如何解决C# 从 WPF 应用程序将 ZPL 打印到 Zebra 打印机
我有一个 C# WPF 应用程序,它应该从 Zebra 打印机打印标签。 Zebra 打印机设置为通用文本打印机(而不是使用 Zebra/其他驱动程序)。标签的 ZPL 代码已经生成,当我从 Notepad 或 Notepad++ 等文本编辑器打印 ZPL 代码时,标签打印得非常好。当我从 WPF 应用程序打印相同的字符串时,得到不同的结果。
是什么导致了这些不同的结果?我已经多次验证 ZPL 代码并将其重新复制到我的应用程序中,因此我非常确信 ZPL 是相同的。有没有更好的通过 C# WPF 应用程序打印的方法?这个想法是允许用户将 Zebra 打印机设置为标准的 Windows 打印机,并在打印时从 PrintDialog 中选择它。
这是我的打印代码:
System.Windows.Controls.PrintDialog prnt = new PrintDialog();
prnt.PageRangeSelection = PageRangeSelection.AllPages;
prnt.UserPageRangeEnabled = false;
Nullable<bool> result = prnt.ShowDialog();
if (result == true)
{
string zpl = "^XA" + Environment.NewLine +
"^RS,3,N,2" + Environment.NewLine +
"^RR3" + Environment.NewLine +
"^XZ" + Environment.NewLine +
"^XA" + Environment.NewLine +
"^SZ2^JMA" + Environment.NewLine +
"^MCY^PMN" + Environment.NewLine +
"^PW459" + Environment.NewLine +
"^LT41" + Environment.NewLine +
"~JSN" + Environment.NewLine +
"^MD30" + Environment.NewLine +
"^JZY" + Environment.NewLine +
"^LH0,0^LRN" + Environment.NewLine +
"^XZ" + Environment.NewLine +
"^XA" + Environment.NewLine +
"^FT31,42" + Environment.NewLine +
"^CI0" + Environment.NewLine +
"^A0N,23,31^FDAsset ID:^FS" + Environment.NewLine +
"^FT31,74" + Environment.NewLine +
"^A0N,31^FDA0000001^FS" + Environment.NewLine +
"^FT31,106" + Environment.NewLine +
"^A0N,31^FDItem Code:^FS" + Environment.NewLine +
"^FT31,137" + Environment.NewLine +
"^A0N,31^FD500124^FS" + Environment.NewLine +
"^FT49,324" + Environment.NewLine +
"^A0N,31^FDShuttleworth conveyor^FS" + Environment.NewLine +
"^FT49,346" + Environment.NewLine +
"^A0N,31^FDnylon rollers - A^FS" + Environment.NewLine +
"^FT49,369" + Environment.NewLine +
"^A0N,31^FDsection of roller is 4-1/2^FS" + Environment.NewLine +
"^FT49,392" + Environment.NewLine +
"^A0N,31^FDlong with a deep pocket...^FS" + Environment.NewLine +
"^FT31,172" + Environment.NewLine +
"^A0N,31^FDMfgr Part:^FS" + Environment.NewLine +
"^FT31,202" + Environment.NewLine +
"^A0N,31^FD701646-231A^FS" + Environment.NewLine +
"^FT31,254" + Environment.NewLine +
"^A0N,31^FDStore:^FS" + Environment.NewLine +
"^FT258,31^FDBin:^FS" + Environment.NewLine +
"^FT31,289" + Environment.NewLine +
"^A0N,31^FDB5 Maint^FS" + Environment.NewLine +
"^FT258,31^FDE6B^FS" + Environment.NewLine +
"^FO258,23" + Environment.NewLine +
"^BY1^BCN,38,N^FD>:A0>5000001^FS" + Environment.NewLine +
"^FO258,87" + Environment.NewLine +
"^BCN,N^FD>;500124^FS" + Environment.NewLine +
"^RFW,H,1,2,1^FD1400^FS" + Environment.NewLine +
"^RFW,4,1^FDA0000001^FS" + Environment.NewLine +
"^PQ1,Y" + Environment.NewLine +
"^XZ" + Environment.NewLine;
var doc = new FlowDocument();
doc.ColumnWidth = prnt.PrintableAreaWidth;
Paragraph p = new Paragraph();
p.Inlines.Add(zpl);
doc.Blocks.Add(p);
prnt.PrintDocument(((IDocumentPaginatorSource)doc).DocumentPaginator,"Label A0000001");
//doc.Blocks.Add(new Paragraph(new Run(zpl)));
//prnt.PrintDocument(((IDocumentPaginatorSource)doc).DocumentPaginator,"Label A0000001");
//prnt.PrintDocument((Section)XamlReader.Parse(zpl));
}
以下是从文本编辑器(左)与我的应用程序(右)打印标签的结果:
解决方法
我可以使用以下代码解决我的问题:
System.Windows.Controls.PrintDialog prnt = new PrintDialog();
prnt.PageRangeSelection = PageRangeSelection.AllPages;
prnt.UserPageRangeEnabled = false;
Nullable<bool> result = prnt.ShowDialog();
if (result == true)
{
ZPL = "<My ZPL>"; // Global string variable
PrintDocument pdoc = new PrintDocument();
pdoc.PrintPage += pdoc_PrintPage;
pdoc.PrinterSettings.PrinterName = prnt.PrintQueue.FullName;
pdoc.Print();
}
然后在 PrintPage 事件中:
void pdoc_PrintPage(object sender,PrintPageEventArgs ev)
{
// printFont is a global Font variable set to new Font("Arial",10)
ev.Graphics.DrawString(ZPL,printFont,System.Drawing.Brushes.Black,new StringFormat());
}
现在,在 PrintDialog 中自动选择上次使用的打印机是我的下一个挑战。
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