// ===========================================================================
// ©2013-2026 WebSupergoo. All rights reserved.
//
// This source code is for use exclusively with the ABCpdf product with
// which it is distributed, under the terms of the license for that
// product. Details can be found at
//
// http://www.websupergoo.com/
//
// This copyright notice must not be deleted and must be reproduced alongside
// any sections of code extracted from this module.
// ===========================================================================
using System;
using System.Drawing;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Xml;
using WebSupergoo.ABCpdf14;
using WebSupergoo.ABCpdf14.Objects;
using WebSupergoo.ABCpdf14.Operations;
using WebSupergoo.ABCpdf14.Atoms;
using OptionalContent;
namespace OCGLayers
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form {
private Button annotateButton;
private Button removeButton;
private TextBox textBox2;
private PictureBox previewPictureBox;
private CheckedListBox layersCheckedListBox;
private ComboBox pageCombo;
private Button openButton;
private Button saveButton;
private Button createButton1;
private Button createButton2;
private Button createButton3;
private TextBox textBox1;
private TextBox textBox3;
private Button openExternallyButton;
private Button purgeButton;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.annotateButton = new System.Windows.Forms.Button();
this.removeButton = new System.Windows.Forms.Button();
this.textBox2 = new System.Windows.Forms.TextBox();
this.previewPictureBox = new System.Windows.Forms.PictureBox();
this.layersCheckedListBox = new System.Windows.Forms.CheckedListBox();
this.pageCombo = new System.Windows.Forms.ComboBox();
this.openButton = new System.Windows.Forms.Button();
this.saveButton = new System.Windows.Forms.Button();
this.createButton1 = new System.Windows.Forms.Button();
this.createButton2 = new System.Windows.Forms.Button();
this.createButton3 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.openExternallyButton = new System.Windows.Forms.Button();
this.purgeButton = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.previewPictureBox)).BeginInit();
this.SuspendLayout();
//
// annotateButton
//
this.annotateButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.annotateButton.Location = new System.Drawing.Point(666, 505);
this.annotateButton.Name = "annotateButton";
this.annotateButton.Size = new System.Drawing.Size(186, 26);
this.annotateButton.TabIndex = 2;
this.annotateButton.Text = "Annotate Layers";
this.annotateButton.Click += new System.EventHandler(this.annotateButton_Click);
//
// removeButton
//
this.removeButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.removeButton.Location = new System.Drawing.Point(666, 538);
this.removeButton.Name = "removeButton";
this.removeButton.Size = new System.Drawing.Size(186, 76);
this.removeButton.TabIndex = 3;
this.removeButton.Text = "Delete Content of Invisible Layers and Remove From Page";
this.removeButton.Click += new System.EventHandler(this.removeButton_Click);
//
// textBox2
//
this.textBox2.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.textBox2.Location = new System.Drawing.Point(19, 770);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(623, 22);
this.textBox2.TabIndex = 5;
//
// previewPictureBox
//
this.previewPictureBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.previewPictureBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.previewPictureBox.Location = new System.Drawing.Point(19, 21);
this.previewPictureBox.Name = "previewPictureBox";
this.previewPictureBox.Size = new System.Drawing.Size(623, 730);
this.previewPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
this.previewPictureBox.TabIndex = 6;
this.previewPictureBox.TabStop = false;
//
// layersCheckedListBox
//
this.layersCheckedListBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.layersCheckedListBox.FormattingEnabled = true;
this.layersCheckedListBox.Location = new System.Drawing.Point(666, 57);
this.layersCheckedListBox.Name = "layersCheckedListBox";
