HI guys
I am fairly new to asp! and I am trying to start my first website but I have some problems .
in page name (Add-Goods) I have to drop down list that bind data from a database using sql server
the first one's name "listCatGoods" and the second's name "DsItems" which show elements from data base when listCatGoods selected change . so i try this:
<asp:DropDownList ID="listCatGoods" runat="server" DataSourceID="goodCat"
DataTextField="Name" DataValueField="ID" Height="16px" Width="151px"
onselectedindexchanged="listCatGoods_SelectedIndexChanged">
</asp:DropDownList>
<asp:SqlDataSource ID="goodCat" runat="server"
ConnectionString="<%$ ConnectionStrings:NewWebSite %>"
SelectCommand="SELECT [ID ...
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