Word格式处理控件Aspose.Words for .NET教程——为DISPLAYBARCODE字段生成自定义条形码图像

Aspose.Words for .NET是一种高级Word文档处理API，用于执行各种文档管理和操作任务。API支持生成，修改，转换，呈现和打印文档，而无需在跨平台应用程序中直接使用Microsoft Word。此外，API支持所有流行的Word处理文件格式，并允许将Word文档导出或转换为固定布局文件格式和最常用的图像/多媒体格式。

>>Aspose.Words for .NET已经更新至v20.5，提供显示/隐藏语法和拼写错误的功能，引入了可在文档内部使用水印的新帮助程序类，添加了为OOXML文档设置压缩级别的功能，体验

Aspose.Words具有用于生成自定义条形码的界面，这使得使用Aspose.Words和Aspose.BarCode一起使用非常容易，以在输出文档中呈现条形码图像。例如，您可以将包含DISPLAYBARCODE字段的DOC，OOXML或RTF文档加载到Aspose.Words中，提供自定义条形码生成器的实现并保存为固定页面格式，例如PDF，XPS等。典型的DISPLAYBARCODE字段具有以下语法：

{DISPLAYBARCODE“ SomeData” QR h 720}

下面是利用Aspose.BarCode API的示例代码生成器。本示例说明如何使用Aspose.Words和Aspose.BarCode API在Word文档中DISPLAYBARCODE字段的位置插入条形码图像。

// The path to the documents directory.string dataDir = RunExamples.GetDataDir_WorkingWithDocument();Document doc = new Document(dataDir + @"GenerateACustomBarCodeImage.docx");// Set custom barcode generatordoc.FieldOptions.BarcodeGenerator = new CustomBarcodeGenerator();doc.Save(dataDir + @"GenerateACustomBarCodeImage_out.pdf");

public class CustomBarcodeGenerator : IBarcodeGenerator{    ////// Converts barcode image height from Word units to Aspose.BarCode units.    /////////private static float ConvertSymbolHeight(string heightInTwipsString)    {        // Input value is in 1/1440 inches (twips)        int heightInTwips = int.MinValue;        int.TryParse(heightInTwipsString, out heightInTwips);        if (heightInTwips == int.MinValue)            throw new Exception("Error! Incorrect height - " + heightInTwipsString + ".");        // Convert to mm        return (float)(heightInTwips * 25.4 / 1440);    }    ////// Converts barcode image color from Word to Aspose.BarCode.    /////////private static Color ConvertColor(string inputColor)    {        // Input should be from "0x000000" to "0xFFFFFF"        int color = int.MinValue;        int.TryParse(inputColor.Replace("0x", ""), out color);        if (color == int.MinValue)            throw new Exception("Error! Incorrect color - " + inputColor + ".");        return Color.FromArgb(color >> 16, (color & 0xFF00) >> 8, color & 0xFF);        // Backword conversion -        //return string.Format("0x{0,6:X6}", mControl.ForeColor.ToArgb() & 0xFFFFFF);    }    ////// Converts bar code scaling factor from percents to float.    /////////private static float ConvertScalingFactor(string scalingFactor)    {        bool isParsed = false;        int percents = int.MinValue;        int.TryParse(scalingFactor, out percents);        if (percents != int.MinValue)        {            if (percents >= 10 && percents <= 10000) isParsed = true; } if (!isParsed) throw new Exception("Error! Incorrect scaling factor - " + scalingFactor + "."); return percents / 100.0f; } ////// Implementation of the GetBarCodeImage() method for IBarCodeGenerator interface.    /////////public Image GetBarcodeImage(Fields.BarcodeParameters parameters)    {        if (parameters.BarcodeType == null || parameters.BarcodeValue == null)            return null;        string type = parameters.BarcodeType.ToUpper();        var encodeType = EncodeTypes.None;        switch (type)        {            case "QR":                encodeType = EncodeTypes.QR;                break;            case "CODE128":                encodeType = EncodeTypes.Code128;                break;            case "CODE39":                encodeType = EncodeTypes.Code39Standard;                break;            case "EAN8":                encodeType = EncodeTypes.EAN8;                break;            case "EAN13":                encodeType = EncodeTypes.EAN13;                break;            case "UPCA":                encodeType = EncodeTypes.UPCA;                break;            case "UPCE":                encodeType = EncodeTypes.UPCE;                break;            case "ITF14":                encodeType = EncodeTypes.ITF14;                break;            case "CASE":                encodeType = EncodeTypes.None;                break;        }        if (encodeType == EncodeTypes.None)            return null;        BarcodeGenerator generator = new BarcodeGenerator(encodeType);        generator.CodeText = parameters.BarcodeValue;        if (encodeType == EncodeTypes.QR)            generator.Parameters.Barcode.CodeTextParameters.TwoDDisplayText = parameters.BarcodeValue;        if (parameters.ForegroundColor != null)            generator.Parameters.Barcode.BarColor = ConvertColor(parameters.ForegroundColor);        if (parameters.BackgroundColor != null)            generator.Parameters.BackColor = ConvertColor(parameters.BackgroundColor);        if (parameters.SymbolHeight != null)        {            generator.Parameters.ImageHeight.Millimeters = ConvertSymbolHeight(parameters.SymbolHeight);            generator.Parameters.AutoSizeMode = AutoSizeMode.Nearest;        }        generator.Parameters.Barcode.CodeTextParameters.Location = CodeLocation.None;        if (parameters.DisplayText)            generator.Parameters.Barcode.CodeTextParameters.Location = CodeLocation.Below;        generator.Parameters.CaptionAbove.Text = "";        const float scale = 1.0f; // Empiric scaling factor for converting Word barcode to Aspose.BarCode        float xdim = 1.0f;        if (encodeType == EncodeTypes.QR)        {            generator.Parameters.AutoSizeMode = AutoSizeMode.Nearest;            generator.Parameters.ImageWidth.Millimeters *= scale;            generator.Parameters.ImageHeight.Millimeters = generator.Parameters.ImageWidth.Millimeters;            xdim = generator.Parameters.ImageHeight.Millimeters / 25;            generator.Parameters.Barcode.XDimension.Millimeters = generator.Parameters.Barcode.BarHeight.Millimeters = xdim;        }        if (parameters.ScalingFactor != null)        {            float scalingFactor = ConvertScalingFactor(parameters.ScalingFactor);            generator.Parameters.ImageHeight.Millimeters *= scalingFactor;            if (encodeType == EncodeTypes.QR)            {                generator.Parameters.ImageWidth.Millimeters = generator.Parameters.ImageHeight.Millimeters;                generator.Parameters.Barcode.XDimension.Millimeters = generator.Parameters.Barcode.BarHeight.Millimeters = xdim * scalingFactor;            }            generator.Parameters.AutoSizeMode = AutoSizeMode.Nearest;        }        return generator.GenerateBarCodeImage();    }     public Image GetOldBarcodeImage(Fields.BarcodeParameters parameters)    {        throw new NotImplementedException();    }}

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