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Nongeneric Collection:Hash Table By:Tanuj Kumar


Nongeneric Collection:Hash Table


Hash table :Nongeniric collection
Nongeneric Collection:Hash Table



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.Collections;

namespace hashtableprogram
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        String s;
        Hashtable ht = new Hashtable();


        private void button1_Click(object sender, EventArgs e)
        {
            ht.Add(textBox1.Text, textBox2.Text);
            listBox1 .Items .Clear ();
           foreach (DictionaryEntry de in ht)
            {
                listBox1.Items.Add(de.Key+" "+de.Value );
 
            }
            MessageBox.Show("saved");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show("not working now");
        }

        private void button5_Click(object sender, EventArgs e)
        {
            try
            {
                ht.Remove("1");
               
            ht.Remove(textBox3.Text);
                ht.Remove(textBox4.Text);
                listBox1.Items.Remove(textBox3.Text + " " + textBox4.Text);
                MessageBox.Show("deleted");
            }
            catch
            {
            MessageBox.Show ("Not Deleted");
            }
        }

        private void textBox5_TextChanged(object sender, EventArgs e)
        {

        }

        private void button6_Click(object sender, EventArgs e)
        {
          
           
            if(ht.Contains (textBox5 .Text))
            {     MessageBox .Show ("available");
            }
            else
            {
            MessageBox .Show ("not available");
            }
            }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {
           
        }

        private void button7_Click(object sender, EventArgs e)
        {

            foreach (DictionaryEntry de in ht)
            {
                label3.Text = (de.Key + " " + de.Value);

            }
        }}}


hashtable assignment:
Hash table

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.Collections;

namespace hashtablewithfnlbutton
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Hashtable ht = new Hashtable();
        int i = 1,j;
       

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text==""||textBox2.Text== "") {

                MessageBox.Show("Enter name or Roll no.");
            }
            else {
               
                Class1 obj = new Class1();
                obj.Name = textBox1.Text;
                obj.Rollno = textBox2.Text;
                ht.Add(i, obj);
                i++;
          

            
                MessageBox.Show("saved");
            }



        }
     
 

        private void button5_Click(object sender, EventArgs e)
        {
            if (i == ht.Count)
            {

                MessageBox.Show("already on last");
            }
            else
            {
                i =ht.Count;
                Class1 obj = new Class1();
                obj = (Class1 )ht[i];
                textBox1.Text = obj.Name;
                textBox2.Text = obj.Rollno;
           
           
            }
        }

       

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (textBox4.Text == "")
            {
                MessageBox.Show("Enter input");
            }
            else
            {
                if(ht.Count ==0){
               
                 MessageBox.Show("no value stored");
                }else{j = int.Parse(textBox4.Text);
                      if (j == 0)
                {
                    MessageBox.Show("value starts from 1");
                }
                    else if (j <= ht.Count)
                {
                    Class1 obj = new Class1();
                    obj = (Class1)ht[j];
                    textBox1.Text = obj.Name;
                    textBox2.Text = obj.Rollno;
                }
              

                else
                {

                    MessageBox.Show("no valid input");
                }
            }}

        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (i == 1)
            {
                MessageBox.Show("already on first record");
            }
            else
            {
                i = 1;
                Class1 obj = new Class1();
               obj =(Class1 ) ht[i];
                textBox1.Text = obj.Name;
                textBox2.Text = obj.Rollno;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (i == ht.Count)
            {
                MessageBox.Show("you already on last record");

            }
            else {
                i = i + 1;
                Class1 obj = new Class1();
                obj = (Class1)ht[i];
                textBox1.Text = obj.Name;
                textBox2.Text = obj.Rollno;

           
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (i == 1)
            {
                MessageBox.Show("already on first record");
            }
            else
            {
                i = i-1;
                Class1 obj = new Class1();
                obj = (Class1)ht[i];
                textBox1.Text = obj.Name;
                textBox2.Text = obj.Rollno;
            }
        }
    }
}
Classcoding:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace hashtablewithfnlbutton
{
    class Class1
    {
        string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        string rollno;

        public string Rollno
        {
            get { return rollno; }
            set { rollno = value; }
        }
    }
}

Posted By:Tanuj Kumar 
On:Shareyourconscience



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