Helpful error message on import

Web/DAL/LogImporter.cs

@@ -60,8 +60,11 @@ namespace MileageTraker.Web.DAL
 						return dateTimeValue.ToShortDateString();
 					};
 
-				var logImportViewModel = 
+				ImportLogViewModel logImportViewModel;
-					new ImportLogViewModel
+
+				try
+				{
+					logImportViewModel = new ImportLogViewModel
 					{
 						CityName = getRowValue("Destination City"),
 						Date = getRowDateValue("Date"),
@@ -72,6 +75,11 @@ namespace MileageTraker.Web.DAL
 						Purpose = getRowValue("Purpose"),
 						VehicleId = getRowValue("Vehicle ID")
 					};
+				}
+				catch (Exception ex)
+				{
+					throw new ImportException(ex.Message + " on row " + (r + 1));
+				}
 				yield return logImportViewModel;
 			}
 		}