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Update Panel not refreshing

Posted on 2011-03-11
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Medium Priority
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1,395 Views
Last Modified: 2012-06-27
I have an update panel in a grid template that has a parent and child dropdown.  When the user selects a value from the first, I want the update panel to populate the second dropdown but not refresh the rest of the page.  

I can only get this to even load the second dropdown when I set AutoPostBack="true" in the 1st dropdown.  But this makes it refresh the whole page.  I tried removing that then setting the Update page UpdateMode="Always", but that doesn't do anything at all.  Any idea what I'm doing wrong here?
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
                  <ContentTemplate>                 

                    <cc2:OboutDropDownList ID="ddGenre" runat="server" Width="100"
                         DataSourceID="dsGenres" DataValueField="genre" AutoPostBack="true"
                         DataTextField="genre" AppendDataBoundItems="true">
                          <asp:ListItem Text="...Genre" Value="All" Selected="True"></asp:ListItem>
                    </cc2:OboutDropDownList>

                    <cc2:OboutDropDownList ID="ddSubGenre" runat="server" Width="120"
                         DataSourceID="dsSubGenres" DataValueField="subgenre" DataTextField="subgenre">                                                   
                    </cc2:OboutDropDownList>


                    <!-- Reality Genre / Sub Genre -->
                    <asp:SqlDataSource ID="dsGenres" runat="server" 
                        ConnectionString="<%$ ConnectionStrings:SmashHausConnectionString %>" 
                        SelectCommand="SELECT DISTINCT [genre] FROM [RealityGenres]"></asp:SqlDataSource>        
                
                    <asp:SqlDataSource ID="dsSubGenres" runat="server" 
                        ConnectionString="<%$ ConnectionStrings:SmashHausConnectionString %>" 
                        SelectCommand="SELECT subgenre FROM RealityGenres WHERE genre = @genre ORDER BY subgenre">
                        <SelectParameters>                        
                            <asp:ControlParameter ControlID="ddGenre" DefaultValue="TV" Name="genre" PropertyName="Text" Type="String" />
                        </SelectParameters>	    
                    </asp:SqlDataSource>        

                    </ContentTemplate>
                  </asp:UpdatePanel>

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Question by:JT_SIRO
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5 Comments
 
LVL 23

Expert Comment

by:Rajkumar Gs
ID: 35114507
Try UpdateMode="Conditional">
<asp:UpdatePanel id="UpdatePanel1" runat="server" UpdateMode="Conditional"> 

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Raj
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Accepted Solution

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Rajkumar Gs earned 168 total points
ID: 35114508
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LVL 14

Assisted Solution

by:dejaanbu
dejaanbu earned 332 total points
ID: 35115530
Hi,

You have to set AutoPostBack="true" in the 1st dropdown.

Then only, it will post back the values to server. Updatepanel will handle the postback and avoids whole page refreshing..

This should work..

Also you can set updatepanel's updatemode to conditional and select triggering events , If you have multiple updates..
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Author Comment

by:JT_SIRO
ID: 35124449
I'm still stuck.  I really don't know what the issue is.  My whole grid still refreshes every time I change ddGenre.  You can put an update panel in a grid template right?  Please help!  I've attached the code for the entire page so you can see.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Purgatory.aspx.cs" Inherits="Admin_Pages_Submissions" MasterPageFile="~/Admin_Pages/mpAdminNEWMENU.master"%>
<%@ Register Assembly="obout_Grid_NET" Namespace="Obout.Grid" TagPrefix="cc1" %>
<%@ Register Assembly="obout_Interface" Namespace="Obout.Interface" TagPrefix="cc2" %>
<%@ Register TagPrefix="obout" Namespace="Obout.ComboBox" Assembly="obout_ComboBox" %>


<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<div id="content" class="xfluid">
    <div class="portlet x12">   
        
    <!-- Form variables for the play/stop buttons -->
    <asp:HiddenField ID="HiddenField1" Value="0" runat="server" />
    <asp:HiddenField ID="hdnComposer" Value="0" runat="server" />
    <asp:HiddenField ID="hdnCD" Value="0" runat="server" />
    <asp:HiddenField ID="hdnLastImagePlayed" Value="0" runat="server" />
    
