private IEnumerable <string> EnumerateLocalPrinterNames()
{
int cbneeded = 0;
int nents = 0;
int bufsize = 0;
IntPtr buf = IntPtr.Zero;
PRINTER_INFO_4[] printerinfoarray;
try
{
while (!EnumPrinters(PRINTER_ENUM.LOCAL | PRINTER_ENUM.SHARED, null, 4, buf, bufsize, out cbneeded, out nents))
{
if (cbneeded == bufsize)
{
throw new InvalidOperationException("Unable to enumerate printers");
}
if (buf != IntPtr.Zero)
{
Marshal.FreeHGlobal(buf);
}
buf = Marshal.AllocHGlobal(cbneeded);
bufsize = cbneeded;
}
printerinfoarray = new PRINTER_INFO_4[nents];
for (int i = 0; i < nents; i++)
{
printerinfoarray[i] = (PRINTER_INFO_4)Marshal.PtrToStructure(buf + i * Marshal.SizeOf(typeof(PRINTER_INFO_4)), typeof(PRINTER_INFO_4));
}
return(printerinfoarray.Select(pi => pi.PrinterName).ToArray());
}
finally
{
if (buf != IntPtr.Zero)
{
Marshal.FreeHGlobal(buf);
}
}
}
private IEnumerable<string> EnumerateLocalPrinterNames()
{
int cbneeded = 0;
int nents = 0;
int bufsize = 0;
IntPtr buf = IntPtr.Zero;
PRINTER_INFO_4[] printerinfoarray;
try
{
while (!EnumPrinters(PRINTER_ENUM.LOCAL | PRINTER_ENUM.SHARED, null, 4, buf, bufsize, out cbneeded, out nents))
{
if (cbneeded == bufsize)
{
throw new InvalidOperationException("Unable to enumerate printers");
}
if (buf != IntPtr.Zero)
{
Marshal.FreeHGlobal(buf);
}
buf = Marshal.AllocHGlobal(cbneeded);
bufsize = cbneeded;
}
printerinfoarray = new PRINTER_INFO_4[nents];
for (int i = 0; i < nents; i++)
{
printerinfoarray[i] = (PRINTER_INFO_4)Marshal.PtrToStructure(buf + i * Marshal.SizeOf(typeof(PRINTER_INFO_4)), typeof(PRINTER_INFO_4));
}
return printerinfoarray.Select(pi => pi.PrinterName).ToArray();
}
finally
{
if (buf != IntPtr.Zero)
{
Marshal.FreeHGlobal(buf);
}
}
}
