'''' This code is part of Document Solutions for PDF .NET demos.'' Copyright (c) MESCIUS inc. All rights reserved.''Imports System.DrawingImports System.IOImports System.LinqImports System.XmlImports System.TextImports System.Collections.GenericImports GrapeCity.Documents.PdfImports GrapeCity.Documents.Pdf.AcroFormsImports GrapeCity.Documents.Pdf.ActionsImports GrapeCity.Documents.Pdf.AnnotationsImports GrapeCity.Documents.Text
'' NOTE: This sample is obsolete as of DsPdf v3. Please see the new FormDataSubmit'' sample for a better solution.'''' This sample creates an AcroForm PDF that can be submitted to the server.'' It relies on the server to put the submitted data into an XML,'' import that XML into a PDF containing a similar form,'' And send the form with loaded data back to the client.'' Note that the produced PDF with filled form fields'' Is shown in the client browser's default PDF viewer.'' The code Is similar to FormSubmit.Public Class FormSubmitXml    Function CreatePDF(ByVal stream As Stream) As Integer        Dim doc = New GcPdfDocument()        Dim page = doc.NewPage()
        Dim rc = Util.AddNote("Fill the fields in the form and click 'Submit' to send it back to the server. " +            "The sample server will put the submitted data into an XML, feed that XML" +            "to a PDF with a different but compatible form, and send the resulting form" +            "filled with the submitted data back to your browser." +            "Note that the form with the submitted data is opened in the browser's default PDF viewer," +            "and does not have the 'Submit' and 'Reset' buttons.", page)
        Dim g = page.Graphics        Dim tf = New TextFormat() With {.Font = StandardFonts.Times, .FontSize = 14}        Dim ip = New PointF(72, rc.Bottom + 36)        Dim fldOffset = 72 * 2 + 46        Dim fldHeight = tf.FontSize * 1.2F        Dim dY = 32
        '' Text field        g.DrawString("First name:", tf, ip)        Dim fldFirstName = New TextField() With {.Name = "FirstName", .Value = "John"}        fldFirstName.Widget.Page = page        fldFirstName.Widget.Rect = New RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight)        fldFirstName.Widget.DefaultAppearance.Font = tf.Font        fldFirstName.Widget.DefaultAppearance.FontSize = tf.FontSize        doc.AcroForm.Fields.Add(fldFirstName)        ip.Y += dY
        '' Text field        g.DrawString("Last name:", tf, ip)        Dim fldLastName = New TextField() With {.Name = "LastName", .Value = "Smith"}        fldLastName.Widget.Page = page        fldLastName.Widget.Rect = New RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight)        fldLastName.Widget.DefaultAppearance.Font = tf.Font        fldLastName.Widget.DefaultAppearance.FontSize = tf.FontSize        doc.AcroForm.Fields.Add(fldLastName)        ip.Y += dY
        '' Checkbox        g.DrawString("Subscribe to Mailing List:", tf, ip)        Dim fldCheckbox = New CheckBoxField() With {.Name = "Subscribe", .Checked = True}        fldCheckbox.Widget.Page = page        fldCheckbox.Widget.Rect = New RectangleF(ip.X + fldOffset, ip.Y, fldHeight, fldHeight)        doc.AcroForm.Fields.Add(fldCheckbox)        ip.Y += dY
        '' Multiline TextBox        g.DrawString("Additional information:", tf, ip)        Dim fldAdditionalInfo = New TextField() With {.Name = "AdditionalInfo", .Multiline = True}        fldAdditionalInfo.Widget.Page = page        fldAdditionalInfo.Widget.Rect = New RectangleF(ip.X + fldOffset, ip.Y, 72 * 3, fldHeight * 2)        fldAdditionalInfo.Widget.DefaultAppearance.Font = tf.Font        fldAdditionalInfo.Widget.DefaultAppearance.FontSize = tf.FontSize        doc.AcroForm.Fields.Add(fldAdditionalInfo)        ip.Y += dY * 2
        '' Submit form button:        Dim btnSubmit = New PushButtonField()        btnSubmit.Widget.Rect = New RectangleF(ip.X + fldOffset, ip.Y, 72, fldHeight)        btnSubmit.Widget.ButtonAppearance.Caption = "Submit"        btnSubmit.Widget.Highlighting = HighlightingMode.Invert        btnSubmit.Widget.Page = page
