VB.NET获取文件默认图标的方法

该段代码帮助你获取计算机上的任何文件的默认图标，使用Shell32.dll。

Private Structure SHFILEINFO
Public hIcon As IntPtr
Public iIcon As Integer
Public dwAttributes As Integer
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=260)> _
Public szDisplayName As String
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=80)> _
Public szTypeName As String
End Structure
Private Declare Auto Function SHGetFileInfo Lib "shell32.dll" _
(ByVal pszPath As String, _
ByVal dwFileAttributes As Integer, _
ByRef psfi As SHFILEINFO, _
ByVal cbFileInfo As Integer, _
ByVal uFlags As Integer) As IntPtr
Private Const SHGFI_ICON = &H100
Private Const SHGFI_SMALLICON = &H1
Private Const SHGFI_LARGEICON = &H0
Private nIndex = 0
Private hImgLarge As IntPtr 'The handle to the system image list.
Private Function GetLargeIcon(ByVal FilePath As String) As System.Drawing.Icon
Dim fName As String
Dim shinfo As SHFILEINFO
shinfo = New SHFILEINFO()
shinfo.szDisplayName = New String(Chr(0), 260)
shinfo.szTypeName = New String(Chr(0), 80)
fName = FilePath
hImgLarge = SHGetFileInfo(fName, 0,
shinfo, Marshal.SizeOf(shinfo),
SHGFI_ICON Or SHGFI_LARGEICON)
Dim myIcon As System.Drawing.Icon
myIcon = System.Drawing.Icon.FromHandle(shinfo.hIcon)
Return myIcon
End Function
Private Function GetSmallIcon(ByVal FilePath As String) As System.Drawing.Icon
Dim fName As String
Dim shinfo As SHFILEINFO
shinfo = New SHFILEINFO()
shinfo.szDisplayName = New String(Chr(0), 260)
shinfo.szTypeName = New String(Chr(0), 80)
fName = FilePath
hImgLarge = SHGetFileInfo(fName, 0,
shinfo, Marshal.SizeOf(shinfo),
SHGFI_ICON Or SHGFI_SMALLICON)
Dim myIcon As System.Drawing.Icon
myIcon = System.Drawing.Icon.FromHandle(shinfo.hIcon)
Return myIcon
End Function

希望本文所述对大家的VB.NET程序设计有所帮助。

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