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Update Gridview with an UpdatePanel - Can 28 Different Triggers Call The Same VB.NET Subroutine?
Posted on 2009-07-13
I have a Gridview with 28 linkbuttons which control the filtering of the gridview thru their OnClick events.
I'm trying to use the linkbuttons as Triggers for an Update Panel, and I started with the A linkbutton. In order to get the Gridview to update (and prevent a server error), I had explicitly define a lnkA_Click subroutine (because you have to specify a standard linkbutton event in the Trigger declaration). How can I avoid having to define a lnkB_Click, lnkC_Click etc subroutines for each trigger?
Before trying to convert I had a single subroutine which was associated with the OnClick events with all the linkbuttons, but I wasn't able to use it with the trigger. Any way to get all the triggers to call the same subroutine or do I have to explicitly define one for each trigger :(
I don't mind having to make 28 triggers, I just want to avoid blowing up my code file with 28 subroutines.
Thanks for any ideas!
I'm trying to use the linkbuttons as Triggers for an Update Panel, and I started with the A linkbutton. In order to get the Gridview to update (and prevent a server error), I had explicitly define a lnkA_Click subroutine (because you have to specify a standard linkbutton event in the Trigger declaration). How can I avoid having to define a lnkB_Click, lnkC_Click etc subroutines for each trigger?
Before trying to convert I had a single subroutine which was associated with the OnClick events with all the linkbuttons, but I wasn't able to use it with the trigger. Any way to get all the triggers to call the same subroutine or do I have to explicitly define one for each trigger :(
I don't mind having to make 28 triggers, I just want to avoid blowing up my code file with 28 subroutines.
Thanks for any ideas!
<tr>
<td colspan="2">
<br />
<asp:Panel ID="pnlFilter" runat="server" CssClass="TextLabel" OnClick="LetterChanged">
<asp:LinkButton ID="lnk0" runat="server" Text="[0-9]" ></asp:LinkButton>
<asp:LinkButton ID="lnkA" runat="server" Text="A" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkB" runat="server" Text="B" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkC" runat="server" Text="C" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkD" runat="server" Text="D" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkE" runat="server" Text="E" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkF" runat="server" Text="F" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkG" runat="server" Text="G" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkH" runat="server" Text="H" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkI" runat="server" Text="I" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkJ" runat="server" Text="J" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkK" runat="server" Text="K" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkL" runat="server" Text="L" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkM" runat="server" Text="M" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkN" runat="server" Text="N" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkO" runat="server" Text="O" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkP" runat="server" Text="P" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkQ" runat="server" Text="Q" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkR" runat="server" Text="R" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkS" runat="server" Text="S" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkT" runat="server" Text="T" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkU" runat="server" Text="U" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkV" runat="server" Text="V" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkW" runat="server" Text="W" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkX" runat="server" Text="X" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkY" runat="server" Text="Y" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkZ" runat="server" Text="Z" AutoPostBack="True"></asp:LinkButton>
<asp:LinkButton ID="lnkAll" runat="server" Text="ALL" AutoPostBack="True"></asp:LinkButton>
</asp:Panel>
<asp:UpdatePanel ID="updList" runat="server">
<ContentTemplate>
<asp:Panel ID="pnlProdList" runat="server" Height="300px" Width="800px" ScrollBars="both">
<asp:HiddenField ID="hdnLetter" runat="server" />
<asp:GridView ID="gvProd" runat="server" BackColor="#EEEEEE" GridLines="horizontal" AllowSorting="false" CssClass="TextLabel" Width="780px"
AutoGenerateColumns="false" DataKeyNames="key" EnableViewState="false" >
<SelectedRowStyle BackColor="LightYellow" Font-Bold="true" />
<HeaderStyle BackColor="LightSlateGray" ForeColor="White" />
<AlternatingRowStyle BackColor="#DDDDDD" Font-Bold="false" />
<RowStyle Font-Bold="false" />
<Columns>
<asp:CommandField SelectText="Details." ShowSelectButton="true" />
<asp:BoundField DataField="prodname" HeaderText="Name" SortExpression="prod" />
</Columns>
</asp:GridView>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lnkA" EventName="Click"></asp:AsyncPostBackTrigger>
<asp:AsyncPostBackTrigger ControlID="lnkB" EventName="Click"></asp:AsyncPostBackTrigger>
<!-- Will include a trigger for each letter I guess :( -->
</Triggers>
</asp:UpdatePanel>
</td>
</tr>
'PROBLEM - DON'T WANT TO HAVE TO MAKE 27 OF THESE FUNCTIONS, 1 FOR EACH LETTER/OPTION
Protected Sub lnkA_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lnkA.Click
'SEt the hidden filter letter value based on the clicked letter & rebind datasource
If CType(sender, LinkButton).Text = "ALL" Then
hdnLetter.Value = "%"
Else
hdnLetter.Value = CType(sender, LinkButton).Text
End If
'This function below pulls filtered list data and rebinds the gridview
GetProdListData(sender, e)
End Sub
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2
3 Comments
Just call your Routine HandleLinkClick or something more generic, and you can specify the same handler for all you link buttons and then
handle the differnces in their.
Remove the Handles lnkA.Click and put it in your markup for each one, like :
<asp:LinkButton ID="lnkA" runat="server" Text="A" OnClick="HandleClickLink" AutoPostBack="True"></asp:
handle the differnces in their.
Remove the Handles lnkA.Click and put it in your markup for each one, like :
<asp:LinkButton ID="lnkA" runat="server" Text="A" OnClick="HandleClickLink" AutoPostBack="True"></asp:
Hello ,
See first line of attached code.
You can avoid that by adding lnkC.Click , lnkD.Click
Protected Sub lnkA_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lnkA.Click, lnkB.Click , lnkC.Click , lnkD.Click
Try and tell.
See first line of attached code.
You can avoid that by adding lnkC.Click , lnkD.Click
Protected Sub lnkA_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lnkA.Click, lnkB.Click , lnkC.Click , lnkD.Click
Try and tell.
Protected Sub lnkA_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lnkA.Click, lnkB.Click , lnkC.Click
'SEt the hidden filter letter value based on the clicked letter & rebind datasource
If CType(sender, LinkButton).Text = "ALL" Then
hdnLetter.Value = "%"
Else
hdnLetter.Value = CType(sender, LinkButton).Text
End If
'This function below pulls filtered list data and rebinds the gridview
GetProdListData(sender, e)
End Sub
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