// // This code is part of Document Solutions for PDF demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using System.Text; using GrapeCity.Documents.Pdf; using GrapeCity.Documents.Text; using GrapeCity.Documents.Pdf.AcroForms; namespace DsPdfWeb.Demos { // This sample loads the form created by the FormFields sample, // loops through all form fields found in that file, // and modifies the values of input fields. // The log of what was done (showing old and new values) is added to the form page. public class FillForm { public int CreatePDF(Stream stream) { // The original file stream must be kept open while working with the loaded PDF, see LoadPDF for details: using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "FormFields.pdf")); var doc = new GcPdfDocument(); doc.Load(fs); var page = doc.Pages.Last; var sb = new StringBuilder(); sb.AppendLine("Log of updates made by the FillForm sample:\r\n"); foreach (Field fld in doc.AcroForm.Fields) { if (fld is CombTextField ctfld) { sb.Append($"CombTextField.Value was '{ctfld.Value}', "); ctfld.Value = "Comb text"; sb.AppendLine($"now '{ctfld.Value}'."); } else if (fld is TextField tfld) { sb.Append($"TextField.Value was '{tfld.Value}', "); tfld.Value = $"Text updated on {Common.Util.TimeNow():u}"; sb.AppendLine($"now '{tfld.Value}'."); } else if (fld is CheckBoxField cfld) { sb.Append($"CheckBoxField.Value was '{cfld.Checked}', "); cfld.Checked = !cfld.Checked; sb.AppendLine($"now '{cfld.Checked}'."); } else if (fld is RadioButtonField rbfld) { sb.Append($"RadioButtonField.Value was '{rbfld.Value}', "); rbfld.Value = rbfld.Widgets.Count - 1; sb.AppendLine($"now '{rbfld.Value}'."); } else if (fld is ComboBoxField cmbfld) { sb.Append($"ComboBoxField selection was '{cmbfld.Items[cmbfld.SelectedIndex].Text}', "); cmbfld.SelectedIndex = cmbfld.Items.Count - 1; sb.AppendLine($"now '{cmbfld.Items[cmbfld.SelectedIndex].Text}'."); } else if (fld is ListBoxField lbfld) { sb.Append($"ListBoxField selection was '{lbfld.Items[lbfld.SelectedIndex].Text}', "); lbfld.SelectedIndex = lbfld.Items.Count - 1; sb.AppendLine($"now '{lbfld.Items[lbfld.SelectedIndex].Text}'."); } else if (fld is SignatureField sfld) { sb.AppendLine("SignatureField found."); } else if (fld is PushButtonField btnfld) { sb.AppendLine($"PushButtonField '{btnfld.Widget.ButtonAppearance.Caption}' found."); } else { sb.AppendLine($"Field '{fld}' found/"); } } // Add a log of what we did at the bottom of the page: var tl = new TextLayout(72) { MaxWidth = page.Size.Width, MaxHeight = page.Size.Height, MarginLeft = 80, MarginRight = 80, MarginBottom = 80, ParagraphAlignment = ParagraphAlignment.Far }; tl.Append(sb.ToString(), new TextFormat() { Font = StandardFonts.Times, FontSize = 12 }); tl.PerformLayout(true); var rc = tl.ContentRectangle; rc.Inflate(8, 8); page.Graphics.FillRectangle(rc, Color.LightYellow); page.Graphics.DrawRectangle(rc, Color.Orange); page.Graphics.DrawTextLayout(tl, PointF.Empty); // Done: doc.Save(stream); return doc.Pages.Count; } } }