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The server side validation routine must be called from the control's Server Validate event handler. The basic syntax for the control is as given: The Validation Summary control does not perform any validation but shows a summary of all errors in the page.
The server side validation routine should be written in any . The summary displays the values of the Error Message property of all validation controls that failed validation.
The control also trims whitespace in order to check for the required field entry.
The property can be set to the same initial value as the drop-down list, Select a State.
The validation control classes are inherited from the Base Validator class hence they inherit its properties and methods.
Therefore, it would help to take a look at the properties and the methods of this base class, which are common for all the validation controls: The Regular Expression Validator allows validating the input text by matching against a pattern of a regular expression.
All the validation controls derive their basic functionality from the Specifies how to display the inline error message contained in the Text property.
It can be any of the Validator Display values Dynamic (the space is dynamically added), None (the message is never displayed), and Static (the space is occupied when the validation control is rendered).
For validation to work properly, the validation control and the input server control must be placed in the same container control.
Table 3.15 shows the important properties of the The validation controls discussed allow you to handle many different types of validations.
However, you might want to perform a validation that cannot be achieved by any of these validation controls.
This ensures that validations are not bypassed if a malicious user tries to circumvent the client-side validation.
Of course, if the client-side validation fails, the server-side validation is never performed.
Table 3.14 shows the important properties of the control can compare against a value specified to the validator control or against the value of another input control.