Events-MVC (example with htmx)

Events-MVC/Events.MVC/Util/Extensions/ModelStateExtensions.cs

@@ -0,0 +1,23 @@
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+using System.Text;
+
+namespace Events.MVC.Util.Extensions
+{
+  public static class ModelStateExtensions
+  {
+    public static string GetErrorsString(this ModelStateDictionary modelState)
+    {
+      StringBuilder sb = new StringBuilder();
+      foreach (var modelStateEntry in modelState)
+      {
+        if (modelStateEntry.Value.Errors.Count > 0)
+        {
+          string key = modelStateEntry.Key;
+          string error = string.Join(", ", modelStateEntry.Value.Errors.Select(e => e.ErrorMessage));
+          sb.AppendFormat("{0}: {1}; ", key, error);
+        }
+      }
+      return sb.ToString();
+    }
+  }
+}