rtf editor main form

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

namespace Rich_Text_Editor
{
    public partial class frmRichTextEditor : Form
    {
        public frmRichTextEditor()
        {
            InitializeComponent();
        }

        bool textSaved = true;// creates a boolean variable and
        string fileName = "";// creates filename variable as a string
        string fileTitle;// creates the fileTitle variable as a string
        DialogResult result;// declares result as a DialogResult

        private void msNew_Click(object sender, EventArgs e)//checks if the user wants to save before a new document is created
        {
            dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the save file dialog filter
            if (textSaved == false)// if the text has not been saved
            {
                result = MessageBox.Show("Do you wish to save your changes?", "Text Changed Since Last Save", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);// sets the result variable into as the answer chosen by the user
                if (result == DialogResult.Yes)// if the user clicked yes
                {
                    msSaveFile_Click(sender, e);// simulate a click on the save file button, calling the save function
                }
                else if (result == DialogResult.No)// if the user clicked no
                {
                    textSaved = false;// set the textSaved value to no, indicating the text needs to be saved
                    rtbContent.Clear();// clear the rich text box
                    Text = "RTF Editor: untitled";// set the title of the program to show the document is a new document
                }
            }
        }
        private void msOpenFile_Click(object sender, EventArgs e)// asks the user if they want to save their document and opens a new file
        {
            if (textSaved == false)// if the text has not been saved
            {
                msSaveFile_Click(sender, e);// simulate a click on the save file button, calling the save function
            }
            dlgOpen.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// set the open dialog filter
            if (dlgOpen.ShowDialog() != DialogResult.Cancel)// if the dialog cancel button was not clicked
            {
                fileName = dlgOpen.FileName;//sets the fileName variable to the file name selected in the open file dialog
                if (fileName.EndsWith("txt"))// if the fileName variable ends with "txt"
                {
                    rtbContent.LoadFile(fileName, RichTextBoxStreamType.PlainText);// load content into the rich text box in plain text format
                }
                else if (fileName.EndsWith("rtf"))// else is the fileName variable ends in "rtf"
                {
                    rtbContent.LoadFile(fileName, RichTextBoxStreamType.RichText);// load content into the rich text box in rich text format
                }
                textSaved = true;// set the textSaved variable to true, indicating that the document was saved
                fileTitle = Path.GetFileName(fileName);// sets the file title variable to the file name found in the folder
                Text = "RTF Editor: " + fileTitle;// sets the title of the program to "RTF Editor: " + the fileTitle variable
            }
        }
        private void msSaveFile_Click(object sender, EventArgs e)// saves the file
        {
            dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the filter for the save file dialog
            if (textSaved == false)// if the document has not been saved
            {
                if (fileName != "")// if the file name is not equal to nothing
                {
                    if (fileName.EndsWith("txt"))//  if the file name ends with "txt"
                    {
                        rtbContent.SaveFile(fileName, RichTextBoxStreamType.PlainText);// save the content in the rtb as plain text format
                    }
                    else if (fileName.EndsWith("rtf"))// else if the file name ends with "rtf"
                    {
                        rtbContent.SaveFile(fileName, RichTextBoxStreamType.RichText);// save the content in the rtb as rich text format
                    }
                }
                else// else (if the filename does equal nothing)
                {
                    if (dlgSave.ShowDialog() != DialogResult.Cancel)// if the save file dialog was not cancelled
                    {
                        fileName = dlgSave.FileName;// set the file name variable to the filename specified in the save file dialog
                        if (fileName.EndsWith("txt"))// if the file name ends with "txt"
                        {
                            rtbContent.SaveFile(fileName, RichTextBoxStreamType.PlainText);// save the content in the rtb as plain text format
                        }
                        else if (fileName.EndsWith("rtf"))// if the file name ends with "txt"
                        {
                            rtbContent.SaveFile(fileName, RichTextBoxStreamType.RichText);// save the content in the rtb as rich text format
                        }
                    }
                }
                textSaved = true;// set the text saved variable to true, indicating the text file has been saved
                fileTitle = Path.GetFileName(fileName);// sets the file title variable to the file name found in the folder
                Text = "RTF Editor: " + fileTitle;// sets the title of the program to "RTF Editor: " + the fileTitle variable
            }
        }
