设置控件的值
/// <summary>
/// 根据ID,NAME双重判断并设置值
/// </summary>
/// <param name="tagName"></param>
/// <param name="id"></param>
/// <param name="value"></param>
private void SetTxt(string tagName, string name, string id, string value)
{
HtmlDocument docx = <strong><font color="#FF0000">webBrowser</font></strong>1.Document;
foreach (HtmlElement item in docx.GetElementsByTagName(tagName))
{
if (item.GetAttribute("name") != null && item.GetAttribute("name") == name || item.Id == id)
{
try
{
item.Focus();
item.SetAttribute("value", value);
}
catch
{
item.SetAttribute("value", value);
}
}
}
}
返回指定WebBrowser中图片<IMG></IMG>中的图内容 需要引用MsHtml
/// <summary>
/// 返回指定WebBrowser中图片<IMG></IMG>中的图内容
/// </summary>
/// <param name="WebCtl">WebBrowser控件</param>
/// <param name="ImgeTag">IMG元素</param>
/// <returns>IMG对象</returns>
private Image GetWebImage(WebBrowser WebCtl, HtmlElement ImgeTag)
{
HTMLDocument doc = (HTMLDocument)WebCtl.Document.DomDocument;
HTMLBody body = (HTMLBody)doc.body;
IHTMLControlRange rang = (IHTMLControlRange)body.createControlRange();
IHTMLControlElement Img = (IHTMLControlElement)ImgeTag.DomElement; //图片地址
Image oldImage = Clipboard.GetImage();
rang.add(Img);
rang.execCommand("Copy", false, null); //拷贝到内存
Image numImage = Clipboard.GetImage();
try
{
Clipboard.SetImage(oldImage);
}
catch { }
return numImage;
}
一个通用webbrowser类,封装常用方法
public partial class htmlElement
{
//根据Name获取元素
public HtmlElement GetElement_Name(WebBrowser wb, string Name)
{
HtmlElement e = wb.Document.All[Name];
return e;
}
//根据Id获取元素
public HtmlElement GetElement_Id(WebBrowser wb, string id)
{
HtmlElement e = wb.Document.GetElementById(id);
return e;
}
//根据Index获取元素
public HtmlElement GetElement_Index(WebBrowser wb, int index)
{
HtmlElement e = wb.Document.All[index];
return e;
}
// 据Type获取元 ,在没有NAME和ID的情况下使用
public HtmlElement GetElement_Type(WebBrowser wb, string type)
{
HtmlElement e = null;
HtmlElementCollection elements = wb.Document.GetElementsByTagName("input");
foreach (HtmlElement element in elements)
{
if (element.GetAttribute("type") == type)
{
e = element;
}
}
return e;
}
// 据Type获取元 ,在没有NAME和ID的情况下使用,并指定是同类type的第 个,GetElement_Type()升级版
public HtmlElement GetElement_Type_No(WebBrowser wb, string type, int i)
{
int j = 1;
HtmlElement e = null;
HtmlElementCollection elements = wb.Document.GetElementsByTagName("input");
foreach (HtmlElement element in elements)
{
if (element.GetAttribute("type") == type)
{
if (j == i)
{
e = element;
}
j++;
}
}
return e;
}
//获取form表单名name,返回表单
public HtmlElement GetElement_Form(WebBrowser wb, string form_name)
{
HtmlElement e = wb.Document.Forms[form_name];
return e;
}
//设置元素value属性的值
public void Write_value(HtmlElement e, string value)
{
e.SetAttribute("value", value);
}
//执行元素的方法,如:click,submit(需Form表单名)等
public void Btn_click(HtmlElement e, string s)
{
e.InvokeMember(s);
}
}
多线程执行webbrowser的方法:
webbrowser 只支持STA模式
private void ThreadWebBrowser(string url)
{
Thread tread = new Thread(new ParameterizedThreadStart(BeginCatch));
tread.SetApartmentState(ApartmentState.STA);//注意创建的线程单元
tread.Start(url);
}
private void BeginCatch(object obj)
{
string url = obj.ToString();
WebBrowser wb = new WebBrowser();
wb.ScriptErrorsSuppressed = true;
//在这里Navigate一个空白页面 必须
wb.Navigate("about:blank");
string htmlcode = "";//这里赋值 HTML字符串数据
wb.Document.Write(htmlcode);
//执行其他操作
}
原文:https://www.cnblogs.com/soundcode/p/14772005.html