client-side-validation

RegularExpressionAttribute – How to make it not case sensitive for client side validation?

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I created this attribute which allows you to specify RegexOptions. EDIT: It also integrates with unobtrusive validation. The client will only obey RegexOptions.Multiline and RegexOptions.IgnoreCase since that is what JavaScript supports. [RegularExpressionWithOptions(@”.+@example\.com”, RegexOptions = RegexOptions.IgnoreCase)] C# public class RegularExpressionWithOptionsAttribute : RegularExpressionAttribute, IClientValidatable { public RegularExpressionWithOptionsAttribute(string pattern) : base(pattern) { } public RegexOptions RegexOptions { get; … Read more

Why do we need both client side and server side validation? [closed]

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Client-side validation just avoids the client from going “but I filled this all in and it didn’t tell me anything!”. It’s not actually mandatory, and in reality, client-side validation is a very new thing (read: 5 years old or less). In practice, all it does is prevent your client (with JS enabled) to know whether … Read more

Why is client-side validation not enough?

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Client-side validation – I assume you are talking about web pages here – relies on JavaScript. JavaScript powered validation can be turned off in the user’s browser, fail due to a scripting error, or be maliciously circumvented without much effort. Also, the whole process of form submission can be faked. Therefore, there is never a … Read more

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