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Code Issues Releases Wiki Activity

Added GetSystemIcon overload that uses an index and optimized methods.

pull/180/head
dahall 2020-10-28 22:40:36 -06:00
parent 00fe9c4ed2
commit f48bd1acba
1 changed files with 16 additions and 4 deletions
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20
Windows.Shell/ShellImageList.cs
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@ -29,6 +29,8 @@ namespace Vanara.Windows.Shell
/// <summary>Represents the System Image List holding images for all shell icons.</summary>
public static class ShellImageList
{
private static HIMAGELIST hSystemImageList;
/// <summary>Gets the system icon for the given file name or extension.</summary>
/// <param name="fileNameOrExtension">The file name or extension.</param>
/// <param name="iconSize">Size of the icon.</param>
@ -36,12 +38,22 @@ namespace Vanara.Windows.Shell
public static Icon GetSystemIcon(string fileNameOrExtension, ShellImageSize iconSize = ShellImageSize.Large)
{
var shfi = new SHFILEINFO();
var hImageList = (HIMAGELIST)SHGetFileInfo(fileNameOrExtension, 0, ref shfi, SHFILEINFO.Size, SHGFI.SHGFI_SYSICONINDEX | (iconSize == ShellImageSize.Small ? SHGFI.SHGFI_SMALLICON : 0));
if (hImageList.IsNull) return null;
if (hSystemImageList.IsNull)
hSystemImageList = SHGetFileInfo(fileNameOrExtension, 0, ref shfi, SHFILEINFO.Size, SHGFI.SHGFI_SYSICONINDEX | (iconSize == ShellImageSize.Small ? SHGFI.SHGFI_SMALLICON : 0));
if (hSystemImageList.IsNull) return null;
if (iconSize <= ShellImageSize.Small)
return ImageList_GetIcon(hImageList, shfi.iIcon, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT).ToIcon();
return ImageList_GetIcon(hSystemImageList, shfi.iIcon, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT).ToIcon();
return GetSystemIcon(shfi.iIcon, iconSize);
}
/// <summary>Gets the system icon for and index and size.</summary>
/// <param name="index">The index of the system icon to retrieve.</param>
/// <param name="iconSize">Size of the icon.</param>
/// <returns>An <see cref="Icon"/> instance if found; otherwise <see langword="null"/>.</returns>
public static Icon GetSystemIcon(int index, ShellImageSize iconSize = ShellImageSize.Large)
{
SHGetImageList((SHIL)iconSize, typeof(IImageList).GUID, out var il).ThrowIfFailed();
return il.GetIcon(shfi.iIcon, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT).ToIcon();
return il.GetIcon(index, IMAGELISTDRAWFLAGS.ILD_TRANSPARENT)?.ToIcon();
}
/// <summary>Gets the Shell icon for the given file name or extension.</summary>