在 C# 中更改 Windows 锁定屏幕背景图像

Question

有没有办法在c#中使用pinvoke更改锁屏图像，如墙纸。

[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern Int32 SystemParametersInfo(UInt32 action,
        UInt32 uParam, string vParam, UInt32 winIni);
private static readonly UInt32 SPI_SETDESKWALLPAPER = 20;
private static UInt32 SPIF_UPDATEINIFILE = 0x1;
private static uint MAX_PATH = 260;

// then I call
SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, file, SPIF_UPDATEINIFILE);

我想对锁屏做同样的事情（就像 Bing 桌面应用正在做的那样）

Answer 1

鉴于您的 Windows 8 标记，是的，您可以：

LockScreen.SetImageFileAsync()，如Lock screen personalization sample in C# 所示（错误处理代码省略，请查看示例）：

StorageFile imageFile = await imagePicker.PickSingleFileAsync();

// Application now has access to the picked file, setting image to lockscreen.  
// This will fail if the file is an invalid format.
await LockScreen.SetImageFileAsync(imageFile);