Validating user input in a web forms page
In this article we are going to see, how we can reduce the programmers effort on coding, reducing the execution process time and simplify the code handling and less number of lines in the coding.In this control we can validate and compare two input variables based on their data type using the comparison operators like equal to, not equal to, greater than, les than etc.
In this server control, we can validate the user input passes to the customized logic. For example: In on-line banking the amount transfer transferred by the user is valid against his available balance (it should be less than his balance. On the next screen you will see Asp Net Sql Provider. Go to the Provider tab and click on "Select a single provider for all site management data" option. Validation is important part of any web application.User's input must always be validated before sending across different layers of the application.Validation controls are used to: Client side validation is good but we have to be dependent on browser and scripting language support. NET Web pages for user input is to be able to check that the information users enter is valid. NET provides a set of validation controls that provide an easy-to-use but powerful way to check for errors and, if necessary, display messages to the user. NETUsually, Validation is invoked in response to user actions like clicking submit button or entering data.
Client side validation is considered convenient for users as they get instant feedback. Suppose, you wish to perform validation on page when user clicks submit button. To make this happen, simply set the Cause Validation property to true for submit button as shown below: Lets understand validation controls one by one with practical demonstration: Required Field Validation Control The Required Field Validator control is simple validation control, which checks to see if the data is entered for the input control.
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Article Description When working with Web applications, developers need to write two separate codes using Java Script and VB Script to validate user inputs.