webbrowser 操作网页的几种方法
public static class WebManager
{
/// <summary>
/// 根据控件ID获取控件对象
/// </summary>
/// <param name="web">web对象</param>
/// <param name="id">控件ID</param>
/// <returns>对应ID的控件对象</returns>
private static HtmlElement GetHtmlElementByID(WebBrowser web, string id)
{
return web.Document.GetElementById(id);
}
/// <summary>
/// 根据控件标签，和Name获取控件对象
/// </summary>
/// <param name="web">web对象</param>
/// <param name="label">控件标签</param>
/// <param name="labelName">控件Name</param>
/// <returns>对应控件标签，及Name的控件对象</returns>
private static HtmlElement GetHtmlElementByName(WebBrowser web, string label, string labelName)
{
var IEnumerator = web.Document.GetElementsByTagName(label).GetElementsByName(labelName).GetEnumerator();
IEnumerator.MoveNext();
return (HtmlElement)IEnumerator.Current;
}
/// <summary>
/// 根据控件标签，和控件文本获取控件对象
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="txt"></param>
/// <returns></returns>
private static HtmlElement GetHtmlElementByTxt(WebBrowser web, string label, string txt)
{
int i = 0;
HtmlElement element = null;
var IEnumerator = web.Document.GetElementsByTagName(label).GetEnumerator();
while (IEnumerator.MoveNext())
{
element = (HtmlElement)IEnumerator.Current;
if (element.OuterText == txt)
{
i = 1;
break;
}
}
if (i == 1)
{
element.InvokeMember("click");
return element;
}
return element;
}
/// <summary>
/// 点击指定控件标签及标签Name的按钮
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="labelName"></param>
public static void ClickBtnByName(WebBrowser web, string label, string labelName)
{
GetHtmlElementByName(web, label, labelName).InvokeMember("click");
}
/// <summary>
/// 点击指定控件ID的按钮
/// </summary>
/// <param name="web"></param>
/// <param name="id"></param>
public static void ClickBtnByID(WebBrowser web, string id)
{
GetHtmlElementByID(web, id).InvokeMember("click");
}
public static bool ClickBtnByTxt(WebBrowser web, string label, string txt)
{
HtmlElement btn = GetHtmlElementByTxt(web, label, txt);
if (btn == null)
{
return false;
}
btn.InvokeMember("click");
return true;
}
public static void SetTextByName(WebBrowser web, string label, string labelName, string value)
{
GetHtmlElementByName(web, label, labelName).SetAttribute("value", value);
}
public static void SetTextByID(WebBrowser web, string id, string value)
{
GetHtmlElementByID(web, id).SetAttribute("value", value);
}
/// <summary>
/// 获取图像ID
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="id"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static Image GetChangeImgByID(WebBrowser web, string label, string id, int width, int height)
{
Image img = null;
HtmlElement he = GetHtmlElementByID(web, id);
if (he != null)
{
he.Style = "position: absolute; z-index: 9999; top: 0px; left: 0px";
var b = new Bitmap(width, height);
web.DrawToBitmap(b, new Rectangle(new Point(), new Size(width, height)));
img = b;
}
return img;
}
/// <summary>
/// 获取图像name
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="name"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static Image GetChangeImgByName(WebBrowser web, string label, string name, int width, int height)
{
Image img = null;
HtmlElement he = GetHtmlElementByName(web, label, name);
if (he != null)
{
he.Style = "position: absolute; z-index: 9999; top: 0px; left: 0px";
var b = new Bitmap(width, height);
web.DrawToBitmap(b, new Rectangle(new Point(), new Size(width, height)));
img = b;
}
return img;
}
/// <summary>
/// 获取图像src
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="width"></param>
/// <param name="height"></param>
//public static Image GetChangeImgBySrc(WebBrowser web, string label, string src, int width, int height)
//{
// var va = web.Document.GetElementsByTagName(label).GetEnumerator();
// Image img = null;
// while (va.MoveNext())
// {
// HtmlElement he = va.Current as HtmlElement;
// if (he.GetAttribute("src").Contains(src))
// {
// Console.WriteLine(he.ScrollLeft + "-" + he.ScrollTop + "-" + he.OffsetRectangle.X + "-" + he.OffsetRectangle.Y);
// he.Style = "position: absolute; z-index: 9999; top: 0px; left: 0px";
// web.Select();
// var b = new Bitmap(width, height);
// web.DrawToBitmap(b, new Rectangle(new Point(), new Size(width, height)));
// img = b;
// Console.WriteLine(he.ScrollLeft + "-" + he.ScrollTop + "-" + he.OffsetRectangle.X + "-" + he.OffsetRectangle.Y);
// break;
// }
// }
// return img;
//}
/// <summary>
/// 获取图像src
/// </summary>
/// <param name="web"></param>
/// <param name="label"></param>
/// <param name="src"></param>
/// <returns></returns>
public static HtmlElement GetChangeImgBySrc(WebBrowser web, string label, string src)
{
var va = web.Document.GetElementsByTagName("img").GetEnumerator();
while (va.MoveNext())
{
HtmlElement he = va.Current as HtmlElement;
if (he.GetAttribute("src").Contains(src))
{
return he;
}
}
return null;
}
}