this.layersCheckedListBox.Size = new System.Drawing.Size(186, 106);
this.layersCheckedListBox.TabIndex = 7;
this.layersCheckedListBox.ItemCheck += new System.Windows.Forms.ItemCheckEventHandler(this.layersCheckedListBox_ItemCheck);
//
// pageCombo
//
this.pageCombo.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.pageCombo.FormattingEnabled = true;
this.pageCombo.Location = new System.Drawing.Point(666, 21);
this.pageCombo.Name = "pageCombo";
this.pageCombo.Size = new System.Drawing.Size(186, 24);
this.pageCombo.TabIndex = 8;
this.pageCombo.SelectedIndexChanged += new System.EventHandler(this.pageCombo_SelectedIndexChanged);
//
// openButton
//
this.openButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
this.openButton.Location = new System.Drawing.Point(19, 804);
this.openButton.Name = "openButton";
this.openButton.Size = new System.Drawing.Size(124, 26);
this.openButton.TabIndex = 9;
this.openButton.Text = "Load PDF...";
this.openButton.Click += new System.EventHandler(this.openButton_Click);
//
// saveButton
//
this.saveButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
this.saveButton.Location = new System.Drawing.Point(270, 804);
this.saveButton.Name = "saveButton";
this.saveButton.Size = new System.Drawing.Size(124, 26);
this.saveButton.TabIndex = 10;
this.saveButton.Text = "Save PDF...";
this.saveButton.Click += new System.EventHandler(this.saveButton_Click);
//
// createButton1
//
this.createButton1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.createButton1.Location = new System.Drawing.Point(666, 291);
this.createButton1.Name = "createButton1";
this.createButton1.Size = new System.Drawing.Size(186, 27);
this.createButton1.TabIndex = 11;
this.createButton1.Text = "Create Simple Layers";
this.createButton1.Click += new System.EventHandler(this.createButton1_Click);
//
// createButton2
//
this.createButton2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.createButton2.Location = new System.Drawing.Point(666, 323);
this.createButton2.Name = "createButton2";
this.createButton2.Size = new System.Drawing.Size(186, 27);
this.createButton2.TabIndex = 12;
this.createButton2.Text = "Create Nested Layers";
this.createButton2.Click += new System.EventHandler(this.createButton2_Click);
//
// createButton3
//
this.createButton3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.createButton3.Location = new System.Drawing.Point(666, 354);
this.createButton3.Name = "createButton3";
this.createButton3.Size = new System.Drawing.Size(186, 27);
this.createButton3.TabIndex = 13;
this.createButton3.Text = "Create Membership Layers";
this.createButton3.Click += new System.EventHandler(this.createButton3_Click);
//
// textBox1
//
this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.None;
this.textBox1.Enabled = false;
this.textBox1.Location = new System.Drawing.Point(666, 204);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(186, 82);
this.textBox1.TabIndex = 14;
this.textBox1.Text = "The buttons below allow you to create different types of layer structure. Details" +
" of the specific structures created can be found in the source code.";
//
// textBox3
//
this.textBox3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.None;
this.textBox3.Enabled = false;
this.textBox3.Location = new System.Drawing.Point(666, 406);
this.textBox3.Multiline = true;
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(186, 92);
this.textBox3.TabIndex = 15;
this.textBox3.Text = "Use the buttons below to annotate items on the page with their layer details and " +
"also to delete and redact items on specific layers.";
//
// openExternallyButton
//
this.openExternallyButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.openExternallyButton.Location = new System.Drawing.Point(666, 678);
this.openExternallyButton.Name = "openExternallyButton";
this.openExternallyButton.Size = new System.Drawing.Size(186, 27);
this.openExternallyButton.TabIndex = 16;
this.openExternallyButton.Text = "Open in Acrobat";
this.openExternallyButton.UseVisualStyleBackColor = true;
