[C#] 獲取打印機列表，
一：獲得本地安裝的打印機列表
注：（如果在“設備和打印機”中已經添加了局域網的打印機設備，也算是本地安裝的打印機；沒有添加的則算作局域網打印機）
1，通過C#中PrinterSettings對象獲取，如下，然後通過foreach即可遍歷printers；
PrinterSettings.StringCollection printers = System.Drawing.Printing.PrinterSettings.InstalledPrinters;
2，PrintHelper類以及方法GetEnumPrinters2，見文章最後部分；
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1 PRINTER_INFO_2[] printers = PrintHelper.GetEnumPrinters2();
2 foreach (PRINTER_INFO_2 printer in printers)
3 {
4 listBox1.Items.Add(printer.pPrinterName);
5 }
View Code
3，通過ManagementObjectCollection（需要添加System.Management引用）來查詢本地計算機中的打印機列表；
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1 // 獲取本地打印機列表
2 ManagementObjectCollection queryCollection;
3 string sql = "SELECT * FROM Win32_Printer";
4 Dictionary<string, ManagementObject> dict = new Dictionary<string, ManagementObject>();
5 ManagementObjectSearcher query = new ManagementObjectSearcher(sql);
6 queryCollection = query.Get();
7 foreach (ManagementObject mo in queryCollection)
8 {
9 string oldName = mo["Name"].ToString();
10 listBox1.Items.Add(oldName);
11 }
View Code
二：獲取局域網打印機列表
1，PrintHelper類以及方法GetEnumPrinters2，見文章最後部分；
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1 PRINTER_INFO_1[] printers = PrintHelper.GetEnumPrinters();
2 foreach (PRINTER_INFO_1 printer in printers)
3 {
4 if (-1 == printer.pName.IndexOf("!!"))
5 {
6 listBox1.Items.Add(printer.pName);
7 }
8 else
9 {
10 uint pcbNeeded = 0;
11 uint pcReturned = 0;
12 IntPtr pPrInfo4 = IntPtr.Zero;
13 uint size = 0;
14 string pNewName = printer.pName;
15 PrintHelper.EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_NAME, pNewName, 1, IntPtr.Zero, size, ref pcbNeeded, ref pcReturned);
16 if (pcbNeeded != 0)
17 {
18 pPrInfo4 = Marshal.AllocHGlobal((int)pcbNeeded);
19 size = pcbNeeded;
20 PrintHelper.EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_NAME, pNewName, 1, pPrInfo4, size, ref pcbNeeded, ref pcReturned);
21 PRINTER_INFO_1[] printerInfo1 = new PRINTER_INFO_1[pcReturned];
22 int offset = pPrInfo4.ToInt32();
23 Type type = typeof(PRINTER_INFO_1);
24 int increment = Marshal.SizeOf(type);
25 for (int i = 0; i < pcReturned; i++)
26 {
27 printerInfo1[i] = (PRINTER_INFO_1)Marshal.PtrToStructure(new IntPtr(offset), type);
28 offset += increment;
29 listBox1.Items.Add(printerInfo1[i].pName);
30 }
31 Marshal.FreeHGlobal(pPrInfo4);
32 }
33 }
34 }
View Code
PrintHelper類以及相關枚舉和信息類定義
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1 public class PrintHelper
2 {
3 [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
4 [return: MarshalAs(UnmanagedType.Bool)]
5 public static extern bool EnumPrinters(PrinterEnumFlags Flags, string Name, uint Level, IntPtr pPrinterEnum, uint cbBuff, ref uint pcbNeeded, ref uint pcReturned);
6
7 // 獲取網絡打印機
8 public static PRINTER_INFO_1[] GetEnumPrinters(PrinterEnumFlags flags)
9 {
10 PRINTER_INFO_1[] printerInfo1 = new PRINTER_INFO_1[] { };
11 uint pcbNeeded = 0;
12 uint pcReturned = 0;
13 IntPtr pPrInfo4 = IntPtr.Zero;
14 uint size = 0;
15 if (EnumPrinters(flags, null, 1, IntPtr.Zero, size, ref pcbNeeded, ref pcReturned))
16 {
17 return printerInfo1;
18 }
19 if (pcbNeeded != 0)
20 {
21 pPrInfo4 = Marshal.AllocHGlobal((int)pcbNeeded);
22 size = pcbNeeded;
23 EnumPrinters(flags, null, 1, pPrInfo4, size, ref pcbNeeded, ref pcReturned);
24 if (pcReturned != 0)
25 {
26 printerInfo1 = new PRINTER_INFO_1[pcReturned];
27 int offset = pPrInfo4.ToInt32();
28 Type type = typeof(PRINTER_INFO_1);
29 int increment = Marshal.SizeOf(type);
30 for (int i = 0; i < pcReturned; i++)
31 {
32 printerInfo1[i] = (PRINTER_INFO_1)Marshal.PtrToStructure(new IntPtr(offset), type);
