获取打印机状态，急！！！！！！！

[浩南_哥]

我想获取打印机的状态，于是我就用了如下的代码
openPrinter(...);//成功返回
GetPrinter(hPrinter, 2, pPrinterInfo, dwNeeded, &dwNeeded)；
现在的问题是不管打印实际处于什么状态，pPrinterInfo^.status总是为0，这让我十分的郁闷，
打印机型号：三星 ML-2010 端口是USB001。请各位大侠帮帮忙。

[浩南_哥]

怎么没人回答呢，分不够可以加啊

[yowang_]

帮你顶！

[浩南_哥]

[Quote=引用 2 楼 w174504744 的回复:]

帮你顶！
[/Quote]
谢了，高手赶紧来啊

[VC_ZSY]

没做过，帮顶，学习～～

[stonewater]

http://blog.sina.com.cn/s/blog_4b44e1c00100ge82.html

[qq4218699]

11没做过，帮顶，学习～～

[浩南_哥]

[Quote=引用 5 楼 stonewater 的回复:]

http://blog.sina.com.cn/s/blog_4b44e1c00100ge82.html
[/Quote]
谢谢 关注 他用的方法跟我用的一样都是GetPrinter函数的调用 然后取得Status的值，现在的问题关键是这个值他总是0

[stonewater]

DWORD cByteNeeded,cByteUsed;
if (!GetPrinter(hPrinter, 2, NULL, 0, &cByteNeeded))
{
DWORD dwErrorCode = ::GetLastError();
}

PRINTER_INFO_2 *pPrinterInfo = (PRINTER_INFO_2 *)malloc(cByteNeeded);

if (!GetPrinter(hPrinter,
2,
(LPBYTE)pPrinterInfo,
cByteNeeded,
&cByteUsed))
{
DWORD dwErrorCode = ::GetLastError();
}

[stonewater]

GetLastError()看看什么错误

[浩南_哥]

[Quote=引用 9 楼 stonewater 的回复:]

GetLastError()看看什么错误
[/Quote]
没有出错，函数成功调用，pPrinterInfo里的其他属性的值都是正常的跟打印机的属性相符，唯独这个status出问题

[xueer8835]

HANDLE hPrinter = NULL;
DWORD dwNeeded = 0;
PRINTER_INFO_2 *pi2 = NULL;
DEVMODE *pDevMode = NULL;
PRINTER_DEFAULTS pd;
BOOL bFlag;
LONG lFlag;

// Open printer handle (on Windows NT, you need full-access because you
// will eventually use SetPrinter)...
ZeroMemory(&pd, sizeof(pd));
pd.DesiredAccess = PRINTER_ALL_ACCESS;
bFlag = OpenPrinter(lpPrinterName, &hPrinter, &pd);
if(!bFlag || (hPrinter == NULL)) {
AfxMessageBox( "无法打开指定的打印机!" ) ;
return FALSE;
}
// The first GetPrinter tells you how big the buffer should be in
// order to hold all of PRINTER_INFO_2. Note that this should fail with
// ERROR_INSUFFICIENT_BUFFER. If GetPrinter fails for any other reason
// or dwNeeded isn't set for some reason, then there is a problem...
SetLastError(0);
bFlag = GetPrinter(hPrinter, 2, 0, 0, &dwNeeded);
if((!bFlag) && (GetLastError() != ERROR_INSUFFICIENT_BUFFER) || (dwNeeded == 0))
{
ClosePrinter(hPrinter);
AfxMessageBox( "Cannot get the size of the DEVMODE structure" ) ;
return FALSE;
}

// Allocate enough space for PRINTER_INFO_2...
pi2 = (PRINTER_INFO_2 *)GlobalAlloc(GPTR, dwNeeded);
if(pi2 == NULL)
{
ClosePrinter(hPrinter);
return FALSE;
}
// The second GetPrinter fills in all the current settings, so all you
// need to do is modify what you're interested in...
bFlag = GetPrinter(hPrinter, 2, (LPBYTE)pi2, dwNeeded, &dwNeeded);
if (!bFlag)
{
GlobalFree(pi2);
ClosePrinter(hPrinter);
return FALSE;
}

