如何使用 PrintDocument 在热敏打印机上打印文本文件？
How to print a text file on thermal printer using PrintDocument?
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，我正在创建一个文本文件并使用 PrintDocument 读取它以进行打印，但我无法执行此操作，因为我不知道如何配置纸张尺寸、在纸张上对齐文本中心以及其他配置。当我打印时，文本文件打印出来了，但是很乱，打印结束后纸张就不会停止。
我该怎么做？
正在尝试。
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，但是启动打印速度很慢。我关注这个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);
}
您的热敏打印机支持 OPOS 吗？
如果是，我建议您尝试使用 Microsoft Point of Service
如果您将纯字符串发送到您的 printPage(object sender, PrintEventArgs e) 方法，它只会以看起来 'messy'（如您所命名）的所有相同字体打印纯文本
如果你想用不同的字体（粗体，常规）打印出来，你必须手动完成：
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 );
}
对我的示例的可能改进：
- 使用
graphics.MeasureString(). 可以更好地使 header 字符串居中
- 项目列表最好是企业列表class而不是纯字符串
因为这一切都是很多工作，你真的应该考虑使用 RDLC 或一些第三方软件来设计你的文档。
如果我想自己创建报告，而不是尝试创建文本文件，我将使用 HTML 进行渲染。
另外为了使渲染逻辑和混合 html 标签和数据更简单，我会使用 T4 Run-time Text Templates. Then I can pass data to the html template and render the report simply. Then it's enough to assign the output string to a DocumentText property of a WebBrowser and call its Print 方法。
下载
您可以从 r-aghaei/HtmlUsingRuntimeT4.
克隆或下载工作示例
为什么HTML？
因为格式简单灵活。您可以使用 html 标签和 css 样式的所有功能来格式化文本。这真的比使用 DrawString.
更好
为什么 运行 时间文本模板？
因为它使混合数据和 html 变得非常容易，您可以使用 C# 语言执行一些任务，例如计算总和、迭代模型记录等。它使用 T4 模板引擎并允许您在 运行 时使用模板并将数据提供给模板。
例子
1- 将模型添加到项目中：
using System;
using System.Collections.Generic;
namespace Sample
{
public class ReportModel
{
public string CustomerName { get; set; }
public DateTime Date { get; set; }
public List<OrderItem> OrderItems { get; set; }
}
public class OrderItem
{
public string Name { get; set; }
public int Price { get; set; }
public int Count { get; set; }
}
}
2- 添加一个运行-time Text Template（也称为Preprocessed Text Template）到项目中并命名为ReportTemplate.tt。打开它并添加这样的代码：
<#@ template language="C#"#>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ parameter name="Model" type="Sample.ReportModel"#>
<html>
<head>
<title></title>
<style type="text/css">
body { font-family: Calibri;width:400px;}
table { text-align:center; }
.container {width:400px; height:100%;}
</style>
</head>
<body>
<div class="container">
<h1 style="text-align:center;">Order</h1>
<hr/>
<table style="width:100%">
<tr>
<td>Customer: <#=Model.CustomerName#></td>
<td>Order Date: <#=Model.Date#></td>
</tr>
</table>
<hr/>
<table style="width:100%">
<tr><th>Index</th><th>Name</th><th>Price</th><th>Count</th><th>Sum</th></tr>
<#
int index =1;
foreach(var item in Model.OrderItems)
{
#>
<tr>
<td><#=index#></td>
<td><#=item.Name#></td>
<td><#=item.Price#></td>
<td><#=item.Count#></td>
<td><#=item.Count * item.Price#></td>
</tr>
<#
index++;
}
var total= Model.OrderItems.Sum(x=>x.Count * x.Price);
#>
<tr><td></td><td></td><td></td><th>Total:</th><th><#=total#></th></tr>
</table>
<div>
</body>
</html>
3- 在窗体上放置一个 WebBrowser 控件并在要生成报告的地方编写这样的代码：
var rpt = new ReportTemplate();
rpt.Session = new Dictionary<string, object>();
rpt.Session["Model"] = new Sample.ReportModel
{
CustomerName = "Reza",
Date = DateTime.Now,
OrderItems = new List<Sample.OrderItem>()
{
new Sample.OrderItem(){Name="Product 1", Price =100, Count=2 },
new Sample.OrderItem(){Name="Product 2", Price =200, Count=3 },
new Sample.OrderItem(){Name="Product 3", Price =50, Count=1 },
}
};
rpt.Initialize();
this.webBrowser1.DocumentText= rpt.TransformText();
4-如需打印报告，可拨打：
this.webBrowser1.Print();
