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如何强制更新或刷新 Windows 桌面背景

tag-icon • tag-icon windows-7 windows windows-registry
如何强制更新或刷新 Windows 桌面背景

如果我手动更改注册表中的背景图像，如何在不注销的情况下强制其刷新？

我知道背景信息可以，但我想保持简单并且不使用任何软件。

答案1

RUNDLL32.EXE USER32.DLL,UpdatePerUserSystemParameters 1, True

答案2

  • 打开任务管理器
  • 杀死explorer.exe
  • 如果 shell 没有立即重启
  • 从菜单中选择文件 > 新建任务
  • 输入“explorer.exe”并按回车键。

答案3

更改屏幕分辨率，然后选择恢复选项。分辨率将保持不变，但背景将发生变化。

或者，断开并重新连接显示屏电缆。

答案4

# first in powershell, second both. cmd.exe + powershell.exe

# Refresh Desktop Ability
$definition = @'
    [System.Runtime.InteropServices.DllImport("Shell32.dll")] 
    private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2);
    public static void Refresh() {
        SHChangeNotify(0x8000000, 0x1000, IntPtr.Zero, IntPtr.Zero);    
    }
'@
Add-Type -MemberDefinition $definition -Namespace WinAPI -Name Explorer

# Set Safe within deleted days and get physical drive letters
$ignoreDeletedWithinDays = 2
$drives = (gwmi -Class Win32_LogicalDisk | ? {$_.drivetype -eq 3}).deviceid

# Process discovered drives
$drives | % {$drive = $_
    gci -Path ($drive+'\$Recycle.Bin\*\$I*') -Recurse -Force | ? {($_.LastWriteTime -lt [datetime]::Now.AddDays(-$ignoreDeletedWithinDays)) -and ($_.name -like "`$*.*")} | % {

        # Just a few calcs
        $infoFile         = $_
        $originalFile     = gi ($drive+"\`$Recycle.Bin\*\`$R$($infoFile.Name.Substring(2))") -Force
        $originalLocation = [regex]::match([string](gc $infoFile.FullName -Force -Encoding Unicode),($drive+'[^<>:"/|?*]+\.[\w\-_\+]+')).Value
        $deletedDate      = $infoFile.LastWriteTime
        $sid              = $infoFile.FullName.split('\') | ? {$_ -like "S-1-5*"}
        $user             = try{(gpv "HKLM:\Software\Microsoft\Windows NT\CurrentVersion\ProfileList\$($sid)" -Name ProfileImagePath).replace("$(gpv 'HKLM:\Software\Microsoft\Windows NT\CurrentVersion\ProfileList' -Name ProfilesDirectory)\",'')}catch{$Sid}

        #' Various info
        $originalLocation
        $deletedDate
        $user
        $sid
        $infoFile.Fullname
        ((gi $infoFile -force).length / 1mb).ToString('0.00MB')
        $originalFile.fullname
        ((gi $originalFile -force).length / 1mb).ToString('0.00MB')
        ""

        # Blow it all Away
        #ri $InfoFile -Recurse -Force -Confirm:$false -WhatIf
        #ri $OriginalFile -Recurse -Force -Confirm:$false- WhatIf
        # remove comment before two lines above and the '-WhatIf' statement to delete files
    }
}

# Refresh desktop icons
[WinAPI.Explorer]::Refresh()

or 

ie4uinit.exe -ClearIconCache

end scripting enjoy.
#end

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