在这个字符串中存在数字li标签。我想获得标签的href属性，例如：
http://bipardeh94.blogfa.com" target="_blank
http://avaejam.blogfa.com" target="_blank
和...... 我希望用C＃做到这一点。如何做到这一点？ 我使用此代码但这并不完整。
int indexStartUl = _codeHtml.IndexOf("<ul");
int indexEndUl = _codeHtml.IndexOf("</ul>");
_codeHtml = _codeHtml.Substring(indexStartUl, indexEndUl);
请帮忙。
<ul class="ull">
<li><a href="http://bipardeh94.blogfa.com" target="_blank">باغ بلور</a><span class="ur">bipardeh94.blogfa.com</span><span class="ds">فرهنگی-خبری-علمی</span></li>
<li><a href="http://avaejam.blogfa.com" target="_blank">هزار نکته </a><span class="ur">avaejam.blogfa.com</span><span class="ds"> يك نكته از هزار نكته باشد تا بعد </span></li>
<li><a href="http://prkangavar.blogfa.com" target="_blank">روابط عمومی دانشگاه آزاداسلامی کنگاور</a><span class="ur">prkangavar.blogfa.com</span><span class="ds">اخبار دانشگاه</span></li>
<li><a href="http://bordekhoun.blogfa.com" target="_blank">وبلاگ اطلاع رسانی بردخون</a><span class="ur">bordekhoun.blogfa.com</span><span class="ds">اخباروگزارشات وتحلیل ها درباره بردخون</span></li>
<li><a href="http://mahinvare.blogfa.com" target="_blank">تدوری های نوین</a><span class="ur">mahinvare.blogfa.com</span><span class="ds">نظریه های علوم انسانی باید متحول شود</span></li>
<li><a href="http://zanjanuniversity.blogfa.com" target="_blank">دانشگاه زنجان</a><span class="ur">zanjanuniversity.blogfa.com</span><span class="ds">اخبار دانشگاهیان زنجان و دانشگاه آزاد زنجان و سیستم ثبت نام شهردای زنجان </span>
</li>
</ul>
答案 0 :(得分：4)
您可以使用[indent=4]
uses
Gtk
Gst
Gee
class AudioFilesSrc : Gst.Bin
wavparse: Element
src: Element
audioconvert: Element
srcpad: Pad
sinkpad: Pad
def OnDynamicPad (element:Element, zz:Pad)
var opad = audioconvert.get_static_pad("sink");
zz.link(opad);
def open(p:Gst.Bin,mixer:Element,s1:string)
src = Gst.ElementFactory.make("filesrc", "src1");
wavparse = ElementFactory.make("wavparse","wavparse");
audioconvert = ElementFactory.make("audioconvert","audioconvert");
wavparse.pad_added.connect(OnDynamicPad);
this.add_many(src,wavparse,audioconvert);
src.link_many(wavparse,audioconvert);
src.set("location",s1);
// añade este bin a pipeline general
p.add(this)
//busca la salida de audioconvert1 y conviertela en la salida del bin
srcpad = new Gst.GhostPad("src", audioconvert.get_static_pad("src"));
this.add_pad(srcpad);
print ".-.----------------------------- abierto "+s1
def conecta(mixer:Element)
//crea una entrada al mixer
sinkpad = mixer.get_request_pad("sink_%u")
//this.get_pad("src").link(this.sinkpad)
srcpad.link(this.sinkpad)
//this.srcpad.set_blocked(false)
print ".-.----------------------------- conectado"
def close(p:Gst.Bin,mixer:Element)
p.set_state(State.PAUSED)
//this.srcpad.set_blocked(true)
this.srcpad.add_probe(PadProbeType.BLOCK, cb)
this.set_state(State.NULL)
this.srcpad.unlink(this.sinkpad)
mixer.release_request_pad (this.sinkpad)
