以下程序将连接到网络并获取“msnbc.com”网页的html内容并打印出结果.如果从网页获取数据需要的时间超过2秒,我希望我的方法停止工作并返回.你能告诉我如何用一个例子来做这件事吗？
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);
}
}
解决方法
如上所述.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");
}
}
