- Tag br in appsettings

- Attribute per controllo validità email

StandManager/Utils/EmailCheckAttribute.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+using System.Text.RegularExpressions;
+
+namespace StandManager.Utils;
+
+public class EmailCheckAttribute : ValidationAttribute
+{
+    protected override ValidationResult? IsValid(object? value, ValidationContext validationContext)
+    {
+        var str = value as string;
+        if (string.IsNullOrEmpty(str)) return ValidationResult.Success;
+
+        if (!Regex.IsMatch(str, "^[\\w-\\.\\+]+@([\\w-]+\\.)+[\\w-]{2,}$"))
+        {
+            return new ValidationResult(ErrorMessage ?? "Inserire un indirizzo Email valido");
+        }
+        return ValidationResult.Success;
+    }
+}