    <table width="100%">
    <tr>
    <td valign="bottom" style="vertical-align:bottom;">
        <div class="portlet-header-tighter" style="text-align:left; vertical-align:bottom; height:40px; width:205px; background:white;"> 
            <ul class="portlet-tab-nav">
            <!-- Tab Menu -->   
            <li class="portlet-tab-nav-active"><asp:LinkButton ID="LinkButton3" PostBackUrl="Purgatory.aspx" runat="server">Purgatory</asp:LinkButton></li>				
            <li class=""><asp:LinkButton ID="LinkButton2" PostBackUrl="RevisionNotes.aspx" runat="server">Revision Notes</asp:LinkButton></li>
            </ul>
	    </div> <!-- .portlet-header -->		

        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Always">
        <ContentTemplate>  
        &nbsp;<asp:TextBox ID="txtSearch" onfocus="if(this.value=='...Search'){this.value='';};" Text="...Search" runat="server" Width="175" CssClass="textboxstyle3" ></asp:TextBox>
        <asp:Button id="btnSearch" runat="server" Width="70" Text="Search" OnClick="btnSearch_Click" CssClass="btn btn-cart"/> 
        <asp:Button ID="btnReset" runat="server" Text="Reset" CssClass="btn btn-cart" OnClick="btnReset_Click" />
            &nbsp; Tracks:<asp:Label ID="lblCount" runat="server" Text="Label" EnableViewState="false"></asp:Label>
        </ContentTemplate>
        </asp:UpdatePanel>
    </td>
        
        
    <td valign="bottom" align="right" style="vertical-align:bottom; text-align:right">    
        <asp:Button ID="btnSave" runat="server" Text="PROCESS TRACKS" CssClass="btn btn-orange" OnClick="btnSave_Click" OnClientClick="(document.getElementById(upPurg).style.visibility='hidden');" />
    </td>
    
    <td width="500px;" align="right">
        <!-- FLASH PLAYER -->
        <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=10,0,0,0" width="450" height="80" id="player">
	    <param name="allowScriptAccess" value="always" />
	    <param name="allowFullScreen" value="false" />
	    <param name="movie" value="../Flash/player.swf" />
	    <param name="quality" value="high" /><param name="bgcolor" value="#dbdbdb" />
	    <embed swliveconnect="true" src="../Flash/player.swf" quality="high" bgcolor="#dbdbdb" width="450" height="80" name="player" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer" />
	    </object>
    </td>

    </tr>
    </table>

<div style="position: relative; width: 100%; overflow: scroll; height: 330px;">    
    
    <asp:GridView ID="gvTracks" runat="server" AutoGenerateColumns="False" ShowFooter="true" EmptyDataText="No Tracks to Process at this Time"  
            CellPadding="4" ForeColor="#333333" GridLines="None" Width="100%" Font-Size="X-Small">
        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
        <Columns>
            <asp:TemplateField HeaderText="Play">
                <ItemTemplate>
                    &nbsp;<img id="imgPlay<%# DataBinder.Eval(Container.DataItem, "Filename") %>" src="../images/musicsearch/play.png" alt="Play" onmousedown="javascript:changeImage('<%# DataBinder.Eval(Container.DataItem, "Filename").ToString().Replace(".wav",".mp3").Replace("'","987654") %>','', '<%# DataBinder.Eval(Container.DataItem, "Filename").ToString().Replace(".wav",".mp3").Replace("'","987654") %>');" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="Filename" HeaderText="Filename" ItemStyle-Width="150" />
            <asp:BoundField DataField="Username" HeaderText="Username" />
            <asp:BoundField DataField="status" HeaderText="Status" />
            <asp:TemplateField HeaderText="Notes" ItemStyle-Width="222">
                <ItemTemplate><cc2:OboutTextBox ID="tbNotes" runat="server" Text="" TextMode="multiline" Height="50" Width="220"></cc2:OboutTextBox></ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Action" ItemStyle-Width="250">
                <ItemTemplate>
                    Approve<asp:CheckBox ID="chkApprove" runat="server" />
                    Revise<asp:CheckBox ID="chkRevise" runat="server" />
                    Deny<asp:CheckBox ID="chkDeny" runat="server" />
                    Stem<asp:CheckBox ID="chkStem" runat="server" />                    
                </ItemTemplate>
            </asp:TemplateField>

