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how to get invisible column from gridview and put in a tooltip

I have to get the data from the invisible Label "LabelTooltip" and put the text as a tooltip in the
asp:HyperLink ID="hlUrl". I think i need some c# code behind but don't know to do this.

            <div id="MasterPageEvents">
                <div id="MasterPageEventsDatesLeftSideMargin">
                <div id="MasterPageEventsDates">
                    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" ShowHeader="False"
                        DataSourceID="SqlDataSourceLakeEvents" AllowPaging="True" GridLines="None" PageSize="3"
                        Caption="Upcoming Events" CaptionAlign="Top" BackColor="Transparent" EmptyDataText="No Events Found"
                        Font-Size="Medium" BorderStyle="Solid" BorderWidth="5px" CellPadding="5"
                        <RowStyle Font-Strikeout="False" ForeColor="Black" />
                            <asp:TemplateField HeaderText="Time" SortExpression="Time">
                                    <asp:Label ID="Labeldate" runat="server" Text='<%# (Eval("EventDate","{0:g}")) %>'
                                    <asp:HyperLink ID="hlUrl" runat="server" NavigateUrl='<%# "EventsShowcase.aspx?eventid=" + Eval("EventId") %>'
                                        Text='More...' ToolTip="Tooltip goes here" />
                                        <br />

                                    <asp:Label ID="LabelTooltip" runat="server" Text='<%# (Eval("tooltip"))%>' Visible="False">
</asp:Label><br />
                                <ItemStyle Font-Size="Medium" HorizontalAlign="Left" Wrap="False" />
                        <PagerStyle ForeColor="Black" />
                    <asp:SqlDataSource ID="SqlDataSourceLakeEvents" runat="server" ConnectionString="<%$ ConnectionStrings:LLIAConnectionString %>"
                        SelectCommand="SELECT events.eventcomment, events.eventdate, events.eventid, events.tooltip FROM events INNER JOIN eventtype ON events.eventtype = eventtype.eventtype WHERE (events.eventdate &gt;= GETDATE()) ORDER BY events.eventdate">
1 Solution
You do not need serverside or client side code for that, try to change the mark up like the one shown below.
All you need to do is add ToolTip='<%# (Eval("tooltip"))%>' in your <asp:HyperLink> tag.
<asp:HyperLink ID="hlUrl" runat="server" NavigateUrl='<%# "EventsShowcase.aspx?eventid=" + Eval("EventId") %>' Text='More...' ToolTip='<%# (Eval("tooltip"))%>' />

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ggaarryyAuthor Commented:
Thanks so much.!it's amazing sometimes how easy something looks when you see how do do.

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