这是我的示例代码.但它打印的是一个空页面
printDocument1.DocumentName = "C:\a.pbf";// PrintDocument printDocument1
printDialog1.Document = printDocument1;
printDialog1.AllowPrintToFile = true;
printDialog1.AllowSelection = true;
printDialog1.AllowSomePages = true;
printDialog1.PrintToFile = true;
if (printDialog1.ShowDialog() == DialogResult.OK)
printDocument1.Print();
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这有什么不对吗?请帮我