PDF管理控件Aspose.PDF for .Net使用教程（四十一）：在带标签的PDF中使用表格

Aspose.PDF for .NET是一种高PDF处理和解析API，用于在跨平台应用程序中执行文档管理和操作任务。API可以轻松用于生成、修改、转换、渲染、保护和打印PDF文档，而无需使用AdobeAcrobat。此外，API还提供PDF压缩选项，表格创建和操作，图形和图像功能，广泛的超链接功能，印章和水印任务，扩展的安全控制和自定义字体处理。

• 在带标签的PDF中创建表格
• 样式表元素
• 样式表行
• 样式表单元

>>Aspose.PDF for .NET更新至最新版v20.7，欢迎下载体验。

在带标签的PDF中创建表格

用于.NET的Aspose.PDF允许在带标签的PDF文档中创建表格。为了处理表，API提供了TableElement类。为了创建表，可以使用ITaggedContent接口的CreateTableElement（）方法。此外，可以使用 TableElement类的CreateTHead（），CreateTBody（）和CreateTFoot（）方法分别创建Table Head，Table Body和Table Foot。若要创建表行，可以使用TableRowCollectionElement的 CreateTR（）方法 类。您还可以使用Document类的Validate（）方法检查创建的PDF文档是否符合PDF / UA。以下代码段显示了如何在“带标签的PDF”文档中创建表格：

// The path to the documents directory.string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();// Create documentDocument document = new Document();ITaggedContent taggedContent = document.TaggedContent;taggedContent.SetTitle("Example table");taggedContent.SetLanguage("en-US");// Get root structure elementStructureElement rootElement = taggedContent.RootElement;TableElement tableElement = taggedContent.CreateTableElement();rootElement.AppendChild(tableElement);tableElement.Border = new BorderInfo(BorderSide.All, 1.2F, Color.DarkBlue);TableTHeadElement tableTHeadElement = tableElement.CreateTHead();TableTBodyElement tableTBodyElement = tableElement.CreateTBody();TableTFootElement tableTFootElement = tableElement.CreateTFoot();int rowCount = 50;int colCount = 4;int rowIndex;int colIndex;TableTRElement headTrElement = tableTHeadElement.CreateTR();headTrElement.AlternativeText = "Head Row";headTrElement.BackgroundColor = Color.LightGray;for (colIndex = 0; colIndex < colCount; colIndex++){    TableTHElement thElement = headTrElement.CreateTH();    thElement.SetText(String.Format("Head {0}", colIndex));    thElement.BackgroundColor = Color.GreenYellow;    thElement.Border = new BorderInfo(BorderSide.All, 4.0F, Color.Gray);    thElement.IsNoBorder = true;    thElement.Margin = new MarginInfo(16.0, 2.0, 8.0, 2.0);    thElement.Alignment = HorizontalAlignment.Right;}for (rowIndex = 0; rowIndex < rowCount; rowIndex++){    TableTRElement trElement = tableTBodyElement.CreateTR();    trElement.AlternativeText = String.Format("Row {0}", rowIndex);    for (colIndex = 0; colIndex < colCount; colIndex++)    {        int colSpan = 1;        int rowSpan = 1;        if (colIndex == 1 && rowIndex == 1)        {            colSpan = 2;            rowSpan = 2;        }        else if (colIndex == 2 && (rowIndex == 1 || rowIndex == 2))        {            continue;        }        else if (rowIndex == 2 && (colIndex == 1 || colIndex == 2))        {            continue;        }        TableTDElement tdElement = trElement.CreateTD();        tdElement.SetText(String.Format("Cell [{0}, {1}]", rowIndex, colIndex));        tdElement.BackgroundColor = Color.Yellow;        tdElement.Border = new BorderInfo(BorderSide.All, 4.0F, Color.Gray);        tdElement.IsNoBorder = false;        tdElement.Margin = new MarginInfo(8.0, 2.0, 8.0, 2.0);        tdElement.Alignment = HorizontalAlignment.Center;        TextState cellTextState = new TextState();        cellTextState.ForegroundColor = Color.DarkBlue;        cellTextState.FontSize = 7.5F;        cellTextState.FontStyle = FontStyles.Bold;        cellTextState.Font = FontRepository.FindFont("Arial");        tdElement.DefaultCellTextState = cellTextState;        tdElement.IsWordWrapped = true;        tdElement.VerticalAlignment = VerticalAlignment.Center;        tdElement.ColSpan = colSpan;        tdElement.RowSpan = rowSpan;    }}TableTRElement footTrElement = tableTFootElement.CreateTR();footTrElement.AlternativeText = "Foot Row";footTrElement.BackgroundColor = Color.LightSeaGreen;for (colIndex = 0; colIndex < colCount; colIndex++){    TableTDElement tdElement = footTrElement.CreateTD();    tdElement.SetText(String.Format("Foot {0}", colIndex));    tdElement.Alignment = HorizontalAlignment.Center;    tdElement.StructureTextState.FontSize = 7F;    tdElement.StructureTextState.FontStyle = FontStyles.Bold;}StructureAttributes tableAttributes = tableElement.Attributes.GetAttributes(AttributeOwnerStandard.Table);StructureAttribute summaryAttribute = new StructureAttribute(AttributeKey.Summary);summaryAttribute.SetStringValue("The summary text for table");tableAttributes.SetAttribute(summaryAttribute);// Save Tagged Pdf Documentdocument.Save(dataDir + "CreateTableElement.pdf");// Checking PDF/UA compliancedocument = new Document(dataDir + "CreateTableElement.pdf");bool isPdfUaCompliance = document.Validate(dataDir + "table.xml", PdfFormat.PDF_UA_1);Console.WriteLine(String.Format("PDF/UA compliance: {0}", isPdfUaCompliance));

