C#如果它超过2秒时间较长如何停止的方法? [英] C# How to stop a method if it takes longer than 2 seconds?
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问题描述
下面的程序将连接到网络,并获得msnbc.com网页的HTML内容并打印出结果。如果需要超过2秒,从网页中获取数据,我想我的方法停止工作,并返回。你能告诉我,我怎么可以这样用一个例子?
公共部分Form1类:表格
{
公共Form1中()
{
的InitializeComponent();
}
私人无效的button1_Click(对象发件人,EventArgs五)
{
gethtml();
MessageBox.Show(程序结束);
}
公共无效gethtml()
{
HttpWebRequest的WebRequestObject =(HttpWebRequest的)HttpWebRequest.Create(http://msnbc.com/);
WebResponse的响应= WebRequestObject.GetResponse();
流WebStream = Response.GetResponseStream();
StreamReader的读者=新的StreamReader(WebStream);
串的WebContent = Reader.ReadToEnd();
MessageBox.Show(的WebContent);
}
}
解决方案
由于上述.Timeout说
公共无效gethtml()
{
HttpWebRequest的WebRequestObject =(HttpWebRequest的)HttpWebRequest的。创建(http://msnbc.com/);
WebRequestObject.Timeout =(System.Int32)TimeSpan.FromSeconds(2).TotalMilliseconds;
试
{
WebResponse的响应= WebRequestObject.GetResponse();
流WebStream = Response.GetResponseStream();
StreamReader的读者=新的StreamReader(WebStream);
串的WebContent = Reader.ReadToEnd();
MessageBox.Show(的WebContent);
}
赶上(System.Net.WebException E)
{
MessageBox.Show(失败);
}
}
Following program will connect to the web and get html content of "msnbc.com" webpage and print out the result. If it takes longer than 2 seconds to get data from the webpage, I want my method to stop working and return. Can you please tell me how can I do this with an example?
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
gethtml();
MessageBox.Show("End of program");
}
public void gethtml()
{
HttpWebRequest WebRequestObject = (HttpWebRequest)HttpWebRequest.Create("http://msnbc.com/");
WebResponse Response = WebRequestObject.GetResponse();
Stream WebStream = Response.GetResponseStream();
StreamReader Reader = new StreamReader(WebStream);
string webcontent = Reader.ReadToEnd();
MessageBox.Show(webcontent);
}
}
解决方案
As stated above .Timeout
public void gethtml()
{
HttpWebRequest WebRequestObject = (HttpWebRequest)HttpWebRequest.Create("http://msnbc.com/");
WebRequestObject.Timeout = (System.Int32)TimeSpan.FromSeconds(2).TotalMilliseconds;
try
{
WebResponse Response = WebRequestObject.GetResponse();
Stream WebStream = Response.GetResponseStream();
StreamReader Reader = new StreamReader(WebStream);
string webcontent = Reader.ReadToEnd();
MessageBox.Show(webcontent);
}
catch (System.Net.WebException E)
{
MessageBox.Show("Fail");
}
}
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