我创建了一个 Windows 窗体 应用程序来 ping 一个 IP 地址列表,然后我使用一个 Timer
每 30
秒重复一次 ping .这是我使用的代码:
private System.Timers.Timer timer;
public Form1()
{
InitializeComponent();
timer = new System.Timers.Timer();
timer.Interval = 30000;
timer.Enabled = true;
timer.Elapsed += button1_Click;
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
pingResults.Clear();
ipAddress.Add("10.100.1.1");
ipAddress.Add("10.100.1.2");
ipAddress.Add("10.100.1.3");
ipAddress.Add("10.100.1.4");
ipAddress.Add("10.100.1.5");
ipAddress.Add("10.100.1.100");
for (int i = 1; i < 7; i++)
{
pictureBoxList.Add((PictureBox)Controls.Find("pictureBox" + i, true)[0]);
}
Parallel.For(0, ipAddress.Count(), (i, loopState) =>
{
Ping ping = new Ping();
PingReply pingReply = ping.Send(ipAddress[i].ToString());
this.BeginInvoke((Action)delegate()
{
pictureBoxList[i].BackColor = (pingReply.Status == IPStatus.Success) ? Color.Green : Color.Red;
});
});
}
private void button1_Click(object sender,ElapsedEventArgs e )
{
backgroundWorker1.RunWorkerAsync();
}
但是我收到了这个错误信息:
Error 1 No overload for 'button1_Click' matches delegate 'System.EventHandler'
我尝试了很多例子,但我不知道如何使用 Timer
。这里的问题是什么,或者是否有任何其他方法可以重复 Ping?
最佳答案
请注意,Button.Clicked
和 Timer.Elapsed
具有不同的签名;你,可能,想要
public Form1()
{
InitializeComponent();
timer = new System.Timers.Timer();
timer.Interval = 30000;
timer.Enabled = true;
timer.Elapsed += timer_Elapsed; // not button1_Click
}
...
private void timer_Elapsed(object sender, ElapsedEventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
private void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
或者您可以借助lambda 函数 完全摆脱timer_Elapsed
:
public Form1()
{
InitializeComponent();
timer = new System.Timers.Timer();
timer.Interval = 30000;
timer.Enabled = true;
timer.Elapsed += (s, e) => {backgroundWorker1.RunWorkerAsync();};
}
...
private void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
关于c# - 每 30 秒重复一次 ping,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57970823/