样式表元素

用于.NET的Aspose.PDF允许样式化Tagged PDF文档中的表格。为了给表设置样式，可以使用ITaggedContent 接口的CreateTableElement（） 方法 创建表， 并使用TableElement 类的属性设置样式表。以下是可用于设置表格样式的列表属性：

• BackgroundColor
• Border
• Alignment
• CornerStyle
• Broken
• ColumnAdjustment
• ColumnWidths
• DefaultCellBorder
• DefaultCellPadding
• DefaultCellTextState
• DefaultColumnWidth
• IsBroken
• IsBordersIncluded
• Left
• Top

以下代码段显示了如何在“带标签的PDF”文档中设置表格样式：

// The path to the documents directory.string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();// Create documentDocument document = new Document();ITaggedContent taggedContent = document.TaggedContent;taggedContent.SetTitle("Example table style");taggedContent.SetLanguage("en-US");// Get root structure elementStructureElement rootElement = taggedContent.RootElement;// Create table structure elementTableElement tableElement = taggedContent.CreateTableElement();rootElement.AppendChild(tableElement);tableElement.BackgroundColor = Color.Beige;tableElement.Border = new BorderInfo(BorderSide.All, 0.80F, Color.Gray);tableElement.Alignment = HorizontalAlignment.Center;tableElement.Broken = TableBroken.Vertical;tableElement.ColumnAdjustment = ColumnAdjustment.AutoFitToWindow;tableElement.ColumnWidths = "80 80 80 80 80";tableElement.DefaultCellBorder = new BorderInfo(BorderSide.All, 0.50F, Color.DarkBlue);tableElement.DefaultCellPadding = new MarginInfo(16.0, 2.0, 8.0, 2.0);tableElement.DefaultCellTextState.ForegroundColor = Color.DarkCyan;tableElement.DefaultCellTextState.FontSize = 8F;tableElement.DefaultColumnWidth = "70";tableElement.IsBroken = false;tableElement.IsBordersIncluded = true;tableElement.Left = 0F;tableElement.Top = 40F;tableElement.RepeatingColumnsCount = 2;tableElement.RepeatingRowsCount = 3;TextState rowStyle = new TextState();rowStyle.BackgroundColor = Color.LightCoral;tableElement.RepeatingRowsStyle = rowStyle;TableTHeadElement tableTHeadElement = tableElement.CreateTHead();TableTBodyElement tableTBodyElement = tableElement.CreateTBody();TableTFootElement tableTFootElement = tableElement.CreateTFoot();int rowCount = 10;int colCount = 5;int rowIndex;int colIndex;TableTRElement headTrElement = tableTHeadElement.CreateTR();headTrElement.AlternativeText = "Head Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTHElement thElement = headTrElement.CreateTH();    thElement.SetText(String.Format("Head {0}", colIndex));}for (rowIndex = 0; rowIndex < rowCount; rowIndex++){    TableTRElement trElement = tableTBodyElement.CreateTR();    trElement.AlternativeText = String.Format("Row {0}", rowIndex);    for (colIndex = 0; colIndex < colCount; colIndex++)    {        TableTDElement tdElement = trElement.CreateTD();        tdElement.SetText(String.Format("Cell [{0}, {1}]", rowIndex, colIndex));    }}TableTRElement footTrElement = tableTFootElement.CreateTR();footTrElement.AlternativeText = "Foot Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTDElement tdElement = footTrElement.CreateTD();    tdElement.SetText(String.Format("Foot {0}", colIndex));}// Save Tagged Pdf Documentdocument.Save(dataDir + "StyleTableElement.pdf");            // Checking PDF/UA compliancedocument = new Document(dataDir + "StyleTableElement.pdf");bool isPdfUaCompliance = document.Validate(dataDir + "StyleTableElement.xml", PdfFormat.PDF_UA_1);Console.WriteLine(String.Format("PDF/UA compliance: {0}", isPdfUaCompliance));

