Form validation of empty strings
Clash Royale CLAN TAG#URR8PPPForm validation of empty strings
How can I make the form first name input field not accept empty strings with space characters " "
" "
<form asp-action="SaveRegistration" autocomplete="off">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="FirstName" class="control-label"></label>
<input asp-for="FirstName" class="form-control" />
<span asp-validation-for="FirstName" class="text-danger"></span>
</div>
Model:
public class ContactInfo
{
[Required(ErrorMessage = "This field is required")]
[StringLength(50)]
[DisplayName("First name")]
public string FirstName { get; set; }
}
With [Required] attribute the user can still submit with a string with just space characters " "
[Required]
" "
I know it's a simple question, but I am novice in ASP.NET MVC
[StringLength]
@Html.TextBoxFor()
msdn.microsoft.com/en-us/library/… try this?
– Bola
29 mins ago
@BagusTesa I am already using StringLength. How is
Html.TextBoxFor better than <input asp-for="FirstName" ?– Don Box
8 mins ago
Html.TextBoxFor
<input asp-for="FirstName"
@Bola How does
MinLength helps? I want to prevent user from entering string of just space characters, I don't want to restrict to a minimum length– Don Box
4 mins ago
MinLength
[Required(AllowEmptyStrings = false)] - is this work? Sounds like you can write custom RequiredAttribute with IsNullOrWhiteSpace check.– Tetsuya Yamamoto
4 mins ago
[Required(AllowEmptyStrings = false)]
RequiredAttribute
IsNullOrWhiteSpace
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you know, you can use
[StringLength]and.. what deters you from using@Html.TextBoxFor()?– Bagus Tesa
30 mins ago