def cb (p:Pad, info:PadProbeInfo) : PadProbeReturn
return PadProbeReturn.OK
init
Gtk.init (ref args)
Gst.init (ref args);
var prueba = new ventana ()
prueba.show_all ()
Gtk.main ();
class ventana : Window
drawing_area:private DrawingArea;
videopipeline: private Pipeline ;
recordbin: Gst.Bin
videobin: Gst.Bin
audiobin: Gst.Bin
volume: private Element ;
videosrc :private Element;
videosink: private Element;
videodec: private Element;
vaudiosink: private Element;
vaudioparser: Element;
vaudiodec: Element;
vaudioadder: private Element;
vaudioarchivos:list of AudioFilesSrc
recordsrc :private Element;
recordsink: private Element;
recordconvert: private Element;
recordencoder: private Element;
comienzo_grabacion:float
xid :private ulong ;
reloj:uint
position: float
duracion:float
bus:Gst.Bus
bus2:Gst.Bus
msg:Gst.Message
msg2:Gst.Message
seek_enabled:bool
seek_enabled2:bool
scale_1:Scale
estado:string
lugar:int
numgrab:int=0
archivos_audio:list of string
button:Button
button1:Button
button2:Button
button3:Button
button4:Button
button5:Button
button6:Button
button7:Button
button8:Button
init
reloj = Timeout.add(1000, mover)
title = "Bikoizketa"
default_height = 250
default_width = 450
window_position = WindowPosition.CENTER
comienzo_grabacion=-1
// video pipeline
duracion=Gst.CLOCK_TIME_NONE;
this.videopipeline = new Pipeline ("mypipeline");
videobin= new Gst.Bin("videobin")
this.videosrc = ElementFactory.make ("filesrc", "filesrc2")
this.videosrc.set("location","gontzal3.mp4");
this.videodec = ElementFactory.make ("decodebin", "dec");
this.videosink = ElementFactory.make ("xvimagesink", "videosink");
this.videosink.set("force-aspect-ratio",true)
this.videodec.pad_added.connect(OnDynamicPad);
this.videobin.add_many (videosrc,videodec,videosink)
this.videosrc.link_many (videodec,videosink)
this.videopipeline.add(videobin)
this.audiobin= new Gst.Bin("audiobin")
this.vaudioadder = ElementFactory.make("adder","mixer");
this.volume= ElementFactory.make("volume","volume");
this.volume.set_property("volume",0.5)
// creamos un elemento de autoaudiosink (en lugar de alsaaudiosink)
this.vaudiosink= ElementFactory.make("autoaudiosink","autoaudiosink");
this.audiobin.add_many (vaudioadder,volume,vaudiosink)
vaudioadder.link_many(volume,vaudiosink)
this.videopipeline.add(audiobin)
//añadiendo archivos
vaudioarchivos=new list of AudioFilesSrc
vaudioarchivos.add (new AudioFilesSrc())
vaudioarchivos.last().open(audiobin,vaudioadder,"silencio.wav")
vaudioarchivos.last().conecta(vaudioadder)
numgrab++
this.recordbin= new Gst.Bin("recorder")
// creamos un elemento de autoaudiosrc (en lugar de alsaaudiosrc)
this.recordsrc= ElementFactory.make ("autoaudiosrc","autoaudiosrc")
this.recordconvert=ElementFactory.make ("audioconvert","audioconvert")
this.recordencoder = Gst.ElementFactory.make("wavenc", "encoder")
this.recordsink= ElementFactory.make ("filesink","filesink")
