Regular expression for validating email address asp net
Importantance of returning false It's very important to use the return false statement after the condition block that return false so if validation determines that the business requirements are not met then the form cannot be submitted.
String Examples: sdfsdf0sd12s3e45d6sdfsdf789 0123456789 s0s1s2s4s5s6s7s8s9ssssss 012-345-6789 1-123-654-6547 This isn't so much for validation as just cleaning up the invalid string before inserting it into the database.If an error message is not specified, a default error message is displayed.Now that you have some idea about data annotation attributes, let's develop a simple ASP.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.Now add the condition to ensure that all controls have a value, if the values are not entered in the form control then it will show a message.
The condition will be as follows: is shown to the user and finally we are returning false; that is very important.
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.
NET MVC application that makes use of these attributes for data validation. NET MVC project and select the Empty project template.
Then add a new SQL Server database named User Db to the App_Data folder and create a table - User Profile.
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.