Regular Expression Filename Find and Replace

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;

namespace RegexFilenames
{
    public partial class frmMain : Form
    {
        private bool dirty = false;
        private string projectPath = "";
        private string project = "New.rxproj";
        private bool projectNameSet = false;

        public frmMain()
        {
            InitializeComponent();
        }

        private void btnTest_Click(object sender, EventArgs e)
        {
            // create hte replace form
            frmReplace test = new frmReplace();

            // set options on the form
            test.Find = txtFind.Text;
            test.Replace = txtReplace.Text;
            test.TestOnly = true;
            test.SubDirectories = chkSubDirectories.Checked;
            test.Directory = txtDirectory.Text;

            // set the regex options
            if (chkCompiled.Checked)
                test.Options |= System.Text.RegularExpressions.RegexOptions.Compiled;

            if (chkIgnoreCase.Checked)
                test.Options |= System.Text.RegularExpressions.RegexOptions.IgnoreCase;

            if (chkIgnoreWS.Checked)
                test.Options |= System.Text.RegularExpressions.RegexOptions.IgnorePatternWhitespace;

            // show the form
            test.Show();

            // do a trial run through the replacements
            test.ReplaceFiles();
        }

        private void btnReplace_Click(object sender, EventArgs e)
        {
            // replace the files
            if (MessageBox.Show("Are you sure you want to run this regex?\r\nThis cannot be undone!", "Are you sure?",
                MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                // create the replace form
                frmReplace replace = new frmReplace();

                // set options on the form
                replace.Find = txtFind.Text;
                replace.Replace = txtReplace.Text;
                replace.TestOnly = false;
                replace.SubDirectories = chkSubDirectories.Checked;
                replace.Directory = txtDirectory.Text;

                // set the regex options
                if (chkCompiled.Checked)
                    replace.Options |= System.Text.RegularExpressions.RegexOptions.Compiled;

                if (chkIgnoreCase.Checked)
                    replace.Options |= System.Text.RegularExpressions.RegexOptions.IgnoreCase;

                if (chkIgnoreWS.Checked)
                    replace.Options |= System.Text.RegularExpressions.RegexOptions.IgnorePatternWhitespace;

                // show the form that does the replacements 
                replace.Show();

                // replace the files
                replace.ReplaceFiles();
            }
        }

        private void btnFindDirectory_Click(object sender, EventArgs e)
        {
            // popup a box to find the directory. Using a file open dialog because the
            // directory find dialog is screwed up on XP SP2
            if (dlgOpen.ShowDialog() == DialogResult.OK)
            {
                txtDirectory.Text = Path.GetDirectoryName(dlgOpen.FileName);
            }
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // exit the program.
            this.Close();

            Application.Exit();
        }

        private void newProjectToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // clear out all the text fields
            txtDirectory.Text = "";
            txtFind.Text = "";
            txtReplace.Text = "";

            // reset the checkboxes
            chkCompiled.Checked = true;
            chkIgnoreCase.Checked = true;
            chkIgnoreWS.Checked = true;
            chkSubDirectories.Checked = false;

            // update the project details
            dirty = false;
            projectNameSet = false;
            projectPath = "";
            project = "New.rxproj";
            this.Text = "Rexeg Find and Replace File Names - " + project;
        }

        private void openProjectToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // check if the current project needs to be saved before we continue
            if (dirty)
            {
                // yes, give them the option to save
                if (MessageBox.Show("Do you wish to save your current project first?", "Save first?",
                    MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    // run the save method
                    saveProjectToolStripMenuItem_Click(sender, e);
                }
            }

            // find a project to open
            if (dlgOpenProject.ShowDialog() == DialogResult.OK)
            {
                // load the xml file in
                XmlDocument doc = new XmlDocument();
                doc.Load(dlgOpenProject.FileName);

                // check to see if its valid
                if (doc.DocumentElement.Name != "rxproject")
                {
                    // not valid, we can't continue
                    MessageBox.Show("Not a valid project file", "Invalid Project", 
                        MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                    return;
                }

