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Tab in TabStrip renders only once

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TabStrip
This is a migrated thread and some comments may be shown as answers.
Alexander Tokarenko
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Alexander Tokarenko asked on 20 May 2015, 07:49 AM

Hello. I have a problem. I created Layout by splitters and put the Tabstrip into the central area. In TabStrip I creates 2 tabs. In one tab I put PageView with UserControl and the second tab is empty UserControl. When page is loaded in first tab I see my UserControl. But after switch into the second tab and return into first I see an empty tab. The code is following.

Default.aspx:

 

<style type=css
html, body, form 
   height: 100%; 
   margin: 0px; 
   padding: 0px; 
</style>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<%@ Register Src="~/ChartUC.ascx" TagPrefix="uc1" TagName="Chart" %>
 
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<head runat="server">
    <title></title>
    <telerik:RadStyleSheetManager id="RadStyleSheetManager1" runat="server" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        <Scripts>
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
            <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />
        </Scripts>
    </telerik:RadScriptManager>
    <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
        <script type="text/javascript">
         /* <![CDATA[ */
         function onTabSelecting(sender, args) {
             var tab = args.get_tab();
             if (tab.get_pageView())
             {
                 tab.set_postBack(false);
             }
         }
        /* ]]> */
        </script>
    </telerik:RadCodeBlock>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" EnablePageHeadUpdate="true">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadTabStrip1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadTabStrip1"></telerik:AjaxUpdatedControl>
                    <telerik:AjaxUpdatedControl ControlID="RadMultiPage1" LoadingPanelID="LoadingPanel1"></telerik:AjaxUpdatedControl>
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting AjaxControlID="RadMultiPage1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadMultiPage1"></telerik:AjaxUpdatedControl>
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <div>
        <telerik:RadSplitter ID="RadSplitter1" runat="server" Height="100%" LiveResize="true" Width="100%">
            <telerik:RadPane ID="navigationPane" runat="server" Width="25%" Height="100%">
                <p>Left</p>
            </telerik:RadPane>
            <telerik:RadSplitBar ID="RadSplitbar1" runat="server" CollapseMode="Forward" Height="100%">
            </telerik:RadSplitBar>
            <telerik:RadPane ID="contentPane" runat="server" Width="75%" Height="100%">
                <telerik:RadSplitter ID="RadSplitter2" runat="server" Orientation="Horizontal" Height="70%" LiveResize="true">
                    <telerik:RadPane ID="topPane" runat="server">
                         
                        <telerik:RadTabStrip ID="RadTabStrip1" runat="server" Skin="Glow" MultiPageID="RadMultiPage1"
                            Width="100%" SelectedIndex="0" OnTabClick="RadTabStrip1_TabClick" ClickSelectedTab="True"
                            OnClientTabSelecting="onTabSelecting" Align="Justify">
                        </telerik:RadTabStrip>
 
                        <telerik:RadMultiPage runat="server" ID="RadMultiPage1" SelectedIndex="0" RenderSelectedPageOnly="true"
                            OnPageViewCreated="RadMultiPage1_PageViewCreated" CssClass="RadMultiPage">
                        </telerik:RadMultiPage>
 
                    </telerik:RadPane>
                    <telerik:RadSplitBar ID="RadSplitbar2" runat="server" CollapseMode="Backward"/>
                    <telerik:RadPane ID="bottomPane" runat="server" Height="30%">
                         Nested Splitter Bottom Content
                    </telerik:RadPane>
                </telerik:RadSplitter>
            </telerik:RadPane>
        </telerik:RadSplitter>
    </div>
    </form>
</body>
</html>

Default.aspx.cs

 

