12
我正在製作一個類似於應用程序的瀏覽器來瀏覽存儲在我的計算機上的文件。我的應用程序將在「圖標」視圖。問題是:如何顯示exe文件的圖標?獲取程序圖標
我正在製作一個類似於應用程序的瀏覽器來瀏覽存儲在我的計算機上的文件。我的應用程序將在「圖標」視圖。問題是:如何顯示exe文件的圖標?獲取程序圖標
有幾種方法可以做到這一點。最簡單的可能是添加引用System.Drawing
並採取Icon.ExtractAssociatedIcon
方法的優點:
public static ImageSource GetIcon(string fileName)
{
Icon icon = Icon.ExtractAssociatedIcon(fileName);
return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
icon.Handle,
new Int32Rect(icon.Width, icon.Height),
BitmapSizeOptions.FromEmptyOptions());
}
另一種選擇,如果你不想使用System.Drawing
,是獲得來自SHGetFileInfo
API的圖標。這比較困難,但也更加靈活;例如,你可以根據擴展名獲得不存在的文件的圖標(當然對於可執行文件來說它不是很有用,因爲它會返回可執行文件的默認圖標)。
public static ImageSource GetIcon(string path, bool smallIcon, bool isDirectory)
{
// SHGFI_USEFILEATTRIBUTES takes the file name and attributes into account if it doesn't exist
uint flags = SHGFI_ICON | SHGFI_USEFILEATTRIBUTES;
if (smallIcon)
flags |= SHGFI_SMALLICON;
uint attributes = FILE_ATTRIBUTE_NORMAL;
if (isDirectory)
attributes |= FILE_ATTRIBUTE_DIRECTORY;
SHFILEINFO shfi;
if (0 != SHGetFileInfo(
path,
attributes,
out shfi,
(uint)Marshal.SizeOf(typeof(SHFILEINFO)),
flags))
{
return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
shfi.hIcon,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
}
return null;
}
[StructLayout(LayoutKind.Sequential)]
private struct SHFILEINFO
{
public IntPtr hIcon;
public int iIcon;
public uint dwAttributes;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
public string szDisplayName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
public string szTypeName;
}
[DllImport("shell32")]
private static extern int SHGetFileInfo(string pszPath, uint dwFileAttributes, out SHFILEINFO psfi, uint cbFileInfo, uint flags);
private const uint FILE_ATTRIBUTE_READONLY = 0x00000001;
private const uint FILE_ATTRIBUTE_HIDDEN = 0x00000002;
private const uint FILE_ATTRIBUTE_SYSTEM = 0x00000004;
private const uint FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
private const uint FILE_ATTRIBUTE_ARCHIVE = 0x00000020;
private const uint FILE_ATTRIBUTE_DEVICE = 0x00000040;
private const uint FILE_ATTRIBUTE_NORMAL = 0x00000080;
private const uint FILE_ATTRIBUTE_TEMPORARY = 0x00000100;
private const uint FILE_ATTRIBUTE_SPARSE_FILE = 0x00000200;
private const uint FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400;
private const uint FILE_ATTRIBUTE_COMPRESSED = 0x00000800;
private const uint FILE_ATTRIBUTE_OFFLINE = 0x00001000;
private const uint FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000;
private const uint FILE_ATTRIBUTE_ENCRYPTED = 0x00004000;
private const uint FILE_ATTRIBUTE_VIRTUAL = 0x00010000;
private const uint SHGFI_ICON = 0x000000100; // get icon
private const uint SHGFI_DISPLAYNAME = 0x000000200; // get display name
private const uint SHGFI_TYPENAME = 0x000000400; // get type name
private const uint SHGFI_ATTRIBUTES = 0x000000800; // get attributes
private const uint SHGFI_ICONLOCATION = 0x000001000; // get icon location
private const uint SHGFI_EXETYPE = 0x000002000; // return exe type
private const uint SHGFI_SYSICONINDEX = 0x000004000; // get system icon index
private const uint SHGFI_LINKOVERLAY = 0x000008000; // put a link overlay on icon
private const uint SHGFI_SELECTED = 0x000010000; // show icon in selected state
private const uint SHGFI_ATTR_SPECIFIED = 0x000020000; // get only specified attributes
private const uint SHGFI_LARGEICON = 0x000000000; // get large icon
private const uint SHGFI_SMALLICON = 0x000000001; // get small icon
private const uint SHGFI_OPENICON = 0x000000002; // get open icon
private const uint SHGFI_SHELLICONSIZE = 0x000000004; // get shell size icon
private const uint SHGFI_PIDL = 0x000000008; // pszPath is a pidl
private const uint SHGFI_USEFILEATTRIBUTES = 0x000000010; // use passed dwFileAttribute
這種方法的另一個優點是,它也可以得到一個目錄的圖標(見代碼最後一次編輯),這是不可能的Icon.ExtractAssociatedIcon
OMG存在。 – 2011-05-15 13:22:10
此功能是否存在於WPF? – Cobold 2011-05-15 13:28:26
哪個功能? Icon.ExtractAssociatedIcon?它不是WPF本身的一部分,但它在.NET Framework中。 System.Drawing只是GDI的包裝 – 2011-05-15 13:33:35