Compare Required Field Document For Free

Usage: Field-validator syntax: <field name="fieldName"> <field-validator type="required"> <message>validation error message</message> </field-validator> </field> Plain-validator syntax: <validator type="required"> <param name="fieldName">myField</param> <message>validation error message</message> </validator>

Step 1 ? Open Visual Studio ?> Create a new empty Web application. Step 2 ? Create a new web page and design web form with two textbox control along with button control. Step 3 ? Drag and drop RequiredFieldValidator control from Toolbox. Step 5 ? Set ControlToValidate = ID of the control (textbox) to validate.

RequirefFieldValidator is used when the specific filed is required, RangeValidator is used when specific value needs to be within the specified range, CompareValidator is used to compare the value of one control with fixed value of another control, RegularExpressionValidator validate the input value with the pattern of ...

In ASP.NET, the RequiredFieldValidator control ensures that a user has entered a value into an input control on a web form. If the user does not enter a value in a required field, there will be an error message. In ASP.NET, the RequiredFieldValidator control does not have any methods.

The CompareValidator control allows comparisons of entered data in an input control with a constant value or another value in a different control. It is commonly used when we need to confirm the entered password by the user at the registration time. The data is always case-sensitive.

Enhancing security: Validation controls can help prevent malicious code or other attacks that could harm the web application or its users. For example, validation controls can check for potentially dangerous input such as SQL injection or cross-site scripting (XSS) attacks.

This validator is used to make an input control required. It will throw an error if user leaves input control empty. It is used to mandate form control required and restrict the user to provide data.