//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.Drawing;using System.IO;using System.Collections.Generic;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.AcroForms;using GrapeCity.Documents.Pdf.Actions;using GrapeCity.Documents.Pdf.Annotations;using GrapeCity.Documents.Text;
namespace DsPdfWeb.Demos{    // This sample creates an AcroForm PDF that can be submitted to the server.    // The server then uses the (new in DsPdf v3) GcPdfDocument.ImportFormDataFromCollection()    // method to import the submitted data into a PDF that contains a similarly structured    // PDF form, and sends the form filled with user provided data back to the client.    //    // Note that the produced PDF with filled form fields    // is shown in the client browser's default PDF viewer.    //    // This sample is similar to the now obsolete FormSubmitXml sample,    // but the server side is much simpler as it uses the new ImportFormDataFromCollection()    // method that accepts a data structure very similar to how data is sent from the client form,    // so almost no code is needed to manipulate that data.    // See also the FormSubmit sample.    public class FormDataSubmit    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            var page = doc.NewPage();
            var rc = Common.Util.AddNote(                "Fill the fields in the form and click 'Submit' to send it back to the server. " +                "The sample server will use the GcPdfDocument.ImportFormDataFromCollection() method " +                "to import the submitted data into a different but compatible PDF form, " +                "and the filled form will be sent back to your browser. " +                "Note that the filled form is opened in the browser's default PDF viewer, " +                "and does not have the 'Submit' and 'Reset' buttons.",                page);
            var g = page.Graphics;            var tf = new TextFormat() { Font = StandardFonts.Times, FontSize = 14 };            var ip = new PointF(72, rc.Bottom + 36);            float fldOffset = 72 * 2 + 46;            float fldHeight = tf.FontSize * 1.2f;            float dY = 32;
            // Text field:            g.DrawString("First name:", tf, ip);            var fldFirstName = new TextField() { 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);            var fldLastName = new TextField() { 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);            var fldCheckbox = new CheckBoxField() { 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);            var fldAdditionalInfo = new TextField() { 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:            var 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/HandleFormDataSubmit");            doc.AcroForm.Fields.Add(btnSubmit);
            // Reset form button:            var 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;        }
        //        // 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.ImportFormDataFromCollection() method.        //        // This method is called by the samples controller when the form prepared by this sample        // is submitted by the user. The controller method converts the IFormCollection that it        // receives to an array or key value pairs, where keys are field names and values are        // lists of string values, then calls this method to import the values into the        // compatible ImportFormXML.pdf PDF form. That form is then sent back to the client.        //        // The controller code that calls this method looks like this:        //        // public IActionResult HandleFormDataSubmit(IFormCollection fields)        // {        //   var values = fields.ToList();        //   var fieldValues = values.Select(kvp_ => new KeyValuePair<string, IList<string>>(kvp_.Key, kvp_.Value.ToArray())).ToArray();        //   var ms = Samples.FormDataSubmit.ImportFormData(fieldValues);        //   var result = new FileStreamResult(ms, "application/pdf");        //   return result;        // }        public static Stream ImportFormData(KeyValuePair<string, IList<string>>[] fieldValues)        {            var pdf = new GcPdfDocument();            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "ImportFormFromCollection.pdf"));            // Load compatible empty form:            pdf.Load(fs);            // Import submitted data:            pdf.ImportFormDataFromCollection(fieldValues);            // Done:            var outMs = new MemoryStream();            pdf.Save(outMs);            outMs.Seek(0, SeekOrigin.Begin);            return outMs;        }    }}