this.recordsink.set ("location","file.wav")
this.recordbin.add_many (this.recordsrc,this.recordconvert, this.recordencoder, this.recordsink);
this.recordsrc.link_many(this.recordconvert,recordencoder,recordsink)
//videopipeline.add(recordbin)
// creamos un boton con la siguiente etiqueta
button = new Button.with_label ("grabar")
button2 = new Button.with_label ("parar")
button3 = new Button.with_label ("play")
button4 = new Button.with_label ("pausar")
var box= new Box (Gtk.Orientation.HORIZONTAL, 4)
var box1= new Box (Gtk.Orientation.HORIZONTAL, 4)
var box2= new Box (Gtk.Orientation.VERTICAL, 4)
scale_1= new Scale.with_range (Orientation.HORIZONTAL,0,1000,0.1)
scale_1.value_changed.connect(on_scale)
this.drawing_area = new DrawingArea ();
this.drawing_area.realize.connect(on_realize);
// Une el evento de clic de raton con la funcion pulsado
button.clicked.connect (on_grabar)
button2.clicked.connect (on_parar)
button4.clicked.connect (on_pausa)
button3.clicked.connect (on_play)
// si pulsamos la x de la barra saldrá del loop
destroy.connect(Gtk.main_quit)
// añade el boton a la ventana
this.add(box2)
box.add(button3)
box.add(button2)
box.add(button4)
box.add(button)
box2.pack_start (drawing_area, true, true, 0);
box2.pack_start (box,false, false, 0);
box2.pack_start (scale_1,false, true, 0);
estado="STOP"
bus = this.videopipeline.get_bus()
bus.add_signal_watch()
msg = bus.timed_pop_filtered (10,Gst.MessageType.STATE_CHANGED | Gst.MessageType.ERROR | Gst.MessageType.EOS );
bus.message.connect(on_msg)
def on_msg(m:Gst.Message)
if m.type== Gst.MessageType.STATE_CHANGED
old_state:Gst.State;
new_state:Gst.State;
pending_state:Gst.State;
m.parse_state_changed (out old_state, out new_state, out pending_state);
if (m.src == this.videosink)
// Remember whether we are in the PLAYING state or not:
if (new_state == Gst.State.PLAYING)
q : Gst.Query = new Gst.Query.seeking (Gst.Format.TIME);
start:int64;
end:int64;
if ( this.videosink.query (q) )
q.parse_seeking (null, out this.seek_enabled, out start, out end);
if seek_enabled
pass
if (new_state == Gst.State.READY)
//print "STOP"
pass
if (new_state == Gst.State.PAUSED)
print "PAUSE"
q : Gst.Query = new Gst.Query.seeking (Gst.Format.TIME);
start:int64;
end:int64;
if ( this.videosink.query (q) )
q.parse_seeking (null, out this.seek_enabled, out start, out end);
if seek_enabled
//print "enable cuando pause"+start.to_string()+"-"+end.to_string()
pass
def on_scale( )//cuando la escala se mueve por el usuario
if seek_enabled
if this.videopipeline.seek_simple(Gst.Format.TIME, SeekFlags.FLUSH| Gst.SeekFlags.ACCURATE, (int64)(scale_1.get_value()*Gst.SECOND))
print "moviendo video"
else
print "video no se puede mover"
def mover():bool // cambiando el valor mientras play el video.
//desconectamos la deteccion de valores cambiados de la escala para evitar que el programa crea que el usuario esta cambiando el valor.
