【三】C# 基于WPF 使用CefSharp来做万能爬虫
目录
【一】C# 基于WPF 使用CefSharp来做万能爬虫
【二】C# 基于WPF 使用CefSharp来做万能爬虫
【三】C# 基于WPF 使用CefSharp来做万能爬虫
【四】C# 基于WPF 使用CefSharp来做万能爬虫---扩展 一个httpClient访问辅助类可设置代理
分享一个对CefSharpWebrowser的操作类
using CefSharp;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ChromeControler
{
///
/// 对CefSharpWebBrowser的操作类
///
public static class CefWebBrowserControl
{
///
/// 获取html内容
///
/// CefSharp的webbrowser
/// GetHtmlSource(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser)
{
string htmlStr = string.Empty;
await chromiumWebBrowser.GetSourceAsync().ContinueWith(taskHtml =>
{
htmlStr = taskHtml.Result;
});
return htmlStr;
}
///
/// 给input赋值
///
/// CefSharp的webbrowser
/// 根据id
public static string SetValueById(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser, string id,string value)
{
if (id.Length > 0)
{
string js = @"(
function()
{
var ele= document.getElementById('" + id + @"');
if(ele!=null)
{
ele.value='"+value+@"';
}
}
)()";
ExecuteJs(chromiumWebBrowser, js);
return "赋值成功";
}
else
return "id不能为空";
}
///
/// 给Input赋值
///
/// CefSharp的webbrowser
/// 根据控件的名称
/// 内部html包含***
/// 外部html包含***
public static string SetValueByName(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser, string name,string value, SearchType searchType = SearchType.ControlName, string innerHtml = "", string outHtml = "")
{
string js = string.Empty;
string forStr = string.Empty;
if (name.Length > 0)
{
if (innerHtml.Length > 0)
{
forStr = "if(eleAug[i].innerText.indexOf('" + innerHtml + "') != -1) ";
}
if (outHtml.Length > 0)
{
forStr = "if(eleAug[i].outerText.indexOf('" + outHtml + "') != -1) ";
}
string searchjs = string.Empty;
switch (searchType)
{
case SearchType.ControlName: { searchjs = " var eleAug= document.getElementsByName('" + name + @"');"; } break;
case SearchType.ClassName: { searchjs = " var eleAug= document.getElementsByClassName('" + name + @"');"; } break;
case SearchType.TagName: { searchjs = " var eleAug= document.getElementsByTagName('" + name + @"');"; } break;
}
js = @"(
function()
{
" + searchjs + @"
if(eleAug!=null)
{
for(var i=0;i< eleAug.length;i++)
{
" + forStr + @"
{ ele.value='" + value + @"';}
}
}
}
)()";
}
else
{
return "名称不能为空";
}
ExecuteJs(chromiumWebBrowser, js);
return "点击成功";
}
///
/// 点击按钮
///
/// CefSharp的webbrowser
/// 根据id
public static string ClickButtonById(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser, string id)
{
if (id.Length > 0)
{
string js = @"(
function()
{
var ele= document.getElementById('" + id + @"');
if(ele!=null)
{
ele.click();
}
}
)()";
ExecuteJs(chromiumWebBrowser, js);
return "点击成功";
}
else
return "id不能为空";
}
///
/// 点击按钮
///
/// CefSharp的webbrowser
/// 根据控件的名称
/// 内部html包含***
/// 外部html包含***
public static string ClickButtonByName(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser, string name, SearchType searchType = SearchType.ControlName, string innerHtml = "", string outHtml = "")
{
string js = string.Empty;
string forStr = string.Empty;
if (name.Length > 0)
{
if (innerHtml.Length > 0)
{
forStr = "if(eleAug[i].innerText.indexOf('" + innerHtml + "') != -1) ";
}
if (outHtml.Length > 0)
{
forStr = "if(eleAug[i].outerText.indexOf('" + outHtml + "') != -1) ";
}
string searchjs = string.Empty;
switch (searchType)
{
case SearchType.ControlName: { searchjs = " var eleAug= document.getElementsByName('" + name + @"');"; } break;
case SearchType.ClassName: { searchjs = " var eleAug= document.getElementsByClassName('" + name + @"');"; } break;
case SearchType.TagName: { searchjs = " var eleAug= document.getElementsByTagName('" + name + @"');"; } break;
}
js = @"(
function()
{
" + searchjs + @"
if(eleAug!=null)
{
for(var i=0;i< eleAug.length;i++)
{
" + forStr + @"
{ eleAug[i].click();}
}
}
}
)()";
}
else
{
return "名称不能为空";
}
ExecuteJs(chromiumWebBrowser, js);
return "点击成功";
}
///
/// 执行JS
///
/// wpf版本的ChromiumWebBrowser
///
public static void ExecuteJs(CefSharp.Wpf.ChromiumWebBrowser chromiumWebBrowser, string js)
{
var frame = chromiumWebBrowser.WebBrowser.GetMainFrame();
frame.EvaluateScriptAsync(js);
}
}
public enum SearchType
{
ControlName,
ClassName,
TagName
}
}
使用示例：
CefWebBrowserControl.SetValueById(chromiumWebBrowser, "kw", "万能爬虫");
CefWebBrowserControl.ClickButtonById(chromiumWebBrowser, "su");
CefWebBrowserControl.ClickButtonByName(chromiumWebBrowser, "n", SearchType.ClassName, "下一页>");