SimpleTable.vb
''
'' This code is part of GrapeCity Documents for PDF samples.
'' Copyright (c) GrapeCity, Inc. All rights reserved.
''
Imports System.IO
Imports System.Drawing
Imports System.Text
Imports System.Data
Imports System.Linq
Imports System.Collections.Generic
Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Text
Imports GrapeCity.Documents.Html

'' This sample shows how to insert an HTML table into a PDF
'' along with other (non-HTML) content.
''
'' Please see notes in comments at the top of HelloWorldHtml
'' sample code for details on adding GcHtml to your projects.
Public Class SimpleTable
    Function CreatePDF(ByVal stream As Stream) As Integer
        Const TTAG = "___TABLE___"

        '' HTML page template:
        Const tableTpl =
            "<!DOCTYPE html>" +
            "<html>" +
            "<head>" +
            "<style>" +
            "html * {" +
            "  font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif !important;" +
            "}" +
            "h1 {" +
            "  color: #fcf3cf;" +
            "  background-color: #2471a3;" +
            "  text-align: center;" +
            "  padding: 6px;" +
            "  margin-bottom: 0px;" +
            "}" +
            "table {" +
            "  border-bottom: 1px solid #ddd;" +
            "}" +
            "thead {display: table-header-group;}" +
            "#employees {" +
            "  font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif;" +
            "  border-collapse: collapse;" +
            "  width: 100%;" +
            "}" +
            "#employees td, #employees th {" +
            "  border: 0px solid #ddd;" +
            "  padding: 8px;" +
            "}" +
            "#employees tr:nth-child(even){background-color: #d4e6f1;}" +
            "#employees tr:hover {background-color: #ddd;}" +
            "#employees th {" +
            "  padding-top: 12px;" +
            "  padding-bottom: 12px;" +
            "  text-align: left;" +
            "  background-color: #2980b9;" +
            "  color: white;" +
            "}" +
            "</style>" +
            "</head>" +
            "<body>" +
            TTAG +
            "</body>" +
            "</html>"

        Const tableHead = "<h1>Employees</h1>"

        Const tableFmt =
            "<table id='employees'>" +
            "  <thead>" +
            "    <th>Name</th>" +
            "    <th>Address</th>" +
            "    <th>Country</th>" +
            "  </thead>" +
            "{0}" +
            "</table>"

        Const dataRowFmt =
            "  <tr>" +
            "    <td>{0}</td>" +
            "    <td>{1}</td>" +
            "    <td>{2}</td>" +
            "  </tr>"

        '' Create a new PDF document:
        Dim doc = New GcPdfDocument()
        '' Add a page:
        Dim Page = doc.NewPage()
        '' Get page graphics:
        Dim g = Page.Graphics

        Dim nrc = Util.AddNote(
            "Here we build an HTML table with data fetched from an XML database, " +
            "and insert it into the current PDF page. " +
            "A footer is added below the table based on the rendered table size " +
            "returned by the GcPdfGraphics.DrawHtml() method.",
            Page)

        '' Get employees data from the sample NorthWind database:
        Using ds = New DataSet()
            ds.ReadXml(Path.Combine("Resources", "data", "GcNWind.xml"))
            Dim dtEmps = ds.Tables("Employees")
            Dim emps =
                From emp In dtEmps.Select()
                Order By emp("LastName")
                Select New With
                    {
                        .Name = emp("LastName") + ", " + emp("FirstName"),
                        .Address = emp("Address"),
                        .Country = emp("Country")
                    }

            '' Build the HTML table:
            Dim sb = New StringBuilder()
            sb.AppendLine(tableHead)
            For Each emp In emps
                sb.AppendFormat(dataRowFmt, emp.Name, emp.Address, emp.Country)
            Next

            Dim html = tableTpl.Replace(TTAG, String.Format(tableFmt, sb.ToString()))

            '' Render HTML.
            '' The return value indicates whether anything has been rendered.
            '' The output parameter size returns the actual size of the rendered content.
            Dim size As SizeF
            Dim ok = g.DrawHtml(
                html, nrc.Left, nrc.Bottom + 36,
                New HtmlToPdfFormat(False) With {.MaxPageWidth = nrc.Width / 72},
                size)

            Util.AddNote(
                "This text is added below the HTML table. Its position is determined " +
                "by the rendered size returned by GcPdfGraphics.DrawHtml().",
                Page,
                New RectangleF(nrc.Left, nrc.Bottom + size.Height + 72, nrc.Width, Integer.MaxValue))
        End Using
        '' Done.
        doc.Save(stream)
        Return doc.Pages.Count
    End Function
End Class