/// <summary>
/// Retrieves a thumbnail for the specified file.
/// </summary>
/// <param name="fileInfo">File to retrieve the thumbnail for.</param>
/// <returns>Image thumbnail.</returns>
public static Image Thumbnail(this FileInfo fileInfo)
{
try
{
ShellThumbnail thumb = new ShellThumbnail();
return(thumb.GetThumbnail(fileInfo.FullName));
}
catch (Exception)
{
// create a dummy file to extract the icon from
string tempPath = string.Format("{0}{1}{2}", Path.GetTempPath(), StringUtilities.GetRandomString(10), fileInfo.Extension);
File.Create(tempPath);
SysImageList list = new SysImageList(SysImageListSize.extraLargeIcons);
Bitmap bitmap = list.Icon(list.IconIndex(tempPath)).ToBitmap();
File.Delete(tempPath);
Bitmap copy = bitmap.Copy();
return(copy);
}
}
/// <summary>
/// Associates a SysImageList with a TreeView control
/// </summary>
/// <param name="treeView">TreeView control to associated ImageList with</param>
/// <param name="sysImageList">System Image List to associate</param>
/// <param name="forStateImages">Whether to add ImageList as StateImageList</param>
public static void SetTreeViewImageList(TreeView treeView, SysImageList sysImageList, bool forStateImages)
{
IntPtr param = (IntPtr)TVSILNORMAL;
if (forStateImages)
{
param = (IntPtr)TVSILSTATE;
}
SendMessage(treeView.Handle, TVMSETIMAGELIST, param, sysImageList.Handle);
}
/// <summary>
/// Associates a SysImageList with a ListView control
/// </summary>
/// <param name="listView">ListView control to associate ImageList with</param>
/// <param name="sysImageList">System Image List to associate</param>
/// <param name="forStateImages">Whether to add ImageList as StateImageList</param>
public static void SetListViewImageList(ListView listView, SysImageList sysImageList, bool forStateImages)
{
IntPtr param = (IntPtr)LVSILNORMAL;
if (sysImageList.ImageListSize == SysImageListSize.smallIcons)
{
param = (IntPtr)LVSILSMALL;
}
if (forStateImages)
{
param = (IntPtr)LVSILSTATE;
}
SendMessage(listView.Handle, LVMSETIMAGELIST, param, sysImageList.Handle);
}