LOAD DATA FROM SQL TABLE AND MULTIPLY QUNTY AND RATE

Question

i have table like(items and price)

ITEMS

Sno Items Rate

1 Chips 4.5

2 Cake 10

3 Samosa 5

i have front end like below

Items Qunty Amount

label1 4 label4

label2 5 label5

label3 3 label6

label1,label2,label3 load data ITEMS COLOUM from ITEMS TABLE

when i enter qunty in textbox .. LABEL4 DISPLAY qunty multiply rate in Items Table ( 4.5 * 2=9)

i want o/p like

Items Qunty Amount

Chips 2 9

Cake 5 50

Samosa 3 15

PLZ WRITE CSHARP CODE..................

Ranjit Powar · Answer

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.SqlClient; namespace CCornerItemDemo { public partial class Form1 : Form { SqlConnection conn; SqlDataAdapter da; DataSet ds; public Form1() { InitializeComponent(); } private void Form1_Load(object sender EventArgs e) { conn = new SqlConnection(data source=.;initial catalog=ranjit;integrated security=true); da = new SqlDataAdapter(select Items from Itemsconn ); ds = new DataSet(); da.Fill(ds); label1.Text = ds.Tables[0].Rows[0][Items].ToString(); label2.Text = ds.Tables[0].Rows[1][Items].ToString(); label3.Text = ds.Tables[0].Rows[2][Items].ToString(); } private void textBox1_TextChanged(object sender EventArgs e) { da = new SqlDataAdapter(select Rate from Items Where sno=1 conn); ds = new DataSet(); da.Fill(ds); double rate = Convert.ToDouble(ds.Tables[0].Rows[0][Rate].ToString()); double qty; if (string.IsNullOrEmpty(textBox1.Text)) { qty = 0; } else qty = Convert.ToDouble(textBox1.Text ); label6.Text = (rate * qty).ToString(); } private void textBox2_TextChanged(object sender EventArgs e) { da = new SqlDataAdapter(select Rate from Items Where sno=2 conn); ds = new DataSet(); da.Fill(ds); double rate = Convert.ToDouble(ds.Tables[0].Rows[0][Rate].ToString()); double qty; if (string.IsNullOrEmpty(textBox2.Text)) { qty = 0; } else qty = Convert.ToDouble(textBox2.Text); label5.Text = (rate * qty).ToString(); } private void textBox3_TextChanged(object sender EventArgs e) { da = new SqlDataAdapter(select Rate from Items Where sno=3 conn); ds = new DataSet(); da.Fill(ds); double rate = Convert.ToDouble(ds.Tables[0].Rows[0][Rate].ToString()); double qty; if (string.IsNullOrEmpty(textBox3.Text)) { qty = 0; } else qty = Convert.ToDouble(textBox3.Text); label4.Text = (rate * qty).ToString(); } } }