Assignment:create an application like RUN

create new form place three buttons open file, cancel process or browse file from hard drive

source code of above forn as follows:

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;

namespace WindowsFormsApplication3

{

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

        }

        private void button3_Click(object sender, EventArgs e)

        {

            OpenFileDialog dv = new OpenFileDialog();

            dv.InitialDirectory = @"c;\";

            if (dv.ShowDialog() == DialogResult.OK)

            {

                textBox1.Text = dv.FileName;

            }

        }

        private void button2_Click(object sender, EventArgs e)

        {

            DialogResult d;

            d = MessageBox.Show("you want to EXIT", "quit", MessageBoxButtons.YesNo);

            if (d == DialogResult.Yes)

            {

            this.Close();

            }

        }

        private void button1_Click(object sender, EventArgs e)

        {

            string s=textBox1.Text;

            System.Diagnostics.Process.Start(s);

        }

        private void label1_Click(object sender, EventArgs e)

        {

        }

        private void label2_Click(object sender, EventArgs e)

        {

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

        }

    }

}

Assignment:create window application to browse further folders

create new form with three listboxes and one drop down menu

source code of above form is as follows:

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 WindowsFormsApplication4

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            DriveInfo[] dr = DriveInfo.GetDrives();

            foreach(DriveInfo d in dr)

            {

                comboBox1.Items.Add(d.Name);

             

            }

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            DirectoryInfo dr = new DirectoryInfo(comboBox1.Text);

            DirectoryInfo[] files = dr.GetDirectories();

            foreach (DirectoryInfo d in files)

            {

                listBox1.Items.Add(d.Name);

             

             

            }

         

        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            string s = comboBox1.Text + listBox1.Text;

            DirectoryInfo dr = new DirectoryInfo(s);

            FileInfo[] files = dr.GetFiles();

            listBox2.Items.Clear();

            foreach (FileInfo f in files)

            {

                listBox2.Items.Add(f.FullName);

            }

         

        }

        private void listBox2_SelectedIndexChanged(object sender, EventArgs e)

        {

            string st = comboBox1.Text + listBox1.Text +"\\"+ listBox2.Text;

            System.Diagnostics.Process.Start(st);

        }

    }

}

To create screensaver in c#

to create screensaver create new form add timer to it and put lable in form rename it as ur wish

source code for above form is as follows

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;

namespace WindowsFormsApplication8

{

    public partial class screensaver : Form

    {

        int a = 10;

        int b = 10;

        public screensaver()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            Point p = label1.Location;

            p.X = p.X + a;

            p.Y = p.Y + b;

            if (p.X <= 0 || p.X > (this.Width - label1.Width))

            {

                a = a * -1;

                Random r = new Random();

                int red = r.Next(0, 255);

                int green = r.Next(0, 255);

                int blue = r.Next(0, 255);

                label1.ForeColor = Color.FromArgb(r.Next(0, 255), r.Next(0, 255), r.Next(0, 255));

            }

            if (p.Y <= 0 || p.Y > (this.Height - label1.Height))

            {

                b = b * -1;

                Random r = new Random();

                int red = r.Next(0, 255);

                int green = r.Next(0, 255);

                int blue = r.Next(0, 255);

                label1.ForeColor = Color.FromArgb(r.Next(0, 255), r.Next(0, 255), r.Next(0, 255));

           

            }

            label1.Location = p;

        }

        private void screensaver_MouseMove(object sender, MouseEventArgs e)

        {

            this.Close();

        }

        private void screensaver_KeyDown(object sender, KeyEventArgs e)

        {

            this.Close();

        }

    }

}

the ouput of above program while running is shown below