我正在使用 C# 和 Winforms 创建一个应用程序，现在我需要在热敏打印机上打印销售收据。为此，我创建了一个文本文件并使用 PrintDocument 读取它以进行打印，但我不能这样做，因为我不知道如何配置纸张大小、对齐纸张上的文本中心以及其他配置。当我打印时，文本文件已打印，但很乱，打印结束后纸张并没有停止。
我怎么能这样做？
试。
private PrintDocument printDocument = new PrintDocument();
private static String RECEIPT = Environment.CurrentDirectory + @"\comprovantes\comprovante.txt";
private String stringToPrint = "";
private void button1_Click(object sender, EventArgs e)
{
generateReceipt();
printReceipt();
}
private void generateReceipt()
{
FileStream fs = new FileStream(COMPROVANTE, FileMode.Create);
StreamWriter writer = new StreamWriter(fs);
writer.WriteLine("==========================================");
writer.WriteLine(" NOME DA EMPRESA AQUI ");
writer.WriteLine("==========================================");
writer.Close();
fs.Close();
}
private void printReceipt()
{
FileStream fs = new FileStream(COMPROVANTE, FileMode.Open);
StreamReader sr = new StreamReader(fs);
stringToPrint = sr.ReadToEnd();
printDocument.PrinterSettings.PrinterName = DefaultPrinter.GetDefaultPrinterName();
printDocument.PrintPage += new PrintPageEventHandler(printPage);
printDocument.Print();
sr.Close();
fs.Close();
}
private void printPage(object sender, PrintPageEventArgs e)
{
int charactersOnPage = 0;
int linesPerPage = 0;
Graphics graphics = e.Graphics;
// Sets the value of charactersOnPage to the number of characters
// of stringToPrint that will fit within the bounds of the page.
graphics.MeasureString(stringToPrint, this.Font,
e.MarginBounds.Size, StringFormat.GenericTypographic,
out charactersOnPage, out linesPerPage);
// Draws the string within the bounds of the page
graphics.DrawString(stringToPrint, this.Font, Brushes.Black,
e.MarginBounds, StringFormat.GenericTypographic);
// Remove the portion of the string that has been printed.
stringToPrint = stringToPrint.Substring(charactersOnPage);
// Check to see if more pages are to be printed.
e.HasMorePages = (stringToPrint.Length > 0);
}
我正在尝试创建这种收据模型。
使用 RDLC，但是开始打印 很慢。我正在关注这个 example
//works but slow
private void Run() {
LocalReport report = new LocalReport();
report.ReportPath = @"..\..\reports\ReciboDeVenda.rdlc";
Export(report);
Print();
}
private void Export(LocalReport report) {
string deviceInfo =
@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>8.5in</PageWidth>
<PageHeight>11in</PageHeight>
<MarginTop>0.25in</MarginTop>
<MarginLeft>0.25in</MarginLeft>
<MarginRight>0.25in</MarginRight>
<MarginBottom>0.25in</MarginBottom>
</DeviceInfo>";
Warning[] warnings;
m_streams = new List<Stream>();
report.Render("Image", deviceInfo, CreateStream,
out warnings);
foreach (Stream stream in m_streams)
stream.Position = 0;
}
private Stream CreateStream(string name, string fileNameExtension,
Encoding encoding, string mimeType, bool willSeek) {
Stream stream = new MemoryStream();
m_streams.Add(stream);
return stream;
}
private void Print() {
if (m_streams == null || m_streams.Count == 0)
throw new Exception("Error: no stream to print.");
PrintDocument printDoc = new PrintDocument();
printDoc.PrinterSettings.PrinterName = DefaultPrinter.GetDefaultPrinterName();
if (!printDoc.PrinterSettings.IsValid) {
throw new Exception("Error: cannot find the default printer.");
}else {
printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
m_currentPageIndex = 0;
printDoc.Print();
}
}
private void PrintPage(object sender, PrintPageEventArgs ev) {
Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
// Adjust rectangular area with printer margins.
Rectangle adjustedRect = new Rectangle(
ev.PageBounds.Left - (int)ev.PageSettings.HardMarginX,
ev.PageBounds.Top - (int)ev.PageSettings.HardMarginY,
ev.PageBounds.Width,
ev.PageBounds.Height);
// Draw a white background for the report
ev.Graphics.FillRectangle(Brushes.White, adjustedRect);
// Draw the report content
ev.Graphics.DrawImage(pageImage, adjustedRect);
// Prepare for the next page. Make sure we haven't hit the end.
m_currentPageIndex++;
ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
}
最佳答案
如果你向你的 printPage(object sender, PrintEventArgs e) 方法发送一个纯字符串，它只会以看起来“凌乱”的所有相同字体打印纯文本(正如你命名的那样)
如果您希望它以不同字体(粗体、常规)格式良好地打印，则必须手动完成所有操作:
List<string> itemList = new List<string>()
{
"201", //fill from somewhere in your code
"202"
};
private void printPage( object sender, PrintPageEventArgs e )
{
Graphics graphics = e.Graphics;
Font regular = new Font( FontFamily.GenericSansSerif, 10.0f, FontStyle.Regular );
Font bold = new Font( FontFamily.GenericSansSerif, 10.0f, FontStyle.Bold );
//print header
graphics.DrawString( "FERREIRA MATERIALS PARA CONSTRUCAO LTDA", bold, Brushes.Black, 20, 10 );
graphics.DrawString( "EST ENGENHEIRO MARCILAC, 116, SAO PAOLO - SP", regular, Brushes.Black, 30, 30 );
graphics.DrawString( "Telefone: (11)5921-3826", regular, Brushes.Black, 110, 50 );
graphics.DrawLine( Pens.Black, 80, 70, 320, 70 );
graphics.DrawString( "CUPOM NAO FISCAL", bold, Brushes.Black, 110, 80 );
graphics.DrawLine( Pens.Black, 80, 100, 320, 100 );
//print items
graphics.DrawString( "COD | DESCRICAO | QTY | X | Vir Unit | Vir Total |", bold, Brushes.Black, 10, 120 );
graphics.DrawLine( Pens.Black, 10, 140, 430, 140 );
for( int i = 0; i < itemList.Count; i++ )
{
graphics.DrawString( itemList[i].ToString(), regular, Brushes.Black, 20, 150 + i * 20 );
}
//print footer
//...
regular.Dispose();
bold.Dispose();
// Check to see if more pages are to be printed.
e.HasMorePages = ( itemList.Count > 20 );
}
我的例子可能的改进:
graphics.MeasureString() 可以更好地将标题字符串居中。 因为这一切工作量很大，您真的应该考虑使用 RDLC 或某些第三方软件来设计您的文档。
关于c# - 如何使用 PrintDocument 在热敏打印机上打印文本文件？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39692928/