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
using System.Data;
using System.Configuration;
using System.Web.Security;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Telerik.Web.UI;
 
public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            AddTab("Диаграмма Парето", "ChartUC");
            AddPageView(RadTabStrip1.FindTabByText("Диаграмма Парето"));
            AddTab("Таблица", "GridUC");
        }
    }
    protected void RadTabStrip1_TabClick(object sender, RadTabStripEventArgs e)
    {
        AddPageView(e.Tab);
        e.Tab.PageView.Selected = true;
    }
    protected void RadMultiPage1_PageViewCreated(object sender, RadMultiPageEventArgs e)
    {
        string userControlName = e.PageView.ID + ".ascx";
        Control userControl = Page.LoadControl(userControlName);
        userControl.ID = e.PageView.ID + "_userControl";
        e.PageView.Controls.Add(userControl);
    }
    private void AddPageView(RadTab tab)
    {
        RadPageView pageView = new RadPageView();
        pageView.ID = tab.PageViewID;
        RadMultiPage1.PageViews.Add(pageView);
        tab.PageViewID = pageView.ID;
    }
    private void AddTab(string tabName, string sId)
    {
        RadTab tab = new RadTab();
        tab.Text = tabName;
        tab.PageViewID = sId;
        tab.Width = Unit.Percentage(100);
        RadTabStrip1.Tabs.Add(tab);
    }
}

ChartUC.ascx

 

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ChartUC.ascx.cs" Inherits="ChartUC" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<div class="contentWrapper">
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" UpdateInitiatorPanelsOnly="true" OnAjaxRequest="RadAjaxManager1_AjaxRequest">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadAjaxManager1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="gridLoadingPanel"></telerik:AjaxUpdatedControl>
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting AjaxControlID="RadGrid1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />
                </UpdatedControls>
        </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <telerik:RadCodeBlock ID="RadCodeBlock2" runat="server">
        <script type="text/javascript">
            function SeriesClicked(e) {
                if (e.originalEvent.type === "contextmenu") {
                    // Disable browser context menu
                    e.originalEvent.preventDefault();
                    return;
                }
                var ajaxManager = $find("<%= RadAjaxManager1.ClientID %>");
                ajaxManager.ajaxRequest('Chart1SC' + '$' + e.series.index + '$' + e.point.categoryIx);
            }
        </script>
    </telerik:RadCodeBlock>
    <div style="width: 700px; height: 500px; float: left;">
        <telerik:RadHtmlChart runat="server" ID="m_ParetoChart" Height="400" Width="600">
            <ChartTitle Text="Дефекты ППМ. Диаграмма Парето">
            </ChartTitle>
            <ClientEvents OnSeriesClick="SeriesClicked" />
            <PlotArea>
                <Series>
                    <telerik:ColumnSeries Name="Дефекты">
                        <TooltipsAppearance Color="White" />
                    </telerik:ColumnSeries>
                    <telerik:LineSeries Name="Проценты">
                        <TooltipsAppearance Color="White" />
                    </telerik:LineSeries>
                </Series>
                <YAxis Width="3">
                    <TitleAppearance Text="Количество">
                        <TextStyle Color="Black" />
                    </TitleAppearance>
                    <LabelsAppearance>
                        <TextStyle Color="Black" />
                    </LabelsAppearance>
                </YAxis>
                    <AdditionalYAxes>
                    <telerik:AxisY Name="AdditionalAxis" Color="Black" Width="3" MaxValue="1.2">
                        <TitleAppearance Text="Проценты">
                            <TextStyle Color="Black" />
                        </TitleAppearance>
                        <LabelsAppearance>
                            <TextStyle Color="Black" />
                        </LabelsAppearance>
                        <LabelsAppearance DataFormatString="P" />
                    </telerik:AxisY>
                </AdditionalYAxes>
                <XAxis>
                    <TitleAppearance Text="Дефекты">
                        <TextStyle Color="Black" />
                    </TitleAppearance>
                    <LabelsAppearance>
                        <TextStyle Color="Black" />
                    </LabelsAppearance>
                    <AxisCrossingPoints>
                        <telerik:AxisCrossingPoint Value="0" />
                        <telerik:AxisCrossingPoint Value="9" />
                    </AxisCrossingPoints>
                </XAxis>
            </PlotArea>
            <Legend>
                <Appearance BackgroundColor="White" Position="Right" Visible="true" />
            </Legend>
        </telerik:RadHtmlChart>
    </div>
    <div style="width: 700px; height: 500px; float: left;">
        <h2>Дефекты ППМ. Таблица</h2>
        <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" AllowPaging="true"
            AllowSorting="true" AllowFilteringByColumn="true" GridLines="Both" PageSize="10"
            ClientSettings-Scrolling-AllowScroll="true"
            AllowCustomPaging="True" OnNeedDataSource="RadGrid1_NeedDataSource">
            <ClientSettings AllowKeyboardNavigation="True">
                <Scrolling AllowScroll="True" UseStaticHeaders="True" />
            </ClientSettings>
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn HeaderText="Вид дефектов на печатной плате" DataType="System.String"
                        DataField="CategoryID"/>
                    <telerik:GridBoundColumn HeaderText="Процент от общего числа дефектов" DataType="System.Double"
                        DataField="Percents"/>
                    <telerik:GridBoundColumn HeaderText="Дата обнаружения" DataType="System.DateTime"
                        DataField="Date"/>
                    <telerik:GridBoundColumn HeaderText="Контроллер" DataType="System.String"
                        DataField="Checker"/>
                </Columns>
            </MasterTableView>
        </telerik:RadGrid>
    </div>
</div>

