Question

我正在使用带有Winforms的C＃创建应用程序，现在我需要在热敏打印机上打印销售收据。要做到这一点，我要创建一个文本文件并使用PrintDocument将其读取以进行打印，但我不能这样做，因为我不知道如何配置纸张大小，在文件中对齐文本中心，和其他配置。当我打印文本文件打印，但所有杂乱，并在打印结束后，纸张不会停止。

我怎么能这样做？

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);
}

我正在尝试创建此收据模式。

使用RDLC，但开始打印速度非常慢。我跟着这个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);
}

Answer 1

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，我使用T4 Run-time Text Templates。然后我可以将数据传递给html模板并简单地呈现报告。然后，它足以将输出字符串分配给WebBrowser的DocumentText属性并调用其Print方法。

<强> 下载

您可以从r-aghaei/HtmlUsingRuntimeT4 克隆或下载工作示例。

为何选择HTML？

由于格式简单灵活。您可以使用html标签和css样式的所有功能来格式化文本。它比使用DrawString要好。

为何选择运行时文本模板？

因为它使混合数据和html变得非常简单，你可以使用C＃语言执行一些任务，如计算总和，迭代模型记录等等。它使用T4模板引擎，允许您在运行时使用模板并将数据提供给模板。

示例

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-将一个运行时文本模板（也称为预处理文本模板）添加到项目中，并将其命名为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-在表单上放置WebBrowser控件，并在要生成报告的位置编写此类代码：

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-如果要打印报告，可以致电：

this.webBrowser1.Print();

文档完成后，您应该致电Print。因此，如果您想直接打印而不向用户显示输出，则可以处理DocumentCompleted事件并在那里调用Print。

结果如下：

Answer 2

如果您向printPage(object sender, PrintEventArgs e)方法发送一个纯字符串，它只会打印所有相同字体的纯文本，这些字体看起来很“混乱”（如您所说）如果您希望使用不同的字体（粗体，常规）进行格式化打印，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 );
}

我的例子可能有所改进：

使用graphics.MeasureString()可以更好地对标题字符串进行居中。
项目列表最好是一个普通字符串的商业类列表

因为这一切都很多，所以你应该考虑使用RDLC或某些第三方软件来设计你的文档。

Answer 3

您的热敏打印机是否支持OPOS？

如果是，我建议您尝试使用Microsoft Point of Service

如何使用PrintDocument在热敏打印机上打印文本文件？

3 个答案: