Binding function by states and terms done

StructureHelperCommon/Infrastructures/Commands/RelayCommand.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace StructureHelperCommon.Infrastructures.Commands
+{
+    public class RelayCommand : ICommand
+    {
+        private Action<object> execute;
+        private Func<object, bool> canExecute;
+
+        public event EventHandler CanExecuteChanged
+        {
+            add => CommandManager.RequerySuggested += value;
+            remove => CommandManager.RequerySuggested -= value;
+        }
+
+        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
+        {
+            this.execute = execute;
+            this.canExecute = canExecute;
+        }
+
+        public bool CanExecute(object parameter) => canExecute == null || canExecute(parameter);
+
+        public void Execute(object parameter) => execute(parameter);
+    }
+
+}