C#PrintDocument 打印问题

2018-02-21 07:30:20 996 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

告别WPS！C#针式打印机高效打印方案（PrintDocument全解析）本文详细解析了C#中PrintDocument组件在针式打印机高效打印中的应用，对比了传统WPS方案的性能瓶颈，提供了从基础配置到高级优化的全流程实战指南。通过直接控制打印机实现毫米级精度打印，显著提升票据、报表等场景的打印效率和代码简洁度。阅读详情

web页面，用PrintDocument打印的；pd.DefaultPageSettings.PrinterSettings.PrinterName在程序发布后获取不到默认打印机，在vs里调试时可以获取，为什么发布之后就获取不到了呢，怎么解决

private StringReader sr;
//str要打印的数据
public bool Print(string str)
{
bool result = true;
try
{
sr = new StringReader(str);
PrintDocument pd = new PrintDocument();
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
pd.DefaultPageSettings.Margins.Top = 2;
pd.DefaultPageSettings.Margins.Left = 0;
pd.DefaultPageSettings.PaperSize = new PaperSize("tom", 320, 5150);
pd.PrinterSettings.PrinterName = pd.DefaultPageSettings.PrinterSettings.PrinterName;//默认打印机
pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
try
{
pd.Print();
}
catch (Exception exs)
{
lblerror.Text = pd.PrinterSettings.PrinterName + "打印出错:" + exs.ToString();
pd.PrintController.OnEndPrint(pd, new PrintEventArgs());
}
}
catch (Exception ex)
{
result = false;
}
finally
{
if (sr != null)
sr.Close();
}
return result;
}
private void pd_PrintPage(object sender, PrintPageEventArgs ev)
{
Font printFont = new Font("Arial", 9);//打印字体
float linesPerPage = 0;
float yPos = 0;
int count = 0;
float leftMargin = ev.MarginBounds.Left;
float topMargin = ev.MarginBounds.Top;
String line = "";
linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics);
while (count < linesPerPage && ((line = sr.ReadLine()) != null))
{
yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
ev.Graphics.DrawString(line, printFont, Brushes.Black,
leftMargin, yPos, new StringFormat());
count++;
}
// If more lines exist, print another page.
if (line != null)
ev.HasMorePages = true;
else
ev.HasMorePages = false;
}

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