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How to get Dropdown Selected value using javascript in ASP.NET?

I have dropdownlist box, when I change the value in the dropdownlist box javascript function get fired. And it will shows the selected value in the popup box.

HTML

So first add an aspx page into your project & paste the below code for asp:dropdownlist under the form div section:

<asp:DropDownList ID="DropDownList1" runat="server" OnChange="javascript:GetDropDownValue()">

<asp:ListItem Value="1">C#</asp:ListItem>

<asp:ListItem Value="2">ASP</asp:ListItem>

<asp:ListItem Value="3">WPF</asp:ListItem>

<asp:ListItem Value="4">WCF</asp:ListItem>

<asp:ListItem Value="5">C++</asp:ListItem>

asp:DropDownList>

Javascript

Add javascript function in head tag

function GetDropDownValue()

{

var IndexValue = document.getElementById('<%=DropDownList1.ClientID %>').selectedIndex;

var SelectedVal = document.getElementById('<%=DropDownList1.ClientID %>').options[IndexValue].text;

alert(SelectedVal);

}

Output

Download

Download Code Here….

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