegularExpressionValidator control |
| ControlToValidate |
The id of the control to validate |
| Display |
The display behavior for the validation control. Legal
values are:
- None (the control is not displayed. Used to
show the error message only in the ValidationSummary control)
- Static (the control displays an error message if validation
fails. Space is reserved on the page for the message even if
the input passes validation.
- Dynamic (the control displays an error message if
validation fails. Space is not reserved on
the page for the message if the input passes validation
|
| EnableClientScript |
A Boolean value that specifies whether client-side
validation is enabled or not |
| Enabled |
A Boolean value that specifies whether the validation
control is enabled or not |
| ErrorMessage |
The text to display in the ValidationSummary control when
validation fails. Note: This text will also be displayed in the
validation control if the Text property is not set |
| ForeColor |
The foreground color of the control |
| id |
A unique id for the control |
| IsValid |
A Boolean value that indicates whether the control
specified by ControlToValidate is determined to be valid |
| runat |
Specifies that the control is a server control. Must
be set to "server" |
| BackColor |
The background color of the RegularExpressionValidator control |
| Text |
The message to display when validation fails |
| ValidationExpression |
Specifies the expression used to validate input control. The expression
validation syntax is different on the client than on the server. JScript is used
on the client. On the server, the language you have specified is used
|
Examples
RegularExpressionValidator
In this example we declare one TextBox control, one Button control, one Label
control, and one RegularExpressionValidator control in an .aspx
file. The submit() function checks if the page is valid.
If it is valid, it returns "The page is valid!" in the Label control. If it is not valid, it
returns "The page is not valid!" in the Label control. If validation
fails, the text "The zip code must be 5 numeric digits!" will be
displayed in the RegularExpressionValidator control.
Complete Validation Control Reference
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