样式表行

用于.NET的Aspose.PDF允许在标记的PDF文档中设置表格行的样式。为了设置表格行的样式，可以使用TableTRElement 类的属性。以下是可用于设置表格行样式的列表属性：

• BackgroundColor
• Border
• DefaultCellBorder
• MinRowHeight
• FixedRowHeight
• IsInNewPage
• IsRowBroken
• DefaultCellTextState
• DefaultCellPadding
• VerticalAlignment

以下代码段显示了如何在“标记的PDF”文档中设置表格行的样式：

// The path to the documents directory.string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();// Create documentDocument document = new Document();ITaggedContent taggedContent = document.TaggedContent;taggedContent.SetTitle("Example table row style");taggedContent.SetLanguage("en-US");// Get root structure elementStructureElement rootElement = taggedContent.RootElement;// Create table structure elementTableElement tableElement = taggedContent.CreateTableElement();rootElement.AppendChild(tableElement);TableTHeadElement tableTHeadElement = tableElement.CreateTHead();TableTBodyElement tableTBodyElement = tableElement.CreateTBody();TableTFootElement tableTFootElement = tableElement.CreateTFoot();int rowCount = 7;int colCount = 3;int rowIndex;int colIndex;TableTRElement headTrElement = tableTHeadElement.CreateTR();headTrElement.AlternativeText = "Head Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTHElement thElement = headTrElement.CreateTH();    thElement.SetText(String.Format("Head {0}", colIndex));}for (rowIndex = 0; rowIndex < rowCount; rowIndex++){    TableTRElement trElement = tableTBodyElement.CreateTR();    trElement.AlternativeText = String.Format("Row {0}", rowIndex);    trElement.BackgroundColor = Color.LightGoldenrodYellow;    trElement.Border = new BorderInfo(BorderSide.All, 0.75F, Color.DarkGray);    trElement.DefaultCellBorder = new BorderInfo(BorderSide.All, 0.50F, Color.Blue);    trElement.MinRowHeight = 100.0;    trElement.FixedRowHeight = 120.0;    trElement.IsInNewPage = (rowIndex % 3 == 1);    trElement.IsRowBroken = true;    TextState cellTextState = new TextState();    cellTextState.ForegroundColor = Color.Red;    trElement.DefaultCellTextState = cellTextState;    trElement.DefaultCellPadding = new MarginInfo(16.0, 2.0, 8.0, 2.0);    trElement.VerticalAlignment = VerticalAlignment.Bottom;    for (colIndex = 0; colIndex < colCount; colIndex++)    {        TableTDElement tdElement = trElement.CreateTD();        tdElement.SetText(String.Format("Cell [{0}, {1}]", rowIndex, colIndex));    }}TableTRElement footTrElement = tableTFootElement.CreateTR();footTrElement.AlternativeText = "Foot Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTDElement tdElement = footTrElement.CreateTD();    tdElement.SetText(String.Format("Foot {0}", colIndex));}// Save Tagged Pdf Documentdocument.Save(dataDir + "StyleTableRow.pdf");// Checking PDF/UA compliancedocument = new Document(dataDir + "StyleTableRow.pdf");bool isPdfUaCompliance = document.Validate(dataDir + "StyleTableRow.xml", PdfFormat.PDF_UA_1);Console.WriteLine(String.Format("PDF/UA compliance: {0}", isPdfUaCompliance));

