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Sticky Notes Application Using Windows Forms and C#

Posted by Priyank Patel Articles | Windows Forms C# October 05, 2010
In this article you will learn how to create a sticky note application using C# Windows Forms.
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Introduction:

This is a Sticky note application using C# Windows Forms.

Steps:

1. Add a form in your application and make the form border style none. Set transparency key property as form background color so it will make your form transparent.

For viewing image for step1 see my article how to make screen saver.

2. Add a ContexMenuStrip, Timer control and add other controls as shown in the figure.

sticky.gif

3. Code Behind.


        /*
         *  When you run this application a directory named note and a text file named note.txt will generate in the C:\Program Files
         */
 
        //this is the exit menu of the contexmenustrip
        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {           
            this.Close();
        }
 
        //this is the Font menu of the contexmenustrip
        private void fontToolStripMenuItem_Click(object sender, EventArgs e)
        {           
            FontDialog font = new FontDialog();
            if (font.ShowDialog() == DialogResult.OK)
            {
                txt_note.Font = font.Font;               
            }
       }

       //this is the FontColor menu of the contexmenustrip   
        private void fontColorToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ColorDialog color = new ColorDialog();
            if (color.ShowDialog() == DialogResult.OK)
            {
                txt_note.ForeColor = color.Color;
            }
        }
 
        StreamWriter sw;
        StreamReader sr;
        FileStream note;
        private void Form_note_Load(object sender, EventArgs e)
        {    
            lbl_date.Text = System.DateTime.Now.ToLocalTime().ToString("dd/MM/yyyy  hh:mm:ss");
 
           //Time is enable in the form load even
            timer1.Start();
           
            createFile();
 
            readNote();
        }
 
        /*
         * creaFile() function is called in the Form load event
         * It generate the directory ann file as mention above.
         */

        private void createFile()
        {
            bool existDir = Directory.Exists(@"C:\Program Files\Note");
            bool exitFolder = File.Exists(@"C:\Program Files\Note\note.txt");
 
           //If directory and text file is generated then it will not generate again when you run application next time.
            if (!(existDir && exitFolder))
            {
                Directory.CreateDirectory(@"C:\Program Files\Note");
                note = File.Create(@"C:\Program Files\Note\note.txt");
                note.Close();
 
                sw = new StreamWriter(@"C:\Program Files\Note\note.txt");
                sw.Write("Have a nice day\nWel-come from Priyank");
                sw.Close();
            }
        }

       /*
        * This is the richTextBox which is set into the pictureBox2.
        * Whatever you write in this text box it will saved into the note.txt file.
        */ 
 
        private void txt_writeNote_TextChanged(object sender, EventArgs e)
        {
            sr.Close();
            sw = new StreamWriter(@"C:\Program Files\Note\note.txt");
            sw.Write(txt_writeNote.Text);
            sw.Close();
        }
       
        /*
         * After writing your note in the text box when you close second Panel readNote() function come to the action.
         * It reads all the lines from the note.txt and it will display in the txt_note.Text which is set in the pictureBox1
         */

        private void readNote()
        {
            double size;
            float size1;
            string text;//,style;
            FontStyle style;
 
            sr = new StreamReader(@"C:\Program Files\Note\note.txt");
            text = sr.ReadToEnd();
            txt_note.Text = text;
            txt_writeNote.Text = text;
            sr.Close();           
        }
 
        /*
         * when you click here panel2 will visible so you are able to write your note.
         */

        private void btn_add_Click(object sender, EventArgs e)
        {
            panel2.Visible = true;
        }

        /*
         * After click on close button you are able to see your note.
         */

        private void btn_close_Click(object sender, EventArgs e)
        {
            panel2.Visible = false;
            readNote();
        }       

        //Set the interval of the timer 1000.
        private void timer1_Tick(object sender, EventArgs e)
        {
            //display the current time and date
            lbl_date.Text =System.DateTime.Now.ToLocalTime().ToString("dd/MM/yyyy  hh:mm:ss");
       }

Here ends the note application. I hope you like it.

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