VB.NET获取文件默认图标的方法-中华考试网

VB.NET获取文件默认图标的方法

2017-7-26编辑:daibenhua

本文实例讲述了VB.NET获取文件默认图标的方法。分享给大家供大家参考。具体如下：

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
   _ 
  Public szDisplayName As String
   _ 
  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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