how to multiply textbox value and dropdown value asp.net

Question

how to sum textbox value and dropdown value in asp.net.. the dropdown value as 300 and the textbox value is 30 total is 330 my design is border-width: thin; background-color: #D7D7D7; width:50% > BILLING DETAILS > onselectedindexchanged=DropDownList1_SelectedIndexChanged Width=146px>   onselectedindexchanged=DropDownList2_SelectedIndexChanged Height=16px Width=146px> Select onselectedindexchanged=DropDownList3_SelectedIndexChanged Width=149px> vat/ i need requiredno * price

Iftikar Hussain · Answer

Hi You can do by using javascript function GetTotal() { var val1 = document.getElementById(DropDownList1).value; var val2 = document.getElementById(TextBox1).value; if (val1 !=  && val2 != ) { var total=parseInt(val1)+parseInt(val2); alert(total); } } call this method on button click Regards Iftikar

selvi subramanian · Answer

from dropdown value and textbox value need to multiply now

Iftikar Hussain · Answer

I am confused now. Earlier you are asking about multiply and now sum Regards Iftikar

selvi subramanian · Answer

it sum the dropdown and text box not multiply.Hussain

Iftikar Hussain · Answer

you can do but in what condition you need to display. Regards Iftikar

selvi subramanian · Answer

ya thanks .how to multiply.. without use button click event

Iftikar Hussain · Answer

you can do only in javascript don't postback. try like this onhange=GetTotal(); Height=16px Width=146px> function GetTotal() { var val1 = document.getElementById( ).value; var val2 = document.getElementById( ).value; if (val1 !=  && val2 != ) { var total=parseInt(val1)*parseInt(val2); document.getElementById( ).innerHtml=total; } } Regards Iftikar

selvi subramanian · Answer

have to multiply dropdown3 and textbox3

selvi subramanian · Answer

using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class Admin_Default : System.Web.UI.Page { REMO sel = new REMO(); DataSet ds = new DataSet(); string s = ConfigurationManager.AppSettings[RM].ToString(); SqlConnection cn = new SqlConnection(); SqlCommand cd = new SqlCommand(); SqlDataAdapter da = new SqlDataAdapter(); protected void Page_Load(object sender EventArgs e) { if (!IsPostBack) { prr(); sno(); pqice(); txtdate.Text = System.DateTime.Now.ToShortDateString(); } } private void sno() { // int z = 0; //ListItem cb = new ListItem(); // ds = sel.GETDS(select Billno from numbeer); ds = sel.GETDS(select min (Billno) as Billno from numbeer where status='view'); foreach (DataRow dr in ds.Tables[0].Rows) { //ListItem sw = new ListItem(); txtbillno.Text = dr[Billno].ToString(); //sw.Value = Convert.ToString(z + 1); } } private void pqice() { ListItem lik = new ListItem(); lik.Text = Select; lik.Value = 0; for (int se = 300; se <= 700; se++) { DropDownList3.Items.Add(Convert.ToString(se)); } } private void prr() { int s = 0; ListItem lim = new ListItem(); lim.Text = Select; //lim.Value = 0; DropDownList1.Items.Add(lim.ToString()); ds = sel.GETDS(select DISTINCT name from demo); foreach (DataRow dr in ds.Tables[0].Rows) { ListItem ss = new ListItem(); lim.Text = dr[name].ToString(); lim.Value = Convert.ToString(s + 1); DropDownList1.Items.Add(lim.ToString()); } } protected void DropDownList1_SelectedIndexChanged(object sender EventArgs e) { DropDownList2.Items.Clear(); DataSet ds = new DataSet(); string qr = select weight from demo where name=' + DropDownList1.SelectedValue.ToString() + '; ds = sel.GETDS(qr); ListItem se = new ListItem(); se.Value = 0; se.Text = Select; foreach (DataRow dr in ds.Tables[0].Rows) { ListItem liz = new ListItem(); //liz.Text = Select; liz.Value = dr[weight].ToString(); DropDownList2.Items.Add(liz.ToString()); } } protected void DropDownList2_SelectedIndexChanged(object sender EventArgs e) { ListItem sss = new ListItem(); sss.Text = Select; DataSet ds = new DataSet(); string sq = select price from demo where weight=' + DropDownList2.SelectedItem.ToString() + '; ds = sel.GETDS(sq); TextBox1.Text = ds.Tables[0].Rows[0][price].ToString(); foreach (DataRow dr in ds.Tables[0].Rows) { TextBox1.Text = dr[price].ToString(); } } protected void Button1_Click(object sender EventArgs e) { //string qrt = insert into cement (DateBillNoCustomerNameAddressProductNameQuantityPriceExtra) values (' + txtdate.Text; //qrt += '' + txtbillno.Text; //qrt += '' + txtcn.Text; //qrt += '' + txtad.Text; //qrt += '' + DropDownList1.SelectedItem.ToString(); //qrt += '' + DropDownList2.SelectedItem.ToString(); //qrt += '' + TextBox1.Text; //// qrt += '' + ddprice.SelectedItem.ToString(); //qrt += '' + txtex.Text; //qrt += '); //sel.Insert(qrt); //Label10.Visible = true; //Label10.Text = Sucess; //cn = new SqlConnection(s); //cn.Open(); //string qrs = insert into product (dateProductBillNoProductNameQuantityPriceExtra) values (' + txtdate.Text; //qrs += '' + TextBox2.Text; //qrs += '' + txtbillno.Text; ////sqrs += '' + txtcn.Text; //qrs += '' + DropDownList1.SelectedItem.ToString(); //qrs += '' + DropDownList2.SelectedItem.ToString(); //qrs += '' + TextBox1.Text; ////qrs += '' + ddprice.SelectedItem.ToString(); //qrs += '' + txtex.Text; //qrs += '); ////sel.Insert(qrs); //cd = new SqlCommand(qrs cn); //cd.ExecuteNonQuery(); //cn.Close(); string up = update numbeer set status='Viewed' where Billno=' + txtbillno.Text + '; sel.Insert(up); } protected void Button2_Click(object sender EventArgs e) { txtbillno.Text = ; txtcn.Text = ; txtad.Text = ; DropDownList1.SelectedValue = Select; //DropDownList2.SelectedValue = Select; TextBox1.Text = ; txtex.Text = ; } //protected void txtbillno_TextChanged(object sender EventArgs e) //{ // string up = update numbeer set status='Viewed' where Billno=' + txtbillno.Text + '; // sel.Insert(up); //} //protected void txtcn_TextChanged(object sender EventArgs e) //{ // string up = update numbeer set status='Viewed' where Billno=' + txtbillno.Text + '; // sel.Insert(up); //} protected void DropDownList3_SelectedIndexChanged(object sender EventArgs e) { txttp.Text =sum:+(Convert.ToInt32(DropDownList3.SelectedValue) + Convert.ToInt32(TextBox1.Text)); } }

Sanjeeb Lenka · Answer

plz share your code.......

selvi subramanian · Answer

its not working

Sanjeeb Lenka · Answer

try this: in aspx: select 100 300 onclick=btnAdd_Click /> in .cs: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default2 : System.Web.UI.Page { protected void Page_Load(object sender EventArgs e) { } protected void btnAdd_Click(object sender EventArgs e) { Label1.Text = sum : +( Convert.ToInt32(DropDownList1.SelectedValue) + Convert.ToInt32(TextBox1.Text)); } }