how can i update a label on selected index changed in dropdown

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ASP.NET

<asp:DropDownList ID="DropDownList1" runat="server" 
                onselectedindexchanged="DropDownList1_SelectedIndexChanged">
                <asp:ListItem>1
                <asp:ListItem>2
                <asp:ListItem>3
                <asp:ListItem>4
                <asp:ListItem>5
                <asp:ListItem>6

this is a dropdown

ASP.NET

<asp:Label ID="Label2" runat="server" Text="Label">

and this is a label

now i want to update a label on select of dropdown or change in dropdown and the updation shou ld be performed by ajax and i hv my own code on this event:

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
   {
       int factor = DropDownList1.SelectedIndex + 1;
       int pricein = int.Parse(Label2.Text);
       int totalPrice = pricein * factor;
       Label2.Text = totalPrice.ToString();
   }

Posted 9-Sep-13 21:16pm

Omprakash Kukana

Updated 9-Sep-13 21:20pm

TheUltimateDebugger

v3

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Comments

phil.o 10-Sep-13 3:22am

Please have a look at your previous question ; I updated my solution because I saw an potential problem.

Salman622 10-Sep-13 3:27am

you have given the label text as Label

what you want to do

weather u want to display as eg:- Label3.... 3 is your dropdown selected text and Label is Label2 text

2 solutions

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thatraja · Accepted Answer · 2013-09-09T21:42:00

Solution 1

Set AutoPostBack="true" for DropDownList.

Posted 9-Sep-13 21:42pm

thatraja

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2013-09-09T21:58:00

Solution 2

ASP.NET

<asp:label id="Label2" runat="server" xmlns:asp="#unknown">Text="Label"></asp:label>

Here Text of Label is "Label" and in the following line you are parsing it to integer.

C#

int pricein = int.Parse(Label2.Text);

What will be the output? :)

Also as thatraja suggested, you should set AutoPostBack="true" for DropDownList in order to fire DropDownList1_SelectedIndexChanged Event.

Posted 9-Sep-13 21:58pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Omprakash Kukana 10-Sep-13 4:14am

ya its working but i want to update label from ajax

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Sep-13 4:21am

Follow the answers here - Ajax on dropdownlist selected index changed event.

You need to use Ajax UpdatePanel.