public static Icon ExtractIconFromFile(string fileAndParam)
{
try {
EmbeddedIconInfo embeddedIcon = GetEmbeddedIconInfo(fileAndParam);
IntPtr lIcon = ExtractIcon(0, embeddedIcon.FileName, embeddedIcon.IconIndex);
return(Icon.FromHandle(lIcon));
} catch (Exception) {
return(null);
// throw exc;
}
}
protected static EmbeddedIconInfo GetEmbeddedIconInfo(string fileAndParam)
{
var embeddedIcon = new EmbeddedIconInfo();
if (String.IsNullOrEmpty(fileAndParam))
{
return(embeddedIcon);
}
//Use to store the file contains icon.
string fileName;
//The index of the icon in the file.
int iconIndex = 0;
string iconIndexString = String.Empty;
int commaIndex = fileAndParam.IndexOf(",");
//if fileAndParam is some thing likes that: "C:\\Program Files\\NetMeeting\\conf.exe,1".
if (commaIndex > 0)
{
fileName = fileAndParam.Substring(0, commaIndex);
iconIndexString = fileAndParam.Substring(commaIndex + 1);
}
else
{
fileName = fileAndParam;
}
if (!String.IsNullOrEmpty(iconIndexString))
{
//Get the index of icon.
iconIndex = int.Parse(iconIndexString);
if (iconIndex < 0)
{
iconIndex = 0; //To avoid the invalid index.
}
}
embeddedIcon.FileName = fileName;
embeddedIcon.IconIndex = iconIndex;
return(embeddedIcon);
}
public static Icon ExtractIconFromFile(string fileAndParam, bool isLarge)
{
var hDummy = new[] { IntPtr.Zero };
var hIconEx = new[] { IntPtr.Zero };
try {
EmbeddedIconInfo embeddedIcon = GetEmbeddedIconInfo(fileAndParam);
uint readIconCount = isLarge ? ExtractIconEx(embeddedIcon.FileName, 0, hIconEx, hDummy, 1) : ExtractIconEx(embeddedIcon.FileName, 0, hDummy, hIconEx, 1);
if (readIconCount > 0 && hIconEx[0] != IntPtr.Zero)
{
// Get first icon.
var extractedIcon = (Icon)Icon.FromHandle(hIconEx[0]).Clone();
return(extractedIcon);
}
else
{
return(null);
}
} catch (Exception exc) {
throw new ApplicationException("Could not extract icon", exc);
} finally {
foreach (IntPtr ptr in hIconEx)
{
if (ptr != IntPtr.Zero)
{
DestroyIcon(ptr);
}
}
foreach (IntPtr ptr in hDummy)
{
if (ptr != IntPtr.Zero)
{
DestroyIcon(ptr);
}
}
}
}
