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I am new at I have a dropdownlist which is populated in code behind. When I select any item from dropdownlist, it should populate two textbox and another dropdownlist according to data from table.

<asp:DropDownList runat="server" ID="dropDownExisting"></DropDownList><br />
    <asp:TextBox ID="txtPromotion" runat="server" Width="77px" ></asp:TextBox><br />
    <asp:TextBox ID="txtSubject" runat="server" Width="288px"></asp:TextBox><br />
    <asp:DropDownList ID="dropDownType" runat="server">
        <asp:ListItem>Monthly Newsleter</asp:ListItem>
        <asp:ListItem>Webbinar Newsleter</asp:ListItem>

I want it to be done on client side. Where do I have to provide database connectivity? Do I require to use ajax control like update panel? Or javascript will work well? I don't want postback to happen. I want on client side.
Updated 10-Feb-14 18:43pm
Ami_Modi 11-Feb-14 0:44am    
I don't want postback to happen. I want to do it on client side

You can use ajax to perform as per your requirement.

Kindly have a look at solved question HERE

and further helping links can be found HERE

Hope it will help. :)
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I got beautiful ans Here.This is exactly what I wanted
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