我正在尝试自动登录到第三方网站并使用网络表单中的C＃，mshtml dll和SHDocVw.dll来获取数据。
我可以登录，填写文本框，单击按钮，导航到新页面。我正在使用getelementbyid方法获取上述控件的详细信息以执行操作。
在使用getelementbytagname时，它没有提取任何数据。
元素，元素1，元素2为黑色。即使html具有这些标记和标记ID，也不会填充任何值。
以下是代码：
SHDocVw.InternetExplorer ie = new
SHDocVw.InternetExplorerClass();
SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)ie;
object nullObject = null;
wb.Visible = true;
wb.Navigate("url", ref nullObject, ref nullObject, ref nullObject, ref
nullObject);
while (wb.Busy) { Thread.Sleep(100); }
HTMLDocument document = ((HTMLDocument)wb.Document);
IHTMLElement element = document.getElementById("username");
HTMLInputElementClass email = (HTMLInputElementClass)element;
email.value = "abc";
email = null;
element = document.getElementById("password");
HTMLInputElementClass pass = (HTMLInputElementClass)element;
pass.value = "Admin123";
pass = null;
element = document.getElementById("btnSubmit_6");
HTMLInputElementClass subm = (HTMLInputElementClass)element;
subm.click();
subm = null;
wb.Navigate("url1");
wb.Navigate("url2");
element = document.getElementById("action_46");
HTMLInputElementClass Cont = (HTMLInputElementClass)element;
Cont.click();
Cont = null;
wb.Navigate("url3");
element = document.getElementById("username_53");
HTMLInputElementClass login = (HTMLInputElementClass)element;
login.value = "abc";
login = null;
element = document.getElementById("password_50");
HTMLInputElementClass passwd = (HTMLInputElementClass)element;
passwd.value = "abcd";
passwd = null;
element = document.getElementById("userDomain_2");
HTMLInputElementClass domain = (HTMLInputElementClass)element;
domain.value = "abc";
domain = null;
element = document.getElementById("action_49");
HTMLInputElementClass submt = (HTMLInputElementClass)element;
submt.click();
submt = null;
wb.Navigate("url4");
//Select Node
IHTMLElementCollection elements = document.getElementsByTagName("div");
IHTMLElementCollection elements1 = document.getElementsByTagName("//div[@id='postB']");
IHTMLElementCollection elements2 = (IHTMLElementCollection)document.getElementById("postB");
请找到我想要检索的HTML代码。 id postA有很多标签。我需要获取所有标签并在标签和显示内容中搜索文本。或者有什么方法可以在整个html页面中搜索特定文本吗？
<DIV id="postA">[Aug 01 09h43:20.934] - <a href="javascript://"
onClick="toggle(this)">Message from 18998652 [161.126.169.35,3878]</a>
<DIV id="postB"><UL>
<PRE format=object>1420:
[LLVAR n ..19 019] 002 [7077186160620160159]
[Fixed n 6 006] 003 [000000]
[None n 012] 004 [000000160000]
[Fixed n 6 006] 011 [040174]
[Fixed n 12 012] 012 [170801114140]
[Fixed n 4 004] 014 [1906]
[Fixed n 3 003] 024 [400]
[Fixed n 4 004] 025 [4000]
[Fixed ans 6 006] 038 [477762]
[Fixed n 3 003] 039 [000]
[Fixed ans 8 008] 041 [18998652]
[Fixed ans 15 015] 042 [189986 ]
[LLVAR ans ..99 040] 043 [Shell\NL Unmanned 80998\Netherlands \NL]
[LLLVAR b ..999 041] 048
[Fixed a 2 002] 003 [EN]
[Fixed n 10 010] 004 [0000000231]
[Fixed ans 2 002] 014 [23]
</PRE format=object><DIV id="postC"><a href="javascript://"
onClick="toggle(this)">binary data</a>
<DIV id="postD"><UL><PRE format=object>
0000(0000) 31 34 32 30 70 34 01 80 06 e1 89 01 31 39 37 30
1420p4......1970
</PRE format=object></UL></DIV></DIV>
</UL><HR></DIV>
</DIV>
<!--EOM-->
<DIV id="postA">[Aug 01 09h43:20.953] - <a href="javascript://"
onClick="toggle(this)"><0420> Message to Transaction Manager
[10.104.15.12,4008]</a>
<DIV id="postB"><UL>
<PRE format=object>0420:
[LLVAR n ..19 019] 002 [7077186160620160159]
[Fixed n 6 006] 003 [000000]
[None n 012] 004 [000000160000]
[Fixed n 10 010] 007 [0801094320]
[Fixed n 6 006] 011 [040174]
[Fixed n 6 006] 012 [114140]
[Fixed n 4 004] 013 [0801]
[Fixed n 4 004] 014 [1906]
[Fixed n 3 003] 022 [000]
[Fixed n 2 002] 025 [00]
[Fixed n 2 002] 026 [12]
[LLVAR n ..11 003] 032 [528]
[Fixed ans 6 006] 038 [477762]
[Fixed ans 8 008] 041 [18998652]
[Fixed ans 15 015] 042 [NL9986000000000]
[Fixed ans 40 040] 043 [Shell NL Unmanned 80998Netherlands NLNL]
[Fixed a/n 3 003] 049 [978]
[LLLVAR n 4 004] 056 [4000]
[LLLVAR ans ..500 266] 059 [0000000231
</PRE format=object><DIV id="postC"><a href="javascript://"
onClick="toggle(this)">binary data</a>
答案 0 :(得分：0)
static void Main(string[] args)
{
//Start IE with google url
Process.Start("iexplore", "www.google.com");
//Wait for page load. This can be avoided but that will extra code
Thread.Sleep(5000);
InternetExplorer IEGoogle=null;
HTMLDocument htmlGoogle;
//Getting InternetExplorer from all open windows
SHDocVw.ShellWindows shellWindows = new SHDocVw.ShellWindows(); shellWindows = new SHDocVw.ShellWindows();
foreach (InternetExplorer browser in shellWindows )
{
if(browser.LocationURL.ToLower().Contains("www.google.com"))
{
IEGoogle = browser;
break;
}
}
if(IEGoogle!=null)
{
//Get HTML content in HTMLDocument from InternetExplorer object
htmlGoogle = IEGoogle.Document;
//Open google.com and Using Developer tools(Press F12) and see the details of searchbox on google.com. I have found that name property of searchbox is unique.
HTMLInputElement searchbox = htmlGoogle.getElementsByName("q").item() as HTMLInputElement;
if (searchbox != null)
{
searchbox.value = "First Way Oxford Library";
}
Console.ReadLine();
//Alternate way
var inputElements = htmlGoogle.getElementsByTagName("input");
if(inputElements!=null)
{
foreach(HTMLInputElement googleSearch in inputElements)
{
if (googleSearch != null)
{
if (googleSearch.name != null)
{
if (googleSearch.name.Equals("q"))
{
googleSearch.value = " Second Way Oxford Library";
}
}
}
}
}
}
}