winForm 打印相关

1.判断是在打印还是打印预览

        private void PrintDocument1_BeginPrint(object sender, PrintEventArgs e)
        {//打印前

              if (e.PrintAction == PrintAction.PrintToPrinter)
               {//打印
                   ;
               }
              else if (e.PrintAction == PrintAction.PrintToPreview)
              {//打印预缆
                  ;
              }

        }

2.获取打印机设置的纸张

                foreach (PaperSize PS in PrintDocument1.PrinterSettings.PaperSizes)
                {

                    if (PS.PaperName == "A4")
                    {
                        PrintDocument1.DefaultPageSettings.PaperSize = PS;
                    }

                }