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Vb.net: Datalist - Change objectdatasource select method depending on control

Last Modified: 2012-05-09
As shown in the code below, I have a datalist which gets its data from the objectDatasource - ObjectDataSource.

I also have tow link buttons and one repeater which is populated with Alpahets having the following click events it he code behind.

At the moment the datalist displayes data is linked to selectmethod SelectMethod="BindData".  I want to now change the behaviour of the datalist and datasource so that depending on the selection(click) of the linkbuttons or the repeater alpahets, i want to load the datalist with different data.

I have 3 different stored procs which get the required data. My problem is how do i link the click event of the link buttons or the alphbet repeater so that the relevant data is shown by the datalist.
<table cellpadding="0" cellspacing="0" border="0" align="center">
                                                    <td align="center">
                                                        <asp:LinkButton ID="lnkLastestEntries" runat="server" Text="50 Latest Entries" OnClick="LastestEntries_Click"
                                                            Enabled="true" />
                                                        <asp:LinkButton ID="lnkMostViewed" runat="server" Text="50 Most Viewed" OnClick="MostViewed_Click"
                                                            Enabled="true" />
                                                    <td align="center">
                                                        <asp:Repeater ID="rptAlphabets" runat="server">
                                                                <asp:LinkButton ID="lnkAlphabet" runat="server" Text='<%#Eval("Value")%>' OnClick="Alphabet_Click"
                                                                    Enabled='<%# Eval("isNotSelected")%>' />
                                                        <div style="position: relative; height: 545px; width: 420px; overflow: auto;">
                                                            <asp:DataList ID="dlContacts" runat="server" RepeatLayout="Table" RepeatColumns="1" dataSourceID="SDataSource" 

                                                                CellPadding="2" CellSpacing="2">
                                                                    <table cellpadding="2" cellspacing="0" border="0" style="width: 390px; border: solid 1px #D2E4FC;">
                                                                            <td rowspan="4" width="25%">
                                                                                <a href="?id=<%#Eval("pid")%>">
                                                               <div id="paging" align="center">
                    <asp:Label ID="lblPagerLocation" runat="server" />  
                    <asp:PlaceHolder ID="ViewAll" runat="server"></asp:PlaceHolder>
                    <a id="PrevPage" runat="server">
                        <asp:Image runat="Server" id="PrevImage"  src="http://myserver.com/static/images/previous.gif"
                              AlternateText="Previous page" /></a>
                    <asp:PlaceHolder ID="PageLinks" runat="server"></asp:PlaceHolder>
                    <a id="NextPage" runat="server">
                       <tz:Img runat="Server" id="NextImage" src="http://myserver.com/static/images/next.gif"
                           AlternateText="Next page" skinid="nextpage"/></a>
    <asp:ObjectDataSource ID="SDataSource"  TypeName="entries.Index" 
          Runat="server"      SelectMethod="BindData">
               <asp:QueryStringParameter Name="PageIndex" 
                 QueryStringField="PageIndex" DefaultValue="0" />
            <asp:QueryStringParameter Name="NumRows" 
                 QueryStringField="NumRows" DefaultValue="3" />
            <asp:Parameter Name="Count" 
                 Direction="Output" Type="Int32" />

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