scale_1.value_changed.disconnect(on_scale)
var format = Gst.Format.TIME
position=0
if this.videopipeline.query_position(format, out position)
scale_1.set_value(position/Gst.MSECOND/1000)
duracion=0;
if this.videopipeline.query_duration(format, out duracion)
duracion=duracion >= 0 ? duracion/Gst.MSECOND/1000 : 0
if estado!="STOP" do scale_1.set_range(0,duracion)
scale_1.value_changed.connect(on_scale)
return true
def on_realize()
this.xid = (ulong)((Gdk.X11.Window)this.drawing_area.get_window()).get_xid();
def on_grabar (btn : Button)
if estado=="STOP" or estado=="PAUSA"
recordsink.set("location","grabacion"+(numgrab).to_string()+".wav")
this.videopipeline.add(this.recordbin)
this.videopipeline.remove(audiobin)
print "grabando"
button.set_label("parar")
var xoverlay = this.videosink as Video.Overlay
xoverlay.set_window_handle ((uint*)this.xid);
this.videopipeline.set_state (State.PLAYING);
estado="REC"
var format = Gst.Format.TIME
position: int64
if this.videopipeline.query_position(format, out position)
comienzo_grabacion=(position/Gst.MSECOND/1000)
else
comienzo_grabacion=-1
else if estado=="REC"
//parando la grabación
estado="PLAY"
button.set_label("grabar")
videopipeline.set_state(State.PAUSED)
this.videopipeline.remove(recordbin)
this.recordbin.set_state(State.NULL)
this.recordbin.send_event(new Event.eos())
this.videopipeline.add(audiobin)
this.on_insertar()
def on_insertar()
if comienzo_grabacion!=-1
try
Process.spawn_command_line_sync ("sox grabacion"+numgrab.to_string()+".wav grabacion_x.wav pad "+((int64)comienzo_grabacion).to_string()+"@0")
Process.spawn_command_line_sync ("mv grabacion_x.wav grabacion"+numgrab.to_string()+".wav")
except err:Error
print err.message
print "grabacion a añadir :"+numgrab.to_string()
vaudioarchivos.add((new AudioFilesSrc()))
vaudioarchivos.last().open(this.audiobin,this.vaudioadder,"grabacion"+numgrab.to_string()+".wav")
vaudioarchivos.last().conecta(this.vaudioadder)
numgrab+=1
def on_pausa (btn:Button)
if estado=="PLAY"
print "pausando"
this.videopipeline.set_state (State.PAUSED);
estado="PAUSA"
def on_parar (btn : Button)
if estado=="PLAY" or estado=="PAUSA"
var xoverlay = this.videosink as Video.Overlay
xoverlay.set_window_handle ((uint*)this.xid);
this.videopipeline.set_state (State.READY);
this.scale_1.set_value(0)
estado="STOP"
def on_play (btn : Button)
if estado=="STOP" or estado=="PAUSA"
print "tocando"
var xoverlay = this.videosink as Video.Overlay
xoverlay.set_window_handle ((uint*)this.xid);
this.videopipeline.set_state (State.PLAYING);
estado="PLAY"
def OnDynamicPad (element:Element, zz:Pad)
var opad = this.videosink.get_static_pad("sink");
zz.link(opad);
Selenium功能：
WebDriver您会找到IList<IWebElement> lis = driver.FindElements(By.CssSelector(".ull > li"));
foreach (IWebElement li in lis) {
string href = li.GetAttribute("href");
}
个WebElements标记的所有li标记为WebElement的子类ull，以及列表中的迭代并获取href属性。
答案 1 :(得分：3)
您可以使用Html Agility Pack
Html Agility Pack示例：
HtmlDocument doc = new HtmlDocument();
doc.Load("file.htm");
foreach(HtmlNode link in doc.DocumentElement.SelectNodes("//a[@href"])
{
HtmlAttribute att = link["href"];
att.Value = FixLink(att);
}
doc.Save("file.htm");
链接：
http://www.mikesdotnetting.com/article/273/using-the-htmlagilitypack-to-parse-html-in-asp-net http://www.codeproject.com/Articles/691119/Html-Agility-Pack-Massive-information-extraction-f
我希望这些信息能够提供帮助
答案 2 :(得分：1)
为了更好地理解
子字符串（A，B）
在你的前任中你采取：
作为ul的起始索引
b作为ul的结束索引//错误b将是从字符串开始到结束的长度！
你需要做的是：
int c = b - a // (will give you the inner text length)
_codeHtml = _codeHtml.Substring(a,c);
答案 3 :(得分：0)
没有任何外部库或工具，请使用以下行：
var hrefs = html.Split(new[] { "href='" }, StringSplitOptions.RemoveEmptyEntries).Where(o => o.StartsWith("http")).Select(o => o.Substring(0, o.IndexOf("'")));
将为您提供包含所有href的数组，如下所示：
http://bipardeh94.blogfa.com
http://avaejam.blogfa.com
http://prkangavar.blogfa.com
http://bordekhoun.blogfa.com
http://mahinvare.blogfa.com
http://zanjanuniversity.blogfa.com
完整示例：this .net fiddle