FormDataSubmit.cs
- //
- // This code is part of Document Solutions for PDF demos.
- // Copyright (c) MESCIUS inc. All rights reserved.
- //
- using System.Drawing;
- using System.IO;
- using System.Linq;
- using System.Xml;
- using System.Text;
- 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;
- }
- }
- }
-