Projektdateien hinzufügen.

VideoBrowser/Common/RelayCommand.cs

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+namespace VideoBrowser.Common
+{
+    using System;
+    using System.Windows.Input;
+
+    /// <summary>
+    /// The WPF default command.
+    /// </summary>
+    /// <seealso cref="System.Windows.Input.ICommand" />
+    public class RelayCommand : ICommand
+    {
+        private readonly Func<object, bool> _canExecute;
+
+        private readonly Action<object> _execute;
+
+        private readonly string _name;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RelayCommand"/> class.
+        /// </summary>
+        /// <param name="execute">The execute.</param>
+        /// <param name="canExecute">The can execute.</param>
+        public RelayCommand(Action<object> execute, string name = "", Func<object, bool> canExecute = null)
+        {
+            this._execute = execute;
+            this._name = name;
+            this._canExecute = canExecute;
+        }
+
+        /// <summary>
+        /// Occurs when changes occur that affect whether or not the command should execute.
+        /// </summary>
+        public event EventHandler CanExecuteChanged
+        {
+            add { CommandManager.RequerySuggested += value; }
+            remove { CommandManager.RequerySuggested -= value; }
+        }
+
+        /// <summary>
+        /// Defines the method that determines whether the command can execute in its current state.
+        /// </summary>
+        /// <param name="parameter">Data used by the command.  If the command does not require data to be passed, this object can be set to <see langword="null" />.</param>
+        /// <returns>
+        ///   <see langword="true" /> if this command can be executed; otherwise, <see langword="false" />.
+        /// </returns>
+        public bool CanExecute(object parameter)
+        {
+            return this._canExecute == null || this._canExecute(parameter);
+        }
+
+        /// <summary>
+        /// Defines the method to be called when the command is invoked.
+        /// </summary>
+        /// <param name="parameter">Data used by the command.  If the command does not require data to be passed, this object can be set to <see langword="null" />.</param>
+        public void Execute(object parameter)
+        {
+            this._execute(parameter);
+            Logger.Info($"{nameof(RelayCommand)} {this._name} is executed");
+        }
+    }
+}