        '' The URL for the submission        btnSubmit.Widget.Activate = New ActionSubmitForm("/Samples/HandleFormSubmitXml")        doc.AcroForm.Fields.Add(btnSubmit)
        '' Reset form button:        Dim btnReset = New PushButtonField()        btnReset.Widget.Rect = New RectangleF(ip.X + fldOffset + 72 * 1.5F, ip.Y, 72, fldHeight)        btnReset.Widget.ButtonAppearance.Caption = "Reset"        btnReset.Widget.Highlighting = HighlightingMode.Invert        btnReset.Widget.Page = page        btnReset.Widget.Activate = New ActionResetForm()        doc.AcroForm.Fields.Add(btnReset)        ip.Y += dY
        '' Done        doc.Save(stream)        Return doc.Pages.Count    End Function
    ''    '' NOTE: the code below Is used by the web sample browser controller When the form    '' prepared by this sample Is submitted, it Is Not directly called by the CreatePDF() method.    ''
    '' Creates a GcPdfDocument, loads an AcroForm PDF into it, And fills it with data    '' using the GcPdfDocument.ImportFormDataFromXML() method.    ''    '' This method Is called by the samples controller when the form prepared by this sample    '' Is submitted by the user. The samples controller parses the client response And builds    '' the 'values' collection filling it with the submitted field values, then calls    '' this method to prepare the XML, imports it into a newly created PDF, And returns    '' the resulting PDF to the controller, which sends it back to the client.    Public Shared Function ImportFormData(ByVal values As List(Of FieldExportEntry)) As Stream        Dim pdf = New GcPdfDocument()        Using fs = New FileStream(Path.Combine("Resources", "PDFs", "ImportFormXML.pdf"), FileMode.Open, FileAccess.Read)            pdf.Load(fs)            Using ms = New MemoryStream()                SaveFieldsToXML(values, ms)                ms.Seek(0, SeekOrigin.Begin)                pdf.ImportFormDataFromXML(ms)            End Using            Dim outMs = New MemoryStream()            pdf.Save(outMs)            outMs.Seek(0, SeekOrigin.Begin)            Return outMs        End Using    End Function
    '' Represents a form field And its value(s) for export to XML.    Public Class FieldExportEntry        Public Property Name As String        Public Property Values As List(Of String)        '' Note: this sample does Not support child fields:        '' public List<FieldTreeNode> Children { get set }    End Class
    '' Saves the fields And their values to a stream.    ''    '' This method Is similar to GcPdfDocument.ExportFormDataToXML(), with the following    '' important limitations:    '' - it does Not support child fields (field.Children collection)    '' - it does Not handle fields with names that are Not valid XML names (xfdf:original).    Public Shared Sub SaveFieldsToXML(ByVal values As List(Of FieldExportEntry), ByVal stream As Stream)        Dim xws = New XmlWriterSettings() With            {                .Indent = True,                .CloseOutput = False,                .Encoding = Encoding.UTF8            }        Using xw = XmlWriter.Create(stream, xws)            xw.WriteStartElement("fields")            xw.WriteAttributeString("xmlns", "xfdf", Nothing, "http:''ns.adobe.com/xfdf-transition/")            For Each ftn In values                xw.WriteStartElement(ftn.Name)                For Each v In ftn.Values                    xw.WriteStartElement("value")                    '' NOTE: the values In the array are formed by the client PDF viewer,                    '' And it represents 'on' checkbox values as 'true', while ImportFormDataFromXML                    '' expects 'on' values to be represented as "Yes" (that's how ExportFormDataToXML                    '' works, similar to Acrobat). This here Is a quick And dirty hack just for the                    '' sake of this sample:                    If v = "true" Then                        xw.WriteString("Yes")                    Else                        xw.WriteString(v)                    End If                    xw.WriteEndElement()                Next                xw.WriteEndElement()            Next            xw.WriteEndElement()        End Using    End SubEnd Class