        private void msSaveAs_Click(object sender, EventArgs e)// simulates a save as for the text in the document
        {
            dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the filter for the save file dialog
            if (dlgSave.ShowDialog() != DialogResult.Cancel)// the save file dialog was not cancelled
            {
                fileName = dlgSave.FileName;// set the file name variable to the name of the file determined by the save file dialog
                if (fileName.EndsWith("txt"))// if the file ends with "txt"
                {
                    rtbContent.SaveFile(fileName, RichTextBoxStreamType.PlainText);// saves the content of the rich text box in plain text
                }
                else if (fileName.EndsWith("rtf"))// if the file ends with "rtf"
                {
                    rtbContent.SaveFile(fileName, RichTextBoxStreamType.RichText);// saves the content of the rich text box inrich text
                }
                textSaved = true;// set the text saved variable to true, indicating the text file has been saved
                fileTitle = Path.GetFileName(fileName);// sets the file title variable to the file name found in the folder
                Text = "RTF Editor: " + fileTitle;// sets the title of the program to "RTF Editor: " + the fileTitle variable
            }
        }
        private void msExit_Click(object sender, EventArgs e)//closes the program
        {
            this.Close();// closes the program
        }
        private void msCut_Click(object sender, EventArgs e)//cuts selected text
        {
            if (rtbContent.SelectedText != "")// if the selected text is not equal to nothing
            {
                rtbContent.Cut();//cut the selection
            }
        }
        private void msCopy_Click(object sender, EventArgs e)//copies selected text
        {
            if (rtbContent.SelectedText != "")// if the selected text is not equal to nothing
            {
                rtbContent.Copy();// copies the selected text
            }
        }
        private void msPaste_Click(object sender, EventArgs e)// pastes text into the rich text box
        {
            if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)// if there is text data present in the clipboard
            {
                rtbContent.Paste();//paste the text into the tich text box
            }
        }
        private void msFont_Click(object sender, EventArgs e)// opens the font dialog box
        {
            if (dlgFont.ShowDialog() != DialogResult.Cancel)//if the font dialog box was not cancelled
            {
                rtbContent.Font = dlgFont.Font;// change the font to the font selected in the font dialog
            }
        }
        private void msColour_Click(object sender, EventArgs e)// opens the colour dialog box
        {
            if (dlgColour.ShowDialog() != DialogResult.Cancel)//if the colour dialog box was not cancelled
            {
                rtbContent.ForeColor = dlgColour.Color;// set the colour of the text to the colour selected in the colour dialog
            }
        }
        private void msFindText_Click(object sender, EventArgs e)// opens the find text form
        {
            frmFindReplace formFindReplace = new frmFindReplace();// declares a new instance of the find and replace form
            formFindReplace.Owner = this;// sets the owner of the find and replace form as the main form (form1)
            formFindReplace.Show();//shows the find and replace form
        }
        private void msAboutMe_Click(object sender, EventArgs e)// shows a message box detailing my student number
        {
            MessageBox.Show("10053670", "About Me", MessageBoxButtons.OK, MessageBoxIcon.Information);// opens a message box, sets the content to "10053670", the title to "about me", only allows an ok button and sets the message box icon to a question mark icon.
        }
        private void tsbNew_Click(object sender, EventArgs e)//creates a new document
        {
            dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the save dialog filter
            if (textSaved == false)// if the text has not been saved
            {
                result = MessageBox.Show("Do you wish to save your changes?", "Text Changed Since Last Save", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);// sets the result variable to the result of a message box dialog
                if (result == DialogResult.Yes)// if the result was yes
                {
                    msSaveFile_Click(sender, e);// simulate a click on the save file button, calling the save function
                }
                else if (result == DialogResult.No)// else if the result was no
                {
                    textSaved = false;// set the text saved variable to false, indicating the text has not been saved
                    rtbContent.Clear();// clear the rich text box content
                    Text = "RTF Editor: untitled";// set the title of the form to "untitled"
                }
            }
        }
        private void tsbOpen_Click(object sender, EventArgs e)// opens a document
        {
            if (textSaved == false)// if the text has not been saved
            {
                msSaveFile_Click(sender, e);// simulate a click on the save file button, calling the save function
            }
            dlgOpen.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// set the dialog open filter
            if (dlgOpen.ShowDialog() != DialogResult.Cancel)// if the open dialog was not cancelled
            {
                fileName = dlgOpen.FileName;// set the filename variable to the name of the file specified in the dialog