this.openExternallyButton.Click += new System.EventHandler(this.openExternallyButton_Click);
//
// purgeButton
//
this.purgeButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.purgeButton.Location = new System.Drawing.Point(666, 621);
this.purgeButton.Name = "purgeButton";
this.purgeButton.Size = new System.Drawing.Size(186, 51);
this.purgeButton.TabIndex = 17;
this.purgeButton.Text = "Remove Unused Layers From Document";
this.purgeButton.Click += new System.EventHandler(this.purgeButton_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
this.ClientSize = new System.Drawing.Size(873, 856);
this.Controls.Add(this.purgeButton);
this.Controls.Add(this.openExternallyButton);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.createButton3);
this.Controls.Add(this.createButton2);
this.Controls.Add(this.createButton1);
this.Controls.Add(this.saveButton);
this.Controls.Add(this.openButton);
this.Controls.Add(this.pageCombo);
this.Controls.Add(this.layersCheckedListBox);
this.Controls.Add(this.previewPictureBox);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.removeButton);
this.Controls.Add(this.annotateButton);
this.Name = "Form1";
this.Text = "Optional Content Demo";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.previewPictureBox)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private Doc _doc;
List<Group> _groups;
private void Form1_Load(object sender, EventArgs e) {
string thePath = Directory.GetParent(Directory.GetCurrentDirectory()).Parent.FullName;
string[] files = Directory.GetFiles(thePath, "*.pdf");
foreach (string file in files) {
if (!file.Contains("_out")) {
try {
LoadPDF(file);
break;
}
catch {
}
}
}
}
private void annotateButton_Click(object sender, EventArgs e) {
if (_doc == null)
return;
Properties props = Properties.FromDoc(_doc, false);
if (props == null)
return;
foreach (Page page in _doc.ObjectSoup.Catalog.Pages.GetPageArrayAll()) {
_doc.Page = page.ID;
Reader oc = Reader.FromPage(props, page);
if (true) {
TextOperation op = new TextOperation(_doc);
op.PageContents.AddPages(_doc.PageNumber);
string text = op.GetText();
if (text.Length > 0) {
IList<TextFragment> fragments = op.Select(0, text.Length);
_doc.FontSize = 12;
_doc.Width = 0.1;
foreach (TextFragment fragment in fragments) {
_doc.Rect.String = fragment.Rect.String;
List<OptionalContent.Layer> states = oc.GetLayersFromStreamAndPosition(fragment.StreamID, fragment.StreamOffset);
if (states.Count > 0)
_doc.AddText(MakeDescription(states));
_doc.FrameRect();
}
}
}
if (true) {
// The ImageOperation only picks up images and not Form XObjects.
// Until we have an update which allows us to see Form XObject location
// too, we cannot annotate Form XObjects which are marked as optional.
ImageOperation op = new ImageOperation(_doc);
op.PageContents.AddPages(_doc.PageNumber);
foreach (ImageProperties image in op.GetImageProperties()) {
List<OptionalContent.Layer> states = oc.GetLayersFromObject(image.PixMap);
if (states.Count > 0) {
string txt = MakeDescription(states);
foreach (ImageRendition rendition in image.Renditions) {
rendition.Focus();
_doc.AddText(txt);
_doc.FrameRect();
}
}
}
}
if (true) {
foreach (Annotation annot in page.GetAnnotations()) {
List<OptionalContent.Layer> states = oc.GetLayersFromObject(annot);
if (states.Count > 0) {
annot.Focus();
_doc.AddText(MakeDescription(states));
_doc.FrameRect();
}
}
}
}
UpdatePreview();
}
private static string MakeDescription(List<OptionalContent.Layer> states) {
string[] names = new string[states.Count];
for (int i = 0; i < names.Length; i++)
names[i] = states[i].Group != null ? states[i].Group.EntryName.Text : "Membership Dictionary";
string txt = string.Join(" ", names);
return txt;
}
private void removeButton_Click(object sender, EventArgs e) {
if (_doc == null)
return;
try {
Cursor.Current = Cursors.WaitCursor;
Properties props = Properties.FromDoc(_doc, false);
if (props == null)
return;
Page page = (Page)_doc.ObjectSoup[_doc.Page];
Reader reader = Reader.FromPage(props, page);
List<OptionalContent.Layer> layers = reader.GetLayers();
foreach (OptionalContent.Layer layer in layers) {
