Exception message on wrong files

src/PriceListTools/AbstractPriceListTool.cs

@@ -36,8 +36,12 @@ namespace RehauSku.PriceListTools
 
             catch (Exception ex)
             {
+                System.Windows.Forms.MessageBox.Show
+                    (ex.Message,
+                    "Ошибка открытия шаблонного прайс-листа",
+                    System.Windows.Forms.MessageBoxButtons.OK,
+                    System.Windows.Forms.MessageBoxIcon.Information);
                 wb.Close();
-                throw ex;
             }
         }
 
@@ -52,9 +56,21 @@ namespace RehauSku.PriceListTools
             foreach (string file in files)
             {
                 Workbook wb = ExcelApp.Workbooks.Open(file);
-                PriceList priceList = new PriceList(wb);
+                try
-                sourcePriceLists.Add(priceList);
+                {
-                wb.Close();
+                    PriceList priceList = new PriceList(wb);
+                    sourcePriceLists.Add(priceList);
+                    wb.Close();
+                }
+                catch (Exception ex)
+                {
+                    System.Windows.Forms.MessageBox.Show
+                        (ex.Message,
+                        "Ошибка открытия исходного прайс-листа",
+                        System.Windows.Forms.MessageBoxButtons.OK,
+                        System.Windows.Forms.MessageBoxIcon.Information);
+                    wb.Close();
+                }
             }
             ExcelApp.ScreenUpdating = true;
         }

src/PriceListTools/ExportTool.cs

@@ -75,16 +75,16 @@ namespace RehauSku.PriceListTools
 
         public override void FillPriceList()
         {
-            if (SkuAmount.Count < 1) return;
+            if (SkuAmount.Count < 1) 
-
+                return;
-            PriceList offer = NewPriceList;
-            offer.Sheet.Activate();
 
             int exportedValues = 0;
 
+            ExcelApp.ScreenUpdating = false;
+
             foreach (var kvp in SkuAmount)
             {
-                Range cell = offer.Sheet.Columns[offer.skuCell.Column].Find(kvp.Key);
+                Range cell = NewPriceList.Sheet.Columns[NewPriceList.skuCell.Column].Find(kvp.Key);
 
                 if (cell == null)
                 {
@@ -97,7 +97,7 @@ namespace RehauSku.PriceListTools
 
                 else
                 {
-                    Range sumCell = offer.Sheet.Cells[cell.Row, offer.amountCell.Column];
+                    Range sumCell = NewPriceList.Sheet.Cells[cell.Row, NewPriceList.amountCell.Column];
 
                     if (sumCell.Value2 == null)
                         sumCell.Value2 = kvp.Value;
@@ -107,7 +107,10 @@ namespace RehauSku.PriceListTools
                     exportedValues++;
                 }
             }
+
             FilterByAmount();
+            ExcelApp.ScreenUpdating = true;
+
             AddIn.Excel.StatusBar = $"Экспортировано {exportedValues} строк из {SkuAmount.Count}";            
             Forms.Dialog.SaveWorkbookAs();
         }

src/PriceListTools/MergeTool.cs

@@ -9,6 +9,8 @@ namespace RehauSku.PriceListTools
         {
             int exportedValues = 0;
 
+            ExcelApp.ScreenUpdating = false;
+
             foreach (var sheet in sourcePriceLists)
             {
                 if (sheet.SkuAmount.Count == 0)
@@ -42,6 +44,8 @@ namespace RehauSku.PriceListTools
             }
 
             FilterByAmount();
+            ExcelApp.ScreenUpdating = true;
+
             AddIn.Excel.StatusBar = $"Экспортировано {exportedValues} строк из {sourcePriceLists.Count} файлов";
             Forms.Dialog.SaveWorkbookAs();
         }