在定义的事件函数中发送参数
本文关键字:参数 函数 定义 事件 | 更新日期: 2023-09-27 17:56:38
我正在使用System.Net.NetworkInformation
Ping
类,我需要将一些字符串数据发送到事件函数以PingCompleted
事件处理程序。我试过这个:
void ex_ping_PingCompleted(object sender, PingCompletedEventArgs e, string adress)
{
}
。
ex_ping.PingCompleted += (sender1, args) => ex_ping_PingCompleted(sender1, new
PingCompletedEventArgs(), adress);
但它告诉我PingCompletedEventArgs
没有构造函数。我尝试制作自己的事件参数:
public class ProgressEventArgs : PingCompletedEventArgs
{
public string adress;
public ProgressEventArgs(string ex_adress)
{
adress = ex_adress;
}
}
同样的错误在这里。我只想知道我ping了什么地址,e.Reply.Address
事件功能给了我IP,我需要站点名称。
编辑:只是自己想通了:
ex_ping.PingCompleted += (sender1, args) => ex_ping_PingCompleted(sender1, args,adress);
void ex_ping_PingCompleted(object sender, PingCompletedEventArgs e,string ex_adress) {
}
工作正常,/关闭
订阅事件
ex_ping.PingCompleted += ex_ping_PingCompleted;
并在处理程序中获取地址
void ex_ping_PingCompleted(object sender, PingCompletedEventArgs e)
{
// verify if operation was not canceled or some error occured
var address = e.Reply.Address;
IPHostEntry entry = Dns.GetHostEntry(address);
var siteName = entry.HostName;
}
你追求的是UserState
属性:
void Ping()
{
string address = "google.com";
ex_ping.PingCompleted+=ex_ping_PingCompleted;
ex_ping.SendAsync(address, 500, buffer, options, address);
}
void ex_ping_PingCompleted(object sender, PingCompletedEventArgs e)
{
// Will give you the hostname
var address = e.UserState;
}