使用SetPrinter修改打印机名称

最近项目需要修改打印机名称

public static bool SetPrinterName(string OldName, string newName)
        {
            IntPtr hPrinter;
            PrintAPI.structPrinterDefaults defaults = new PrintAPI.structPrinterDefaults();
            defaults.pDatatype = null;
            defaults.pDevMode = IntPtr.Zero;
            defaults.DesiredAccess = PrintAPI.PRINTER_ACCESS_ADMINISTER | PrintAPI.PRINTER_ACCESS_USE;
            if (PrintAPI.OpenPrinter(OldName, out hPrinter, ref defaults))
            {
                int cbNeeded = 0;
                bool bolRet = PrintAPI.GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out cbNeeded);
                if (cbNeeded >= 0)
                {
                    IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
                    bolRet = PrintAPI.GetPrinter(hPrinter, 2, pAddr, cbNeeded, out cbNeeded);
                    if (bolRet)
                    {
                        PrintAPI.PRINTER_INFO_2 info6 = new PrintAPI.PRINTER_INFO_2();
                        info6 = (PrintAPI.PRINTER_INFO_2)Marshal.PtrToStructure(pAddr, typeof(PrintAPI.PRINTER_INFO_2));
                        info6.pPrinterName = newName;
                        IntPtr pPrinter = Marshal.AllocHGlobal(Marshal.SizeOf(info6));
                        Marshal.StructureToPtr(info6, pPrinter, false);
                        bolRet = PrintAPI.SetPrinter(hPrinter, 2, pPrinter, 0);
                        Marshal.FreeHGlobal(pPrinter);
                    }
                    Marshal.FreeHGlobal(pAddr);
                }
                PrintAPI.ClosePrinter(hPrinter);
                return bolRet;
            }
            return false;
        }

大概的代码逻辑就是这样，这边有一个重点

PrintAPI.structPrinterDefaults defaults = new PrintAPI.structPrinterDefaults();
            defaults.pDatatype = null;
            defaults.pDevMode = IntPtr.Zero;
            defaults.DesiredAccess = PrintAPI.PRINTER_ACCESS_ADMINISTER | PrintAPI.PRINTER_ACCESS_USE;

一定要加这个设置权限，不然执行不成功。