33 offset += increment;
34 }
35 Marshal.FreeHGlobal(pPrInfo4);
36 }
37 }
38
39 return printerInfo1;
40 }
41
42 // 獲取本地打印機
43 public static PRINTER_INFO_2[] GetEnumPrinters2()
44 {
45 PRINTER_INFO_2[] printerInfo2 = new PRINTER_INFO_2[] { };
46 uint pcbNeeded = 0;
47 uint pcReturned = 0;
48 IntPtr pPrInfo4 = IntPtr.Zero;
49 if (EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, IntPtr.Zero, 0, ref pcbNeeded, ref pcReturned))
50 {
51 return printerInfo2;
52 }
53 if (pcbNeeded != 0)
54 {
55 pPrInfo4 = Marshal.AllocHGlobal((int)pcbNeeded);
56 EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, pPrInfo4, pcbNeeded, ref pcbNeeded, ref pcReturned);
57 if (pcReturned != 0)
58 {
59 printerInfo2 = new PRINTER_INFO_2[pcReturned];
60 int offset = pPrInfo4.ToInt32();
61 for (int i = 0; i < pcReturned; i++)
62 {
63 printerInfo2[i] = (PRINTER_INFO_2)Marshal.PtrToStructure(new IntPtr(offset), typeof(PRINTER_INFO_2));
64 offset += Marshal.SizeOf(typeof(PRINTER_INFO_2));
65 }
66 Marshal.FreeHGlobal(pPrInfo4);
67 }
68 }
69
70 return printerInfo2;
71 }
72 }
PrintHelper
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1 [FlagsAttribute]
2 public enum PrinterEnumFlags
3 {
4 PRINTER_ENUM_DEFAULT = 0x00000001,
5 PRINTER_ENUM_LOCAL = 0x00000002,
6 PRINTER_ENUM_CONNECTIONS = 0x00000004,
7 PRINTER_ENUM_FAVORITE = 0x00000004,
8 PRINTER_ENUM_NAME = 0x00000008,
9 PRINTER_ENUM_REMOTE = 0x00000010,
10 PRINTER_ENUM_SHARED = 0x00000020,
11 PRINTER_ENUM_NETWORK = 0x00000040,
12 PRINTER_ENUM_EXPAND = 0x00004000,
13 PRINTER_ENUM_CONTAINER = 0x00008000,
14 PRINTER_ENUM_ICONMASK = 0x00ff0000,
15 PRINTER_ENUM_ICON1 = 0x00010000,
16 PRINTER_ENUM_ICON2 = 0x00020000,
17 PRINTER_ENUM_ICON3 = 0x00040000,
18 PRINTER_ENUM_ICON4 = 0x00080000,
19 PRINTER_ENUM_ICON5 = 0x00100000,
20 PRINTER_ENUM_ICON6 = 0x00200000,
21 PRINTER_ENUM_ICON7 = 0x00400000,
22 PRINTER_ENUM_ICON8 = 0x00800000,
23 PRINTER_ENUM_HIDE = 0x01000000
24 }
PrinterEnumFlags
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1 [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
2 public struct PRINTER_INFO_1
3 {
4 int flags;
5 [MarshalAs(UnmanagedType.LPTStr)]
6 public string pDescription;
7 [MarshalAs(UnmanagedType.LPTStr)]
8 public string pName;
9 [MarshalAs(UnmanagedType.LPTStr)]
10 public string pComment;
11 }
PRINTER_INFO_1
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1 [StructLayout(LayoutKind.Sequential)]
2 public struct PRINTER_INFO_2
3 {
4 [MarshalAs(UnmanagedType.LPTStr)]
5 public string pServerName;
6 [MarshalAs(UnmanagedType.LPTStr)]
7 public string pPrinterName;
8 [MarshalAs(UnmanagedType.LPTStr)]
9 public string pShareName;
10 [MarshalAs(UnmanagedType.LPTStr)]
11 public string pPortName;
12 [MarshalAs(UnmanagedType.LPTStr)]
13 public string pDriverName;
14 [MarshalAs(UnmanagedType.LPTStr)]
15 public string pComment;
16 [MarshalAs(UnmanagedType.LPTStr)]
17 public string pLocation;
18 public IntPtr pDevMode;
19 [MarshalAs(UnmanagedType.LPTStr)]
20 public string pSepFile;
21 [MarshalAs(UnmanagedType.LPTStr)]
22 public string pPrintProcessor;
23 [MarshalAs(UnmanagedType.LPTStr)]
24 public string pDatatype;
25 [MarshalAs(UnmanagedType.LPTStr)]
26 public string pParameters;
27 public IntPtr pSecurityDescriptor;
28 public uint Attributes;
29 public uint Priority;
30 public uint DefaultPriority;
31 public uint StartTime;
32 public uint UntilTime;
33 public uint Status;
34 public uint cJobs;
35 public uint AveragePPM;
36 }
PRINTER_INFO_2
參考資料：
http://www.pinvoke.net/default.aspx/winspool.EnumPrinters
https://msdn.microsoft.com/en-us/library/windows/desktop/dd162692(v=vs.85).aspx
