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C#获取windows系统的图标


这个获取关联图标,可以获取磁盘分区的图标,可以获取某个特定类型的文件的图标,也可以获取某个指定文件的图标/// <summary>
/// 保存文件信息的结构体
/// </summary>
///
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
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;
}
class NativeMethods
{
[DllImport("Shell32.dll", EntryPoint = "SHGetFileInfo", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);
[DllImport("User32.dll", EntryPoint = "DestroyIcon")]
public static extern int DestroyIcon(IntPtr hIcon);
#region API 参数的常量定义
public const uint SHGFI_ICON = 0x100;
public const uint SHGFI_LARGEICON = 0x0; //大图标 32×32
public const uint SHGFI_SMALLICON = 0x1; //小图标 16×16
public const uint SHGFI_USEFILEATTRIBUTES = 0x10;
#endregion
}
/// <summary>
/// 获取文件类型的关联图标
/// </summary>
/// <param name="fileName">文件类型的扩展名或文件的绝对路径</param>
/// <param name="isLargeIcon">是否返回大图标</param>
/// <returns>获取到的图标</returns>
static Icon GetIcon(string fileName, bool isLargeIcon)
{
SHFILEINFO shfi = new SHFILEINFO();
IntPtr hI;
if (isLargeIcon)
hI = NativeMethods.SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), NativeMethods.SHGFI_ICON | NativeMethods.SHGFI_USEFILEATTRIBUTES | NativeMethods.SHGFI_LARGEICON);
else
hI = NativeMethods.SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), NativeMethods.SHGFI_ICON | NativeMethods.SHGFI_USEFILEATTRIBUTES | NativeMethods.SHGFI_SMALLICON);
Icon icon = Icon.FromHandle(shfi.hIcon).Clone() as Icon;
NativeMethods.DestroyIcon(shfi.hIcon); //释放资源
return icon;
}
private void btnGetIcon_Click(object sender, EventArgs e)
{
using (Graphics g = this.pbSmallIcon.CreateGraphics())
{
g.Clear(this.pbSmallIcon.BackColor); //清除picturebox的背景色,为了画透明图标
g.DrawIcon(GetIcon(this.tbFileExt.Text, false), 1, 1); //绘制小图标
}
using (Graphics g = this.pbLargeIcon.CreateGraphics())
{
g.Clear(this.pbLargeIcon.BackColor); //清除picturebox的背景色,为了画透明图标
g.DrawIcon(GetIcon(this.tbFileExt.Text, true), 1, 1); //绘制小图标
}
}


 


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本文链接:https://www.cnblogs.com/lihaishu/p/14173141.html

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