            <asp:TemplateField HeaderText="Reality Genre" ItemStyle-Width="250">
                <ItemTemplate>
                  <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
                  <ContentTemplate>                 

                    <cc2:OboutDropDownList ID="ddGenre" runat="server" Width="100"
                         DataSourceID="dsGenres" DataValueField="genre" AutoPostBack="true"
                         DataTextField="genre" AppendDataBoundItems="true">
                          <asp:ListItem Text="...Genre" Value="All" Selected="True"></asp:ListItem>
                    </cc2:OboutDropDownList>

                    <cc2:OboutDropDownList ID="ddSubGenre" runat="server" Width="120"
                         DataSourceID="dsSubGenres" DataValueField="subgenre" DataTextField="subgenre">                                                   
                    </cc2:OboutDropDownList>

                    <!-- Data Sources - Genre / Sub Genre -->
                    <asp:SqlDataSource ID="dsGenres" runat="server" 
                        ConnectionString="<%$ ConnectionStrings:SmashHausConnectionString %>" 
                        SelectCommand="SELECT DISTINCT [genre] FROM [RealityGenres]"></asp:SqlDataSource>        
                
                    <asp:SqlDataSource ID="dsSubGenres" runat="server" 
                        ConnectionString="<%$ ConnectionStrings:SmashHausConnectionString %>" 
                        SelectCommand="SELECT subgenre FROM RealityGenres WHERE genre = @genre ORDER BY subgenre">
                        <SelectParameters>                        
                            <asp:ControlParameter ControlID="ddGenre" DefaultValue="TV" Name="genre" PropertyName="Text" Type="String" />
                        </SelectParameters>	    
                    </asp:SqlDataSource>        

                  </ContentTemplate>
                
                <Triggers>
                <asp:AsyncPostBackTrigger ControlID="ddGenre" EventName="SelectedIndexChanged" />
                </Triggers>
                </asp:UpdatePanel>

                </ItemTemplate>
            </asp:TemplateField>            
            
            <asp:TemplateField HeaderText="Submit to Job">
                <ItemTemplate>
                    <cc2:OboutDropDownList ID="ddJobs" DataSourceID="dsJobs" DataTextField="JobName" runat="server" Width="150" AutoPostBack="false" AppendDataBoundItems="true">
                          <asp:ListItem Text="...Select Job" Value="All" Selected="True"></asp:ListItem>
                    </cc2:OboutDropDownList>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
       
        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
        <HeaderStyle BackColor="#263849" Font-Bold="True" ForeColor="White" />
        <EditRowStyle BackColor="#999999" />
        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    </asp:GridView>
    

        <br /><br />
    </div> <!-- Close portlet x12-->
</div> <!-- Close xfluid-->


    <!-- DataSources -->
    <asp:SqlDataSource ID="dsJobs" runat="server" 
        ConnectionString="<%$ ConnectionStrings:SmashHausConnectionString %>" 
        SelectCommand="SELECT [JobName] FROM [Jobs_LookUp]"></asp:SqlDataSource>        
        

</asp:Content>

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LVL 14

Assisted Solution

by:dejaanbu
dejaanbu earned 332 total points
ID: 35170229
Try to put your hole grid inside updatepanel.. Because the grid has to rebind after changing any content know?.. i think so..

also u have 2 update panels. the first one has only 2 buttons and textbox.  if u really want to refresh ur content of textbox/label once one of the button is clicked then have the first one. also if it is needed to  update always, then let it be as it is. if not, make that also to be conditional and choose triggers.

Hope that helps...Good luck!
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