使用xlDialogPrint.show方法时，为什么我在c＃中显示Dialog类的Show方法失败？

Question

我正在尝试使用visual studio在C＃中打印Microsoft Excel文档，每次尝试执行这段代码时，我都会得到一个Dialog类的Show方法失败异常：

bool userDidntCancel =
       ExcelApp.Dialogs[Excel.XlBuiltInDialog.xlDialogPrint].Show(
           Type.Missing, Type.Missing, Type.Missing, Type.Missing,Type.Missing,
           Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
           Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
           Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
           Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
           Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

以下是我正在使用的完整代码：

            Excel.Application ExcelApp = new Excel.Application();

            Excel.Workbook wb = ExcelApp.Workbooks.Open(
            PATH,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing);

            Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];

    try
    {
        bool userDidntCancel =
           ExcelApp.Dialogs[Excel.XlBuiltInDialog.xlDialogPrint].Show(
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
    }
    catch
    {
        ExcelApp.Quit();
        File.Delete("Container Status.xls");
    }

我有什么遗失的吗？