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Display min max avg records in textbox

Posted By:satyapriyanayak       Posted Date: March 11, 2013    Points: 40    Category: ADO.NET    URL: http://www.dotnetspark.com  

Display min max avg records in textbox
 

how to Display min, max and average records in textbox in c#.

 

 

Program

 

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.Data.OleDb;

namespace Display_min_max_avg_records_in_textbox

{

    public partial class Form1 : Form

    {

        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];

        OleDbCommand com;

        OleDbDataAdapter oledbda;

        DataSet ds = new DataSet();

        string str;

      

      

        public Form1()

        {

            InitializeComponent();

        }

 

        private void Form1_Load(object sender, EventArgs e)

        {

            OleDbConnection con = new OleDbConnection(ConnectionString);

            con.Open();

            str = "select * from student";

            com = new OleDbCommand(str, con);

            oledbda = new OleDbDataAdapter(com);

            ds = new DataSet();

            oledbda.Fill(ds, "student");

            dataGridView1.DataSource = ds;

            dataGridView1.DataMember = "student";

            con.Close();

 

 

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            OleDbConnection con = new OleDbConnection(ConnectionString);

            con.Open();

            str = "select max(smarks)from student";

            com = new OleDbCommand(str, con);

            textBox1.Text = com.ExecuteScalar().ToString();

            con.Close();

 

        }

 

        private void button2_Click(object sender, EventArgs e)

        {

            OleDbConnection con = new OleDbConnection(ConnectionString);

            con.Open();

            str = "select min(smarks)from student";

            com = new OleDbCommand(str, con);

            textBox2.Text = com.ExecuteScalar().ToString();

            con.Close();

 

        }

 

        private void button3_Click(object sender, EventArgs e)

        {

            OleDbConnection con = new OleDbConnection(ConnectionString);

            con.Open();

            str = "select avg(smarks)from student";

            com = new OleDbCommand(str, con);

            textBox3.Text = com.ExecuteScalar().ToString();

            con.Close();

 

        }

    }

}



     

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