返回真CDocBuilderValue对象无效
字符串工作表 = C:/Program文件/ONLYOFICE/DocumentBuilderCDocBuilder.Initialize(workDirectory)!CDOCBuilder = 新建CDOCBuilderContextoContext=oBuilder.GetContextCvalueoGlobal=oContext.GetGlobal布尔bNull=oGlobal.IsNullCDocBuilder.Destroy();