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12-Feb-2017 21:55

This example has a text box that accepts user input, which is a potential security threat. NET Web pages validate that user input does not include script or HTML elements.

For more information, see Script Exploits Overview.

On more complex forms one field may only be required depending on the value or selection of another field.

A Required Field Validator cannot be used as the associated field will always expect user input irrespective of any other field values.

NET was developed in direct response to the problems that developers had with classic ASP. NET: Client-Side Validation: When validation is done on the client browser, then it is known as Client-Side Validation.

Since ASP is in such wide use, however, Microsoft ensured that ASP scripts execute without modification on a machine with the . We use Java Script to do the Client-Side Validation.

A Custom Validator can be used to customise the validation on either the client side, server side or both. If the Other radio button is selected a value must be entered in the textbox. The radio button group consists of individual radio buttons but a Radio Button List would work too.

If the client side Phone OSValidation javascript method returns false the form will be invalid and will not be submitted.

validating radiobuttonlist asp net-60

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The main advantage of Server-Side Validation is if the user somehow bypasses the Client-Side Validation, we can still catch the problem on server-side. NET: Answer: View State is the method to preserve the Value of the Page and Controls between round trips. View State is turned on by default and normally serializes the data in every control on the page regardless of whether it is actually used during a post-back. That means that a new instance of a page is created every time when we make a request to the server to get the page and after the round trip our page has been lost immediately Answer: Caching is one of the most interesting concept and operation in ASP. If you can handle it, you can run any web application by applying the caching concept depending on the requirements.If the user chooses to use an alternative address we need to validate that the required fields for the new address have been completed; if they decide to use their existing address then we need to validate that instead. NET site a Required Field Validator will ensure the user enters a value in the associated field before the form can be submitted to the server.My application contains a textbox which has to be filled if the user selected ‘Yes’ on a radiobutton. This little Java Script loops through all options to find out which one is checked.

The Required Field Validator does not help because you could not add a condition there. I’ve searched around and finally combined several sources into this solution so here is a complete overview how to set up. (Therefor of course it makes sense to ensure that at least one option is selected, e.g.

Net | Upload File in and Save in Folder, Ajax File Upload Control In Asp.



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