ASP NET Core model validation

[@artak9439]

5:50 Instead of Regular Expression we can use [EmailAddress] validation attribute for email format validation.

[@get_ready]

Pretty slick, thanks for sharing!

[@sephiroth4488]

MVP

[@AmirKMilbes]

I have to disagree with this. [EmailAddress] allows entries like "Peter@test" which of course is missing the .something part. So ultimately, Venkat's RegularExpression version is better.

[@NiazMohammad]

@@AmirKMilbes Even that regex is not good enough. it's just a format checker of the form abc@a.b; not an actual domain or email service provider checker. However, yes u r right, the regex by Venkat is better than [EmailAddress]

[@abdelrahmanahmed7777]

you can use System.Net.Mail as a type for Employee Email property instead of string

[@GavinLon]

I really appreciate your teaching style.

[@hetalchavan7379]

at 8:20, after using [MaxLength(50,ErrorMessage ="Name can not exceed 50 characters")], it is not showing a validation message. Instead, it does allow user to enter more than 50 characters.(.net core 3.1)

[@conaxlearn8566]

I think you mean 'it does *not* allow user to enter....'?

[@namanvohra8262]

@@conaxlearn8566 It does allow

[@anupambhardwaj7559]

very helpful for beginners each an every topic explained very clearly

[@gaganmudvari1553]

waiting for you next video. great series . thank you vankat.

[@pravendramsc]

Venkat Sir, your way to describe concept is fabulous thanks put your efforts

[@DarkGT]

Simply fantastic! As always.

[@sakthir3892]

Dear Venkat sir, Thanks for effort to put videos.. keep rocking ...

[@dangkolache]

Venkat, thank you as always. I have a question - if I am using EF Core, typically people do not use interfaces so you would pass along your db entity as your model properties. However, what if I only wanted to require certain values only on certain viewmodels? I cannot put the validation decorator on the db entity because then every viewmodel would use those decorators. Prior to using EF core, I would use an interface to create another class, but I do not have an interface with EF Core. Do I have to manually make a new class and manually map it to my db entity? Or use something like automapper? Or is there a cleaner way?

[@conaxlearn8566]

2:36 In later videos, if(ModelState.IsValid) was not used for adding and editing records. I've tried removing this check in the HomeController Create action and validation still works. So I don't know what this check is really being used for.

[@hemantagrawal1122]

the validations are not working for me if i'm removing this if statement

[@TT-ud5gf]

Where can we find a list of all possible attributes to use? Which keyword should I search MSDN?

[@conaxlearn8566]

This is how you find all attributes: 1. In the Employee model class, right-click on the [Required] attribute, then select 'Go to definition'. 2. Note that the RequiredAttribute class belongs to System.ComponentModel.DataAnnotations. 3. Google System.ComponentModel.DataAnnotations. The first result link should be the one you want to click into. 4. Just in case it did not get you there, here's the link: docs.microsoft.com/en-us/dotnet/api/system.componentmodel.dataannotations?view=net-5.0

[@harshsugandhi07]

I have a question, how do I perform validation on DropDown that we have created ?

[@roadtripping]

At 9:45 I'm confused. In the Create actionmethod, you are returning View(); without any model. Yet when you post the form, all of your original inputs are persisted across posts - and the validation information is sent back too - but you never returned the model back with the view! You only did return View(); and not return View(employee); I wonder how your original data is being persisted across post backs?

[@hemantagrawal1122]

it was not returning the Index method, it just simply return the create method

[@aaravbhadani5195]

you are legendary man!!

[@puneetkankar]

This is very helpful thanks..

[@VivekKumar-nt9wy]

Sir Thanks a lot for your amazing effort

[@rohanrvs]

Do we have something like validation group property in dot net core. Something similar to validation controls in asp.net

[@robmays6982]

very enjoyable

[@usamabaloch6178]

[Required, MaxLength(50, ErrorMessage = "Name cannot exceed 50 characters")] is not working :( in asp.net core 3.1

[@yasirirfan5262]

thumbs up

[@rpabeginners4576]

Thank you sir, i have problem in dropdownlist validations

[@coolwaterdvr]

Thanks Venkat.

[@nasirkiyani4356]

Thank you so much sir.

[@RachitJain4U]

Thanks Sir :)

[@naodagere8210]

Thanks

[@MmMm-tg5mq]

thanx thanx thanx

[@darkogele]

LOVE U MAN !!! not in a gay way do :D