I want to validate the file type to make sure the user is uploading an image of type JPEG, GIF, or PNG. Instead of checking the file extension, I figured using HttpPostedFile.ContentType would be safer since it checks the MIME content type.
Client side validation is important to improve usability.
What is the Regular Expression Validator for only Letters and Numbers in asp.net?
A ValidationSummary will show a list of errors on postback. As each field is fixed, it’s validator is fired, and any validation text will disappear. I want to automatically update the ValidationSummary as well.
Is it possible to disable request validation for HttpHandlers?
What is the best way to use validation on your site when I want to give people client side “helper” validation such as password not long enough, email is incorrect format but also do server side validation and return errors such as username already exists and have both client and server validation messages visually be displayed the same to the user with the minimal amount of duplication.
In asp.net is the PagesSection.ValidateRequest method enough to prevent all XSS attacks or is there something more that needs to be done?
I have an ASP.NET form that takes input from a user. There’s a Submit button on the form and a button called Calc which does a calculation to populate a text field. The problem I’m having is that on the form I have a set of <ASP:REQUIREDFIELDVALIDATOR> validators and when the Calc button is pressed the form gets validated. I don’t want the required fields to be validated when the Calc button is pressed, only the Submit button. Any way around this?
I have validation as below but only like to triggered if the checkbox is ticked.
I have a drop down (dropdown2) that is required IF there is something in it but it’s options data is driven by ajax from another dropdown (dropdown1) selection. Sometimes dropdown2 will be empty and in that case I can’t require it. So I can disable the requiredFieldValidators in javascript by calling this…