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any idea about asynchronous drop downlist, on selected item of drop downlist with out causing server round trip how can we populate selected item into textbox.(with out postback or callback)

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Last Post by arjunsasidharan
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Hey Use AJAX Extension controls .Which are available at http://ajax.asp.net/default.aspx?tabid=47 .Download and install and use it.DOcumentation also there you can download it use it.

coming to your problem I solved using AJAX controls as

<script runat="server">

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        TextBox1.Text = DropDownList1.SelectedItem.Value;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
                    Width="100px">
                    <asp:ListItem Selected="True">first_item</asp:ListItem>
                    <asp:ListItem>second_item</asp:ListItem>
                </asp:DropDownList>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            </ContentTemplate>
        </asp:UpdatePanel>

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

I think this works

Edited by mike_2000_17: Fixed formatting

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aravindkishore, please use code tags when you post code. :icon_wink:

Edited by pritaeas: Fixed formatting

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yes i had installed AjaxToolKitExtender.vsi other than update panel i can see all controls

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