映射xml文件，然后导入xmls文件c＃

Question

我正在尝试将XML文件映射到Excel文件，然后在点网C＃中导入其他文件 在第xlWorkbook.XmlImport(item, out xmlMap, false);行中出现异常

请帮助

public static void test2()
{

    string mappingfile = @"C:\mapping\template.xml";
    string folder = @"C:\mapping\";
    string filter = "*.xml";
    string[] files = Directory.GetFiles(folder, filter);

    //Mapping xml file and than import xmls files c#         
    string filepath = @"C:\mapping\2.xlsx";

    Excel.Application xlApp = new Excel.Application();
    xlApp.DisplayAlerts = false;

    Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(filepath);
    Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
    Excel.Range xlRange = xlWorksheet.UsedRange;

    var xmlMap = xlWorkbook.XmlMaps.Add(mappingfile, "InventoryResponse");
    xlWorkbook.XmlImport(mappingfile, out xmlMap, true, "$A1");   

    foreach (string item in files)
    {
        if (item == mappingfile)
        {
            continue;
        }
        xlWorkbook.XmlImport(item, out xmlMap, false);
      }

    xlWorkbook.RefreshAll();
    xlWorkbook.SaveAs(@"C:\mapping\test.xlsx");
    xlWorkbook.Close();
    xlApp.Quit();
}