rangevalidator Control To Validate property value set the input control to validate.
Minimum Value and Maximum Value specify the valid range of control inputted value.
by Error Message property we can set rangevalidator validation fail error message text.
Traditionally, Web developers have faced a tough choice when adding form validation logic to their pages.
You can add form validation routines to your server-side code, or you can add the validation routines to your client-side code.
You can check ranges within pairs of numbers, alphabetic characters, and dates. Use the Control To Validate property to specify the input control to validate.
The Minimum Value and Maximum Value properties specify the minimum and maximum values of the valid range, respectively.
NET validation controls perform validation automatically when the page is posted back to the server, after page initialization (that is, after view-state and postback data have been processed) and before your event-handling code is called.
The controls might also perform validation in the browser if the browser supports client script.
validation ignore if you not set a requiredfieldvalidator and user leave input field without entering any value.
this example show you how can we validate date range using rangevalidator control.
However, there are times when you might want to perform validation yourself programmatically.
You might validate programmatically under these circumstances: By default, the ASP.
For this reason, in the past, many developers decided to add all their form validation logic exclusively to server-side code.