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Get Dropdown list value - set label text

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Join Date: Mar 2008

Posts: 136

Reputation: cVz is an unknown quantity at this point

Solved Threads: 7

cVz

Offline

Junior Poster

Get Dropdown list value - set label text

Jun 12th, 2009

Hi everyone,

I would like to set a label's text when a dropdownlist item is selected

I want the label to display the value of the item, not the text.

Is there any way i can do so without refreshing the page i found the update panel loads far too long for my liking.

Javascript ???

i would like to do this using attributes

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
ddBenefitPeriod.Attributes.Add("selectedIndexChanged", string.Format("{0}.innertext = {1}.options[{1}.selectedIndex].value; ", lblBenefitPeriodFactor.ClientID, ddBenefitPeriod.ClientID));
ddBenefitPeriod.Attributes.Add("selectedIndexChanged", string.Format("{0}.innertext = {1}.options[{1}.selectedIndex].value; ", lblBenefitPeriodFactor.ClientID, ddBenefitPeriod.ClientID));

This does not work, can anyone give me some pointers please ??

Thanks in advance

Delphi & C# programmer deluxe...

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Join Date: Feb 2009

Posts: 3,187

Reputation: sknake has much to be proud of

Solved Threads: 571

sknake

Offline

.NET Enthusiast

Re: Get Dropdown list value - set label text

Jun 12th, 2009

Try this:

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="daniweb.web.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
			<asp:dropdownlist ID="Dropdownlist1" runat="server">
				<asp:ListItem Value="Value1">Text1</asp:ListItem>
				<asp:ListItem Value="Value2">Text2</asp:ListItem>
			</asp:dropdownlist>
			<br />
    	<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </div>
    </form>
</body>
</html>
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="daniweb.web.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
			<asp:dropdownlist ID="Dropdownlist1" runat="server">
				<asp:ListItem Value="Value1">Text1</asp:ListItem>
				<asp:ListItem Value="Value2">Text2</asp:ListItem>
			</asp:dropdownlist>
			<br />
    	<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </div>
    </form>
</body>
</html>

 Help with Code Tags 
 c# Syntax (Toggle Plain Text) 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
namespace daniweb.web
{
  public partial class WebForm1 : System.Web.UI.Page
  {
    protected void Page_Load(object sender, EventArgs e)
    {
      string script =
        string.Format("javascript:document.getElementById('{0}').innerText = {1}.options[{1}.selectedIndex].value;", 
        Label1.ClientID,
        Dropdownlist1.ClientID);
      Dropdownlist1.Attributes.Add("onChange", script);
    }
  }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace daniweb.web
{
  public partial class WebForm1 : System.Web.UI.Page
  {
    protected void Page_Load(object sender, EventArgs e)
    {
      string script =
        string.Format("javascript<b></b>:document.getElementById('{0}').innerText = {1}.options[{1}.selectedIndex].value;", 
        Label1.ClientID,
        Dropdownlist1.ClientID);
      Dropdownlist1.Attributes.Add("onChange", script);
    }
  }
}