从数据源渲染表格

Aspose.PDF 允许您使用 PdfLightTable 类从 DataSet、数据表、数组和 IEnumerable 对象创建带有数据源的表格。

Table 类 用于处理表格。此类使我们能够创建表格并将其放置在文档中，使用 Rows 和 Cells。因此，要创建表格，您需要添加所需数量的行并用适当数量的单元格填充它们。

以下示例创建了一个 4x10 的表格。

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTable()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        // Add page
        var page = document.Pages.Add();

        var table = new Aspose.Pdf.Table
        {
            // Set column auto widths of the table
            ColumnWidths = "25% 25% 25% 25%",

            // Set cell padding
            DefaultCellPadding = new Aspose.Pdf.MarginInfo(10, 5, 10, 5), // Left Bottom Right Top

            // Set the table border color as Green
            Border = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .5f, Aspose.Pdf.Color.Green),

            // Set the border for table cells as Black
            DefaultCellBorder = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .2f, Aspose.Pdf.Color.Green),
        };

        for (var rowCount = 0; rowCount < 10; rowCount++)
        {
            // Add row to table
            var row = table.Rows.Add();

            // Add table cells
            for (int i = 0; i < 4; i++)
            {
                row.Cells.Add($"Cell ({i + 1}, {rowCount + 1})");
            }
        }

        // Add table object to first page of input document
        page.Paragraphs.Add(table);

        // Save PDF document
        document.Save(dataDir + "AddTable_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTable()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

    // Create PDF document
    using var document = new Aspose.Pdf.Document();

    // Add page
    var page = document.Pages.Add();

    var table = new Aspose.Pdf.Table
    {
        // Set column auto widths of the table
        ColumnWidths = "25% 25% 25% 25%",

        // Set cell padding
        DefaultCellPadding = new Aspose.Pdf.MarginInfo(10, 5, 10, 5), // Left Bottom Right Top

        // Set the table border color as Green
        Border = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .5f, Aspose.Pdf.Color.Green),

        // Set the border for table cells as Black
        DefaultCellBorder = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .2f, Aspose.Pdf.Color.Green),
    };

    for (var rowCount = 0; rowCount < 10; rowCount++)
    {
        // Add row to table
        var row = table.Rows.Add();

        // Add table cells
        for (int i = 0; i < 4; i++)
        {
            row.Cells.Add($"Cell ({i + 1}, {rowCount + 1})");
        }
    }

    // Add table object to first page of input document
    page.Paragraphs.Add(table);

    // Save PDF document
    document.Save(dataDir + "AddTable_out.pdf");
}

在初始化 Table 对象时，使用了最小的皮肤设置：

• ColumnWidths - 列的宽度（默认）。
• DefaultCellPadding - 表格单元格的默认字段。
• Border - 表格框架属性（样式、厚度、颜色）。
• DefaultCellBorder - 单元格框架的属性（样式、厚度、颜色）。

从对象数组导出数据

Table 类提供了与 ADO.NET 数据源交互的方法 - ImportDataTable 和 ImportDataView。第一个方法从 DataTable 导入数据，第二个方法从 DataView 导入数据。 假设这些对象在 MVC 模板中不太方便使用，我们将限制在一个简短的示例中。在此示例中（第 50 行），调用 ImportDataTable 方法，并接收 DataTable 实例和其他设置（如标题标志和数据输出的初始位置（行/列））作为参数。

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTable()
{
    // Create PDF document
    using (var document = new Aspose.Pdf.Document
    {
        PageInfo = new Aspose.Pdf.PageInfo { Margin = new Aspose.Pdf.MarginInfo(28, 28, 28, 42) }
    })
    {
        var table = new Aspose.Pdf.Table
        {
            // Set column widths of the table
            ColumnWidths = "25% 25% 25% 25%",
            // Set cell padding
            DefaultCellPadding = new Aspose.Pdf.MarginInfo(10, 5, 10, 5), // Left Bottom Right Top
            // Set the table border color as Green
            Border = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .5f, Aspose.Pdf.Color.Green),
            // Set the border for table cells as Black
            DefaultCellBorder = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .2f, Aspose.Pdf.Color.Green),
        };

        var configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("config.json", false)
            .Build();

        var connectionString = configuration.GetSection("connectionString").Value;

        if (string.IsNullOrEmpty(connectionString))
        {
            throw new ArgumentException("No connection string in config.json");
        }

        var resultTable = new DataTable();

        using (var conn = new SqlConnection(connectionString))
        {
            const string sql = "SELECT * FROM Tennats";
            using (var cmd = new SqlCommand(sql, conn))
            {
                using (var adapter = new SqlDataAdapter(cmd))
                {
                    adapter.Fill(resultTable);
                }
            }
        }

        table.ImportDataTable(resultTable, true, 1, 1);

        // Add table object to first page of input document
        document.Pages[1].Paragraphs.Add(table);

        using (var streamOut = new MemoryStream())
        {
            // Save PDF document
            document.Save(streamOut);

            return new FileContentResult(streamOut.ToArray(), "application/pdf")
            {
                FileDownloadName = "demotable2.pdf"
            };
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddTable()
{
    // Create PDF document
    using var document = new Aspose.Pdf.Document
    {
        PageInfo = new Aspose.Pdf.PageInfo { Margin = new Aspose.Pdf.MarginInfo(28, 28, 28, 42) }
    };

    var table = new Aspose.Pdf.Table
    {
        // Set column widths of the table
        ColumnWidths = "25% 25% 25% 25%",
        // Set cell padding
        DefaultCellPadding = new Aspose.Pdf.MarginInfo(10, 5, 10, 5), // Left Bottom Right Top
        // Set the table border color as Green
        Border = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .5f, Aspose.Pdf.Color.Green),
        // Set the border for table cells as Black
        DefaultCellBorder = new Aspose.Pdf.BorderInfo(Aspose.Pdf.BorderSide.All, .2f, Aspose.Pdf.Color.Green),
    };

    var configuration = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("config.json", false)
        .Build();

    var connectionString = configuration.GetSection("connectionString").Value;

    if (string.IsNullOrEmpty(connectionString))
    {
        throw new ArgumentException("No connection string in config.json");
    }

    var resultTable = new DataTable();

    using var conn = new SqlConnection(connectionString);

    const string sql = "SELECT * FROM Tennats";

    using var cmd = new SqlCommand(sql, conn);

    using var adapter = new SqlDataAdapter(cmd);
    
    adapter.Fill(resultTable);

    table.ImportDataTable(resultTable, true, 1, 1);

    // Add table object to first page of input document
    document.Pages[1].Paragraphs.Add(table);

    using var streamOut = new MemoryStream();
    
    // Save PDF document
    document.Save(streamOut);

    return new FileContentResult(streamOut.ToArray(), "application/pdf")
    {
        PageInfo = new Aspose.Pdf.PageInfo { Margin = new Aspose.Pdf.MarginInfo(28, 28, 28, 42) }
    };
}