您应该在文档完成后调用 Print。所以如果你想直接打印而不向用户显示输出，你可以处理 DocumentCompleted 事件并在那里调用 Print。
结果如下：
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，我正在创建一个文本文件并使用 PrintDocument 读取它以进行打印，但我无法执行此操作，因为我不知道如何配置纸张尺寸、在纸张上对齐文本中心以及其他配置。当我打印时，文本文件打印出来了，但是很乱，打印结束后纸张就不会停止。
我该怎么做？
正在尝试。
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，但是启动打印速度很慢。我关注这个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);
}
您的热敏打印机支持 OPOS 吗？
如果是，我建议您尝试使用 Microsoft Point of Service
如果您将纯字符串发送到您的 printPage(object sender, PrintEventArgs e) 方法，它只会以看起来 'messy'（如您所命名）的所有相同字体打印纯文本
如果你想用不同的字体（粗体，常规）打印出来，你必须手动完成：
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 );
}
对我的示例的可能改进：
- 使用
graphics.MeasureString(). 可以更好地使 header 字符串居中
- 项目列表最好是企业列表class而不是纯字符串
因为这一切都是很多工作，你真的应该考虑使用 RDLC 或一些第三方软件来设计你的文档。
如果我想自己创建报告，而不是尝试创建文本文件，我将使用 HTML 进行渲染。
另外为了使渲染逻辑和混合 html 标签和数据更简单，我会使用 T4 Run-time Text Templates. Then I can pass data to the html template and render the report simply. Then it's enough to assign the output string to a DocumentText property of a WebBrowser and call its Print 方法。
下载
您可以从 r-aghaei/HtmlUsingRuntimeT4.
克隆或下载工作示例为什么HTML？
因为格式简单灵活。您可以使用 html 标签和 css 样式的所有功能来格式化文本。这真的比使用 DrawString.
为什么 运行 时间文本模板？
因为它使混合数据和 html 变得非常容易，您可以使用 C# 语言执行一些任务，例如计算总和、迭代模型记录等。它使用 T4 模板引擎并允许您在 运行 时使用模板并将数据提供给模板。
例子
1- 将模型添加到项目中：
using System;
using System.Collections.Generic;
namespace Sample
{
public class ReportModel
{
public string CustomerName { get; set; }
public DateTime Date { get; set; }
public List<OrderItem> OrderItems { get; set; }
}
public class OrderItem
{
public string Name { get; set; }
public int Price { get; set; }
public int Count { get; set; }
}
}
2- 添加一个运行-time Text Template（也称为Preprocessed Text Template）到项目中并命名为ReportTemplate.tt。打开它并添加这样的代码：
<#@ template language="C#"#>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ parameter name="Model" type="Sample.ReportModel"#>
<html>
<head>
<title></title>
<style type="text/css">
body { font-family: Calibri;width:400px;}
table { text-align:center; }
.container {width:400px; height:100%;}
</style>
</head>
<body>
<div class="container">
<h1 style="text-align:center;">Order</h1>
<hr/>
<table style="width:100%">
<tr>
<td>Customer: <#=Model.CustomerName#></td>
<td>Order Date: <#=Model.Date#></td>
</tr>
</table>
<hr/>
<table style="width:100%">
<tr><th>Index</th><th>Name</th><th>Price</th><th>Count</th><th>Sum</th></tr>
<#
int index =1;
foreach(var item in Model.OrderItems)
{
#>
<tr>
<td><#=index#></td>
<td><#=item.Name#></td>
<td><#=item.Price#></td>
<td><#=item.Count#></td>
<td><#=item.Count * item.Price#></td>
</tr>
<#
index++;
}
var total= Model.OrderItems.Sum(x=>x.Count * x.Price);
#>
<tr><td></td><td></td><td></td><th>Total:</th><th><#=total#></th></tr>
</table>
<div>
</body>
</html>
3- 在窗体上放置一个 WebBrowser 控件并在要生成报告的地方编写这样的代码：
var rpt = new ReportTemplate();
rpt.Session = new Dictionary<string, object>();
rpt.Session["Model"] = new Sample.ReportModel
{
CustomerName = "Reza",
Date = DateTime.Now,
OrderItems = new List<Sample.OrderItem>()
{
new Sample.OrderItem(){Name="Product 1", Price =100, Count=2 },
new Sample.OrderItem(){Name="Product 2", Price =200, Count=3 },
new Sample.OrderItem(){Name="Product 3", Price =50, Count=1 },
}
};
rpt.Initialize();
this.webBrowser1.DocumentText= rpt.TransformText();
4-如需打印报告，可拨打：
this.webBrowser1.Print();
您应该在文档完成后调用 Print。所以如果你想直接打印而不向用户显示输出，你可以处理 DocumentCompleted 事件并在那里调用 Print。
结果如下：