Fix #5054: parse string to number with invariant culture.

Oqtane.Shared/Shared/SharedConverter.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Oqtane.Shared
+{
+    public sealed class SharedConverter
+    {
+        public static int ParseInteger(string value)
+        {
+            return ParseInteger(value, CultureInfo.InvariantCulture, 0);
+        }
+
+        public static int ParseInteger(string value, CultureInfo cultureInfo)
+        {
+            return ParseInteger(value, cultureInfo, 0);
+        }
+
+        public static int ParseInteger(string value, CultureInfo cultureInfo, int defaultValue)
+        {
+            if (int.TryParse(value, cultureInfo, out int result))
+            {
+                return result;
+            }
+
+            return 0;
+        }
+    }
+}