立象打印机 c#
时间: 2023-11-19 07:07:09 浏览: 92
在C#中监控立象打印机的状态,可以通过调用WIN32 api实现。首先,需要使用System.Runtime.InteropServices命名空间来导入winspool.drv库。可以使用OpenPrinter函数来打开打印机,并使用ClosePrinter函数来关闭打印机。然后,可以使用EnumJobs函数来获取打印机的作业信息和状态。具体的代码如下所示:
```csharp
using System.Runtime.InteropServices;
[DllImport("winspool.drv", CharSet = CharSet.Auto)]
public static extern bool OpenPrinter(string pPrinterName, out IntPtr phPrinter, IntPtr pDefault);//打开打印机
[DllImport("winspool.drv", CharSet = CharSet.Auto)]
public static extern bool ClosePrinter(IntPtr hPrinter);//关闭
[DllImport("winspool.drv", CharSet = CharSet.Auto)]
public static extern int EnumJobs(IntPtr hPrinter, int FirstJob, int NoJobs, int Level, IntPtr pInfo, int cdBuf,out int pcbNeeded, out int pcReturned);//状态获取
//在代码中使用以上函数来监控立象打印机的状态
IntPtr handle;
int FirstJob = 0;
int NumJobs = 127;
int pcbNeeded;
int pcReturned;
// 打开打印机
bool settest = OpenPrinter(printerToPeek, out handle, IntPtr.Zero);
// 获取所需的字节数,这里假设打印机的最大作业数量为128 (0..127)
EnumJobs(handle, FirstJob, NumJobs, 1, IntPtr.Zero, 0, out pcbNeeded, out pcReturned);
// 分配非托管内存
IntPtr pData = Marshal.AllocHGlobal(pcbNeeded);
// 获取作业信息
EnumJobs(handle, FirstJob, NumJobs, 1, pData, pcbNeeded, out pcbNeeded, out pcReturned);
```
请注意,"printerToPeek"应该替换为具体的立象打印机的名称。