                // load in the text boxes and their data
                txtDirectory.Text = doc.SelectSingleNode("/rxproject/directory").InnerText;
                txtFind.Text = doc.SelectSingleNode("/rxproject/find").InnerText;
                txtReplace.Text = doc.SelectSingleNode("/rxproject/replace").InnerText;

                // load in the check boxes and their states
                chkCompiled.Checked = Boolean.Parse(doc.SelectSingleNode("/rxproject/compiled").InnerText);
                chkIgnoreCase.Checked = Boolean.Parse(doc.SelectSingleNode("/rxproject/ignorecase").InnerText);
                chkIgnoreWS.Checked = Boolean.Parse(doc.SelectSingleNode("/rxproject/ignorews").InnerText);
                chkSubDirectories.Checked = Boolean.Parse(doc.SelectSingleNode("/rxproject/subdirectories").InnerText);

                // set project details, and update the window title
                dirty = false;
                project = Path.GetFileName(dlgOpenProject.FileName);
                projectPath = dlgOpenProject.FileName;
                projectNameSet = true;
                this.Text = "Rexeg Find and Replace File Names - " + project;
            }
        }

        private void saveProjectToolStripMenuItem_Click(object sender, EventArgs e)
        {
            // check if we have a project path already set
            if (!projectNameSet)
            {
                // no.. find somewhere to save tihs
                if (dlgSaveProject.ShowDialog() == DialogResult.OK)
                {
                    projectPath = dlgSaveProject.FileName;
                    project = Path.GetFileName(dlgSaveProject.FileName);
                    projectNameSet = true;
                }
                else
                {
                    return;
                }
            }

            // create a document to contain the data in
            XmlDocument doc = new XmlDocument();
            
            // root node
            XmlNode node = doc.CreateNode(XmlNodeType.Element, "rxproject", "");
            doc.AppendChild(node);

            // text fields
            node = doc.CreateNode(XmlNodeType.Element, "directory", "");
            node.InnerText = txtDirectory.Text;
            doc.DocumentElement.AppendChild(node);

            node = doc.CreateNode(XmlNodeType.Element, "find", "");
            node.InnerText = txtFind.Text;
            doc.DocumentElement.AppendChild(node);

            node = doc.CreateNode(XmlNodeType.Element, "replace", "");
            node.InnerText = txtReplace.Text;
            doc.DocumentElement.AppendChild(node);

            // check boxes
            node = doc.CreateNode(XmlNodeType.Element, "compiled", "");
            node.InnerText = chkCompiled.Checked.ToString();
            doc.DocumentElement.AppendChild(node);

            node = doc.CreateNode(XmlNodeType.Element, "ignorecase", "");
            node.InnerText = chkIgnoreCase.Checked.ToString();
            doc.DocumentElement.AppendChild(node);

            node = doc.CreateNode(XmlNodeType.Element, "ignorews", "");
            node.InnerText = chkIgnoreWS.Checked.ToString();
            doc.DocumentElement.AppendChild(node);

            node = doc.CreateNode(XmlNodeType.Element, "subdirectories", "");
            node.InnerText = chkSubDirectories.Checked.ToString();
            doc.DocumentElement.AppendChild(node);

            // save it away
            doc.Save(projectPath);

            // no longer dirty - update window title
            dirty = false;
            //project = Path.GetFileName(projectPath);
            this.Text = "Rexeg Find and Replace File Names - " + project;
        }

        private void evntTextChanged(object sender, EventArgs e)
        {
            // a field on the form was changed. make it dirty.
            dirty = true;

            this.Text = "Rexeg Find and Replace File Names - " + project + "*";
        }

        private void frmMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            // check if the current project needs to be saved before we continue
            if (dirty)
            {
                // yes, give them the option to save
                if (MessageBox.Show("Do you wish to save your current project first?", "Save first?",
                    MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    // run the save method
                    saveProjectToolStripMenuItem_Click(sender, e);
                }
            }
        }

        private void PaintPanel(object sender, PaintEventArgs e)
        {
            // this wouldnt work if the form was able to be resized. lucky it cant be :)
            using (Pen p = new Pen(SystemBrushes.ControlDark))
            {
                Control c = (Control)sender;
                e.Graphics.DrawRectangle(p, new Rectangle(1, 1, c.Width - 2, c.Height - 2));
            }
        }
    }
}