Chart.ascx.cs

 

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Linq;
using Telerik.Web.UI;
 
public partial class ChartUC : System.Web.UI.UserControl
{
    public ChartUC()
    {
        m_SelectedSeries.SeriesIdx = -1;
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            PopulateChart2();
        }
    }
    public struct SelectedSeries
    {
        public int SeriesIdx;
        public int ItemIdx;
    }
    private SelectedSeries m_SelectedSeries;
    protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
    {
        if (m_SelectedSeries.SeriesIdx == -1)
        {
            int startRowIndex = RadGrid1.CurrentPageIndex * RadGrid1.PageSize;
            int maximumRows = RadGrid1.PageSize;
            DataTable dt = PopulateGrid2(false);
            var v = dt.AsEnumerable().Skip(startRowIndex).Take(maximumRows);
            RadGrid1.DataSource = v.Any() ? v.CopyToDataTable() : dt.Clone();
        }
        else
        {
            DataTable dt = PopulateGrid2(false);
            var grps = dt.AsEnumerable().GroupBy(a => a.Field<string>("CategoryID")).OrderByDescending(b => b.Count());
            //var v = m_SelectedSeries.ItemIdx == 0 ? grps.Take(1) : grps.Skip(m_SelectedSeries.ItemIdx - 1).Take(1);
            var v = grps.Skip(m_SelectedSeries.ItemIdx).Take(1);
            var dt_ = v.First().CopyToDataTable();
            RadGrid1.VirtualItemCount = dt_.Rows.Count;
            RadGrid1.DataSource = dt_;
        }
    }
    private void PopulateChart2()
    {
        DataTable dt = PopulateGrid2(false);
        var grps = dt.AsEnumerable().GroupBy(a => a.Field<string>("CategoryID")).OrderByDescending(b => b.Count());
        RadHtmlChart chart = m_ParetoChart;
        var colSeries = chart.PlotArea.Series[0] as ColumnSeries;
        decimal sum = 0;
 
        foreach (var grp in grps)
        {
            //string sName = grp.Key;
            decimal ct = grp.Count();
            sum += ct;
            var csi = new CategorySeriesItem(ct);
            colSeries.SeriesItems.Add(csi);
        }
        //colSeries.TooltipsAppearance.ClientTemplate = "#=dataItem." + tooltipColumn + "#";
        var weights = new List<decimal>();
        foreach (var grp in grps)
        {
            decimal ct = grp.Count();
            weights.Add(ct / sum * 100);
        }
        var lineSeries = chart.PlotArea.Series[1] as LineSeries;
        decimal weight = 0;
        foreach (var val in weights)
        {
            weight += val;
            if (weight > 100) weight = 100;
            var v = Math.Round(weight);
            var csi = new CategorySeriesItem(v);
            lineSeries.SeriesItems.Add(csi);
        }
 
