如何在SDK中从UDO形式的SAP B1中获取DocEntry？

using SAPbobsCOM;

// 创建连接对象
Company company = new Company();
company.Server = "服务器地址";
company.CompanyDB = "公司数据库";
company.UserName = "用户名";
company.Password = "密码";
company.DbUserName = "数据库用户名";
company.DbPassword = "数据库密码";
company.language = BoSuppLangs.ln_English; // 设置语言

// 连接到SAP B1数据库
int result = company.Connect();
if (result != 0)
{
    Console.WriteLine("连接到SAP B1失败");
    return;
}

// 获取UDO数据
UserObjectsMD userObject = (UserObjectsMD)company.GetBusinessObject(BoObjectTypes.oUserObjectsMD);
userObject.GetByKey("UDO名称");
Recordset recordset = (Recordset)company.GetBusinessObject(BoObjectTypes.BoRecordset);
string query = "SELECT DocEntry FROM [@UDO名称] WHERE 查询条件";
recordset.DoQuery(query);

// 遍历UDO数据，获取DocEntry
while (!recordset.EoF)
{
    string docEntry = recordset.Fields.Item("DocEntry").Value.ToString();
    Console.WriteLine("UDO的DocEntry为：" + docEntry);
    recordset.MoveNext();
}

// 断开与SAP B1的连接
company.Disconnect();