Andy Arismendi 提供的脚本真是太棒了！
我用它做了一个有趣的项目 - 从网络上随机设置壁纸。
我在这里发布给任何感兴趣的人。在使用之前，您需要更改脚本源代码顶部的一些常量。您还需要下载 HtmlAgilityPack.dll 库（脚本注释中有说明）。
享受吧！
P.S. 如果我使用的壁纸网站关闭或更改其布局，则脚本中的抓取将失败，但是即使如此，通过我的脚本示例，我敢打赌您也能构建另一个壁纸抓取器。
$html_parser_path = "C:\Users\username\Documents\htmlagilitypack\HtmlAgilityPack.1.4.9.5\lib\Net20\HtmlAgilityPack.dll"
$wallpaper_dir_path = "C:\Users\username\Pictures\"
$categories = @("animals","flowers","macro","nature","space")
$resolution = "1920x1080"
$url = "https://wallpaperscraft.com/catalog/category/$resolution"
Add-Type @"
using System;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace Wallpaper
{
public enum Style : int
{
Tile, Center, Stretch, NoChange
}
public class Setter {
public const int SetDesktopWallpaper = 20;
public const int UpdateIniFile = 0x01;
public const int SendWinIniChange = 0x02;
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern int SystemParametersInfo (int uAction, int uParam, string lpvParam, int fuWinIni);
public static void SetWallpaper ( string path, Wallpaper.Style style ) {
SystemParametersInfo( SetDesktopWallpaper, 0, path, UpdateIniFile | SendWinIniChange );
RegistryKey key = Registry.CurrentUser.OpenSubKey("Control Panel\\Desktop", true);
switch( style )
{
case Style.Stretch :
key.SetValue(@"WallpaperStyle", "2") ;
key.SetValue(@"TileWallpaper", "0") ;
break;
case Style.Center :
key.SetValue(@"WallpaperStyle", "1") ;
key.SetValue(@"TileWallpaper", "0") ;
break;
case Style.Tile :
key.SetValue(@"WallpaperStyle", "1") ;
key.SetValue(@"TileWallpaper", "1") ;
break;
case Style.NoChange :
break;
}
key.Close();
}
}
}
"@
Add-Type -Path $html_parser_path
$rand_index = Get-Random -minimum 0 -maximum $categories.Length
$random_category = $categories[$rand_index]
$url = $url -replace "category", $random_category
$doc = New-Object HtmlAgilityPack.HtmlDocument
$doc.LoadHtml((New-Object System.Net.WebClient).DownloadString($url))
$page_links = $doc.DocumentNode.SelectSingleNode("//div[contains(@class, 'pages')]").SelectNodes("a")
$last_page_link = $page_links[$page_links.Count - 1].GetAttributeValue("href", "")
$last_page_number = [regex]::match($last_page_link,'.*page(\d+)').Groups[1].Value
$random_page_number = Get-Random -minimum 0 -maximum $last_page_number
$random_page_addr = ""
if ($random_page_number -gt 0){
$random_page_addr = "/page$random_page_number"
}
$doc.LoadHtml((New-Object System.Net.WebClient).DownloadString("$url$random_page_addr"))
$wallpaper_divs = $doc.DocumentNode.SelectNodes("//div[contains(@class, 'wallpaper_pre')]")
$random_wallpaper_div = Get-Random -minimum 0 -maximum 15
$sample_wallpaper_link = $wallpaper_divs[$random_wallpaper_div].SelectNodes("a")[0].GetAttributeValue("href", "")
$sample_wallpaper_link = $sample_wallpaper_link -replace "download", "image"
$sample_wallpaper_link = $sample_wallpaper_link -replace "/$resolution", "_$resolution.jpg"
$sample_wallpaper_link = $sample_wallpaper_link -replace "//", "https://"
$wallpaper_image_name = [regex]::match($sample_wallpaper_link,'.*image/(\w+)').Groups[1].Value
$wallpaper_image_name = "$wallpaper_image_name.jpg"
$wc = New-Object System.Net.WebClient
$save_location = "$wallpaper_dir_path$wallpaper_image_name"
$wc.DownloadFile($sample_wallpaper_link, "$save_location")
[Wallpaper.Setter]::SetWallpaper($save_location, 1 )
