Generic Collection:List By:Tanuj Kumar

generic collection :

List<t>:

        

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 listgeniriccollection

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        List<int > lst = new List<int >();

        private void button1_Click(object sender, EventArgs e)

        {

            int i=int.Parse(textBox1 .Text );

         

           lst.Add(i);

                show();

                    

        }

      

        public void show() {

            listBox1.Items.Clear();

            foreach (Object obj in lst)

            {

                listBox1.Items.Add(obj);

            }

        }

        private void button2_Click(object sender, EventArgs e)

        {

            int i=int .Parse (textBox3 .Text );

            lst.Remove(i);

            MessageBox.Show("delete successfull");

            show();

        }

        private void button3_Click(object sender, EventArgs e)

        {int i=int.Parse (textBox2.Text );

        if (lst.Contains(i))

        {

            MessageBox.Show("available");

        }

        else {

            MessageBox.Show("Not available");

        }

        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)

        {

            if (!char.IsDigit(e.KeyChar)) {

                e.Handled=true  ;

                MessageBox.Show("string is not supported");

            }

        }

    }

}

Designer.cs:

            // textbox1

            this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress);

            // textBox2

            this.textBox2.Location = new System.Drawing.Point(80, 76);

            this.textBox2.Name = "textBox2";

            this.textBox2.Size = new System.Drawing.Size(100, 20);            this.textBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress);

  // textBox3

            this.textBox3.Location = new System.Drawing.Point(80, 114);

            this.textBox3.Name = "textBox3";

            this.textBox3.Size = new System.Drawing.Size(100, 20);            this.textBox3.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPres);

Posted By:Tanuj Kumar 

On:Shareyourconscience