[英]how to save the webpage using c#?
如何使用C#保存网页? 我需要打开一个对话框,询问保存文件的路径。
有什么帮助吗?
这是另一种方式:
private string DownlodHTMLPage(Uri url)
{
WebResponse response = null;
Stream stream = null;
StreamReader sr = null;
try
{
HttpWebRequest hwr = (HttpWebRequest)WebRequest.Create(url);
//sometimes it doesn't work if user agent is not set
hwr.UserAgent = "Opera/9.80 (Windows NT 5.1; U; pl) Presto/2.2.15 Version/10.10";
response = hwr.GetResponse();
stream = response.GetResponseStream();
//check if content type of page is text/xxx. you can add statement for XHTML files
if (!response.ContentType.ToLower().StartsWith("text/"))
{
return null;
}
string buffer = "", line;
//get the stream reader
sr = new StreamReader(stream);
//download HTML to buffer
while ((line = sr.ReadLine()) != null)
{
buffer += line + "\r\n"; //line with new line markers
}
return buffer;
}
catch (WebException e)
{
System.Console.WriteLine("Can't download from " + url + " 'casue " + e);
return null;
}
catch (IOException e)
{
System.Console.WriteLine("Can't download from " + url + " 'cause " + e);
return null;
}
finally
{
if (sr != null)
sr.Close();
if (stream != null)
stream.Close();
if (response != null)
response.Close();
}
}
编辑
回答评论中的问题Ranjana。 上面的方法只是下载一个网页并以字符串形式返回。 您稍后使用StreamWriter保存它:
StreamWriter writer = new StreamWriter(PATH_TO_FILE, false, Encoding.UTF8);
writer.Write(DownlodHTMLPage(uri));
您可以使用SaveFileDialog获得的文件路径,例如:
SaveFileDialog dialog = new SaveFileDialog();
if (dialog.ShowDialog() == DialogResult.OK)
{
string file = dialog.FileName;
//rest of the code comes here
}
我希望这就是您要的。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.