All geek questions in one place

Running UpdatePanel script fails

I am writing an ASP.NET webpage for use on a SharePoint site and am trying to use the UpdatePanel to render query results. I want to use the jQuery plugin to modify the table returned from an asynchronous postback, but I am unable to run the script in asynchronous udpate.

I found this post which indicates that UpdatePanel will not execute eval () on startup scripts; instead, you should register the script run block with the ScriptManager . All this makes sense until it works. The MSDN reference documentation seems to be consistent with the approach taken there.

My control is too long to be published in its entirety, but here is a reduced view, which I think covers everything that matters. Forgive me if there are no missing controls in the paste - I had to remove some parts, and maybe there may be some dangling tentacles. Below is the web part code, which is not like SmartPart, which loads a user control (.ascx).

As you can see, I am using the ScriptManager.RegisterStartupScript method. I tried both overloads; once for the page and once for the ListView (renamed as "AspListView"), which is located on the update panel. In any case, the script is run asynchronously, and I don’t understand why.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;

namespace MyNamespace
{
    using AspListView = System.Web.UI.WebControls.ListView;

    [Guid("601b3bdb-ed2a-4ec8-8a40-c37de8ab048d")]
    public class ListSearch : StaticTemplateWebPart
    {
        private AspListView resultsList;

        public ListSearch()
        {
        }

        protected override void CreateChildControls()
        {            
            base.CreateChildControls();

            ScriptLink.Register(Page, "jquery-1.3.2.js", false);
            ScriptLink.Register(Page, "jquery-ui-1.7.2.custom.min.js", false);
            ScriptLink.Register(Page, "jquery.timepickr.js", false);
            ScriptLink.Register(Page, "jquery.quicksearch.js", false);

            string scriptBlock =
@"
if ($('table#discrepancy-results').length)
{
    $('table#discrepancy-results tr').quicksearch({
        position: 'before',
        attached: 'table.results',
        stripeRowClass: ['odd', 'even'],
        labelText: 'Keyword Search'
    });
}";
            ScriptManager.RegisterStartupScript(Page, typeof(Page), UniqueID, scriptBlock, true);

            /* adding other controls, getting references, databinding, etc. */

        }             

        void searchButt_Click(object sender, EventArgs e)
        {           
            if (Page.IsPostBack)
            {
                var beginDT = DateTime.Parse((beginDateText.Text ?? "") + " " + (beginTimeText.Text ?? ""));
                var endDT = DateTime.Parse((endDateText.Text ?? "") + " " + (endTimeText.Text ?? ""));
                var dataList = SPContext.Current.Web.Lists["MyDataList"].Items;

                var results = SearchListItems(dataList, beginDT, endDT, keywordText.Text ?? "");
                if (results.Count > 0)
                {
                    resultsList.DataSource = results;
                    resultsList.DataBind();
                }
            }
        }
    }
}

And the user control that loads:

<%@ Control Language="C#" ClassName="ListSearchControl" %>

<% if (false)
   { %>
    <script src="../../LAYOUTS/jquery-1.3.2-vsdoc2.js" type="text/javascript"></script>    
<% } %>

<script type="text/javascript">
    $(function() {
        $('id').trigger('click');
        $('#<%= BeginTime.ClientID %>').timepickr({
            handle: '#<%= BeginTimeTrigger.ClientID %>',
            convention: 12,
            trigger: 'nothing' 
        });
        $('#<%= EndTime.ClientID %>').timepickr({
            handle: '#<%= EndTimeTrigger.ClientID %>',
            convention: 12,
            trigger: 'nothing'
        });        
    });
</script>

