Server Side Validation Validation done at the server level after sending the form data to the server but before entering the data into the database is called server-side validation. The first page source code Look at the preceding source code closely; see the id's of controls that play the important role in Java Script validation by reading the ASP. The design view of the preceding source code will look as in the following: I hope you have created the same form as above for demonstration purposes. Net controls values in Java Script are as: There are three main methods shown in the above image in the red square to read the ASP.Net controls values; they are:get Element By Id: this method is used to read the controls values by their Element By Name: this method is used to read the controls values by their Element By Tag Name: this method is used to read the controls values by their Tag Name.
the following is the java script code for validating function . You have to use get Element By Id to get a handle on the box (you can use it indirectly via j Query, but let's not get pedantic), the issue is if you use get get Element By Id and pass the result to your function, or pass just the id to your function and use get Element By Id inside the function itself.(34 printed pages) Introduction Looking at Validation The Required Field Validator Control The Compare Validator Control The Range Validator Control The Regular Expression Validator Control The Custom Validator Control The Validation Summary Control Conclusion In your studies of ASP.NET, you might have been introduced to a number of different types of controls, whether HTML server controls or Web server controls. NET Summary: Learn how to use all the available ASP.This paper introduces these new controls and discusses tips and tricks on working with them in practical scenarios.Summary From all the examples above we see how to validate the form data using Java Script.
I hope this article is useful for all students and beginners.In the User page the user enters the form details and then only after validating the details the page is redirected to the User page.Use the following code in the create button: In the code above, only after validating the form data, the page is redirected to the User page. Net web application and click on the Create button without inserting any data in the form, then it will show the following alert message.In the preceding screen you clearly see that even I have wriiten the code on the create button to redirect to the next page but it will not be redirected because the form data is blank and it does not satisfy our validation condition that we set.In other words, it's clear that the validation is done at the client side in the browser level and only validates the data; it will execute the server-side code.Therefore the return false statement works similar to the Required Field validator of ASP. The entire function will be as follows: I hope you have understood it then the Solution Explorer will look like as in the following: In the preceding Solution Explorer, their are two ASP.