Validation controls in asp
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KS Technologies provides live project training for various courses in Vadodara, India. Phone numbers are provided for more details. The document discusses different validation controls in ASP.NET that validate user input data. It describes the RequiredFieldValidator, RangeValidator, CompareValidator, RegularExpressionValidator, CustomValidator, and ValidationSummary controls and their properties and functions.
Validation controls in asp
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- 2. VALIDATION CONTROLS IN ASP.NET Visit us: http://www.kstechnologies.co
- 3. Validation Controls ASP.NET validation controls validate the user input data to ensure that useless, unauthenticated, or contradictory data don't get stored. ASP.NET provides the following validation controls: RequiredFieldValidator RangeValidator CompareValidator RegularExpressionValidator CustomValidator ValidationSummary
- 4. RequiredFieldValidator Control The RequiredFieldValidator control ensures that the required field is not empty. It is generally tied to a text box to force input into the text box.
- 5. RangeValidator Control The RangeValidator control verifies that the input value falls within a predetermined range. It has three specific properties: Properties Description Type It defines the type of the data. The available values are: Currency, Date, Double, Integer, and String. MinimumValue It specifies the minimum value of the range. MaximumValue It specifies the maximum value of the range.
- 6. CompareValidator Control The CompareValidator control compares a value in one control with a fixed value or a value in another control. It has the following specific properties: Properties Description Type It specifies the data type. ControlToCompare It specifies the value of the input control to compare with. ValueToCompare It specifies the constant value to compare with. Operator It specifies the comparison operator, the available values are: Equal, NotEqual, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual,
- 7. RegularExpressionValidator The RegularExpressionValidator allows validating the input text by matching against a pattern of a regular expression. The regular expression is set in the ValidationExpression property. The following table summarizes the commonly used syntax constructs for regular expressions: Character Escapes Description b Matches a backspace. t Matches a tab. r Matches a carriage return. v Matches a vertical tab. f Matches a form feed. n Matches a new line. Escape character.
- 8. CustomValidator he CustomValidator control allows writing application specific custom validation routines for both the client side and the server side validation. The client side validation is accomplished through the ClientValidationFunction property. The client side validation routine should be written in a scripting language, such as JavaScript or VBScript, which the browser can understand. The server side validation routine must be called from the control's ServerValidate event handler. The server side validation routine should be written in any .Net language, like C# or VB.Net.
- 9. ValidationSummary The ValidationSummary control does not perform any validation but shows a summary of all errors in the page. The summary displays the values of the ErrorMessage property of all validation controls that failed validation. The following two mutually inclusive properties list out the error message: ShowSummary : shows the error messages in specified format. ShowMessageBox : shows the error messages in a separate window.