Member Avatar for sasindagi

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)

  • 4 Contributors
  • 7 Replies
  • 121 Views
  • 2 Days Discussion Span
  • Latest Post Latest Post by arjunsasidharan

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Member Avatar for aravindkishore

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 because: Fixed formatting
Member Avatar for Infarction

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

Edited by pritaeas because: Fixed formatting
Member Avatar for sasindagi

error creating update panel any idea

Member Avatar for arjunsasidharan

Did you put the Update panel under the Script Manager? And did you install the AjaxToolKitExtender.vsi?

Member Avatar for sasindagi

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

Member Avatar for sasindagi

never mind i got javascript without postback in dropdownlist

Member Avatar for arjunsasidharan

Good for you.. :) so did it work?

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