if (layer.Visible == false) {
if (reader == null)
reader = Reader.FromPage(props, page);
Reader.Redact(ref reader, layer);
}
}
UpdateLayers();
UpdatePreview();
}
finally {
Cursor.Current = Cursors.Default;
}
}
private void purgeButton_Click(object sender, EventArgs e) {
if (_doc == null)
return;
try {
Cursor.Current = Cursors.WaitCursor;
Properties props = Properties.FromDoc(_doc, false);
if (props == null)
return;
HashSet<Group> unused = props.RemoveUnusedGroups();
if (unused.Count > 0) {
UpdateLayers();
UpdatePreview();
}
}
finally {
Cursor.Current = Cursors.Default;
}
}
private List<TemporaryFile> _tempFiles;
private void openExternallyButton_Click(object sender, EventArgs e) {
if (_tempFiles == null)
_tempFiles = new List<TemporaryFile>();
TemporaryFile temp = new TemporaryFile(".pdf");
// when we save we try to keep the object ids constant
_doc.SaveOptions.Linearize = false;
_doc.SaveOptions.Remap = false;
_doc.Save(temp.Path);
_tempFiles.Add(temp);
System.Diagnostics.Process.Start(temp.Path);
}
private void createButton1_Click(object sender, EventArgs e) {
Doc doc = new Doc();
Properties props = Properties.FromDoc(doc, true);
List<Group> groups = new List<Group>();
for (int i = 1; i < 4; i++)
groups.Add(props.AddGroup("Layer " + i.ToString(), null));
doc.FontSize = 36;
doc.Rect.Inset(20, 20);
for (int i = 0; i < 1; i++) {
doc.Page = doc.AddPage();
Page page = (Page)doc.ObjectSoup[doc.Page];
Writer writer = new Writer(props, page);
foreach (Group group in groups) {
OptionalContent.Layer layer = writer.AddGroup(group);
writer.StartLayer(layer);
doc.AddText(group.EntryName.Text + "\r\n");
writer.EndLayer();
doc.AddText("Always Visible\r\n");
writer.StartLayer(layer);
doc.AddText(group.EntryName.Text + "\r\n\r\n");
writer.EndLayer();
}
doc.Flatten();
}
LoadPDF(doc);
}
private void createButton2_Click(object sender, EventArgs e) {
Doc doc = new Doc();
Properties props = Properties.FromDoc(doc, true);
Group parent = null;
List<Group> groups = new List<Group>();
// The Optional Content Group parent determines the nesting in the UI.
// The presentation of the nesting is separate from the actual nesting
// of visibility. In general you will want to ensure the two correspond
// as in the code here.
for (int i = 1; i <= 10; i++) {
Group group = props.AddGroup("Layer " + i.ToString(), parent);
groups.Add(group);
parent = i == 5 ? null : group;
}
doc.Page = doc.AddPage();
doc.FontSize = 36;
doc.Rect.Inset(20, 20);
Page page = (Page)doc.ObjectSoup[doc.Page];
Writer writer = new Writer(props, page);
// This determines the nesting of actual visibility. Here we ensure that this
// corresponds to the hierarchy specified in the UI so that it works in an
// obvious way.
for (int i = 0; i < groups.Count; i++) {
Group group = groups[i];
OptionalContent.Layer layer = writer.AddGroup(group);
if (i == 5)
while (writer.Depth > 0)
writer.EndLayer();
writer.StartLayer(layer);
doc.AddText(group.EntryName.Text + "\r\n");
}
while (writer.Depth > 0)
writer.EndLayer();
doc.Flatten();
LoadPDF(doc);
}
private void createButton3_Click(object sender, EventArgs e) {
Doc doc = new Doc();
Properties props = Properties.FromDoc(doc, true);
List<Group> groups = new List<Group>();
for (int i = 1; i < 4; i++)
groups.Add(props.AddGroup("Layer " + i.ToString(), null));
// membership policies are simple to use but limited in scope
MembershipGroup alloff = props.AddMembershipGroup();
alloff.Policy = MembershipGroup.PolicyEnum.AllOff;
alloff.PolicyGroups = groups;
// membership visibility expressions are more complex but more powerful
MembershipGroup mgve = props.AddMembershipGroup();
ArrayAtom ve = mgve.MakeVisibilityExpression(MembershipGroup.LogicEnum.Or, groups);
mgve.EntryVE = mgve.MakeVisibilityExpression(MembershipGroup.LogicEnum.Not, new ArrayAtom[] { ve });
doc.FontSize = 36;
doc.Rect.Inset(20, 20);
for (int i = 0; i < 3; i++) {
doc.Page = doc.AddPage();
Page page = (Page)doc.ObjectSoup[doc.Page];
Writer writer = new Writer(props, page);
OptionalContent.Layer layer1 = writer.AddGroup(alloff);
