Using Inline Expression on Label and dropDown

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I bind a dropdownlist control to values retrieve from database. I want to use an inline expression to display the text selected by user from the dropdown control, but it's not working. Here is the code i use.

ASP.NET

<asp:Label ID="Label1" runat="server" Text="<%# DropDownListVehicleGpsDateTime.SelectedText.ToString()%>">

Posted 11-Oct-11 9:13am

ahmedfaruk88

Updated 11-Oct-11 9:36am

Mehdi Gholam

v2

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Roy Heil · Answer 1 · 2011-10-11T16:12:00

You are only showing the one line of code, so it's difficult to know exactly what is happening here, but I think you are having trouble with client-side vs. server-side programming.

The inline code is interpreted at the server in codebehind, during postback. But the user selects from the dropdown list at runtime at the client, without causing a postback. So the inline code is not having the opportunity to run.

If you need this event to be client-side, you need to set an onchange event for the dropdown, and write some javascript to update the value of Label1.

Muralikrishna8811 · Answer 2 · 2011-10-11T19:29:00

Solution 2

Hi,

its works only on pageloads from server.

what exactly you want to do.

If you want to bind dropdown selected value into Label.

check this code once

JavaScript

$("#Label").text($("#DropDownListVehicleGpsDateTime").Value);

invoke this javascript line on dropdownlist selction change

All the Best

Posted 11-Oct-11 19:29pm

Muralikrishna8811

Comments

ahmedfaruk88 13-Oct-11 7:48am

I really appreciate your response and the time you give to answer this question. On_Page load of the .aspx file the dropdownlist is binded and the selected value is display in the label control here is what i finally did.
<asp:Label ID="Label1" runat="server" Text="<%# DropDownListVehicleGpsDateTime.SelectedItem.ToString()%>">

Muralikrishna8811 13-Oct-11 7:55am

Hi,

you 've to write my code in

onchange event of dropdownlist
like
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script language ="javascript" >

function f1() {

document.getElementById('<%=Label1.ClientID %>').innerText = document.getElementById('<%=DropDownList1.ClientID %>').value
}
</script>
</head>
<body önload="f1()">
<form id="form1" runat="server">

<asp:Label ID="Label1" runat="server" Text="Label">

<asp:DropDownList ID="DropDownList1" runat="server" onchange="f1()">
<asp:ListItem Text ="gfhdg" Value ="gfhgh">
<asp:ListItem Text ="gfgdfghdg" Value ="gfdfghgh">
<asp:ListItem Text ="gfhdfgdfdg" Value ="gffgdfgfghgh">

</form>
</body>
</html>

Muralikrishna8811 13-Oct-11 7:56am

coming to your question if you use that its just loads on page refresh only that means when page loads from server.

ahmedfaruk88 · Answer 3 · 2011-10-13T01:48:00

I really appreciate your response and the time you give to answer this question. On_Page load of the .aspx file the dropdownlist is binded and the selected value is display in the label control here is what i finally did.
<asp:Label ID="Label1" runat="server" Text="<%# DropDownListVehicleGpsDateTime.SelectedItem.ToString()%>"> </asp:Label>

Using Inline Expression on Label and dropDown

3 solutions

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