ASP.NET Training – Learn to Validate User Input in ASP.NET Pages
ASP.NET training is mandatory for those willing to learn asp.net programming concepts in order to possess a future in it. If asp.net web developer is what you want to become in the near future then there are plenty of .NET courses in the market, available for you to get thoroughly trained in web development using the programming language. Basic to advanced .net training courses or programs backed with live projects, workshops and seminars are provided at the training centres today to train students on dot net web development concepts. Such courses provide the best understanding of the programming language through practical training and focus on each and every element involved in .NET web development. One of the important concepts included in such .Net training courses is that of the validation controls.
What are validation controls and why are they used?
Concept of validation controls in Asp.Net is a mechanism to validate or verify whether the input entered by the user in web pages in valid or not. Usage of such controls in programming for web pages ensures security and rather integrity of data by avoiding the useless, unauthenticated or contradictory data from getting stored.
How these validation controls work for input data validation?
In ASP.NET validation is performed on the server and hence even the validation controls perform the task of input checking in server code. The validation controls are validated to check the input whenever a user enters it and clicks on submit button in the web page. Upon the submission every validation control in the web page will perform the test accordingly on the user input and set a property to indicate whether the input passed the test. One after one all the validation controls are called and thus a property on the page is set which shows whether any failure of validation check has occurred or not. During the validation process if any validation error has occurred in any of the input controls then the page will enter into invalid state and hence user cannot perform any other activity on the page until he/she enters the valid data in that control. Hence this is how one ensures integrity of data entered in asp.net pages through validation controls.
How to validate user input in asp.net pages with various validation controls?
Different kinds of validation controls are usually associated with HTML and web server controls for user input validation in the asp.net program. These controls are as follows.
This validation control is generally associated with text box. It performs check on whether data is entered into the field or not. Hence, if you want a user to compulsorily enter data in a field in your asp.net page, then adding RequiredFieldValidator control to the field or specific input control is mandatory.
This control ensures the input range for an input field in the web page. For example if you have a date field in your web page and there if you want set a validator ensuring a date within a specific range only is entered, then using RangeValidator is just right option.
The function of this validation control resembles its name. It allows validation of the test by matching against a pattern or a regular expression.
This validation control is used to allow the comparison of one input control value to a fixed value or with the value of another input control. Hence, this is a useful validation technique to make comparisons between two form controls in asp.net pages.
It allows you to write a customized application specific validation routine for both client as well as server-side validation.
Hence, this way you can perform validation of user entered input for asp.net web pages. A detailed procedure of how actually are these validation controls used in actual .NET program can be learnt in theoretical and practical sessions in aspo.net training classes. Hence, join ASP.NET training and learn development of web pages efficiently. At Tops, we do provide training in .net technology under the guidance of experts having extensive industry knowledge. These experts are well-versed with concepts of asp.net development and hence can very well train the students so that they can learn efficient ways of developing .net applications of various kinds and with various requirements.