Articles → ASP.NET CORE → Validations In Asp.Net Core
Validations In Asp.Net Core
Scenario
Steps For Validation
- Create an entity and apply "Required" attribute over the property.
- Apply "asp-validation-summary" on the div tag.
- Add the span with the "asp-validation-for" attribute.
Code
using System.ComponentModel.DataAnnotations;
namespace BookManagementSystem.Model {
public class Book {
[Key]
public int Id {
get;
set;
}
[Required]
public string Name {
get;
set;
}
public string Author {
get;
set;
}
}
}
@page
@model BookManagementSystem.Pages.Books.CreateModel
<div class="border container" style="padding:30px">
<form method="post">
<div class="text-danger" asp-validation-summary="ModelOnly"></div>
<div class="form-group row">
<div class="col-3">
<label asp-for="MyBook.Name"></label>
</div>
<div class="col-5">
<input asp-for="MyBook.Name" class="form-control" />
</div>
<div class="col-4">
<span asp-validation-for="MyBook.Name" class="text-danger"></span>
</div>
</div>
<div class="form-group row">
<div class="col-3">
<label asp-for="MyBook.Author"></label>
</div>
<div class="col-5">
<input asp-for="MyBook.Author" class="form-control" />
</div>
<div class="col-4">
<span asp-validation-for="MyBook.Author" class="text-danger"></span>
</div>
</div>
<div class="form-group row">
<div class="col-4">
<input type="submit" value="Create" class="btn btn-primary form-control" />
</div>
</div>
</form>
</div>
@section Scripts{
<partial name="_ValidationScriptsPartial" />
}
Output
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