为什么可以';t我调用WriteLogDataToDb方法
本文关键字:调用 WriteLogDataToDb 方法 为什么 | 更新日期: 2023-09-27 18:22:04
我正在为工作中的内部应用程序制作一个用户非活动记录器,并且我在将消耗的消息写入MySQL数据库时遇到了问题,当我试图调用将消息写入数据库的方法时,它会抛出一个错误:"AccessEye.LogData"是一个"类型",在给定的上下文中无效
如有任何帮助,我们将不胜感激,这是一个windows窗体项目,其顶层服务被用作RabbitMQ消费者,最终将消息转发到数据库,如前所述=]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using NLog;
using IWshRuntimeLibrary;
using Topshelf;
using System.Data.Odbc;
using EasyNetQ;
using RabbitMQ;
using EasyNetQ.Topology;
using System.Threading.Tasks;
using System.Windows.Forms;
using AccessEye;
using System.ComponentModel;
namespace LogService
{
public class WindowsServiceHost : ServiceControl, ServiceShutdown
{
public static readonly Logger Logger = LogManager.GetCurrentClassLogger();
public static void WriteLogDataToDb(LogData data)
{
using (var db = new LogService.UserActivityDataContext())
{
DbLogData logData = AutoMapper.Mapper.Map<LogData, DbLogData>(data);
int t = (int)data.EventType;
EventType eventType = db.EventTypes.FirstOrDefault(r => r.Id == t);
if (eventType == null)
{
eventType = db.EventTypes.Add(new EventType
{
Event = GetEnumDescriptionAttributeValue(data.EventType),
Id = (int)data.EventType
});
db.SaveChanges();
}
logData.EventTypeId = eventType.Id;
db.LogEvents.Add(logData);
db.SaveChanges();
}
}
public static string GetEnumDescriptionAttributeValue(Enum value)
{
var fieldInfo = value.GetType().GetField(value.ToString());
var attributes = (DescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
return attributes.Length > 0 ? attributes[0].Description : value.ToString();
}
public bool Start(HostControl hostControl)
{
Program.bus = RabbitHutch.CreateBus("host=as01.access.local;virtualHost=DEV-Reece;username=reece;password=reece").Advanced;
//var bus = RabbitHutch.CreateBus("host=as01.access.local;virtualHost=DEV-Reece;username=reece;password=reece").Advanced;
var queue = Queue.Declare(true, false, true, null);
var exchange = Exchange.DeclareFanout("UserActivityFanout", true, false, null);
var exchangeTopic = Exchange.DeclareTopic("UserActivity", true, false, null);
queue.BindTo(exchange, "#");
exchange.BindTo(exchangeTopic, "#");
Program.bus.Subscribe<AccessEye.LogData>(queue, (msg, messageRecInfo) => Task.Factory.StartNew(() =>
{
WriteLogDataToDb(AccessEye.LogData);
//AppForm.WriteLogDataToDb(data);
//Console.WriteLine(msg.Body.UserName + " -- " + msg.Body.ComputerName + " -- " + msg.Body.EventType + " -- " + msg.Body.TeamviewerId);
}));
return true;
}
public bool Stop(HostControl hostControl)
{
Logger.Trace("STOP");
Program.bus.Dispose();
return true;
}
public void Shutdown(HostControl hostControl)
{
Logger.Trace("SHUTDOWN");
Program.bus.Dispose();
}
}
}
您正在将Type
作为参数传递给WriteLogDataToDb()
方法,而它需要AccessEye.LogData
的实例。
我不知道你想在哪里初始化你的变量,但为了"修复"(你正在用我建议的代码初始化一个默认实例)你的问题,你可能必须更改这段代码。
Program.bus.Subscribe<AccessEye.LogData>(queue,
(msg, messageRecInfo) => Task.Factory.StartNew(() =>
{
WriteLogDataToDb(new AccessEye.LogData());
}));
请注意,我不知道为AccessEye.LogData
类型定义了什么构造函数,但您可能知道。
另一方面,我假设lambda表达式的参数之一是所需类型的实例。
Suscribe()
方法的类型是AccessEye.LogData
?
编辑:
正如OP在评论中所说,解决方案是用以下代码片段替换原始代码:
Program.bus.Subscribe<AccessEye.LogData>(queue,
(msg, messageRecInfo) => Task.Factory.StartNew(() =>
{
var data2 = LogDataFactory.CollectData();
data2.EventType = AccessEye.UserStateEvents.Logon;
WriteLogDataToDb(data2);
}));
您的操作似乎不正确,您想写入数据库的是消息的正文,而不是消息的类型;
Program.bus.Subscribe<AccessEye.LogData>(queue, (msg, messageRecInfo) =>
Task.Factory.StartNew(() =>
{
WriteLogDataToDb(msg.Body);
}));