PDF管理控件Aspose.PDF for .Net使用教程（四十一）：在帶標(biāo)簽的PDF中使用表格

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Aspose.PDF for .NET是一種高PDF處理和解析API，用于在跨平臺(tái)應(yīng)用程序中執(zhí)行文檔管理和操作任務(wù)。API可以輕松用于生成、修改、轉(zhuǎn)換、渲染、保護(hù)和打印PDF文檔，而無(wú)需使用Adobe Acrobat。此外，API還提供PDF壓縮選項(xiàng)，表格創(chuàng)建和操作，圖形和圖像功能，廣泛的超鏈接功能，印章和水印任務(wù)，擴(kuò)展的安全控制和自定義字體處理。

在接下來(lái)的系列教程中，將為開(kāi)發(fā)者帶來(lái)Aspose.PDF for .NET的一系列使用教程，例如進(jìn)行文檔間的轉(zhuǎn)換，如何標(biāo)記PDF文件，如何使用表單和圖表等等。本文將介紹如何在帶標(biāo)簽的PDF中使用表格。包括：

• 在帶標(biāo)簽的PDF中創(chuàng)建表格
• 樣式表元素
• 樣式表行
• 樣式表單元

>>Aspose.PDF for .NET更新至最新版v20.7，歡迎下載體驗(yàn)。

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在帶標(biāo)簽的PDF中創(chuàng)建表格

用于.NET的Aspose.PDF允許在帶標(biāo)簽的PDF文檔中創(chuàng)建表格。為了處理表，API提供了TableElement類。為了創(chuàng)建表，可以使用ITaggedContent接口的CreateTableElement（）方法。此外，可以使用 TableElement類的CreateTHead（），CreateTBody（）和CreateTFoot（）方法分別創(chuàng)建Table Head，Table Body和Table Foot。若要?jiǎng)?chuàng)建表行，可以使用TableRowCollectionElement的 CreateTR（）方法 類。您還可以使用Document類的Validate（）方法檢查創(chuàng)建的PDF文檔是否符合PDF / UA。以下代碼段顯示了如何在“帶標(biāo)簽的PDF”文檔中創(chuàng)建表格：

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

// Create document
Document document = new Document();
ITaggedContent taggedContent = document.TaggedContent;

taggedContent.SetTitle("Example table");
taggedContent.SetLanguage("en-US");

// Get root structure element
StructureElement 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 Document
document.Save(dataDir + "CreateTableElement.pdf");

// Checking PDF/UA compliance
document = 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));

樣式表元素

用于.NET的Aspose.PDF允許樣式化Tagged PDF文檔中的表格。為了給表設(shè)置樣式，可以使用ITaggedContent 接口的CreateTableElement（） 方法 創(chuàng)建表， 并使用TableElement 類的屬性設(shè)置樣式表。以下是可用于設(shè)置表格樣式的列表屬性：

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

以下代碼段顯示了如何在“帶標(biāo)簽的PDF”文檔中設(shè)置表格樣式：

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Create document
Document document = new Document();
ITaggedContent taggedContent = document.TaggedContent;

taggedContent.SetTitle("Example table style");
taggedContent.SetLanguage("en-US");

// Get root structure element
StructureElement rootElement = taggedContent.RootElement;


// Create table structure element
TableElement 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 Document
document.Save(dataDir + "StyleTableElement.pdf");

            

// Checking PDF/UA compliance
document = 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));

樣式表行

用于.NET的Aspose.PDF允許在標(biāo)記的PDF文檔中設(shè)置表格行的樣式。為了設(shè)置表格行的樣式，可以使用TableTRElement 類的屬性。以下是可用于設(shè)置表格行樣式的列表屬性：

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

以下代碼段顯示了如何在“標(biāo)記的PDF”文檔中設(shè)置表格行的樣式：

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Create document
Document document = new Document();
ITaggedContent taggedContent = document.TaggedContent;

taggedContent.SetTitle("Example table row style");
taggedContent.SetLanguage("en-US");

// Get root structure element
StructureElement rootElement = taggedContent.RootElement;


// Create table structure element
TableElement 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 Document
document.Save(dataDir + "StyleTableRow.pdf");

// Checking PDF/UA compliance
document = 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));

樣式表單元

用于.NET的Aspose.PDF允許樣式化Tagged PDF文檔中的表格單元格。為了設(shè)置表格單元格的樣式，可以使用TableCellElement類的屬性。以下是可用于設(shè)置表格單元格樣式的列表屬性：

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

以下代碼段顯示了如何在“標(biāo)記的PDF”文檔中設(shè)置表格單元的樣式：

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Create document
Document document = new Document();
ITaggedContent taggedContent = document.TaggedContent;

taggedContent.SetTitle("Example table cell style");
taggedContent.SetLanguage("en-US");

// Get root structure element
StructureElement rootElement = taggedContent.RootElement;


// Create table structure element
TableElement 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 Document
document.Save(dataDir + "StyleTableCell.pdf");

// Checking PDF/UA compliance
document = 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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