Rajesh Kamalakshan: How to select an item in a dropdown (combobox) by its values using JavaScript?

Friday, May 28, 2010

How to select an item in a dropdown (combobox) by its values using JavaScript?

You can select an item a by its values using the below code.

<!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>Untitled Page</title>
    <script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        Button1.Attributes.Add("OnClick", "return oncick()");
    }
    </script>
    <script language="javascript" type="text/javascript">
    function oncick()
    {
        var Dropdoan=document .getElementById("<%=DropDownList1.ClientID  %>")
        for(i=0;i<Dropdoan.length;i++)
        {
            if(Dropdoan.options[i].value=="c")
            {
                Dropdoan.options[i].selected = true;
            }
        }
    }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:DropDownList ID="DropDownList1" runat="server">
        <asp:ListItem Value="a">Rajesh</asp:ListItem>
        <asp:ListItem Value="b">Renjith</asp:ListItem>
        <asp:ListItem Value="c">Smitha</asp:ListItem>
    </asp:DropDownList>
    <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
</form>
</body>
</html>
textarea><br />;

You can also get more information regarding various function and propertied of a dropdown (combobox) from the below link. http://www.navioo.com/javascript/dhtml/Changing_Select_Element_Content_two_Combobox_2755.html

Rajesh Kamalakshan

Friday, May 28, 2010

How to select an item in a dropdown (combobox) by its values using JavaScript?

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