[xueer8835]

 HANDLE hPrinter = NULL;  
    DWORD dwNeeded = 0;  
    PRINTER_INFO_2 *pi2 = NULL;  
    DEVMODE *pDevMode = NULL;  
    PRINTER_DEFAULTS pd;  
    BOOL bFlag;  
    LONG lFlag;  
   
  //   Open   printer   handle   (on   Windows   NT,   you   need   full-access   because   you  
  //   will   eventually   use   SetPrinter)...  
    ZeroMemory(&pd, sizeof(pd));  
    pd.DesiredAccess = PRINTER_ALL_ACCESS;  
    bFlag = OpenPrinter(lpPrinterName, &hPrinter, &pd);  
    if(!bFlag || (hPrinter == NULL))  {
		AfxMessageBox( "无法打开指定的打印机!" ) ;
       return FALSE;  
    }
    //   The   first   GetPrinter   tells   you   how   big   the   buffer   should   be   in    
    //   order   to   hold   all   of   PRINTER_INFO_2.   Note   that   this   should   fail   with    
    //   ERROR_INSUFFICIENT_BUFFER.     If   GetPrinter   fails   for   any   other   reason    
    //   or   dwNeeded   isn't   set   for   some   reason,   then   there   is   a   problem...  
    SetLastError(0);  
    bFlag = GetPrinter(hPrinter, 2, 0, 0, &dwNeeded);  
    if((!bFlag) && (GetLastError() != ERROR_INSUFFICIENT_BUFFER) || (dwNeeded == 0))  
	{  
       ClosePrinter(hPrinter);  
	   AfxMessageBox( "Cannot get the size of the DEVMODE structure" ) ;
       return FALSE;  
	}  
 
     //   Allocate   enough   space   for   PRINTER_INFO_2...  
    pi2 = (PRINTER_INFO_2 *)GlobalAlloc(GPTR, dwNeeded);  
    if(pi2 == NULL)  
	{  
       ClosePrinter(hPrinter);  
       return  FALSE;  
	}  
    //   The   second   GetPrinter   fills   in   all   the   current   settings,   so   all   you  
    //   need   to   do   is   modify   what   you're   interested   in...  
    bFlag = GetPrinter(hPrinter, 2, (LPBYTE)pi2, dwNeeded, &dwNeeded);  
    if (!bFlag)  
	{  
      GlobalFree(pi2);  
      ClosePrinter(hPrinter);  
      return FALSE;  
	} 

[gege45]

应该这样：

::GetPrinter(hPrinter, 2, NULL, 0, &dwNeeded);
if(0 < dwNeeded) {
if (::GetPrinter(hPrinter, 2, pPrinterInfo, dwNeeded, &dwNeeded)){
// here you will get "pPrinterInfo"
}

}

[山伟]

xueer8835

(小妖)
是正确的！！！

[浩南_哥]

昨天由于下班所以没能及时回帖描述情况，谢谢各位关注小弟的情况。
现在的情况是运行代码，PRINTER_INFO_2结构的结果如下：
(“\\test”, “\\test\Samsung ML-2010 Series”, “SamsungM”, “USB001”, “Samsung ML-2010 Series”, “”, “”, $B8CE04, “”, “WinPrint”, “RAW”, “”, $B8CD04, 2584, 1, 0, 0, 0, 0, 0, 0). ↓ ↓
内存地址 内存地址

各位大侠在给分析分析。是不是哪里出错了

[浩南_哥]

还有个重要情况忘了说了，这个打印机是共享的打印机，并不是跟我的主机相连，刚才又看了下Getprinter函数，上面有这么句话：只有在发出调用的应用程序有足够的权限时，PRINTER_INFO_x结构中的一些字段才能够被读取。这种权限由系统当前的安全设置决定。我感觉是不是权限不够啊。

[qq82557566]

又挖一空坟

[chuxuecharp]

楼主问题解决了吗。

[mdejtod]

同问,楼主问题解决了吗?