<asp:Panel ID="ControlPanel" runat="server">
    <asp:Panel ID="Inputs" runat="server">
        <asp:Panel CssClass="DateInputWrapper" runat="server">
            <asp:Panel CssClass="BeginDateInput" runat="server">
                <asp:Label Text="Begin Date: "  runat="server" />   
                <asp:TextBox ID="BeginDate" Columns="14" runat="server"></asp:TextBox>     
                <asp:Image ID="BeginDateImg" ImageUrl="/_layouts/Images/calendar.gif" runat="server" />
                <ajax:CalendarExtender ID="BeginDateExtender" TargetControlID="BeginDate" PopupButtonID="BeginDateImg" 
                                       Format="MMMM d, yyyy" runat="server">
                </ajax:CalendarExtender>
                <asp:Label Text="Begin Time: " runat="server" />
                <asp:TextBox ID="BeginTime" Columns="6" Text="04:00 am" runat="server"></asp:TextBox>
                <asp:Image ID="BeginTimeTrigger" runat="server" ImageUrl="/_layouts/1033/Images/clock.png" />                        
            </asp:Panel>                    
            <asp:Panel CssClass="EndDateInput" runat="server">
                <asp:Label Text="End Date: " runat="server" />                        
                <asp:TextBox ID="EndDate" Columns="14" runat="server"></asp:TextBox>     
                <asp:Image ID="EndDateImg" ImageUrl="/_layouts/Images/calendar.gif" runat="server" />
                <ajax:CalendarExtender ID="EndDateExtender" TargetControlID="EndDate" PopupButtonID="EndDateImg" 
                                       Format="MMMM d, yyyy" runat="server">
                </ajax:CalendarExtender>
                <asp:Label Text="End Time: " runat="server" />
                <asp:TextBox ID="EndTime" Columns="6" Text="03:59 am" runat="server"></asp:TextBox>
                <asp:Image ID="EndTimeTrigger" runat="server" ImageUrl="/_layouts/1033/Images/clock.png" />
            </asp:Panel>   
        </asp:Panel>         
        <asp:Panel CssClass="Submit" runat="server">
            <asp:Button ID="SearchButton" Text="Search" runat="server" />
            <asp:Label CssClass="SearchStatusText" runat="server" />
        </asp:Panel>       
    </asp:Panel>
</asp:Panel>

<asp:Panel ID="ResultsPanel" runat="server">
    <asp:ListView ID="ResultsList" runat="server">
        <LayoutTemplate>            
            <table id="discrepancy-results">
                <tr class="header-row">                    
                    <th>Scheduled Date/Time</th>                   
                    <th>Code</th>     
                    <th>Description</th>               
                </tr>                
                <asp:PlaceHolder runat="server" ID="itemPlaceHolder" />
            </table>            
        </LayoutTemplate>
        <ItemTemplate>
            <tr class="result-row">                
                <td><%# Eval("ScheduledDate") %></td>                
                <td><%# Eval("Code") %></td>         
                <td><%# Eval("Description") %></td>
            </tr>
        </ItemTemplate>
    </asp:ListView>
</asp:Panel>

<asp:Panel ID="DetailsPanel" runat="server">
</asp:Panel>
+3
4

, . , , quicksearch() . (), . !

0

, updatepanel , UpdatePanel ID typeof(UpdatePanel). startupscripts . :

ScriptManager.RegisterStartupScript(UpdatePanelId, typeof(UpdatePanel), "myScript",
                    / *
                      * Register a startup script to run 
                      * on the client after running this method on the server
                      * /
                    @" alert('Add your function to replace this.');", true);

, , , "" , , script , . , script .

+6

ScriptManager.RegisterStartupScript - . end_request UpdatePanel jQuery script:

// This could also be done in jQuery $(document).ready
function pageLoad() {
    Sys.WebForms
       .PageRequestManager
       .getInstance()
       .add_endRequest(endRequestHandler);
}

function endRequestHandler(sender, args) {
    // Shouldn't the next test be: 
    // $('table#discrepancy-results').length > 0 ???
    // and is it necessary at all? I suppose the quicksearch plugin
    // won't apply on empty array

    if ($('table#discrepancy-results').length) {
        $('table#discrepancy-results tr').quicksearch({
            position: 'before',
            attached: 'table.results',
            stripeRowClass: ['odd', 'even'],
            labelText: 'Keyword Search'
        });
    }
}
+4

ScriptManager.RegisterStartupScript , UniqueID. . , :

ScriptManager.RegisterStartupScript(Page, typeof(Page), UniqueID, scriptBlock, true);


ScriptManager.RegisterStartupScript(Page, typeof(Page), Guid.NewGuid(), scriptBlock, true);

or in any other way that you want to generate unique keys.

+1
source

Source: https://habr.com/ru/post/1721523/

More articles:


All Articles