init

DataPRO/Modules/Groups/GroupImport/View/GroupImportOptionsView.xaml.cs

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+using System.Collections.Generic;
+using DTS.Common.Interface.Groups;
+using GroupImport.Resources;
+
+namespace GroupImport
+{
+    /// <summary>
+    /// Interaction logic for GroupImportOptionsView.xaml
+    /// </summary>
+    public partial class GroupImportOptionsView : IGroupImportOptionsView
+    {
+        public GroupImportOptionsView()
+        {
+            InitializeComponent();
+        }
+
+        /// <summary>
+        /// controls whether it is possible to continue to preview or not
+        /// it is not possible to continue to preview if no files are selected
+        /// and you automatically advance to preview if you select a file
+        /// </summary>
+        /// <param name="errors"></param>
+        /// <param name="warnings"></param>
+        /// <returns></returns>
+        public bool Validate(out List<string> errors, out List<string> warnings)
+        {
+            errors = new List<string>();
+            warnings = new List<string>();
+
+            var vm = (GroupImportViewModel)DataContext;
+            if (null != vm.SourceFiles && vm.SourceFiles.Length >= 1) return true;
+            errors.Add(StringResources.Preview_NoFilesSelected);
+            return false;
+        }
+    }
+}