doc.AddText("The next line uses a Policy so that it is only visible if all layers are turned off...\r\n");
writer.StartLayer(layer1);
doc.AddText("I am normally invisible\r\n\r\n");
writer.EndLayer();
OptionalContent.Layer layer2 = writer.AddGroup(mgve);
doc.AddText("The next line uses a Visibility Expression so that it is only visible if all layers are turned off...\r\n");
writer.StartLayer(layer2);
doc.AddText("I am normally invisible\r\n");
writer.EndLayer();
doc.Flatten();
}
LoadPDF(doc);
}
private void pageCombo_SelectedIndexChanged(object sender, EventArgs e) {
_doc.PageNumber = pageCombo.SelectedIndex + 1;
UpdateLayers();
UpdatePreview();
}
private void LoadPDF(string file) {
Doc doc = new Doc();
doc.Read(file);
LoadPDF(doc);
textBox2.Text = file;
}
private class ComboBoxItem {
public string Name;
public int Value;
public ComboBoxItem(string name, int value) {
Name = name; Value = value;
}
public override string ToString() {
return Name;
}
}
private void LoadPDF(Doc doc) {
_doc = doc;
_groups = null;
int n = _doc.PageCount;
pageCombo.Items.Clear();
for (int i = 1; i <= n; i++)
pageCombo.Items.Add(new ComboBoxItem("Page " + i.ToString() + " of " + n.ToString(), i));
pageCombo.SelectedIndex = 0;
UpdateLayers();
UpdatePreview();
}
private void UpdateLayers() {
_groups = null;
layersCheckedListBox.Items.Clear();
if (_doc == null)
return;
Properties props = Properties.FromDoc(_doc, false);
if (props == null)
return;
Configuration config = props.GetDefault();
if (config == null)
return;
Page page = (Page)_doc.ObjectSoup[_doc.Page];
List<Group> groups = props.GetGroups(page);
List<int> indents = new List<int>();
props.SortGroupsForPresentation(groups, indents);
Doc doc = _doc;
try {
_doc = null;
int n = groups.Count;
for (int i = 0; i < n; i++) {
Group group = groups[i];
string indent = new string(' ', indents[i] * 3);
layersCheckedListBox.Items.Add(indent + group.EntryName.Text, group.Visible);
}
}
finally {
_doc = doc;
_groups = groups;
}
}
private void UpdatePreview() {
if (_doc == null) {
previewPictureBox.Image = null;
return;
}
_doc.Rect.String = _doc.MediaBox.String;
double scale = previewPictureBox.Width / _doc.Rect.Width;
_doc.Rendering.DotsPerInch = Math.Max(scale, 1.0) * 72.0;
previewPictureBox.Image = _doc.Rendering.GetBitmap();
//if (_doc.Rendering.Log.Length > 0)
// MessageBox.Show("Render warning: " + _doc.Rendering.Log);
}
private void layersCheckedListBox_ItemCheck(object sender, ItemCheckEventArgs e) {
if ((_doc == null) || (_groups == null) || (e.NewValue == CheckState.Indeterminate))
return;
_groups[e.Index].Visible = e.NewValue == CheckState.Checked;
UpdatePreview();
}
private void openButton_Click(object sender, EventArgs e) {
OpenFileDialog dialog = new OpenFileDialog();
dialog.Filter = "PDF Files (.pdf)|*.pdf|AI Files (*.ai)|*.ai";
dialog.FilterIndex = 1;
if (dialog.ShowDialog() == DialogResult.OK)
LoadPDF(dialog.FileName);
}
private void saveButton_Click(object sender, EventArgs e) {
if (_doc == null)
_doc = new Doc();
SaveFileDialog dialog = new SaveFileDialog();
dialog.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
dialog.FilterIndex = 1;
dialog.FileName = "Untitled.pdf";
if (dialog.ShowDialog() == DialogResult.OK)
_doc.Save(dialog.FileName);
}
}
internal sealed class TemporaryFile : IDisposable {
private string mPath;
private TemporaryFile() { }
public TemporaryFile(string ext) {
mPath = GetTempFilePath(ext);
}
~TemporaryFile() {
Dispose(false);
}
public void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
// sealed class cannot introduce virtual method
// warned if sealed class introduces protected member
private /*virtual*/ void Dispose(bool disposing) {
try {
DeleteFile();
}
catch {
}
}
public string Path { get { return mPath; } }
public void DeleteFile() {
if (mPath != null) {
if (File.Exists(mPath))
File.Delete(mPath);
mPath = null;
}
}
private static string GetTempFilePath(string ext) {
if (string.IsNullOrWhiteSpace(ext))
ext = ".dat";
else if (!ext.StartsWith("."))
ext = "." + ext;
return System.IO.Path.Combine(System.IO.Path.GetTempPath(), Guid.NewGuid().ToString() + ext);
}
}
}
