我有XML文件如下:
<?xml version="1.0" encoding="ISO-8859-1"?>
<sami>
<title>IN[1]=false</title>
<title>IN[2]=true</title>
<title>OUT[1]=true</title>
<title>OUT[2]=flase</title>
<title>OUT[3]=flase</title>
<title>OUT[4]=flase</title>
<title>$IN[5]=false</title>
</sami>
问题:如何使用C#每秒读取xml数据?
我尝试了以下方法:
private void Form1_Load(object sender, EventArgs e)
{
DateTime nextRead;
Thread thread = new Thread(() =>
{
nextRead = DateTime.Now.AddSeconds(1000);
XDocument doc = XDocument.Load("C:\\Users\\lenovo\\Desktop\\Sxml.xml");
var result = doc.Descendants("title").ToList();
textBox1.Text = result[0].Value;
// listBox1.Items.Add(result[0].Value);
// listBox1.Items.Add(result[1].Value);
// listBox1.Items.Add(result[2].Value);
Thread.Sleep(Math.Max(0, (DateTime.Now - nextRead).Milliseconds));
});
thread.Start();
}
您可以使用Task.Delay重复读取xml文件。 1,创建一个重复读取xml文件的任务方法:
static async Task RepeadtReadingXml(int delayMillis, int repeatMillis, CancellationToken ct)
{
Console.WriteLine("{0}: Start reading xml file", DateTime.Now);
await Task.Delay(delayMillis, ct);
while (true)
{
Console.WriteLine("{0}: Reading xml file every 1 sec", DateTime.Now);
//***************************************************//
// Add you logic to read your xml file here //
//***************************************************//
await Task.Delay(repeatMillis, ct);
}
}
并将其称为您需要重复阅读的地方:
var cts = new CancellationTokenSource(); // Work for 5 sec
try
{
RepeadtReadingXml(2000, 1000, cts.Token).Wait();
}
catch (AggregateException ae)
{
ae.Handle(e => e is TaskCanceledException);
}
为此,您需要从工具箱添加到表单Timer
。
将qazxsw poi间隔设置为1000毫秒。为qazxsw poi事件创建事件处理程序:
timer1