样式表单元

用于.NET的Aspose.PDF允许样式化Tagged PDF文档中的表格单元格。为了设置表格单元格的样式，可以使用TableCellElement类的属性。以下是可用于设置表格单元格样式的列表属性：

• BackgroundColor
• Border
• IsNoBorder
• Margin
• Alignment
• DefaultCellTextState
• IsWordWrapped
• VerticalAlignment
• ColSpan
• RowSpan

以下代码段显示了如何在“标记的PDF”文档中设置表格单元的样式：

// The path to the documents directory.string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();// Create documentDocument document = new Document();ITaggedContent taggedContent = document.TaggedContent;taggedContent.SetTitle("Example table cell style");taggedContent.SetLanguage("en-US");// Get root structure elementStructureElement rootElement = taggedContent.RootElement;// Create table structure elementTableElement tableElement = taggedContent.CreateTableElement();rootElement.AppendChild(tableElement);TableTHeadElement tableTHeadElement = tableElement.CreateTHead();TableTBodyElement tableTBodyElement = tableElement.CreateTBody();TableTFootElement tableTFootElement = tableElement.CreateTFoot();int rowCount = 4;int colCount = 4;int rowIndex;int colIndex;TableTRElement headTrElement = tableTHeadElement.CreateTR();headTrElement.AlternativeText = "Head Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTHElement thElement = headTrElement.CreateTH();    thElement.SetText(String.Format("Head {0}", colIndex));    thElement.BackgroundColor = Color.GreenYellow;    thElement.Border = new BorderInfo(BorderSide.All, 4.0F, Color.Gray);    thElement.IsNoBorder = true;    thElement.Margin = new MarginInfo(16.0, 2.0, 8.0, 2.0);    thElement.Alignment = HorizontalAlignment.Right;}for (rowIndex = 0; rowIndex < rowCount; rowIndex++){    TableTRElement trElement = tableTBodyElement.CreateTR();    trElement.AlternativeText = String.Format("Row {0}", rowIndex);    for (colIndex = 0; colIndex < colCount; colIndex++)    {        int colSpan = 1;        int rowSpan = 1;        if (colIndex == 1 && rowIndex == 1)        {            colSpan = 2;            rowSpan = 2;        }        else if (colIndex == 2 && (rowIndex == 1 || rowIndex == 2))        {            continue;        }        else if (rowIndex == 2 && (colIndex == 1 || colIndex == 2))        {            continue;        }        TableTDElement tdElement = trElement.CreateTD();        tdElement.SetText(String.Format("Cell [{0}, {1}]", rowIndex, colIndex));        tdElement.BackgroundColor = Color.Yellow;        tdElement.Border = new BorderInfo(BorderSide.All, 4.0F, Color.Gray);        tdElement.IsNoBorder = false;        tdElement.Margin = new MarginInfo(8.0, 2.0, 8.0, 2.0);        tdElement.Alignment = HorizontalAlignment.Center;        TextState cellTextState = new TextState();        cellTextState.ForegroundColor = Color.DarkBlue;        cellTextState.FontSize = 7.5F;        cellTextState.FontStyle = FontStyles.Bold;        cellTextState.Font = FontRepository.FindFont("Arial");        tdElement.DefaultCellTextState = cellTextState;        tdElement.IsWordWrapped = true;        tdElement.VerticalAlignment = VerticalAlignment.Center;        tdElement.ColSpan = colSpan;        tdElement.RowSpan = rowSpan;    }}TableTRElement footTrElement = tableTFootElement.CreateTR();footTrElement.AlternativeText = "Foot Row";for (colIndex = 0; colIndex < colCount; colIndex++){    TableTDElement tdElement = footTrElement.CreateTD();    tdElement.SetText(String.Format("Foot {0}", colIndex));}// Save Tagged Pdf Documentdocument.Save(dataDir + "StyleTableCell.pdf");// Checking PDF/UA compliancedocument = new Document(dataDir + "StyleTableCell.pdf");bool isPdfUaCompliance = document.Validate(dataDir + "StyleTableCell.xml", PdfFormat.PDF_UA_1);Console.WriteLine(String.Format("PDF/UA compliance: {0}", isPdfUaCompliance));

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