                if (fileName.EndsWith("txt"))// if the file name ends with "txt"
                {
                    rtbContent.LoadFile(fileName, RichTextBoxStreamType.PlainText);// load the file into the rich text box as a plain text file type
                }
                else if (fileName.EndsWith("rtf"))// else if the file name ends with "rtf"
                {
                    rtbContent.LoadFile(fileName, RichTextBoxStreamType.RichText);// load the file into the rich text box as a rich text file type
                }
                textSaved = true;// set the textSaved variable to true, indicating the text was saved
                fileTitle = Path.GetFileName(fileName);//sets the fileTitle  variable to the path of the selected file
                Text = "RTF Editor: " + fileTitle;// sets the title of the program to "RTF Editor: " + the fileTitle variable
            }
        }
        private void tsbSave_Click(object sender, EventArgs e)// saves a file
        {
            dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the save file dialog filter
            if (textSaved == false)// if the text has not been saved
            {
                if (fileName != "")// if the fileName variable is not nothing
                {
                    if (fileName.EndsWith("txt"))// if the filename variable ends with "txt"
                    {
                        rtbContent.SaveFile(fileName, RichTextBoxStreamType.PlainText);// save the file in a plain text format
                    }
                    else if (fileName.EndsWith("rtf"))//else if the file ends in "rtf"
                    {
                        rtbContent.SaveFile(fileName, RichTextBoxStreamType.RichText);// save the file in a rich text format
                    }
                }
                else// else (if the file name variable does equal something)
                {
                    if (dlgSave.ShowDialog() != DialogResult.Cancel)// if the save dialog was not cancelled
                    {
                        fileName = dlgSave.FileName;// sets the fileName variable as the file name specified by the dialog
                        if (fileName.EndsWith("txt"))// if the fileName ends with "txt"
                        {
                            rtbContent.SaveFile(fileName, RichTextBoxStreamType.PlainText);// save the file in plain text format
                        }
                        else if (fileName.EndsWith("rtf"))// else if the file name ends with "rtf"
                        {
                            rtbContent.SaveFile(fileName, RichTextBoxStreamType.RichText);// save the file in plain text format
                        }
                    }
                }
                textSaved = true;// set the textSaved variable to true, indicating the text was saved
                fileTitle = Path.GetFileName(fileName);//sets the fileTitle  variable to the path of the selected file
                Text = "RTF Editor: " + fileTitle;// sets the title of the program to "RTF Editor: " + the fileTitle variable
            }
        }
        private void tsbCut_Click(object sender, EventArgs e)//cuts selected text
        {
            if (rtbContent.SelectedText != "")// the selected text is not equal to nothing
            {
                rtbContent.Cut();// cut the selected text
            }
        }
        private void tsbCopy_Click(object sender, EventArgs e)// copies selected text
        {
            if (rtbContent.SelectedText != "")// if the selected text is not equal to nothing
            {
                rtbContent.Copy();// copy the selected text
            }
        }
        private void tsbPaste_Click(object sender, EventArgs e)// pastes text into the document
        {
            if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true)// if there is text data present in the clipboard
            {
                rtbContent.Paste();// pastes the clipboard data into the rich text box
            }
        }
        private void tsbAboutMe_Click(object sender, EventArgs e)// shows a message box detailing my student number
        {
            MessageBox.Show("10053670", "About Me", MessageBoxButtons.OK, MessageBoxIcon.Information);// opens a message box, sets the content to "10053670", the title to "about me", only allows an ok button and sets the message box icon to a question mark icon.
        }
        private void rtbContent_TextChanged(object sender, EventArgs e)// if the text value of the rich text box has been changed
        {
            textSaved = false;// set the text saved variable to false
        }
        private void frmRichTextEditor_FormClosing(object sender, FormClosingEventArgs e)// this event handler fires with the form starts to close
        {
            if (textSaved == false)// if the text has not been saved
            {
                dlgSave.Filter = "Rich Text Files (*.rtf)|*.rtf|Plaintext Files (*txt)|*.txt";// sets the filter for the save dialog
                result = MessageBox.Show("Do you wish to save your changes?", "Text Changed Since Last Save", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);// asks the user if they want to save the document
                if (result == DialogResult.Yes)// if the result of the message box dialog was yes
                {
                    msSaveFile_Click(sender, e);// simulate a save file button click
                }
                else if (result == DialogResult.Cancel)// if the result of the dialog is cancel
                {
                    e.Cancel = true;// cancel the shutdown
                }
            }
        }
    }
}// end of program