    }
    private DataTable PopulateGrid(bool a_bSetDataSource = true)
    {
        DataTable dt = new DataTable();
        DataColumn col = new DataColumn("CategoryID", typeof(string));
        dt.Columns.Add(col);
        col = new DataColumn("Percents", typeof(double));
        dt.Columns.Add(col);
        col = new DataColumn("Date", typeof(DateTime));
        dt.Columns.Add(col);
        col = new DataColumn("Checker", typeof(string));
        dt.Columns.Add(col);
        DataRow row = dt.NewRow();
        row["CategoryID"] = "Недостаток припоя";
        row["Percents"] = 60;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Трещины";
        row["Percents"] = 10;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Царапины";
        row["Percents"] = 10;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Пятна припоя";
        row["Percents"] = 5;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Тепловая деформация";
        row["Percents"] = 5;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Расслоение платы";
        row["Percents"] = 7;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        row = dt.NewRow();
        row["CategoryID"] = "Прочее";
        row["Percents"] = 3;
        row["Date"] = DateTime.Now;
        row["Checker"] = "Иванов И. И.";
        dt.Rows.Add(row);
        if (a_bSetDataSource)
        {
            RadGrid1.DataSource = dt;
            RadGrid1.DataBind();
        }
        return dt;
    }
 
    private DataTable PopulateGrid2(bool a_bSetDataSource = true)
    {
        DataTable dt = new DataTable();
        DataColumn col = new DataColumn("CategoryID", typeof(string));
        dt.Columns.Add(col);
        col = new DataColumn("Percents", typeof(double));
        dt.Columns.Add(col);
        col = new DataColumn("Date", typeof(DateTime));
        dt.Columns.Add(col);
        col = new DataColumn("Checker", typeof(string));
        dt.Columns.Add(col);
 
        var xd = XDocument.Load("D:/Work/ASP.Net/telerikt1/SimpleChart/bin/defects.xml");
        foreach (XElement xe in xd.Root.Elements())
        {
            var dr = dt.NewRow();
            dr["CategoryID"] = xe.Attribute("Type").Value;
            dr["Percents"] = 0;
            dr["Date"] = DateTime.Parse(xe.Attribute("Date").Value);
            dr["Checker"] = xe.Attribute("Checker").Value; ;
            dt.Rows.Add(dr);
        }
        RadGrid1.VirtualItemCount = dt.Rows.Count;
        if (a_bSetDataSource)
        {
            RadGrid1.DataSource = dt;
            RadGrid1.DataBind();
        }
        return dt;
    }
    public void RadAjaxManager1_AjaxRequest(object sender, AjaxRequestEventArgs e)
    {
        string[] a = e.Argument.Split('$');
        if (a[0] == "Chart1SC")
        {
            m_SelectedSeries.SeriesIdx = int.Parse(a[1]);
            m_SelectedSeries.ItemIdx = int.Parse(a[2]);
            RadGrid1.Rebind();
        }
    }
}

GridUC.ascx

 

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="GridUC.ascx.cs" Inherits="GridUC" %>

GridUC.ascx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
public partial class GridUC : System.Web.UI.UserControl
{
    public GridUC()
    {
 
    }
    protected void Page_Load(object sender, EventArgs e)
    {
 
    }
}

 

 

1 Answer, 1 is accepted

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Nencho
Telerik team
answered on 25 May 2015, 07:46 AM
Hello Alexander,

The reason for the experienced behavior is the RenderSelectedPageOnly setting that you had set to true for the RadMultiPage. In such a manner, you push the RadMultiPage to render only one PageView at a time, which is in contradiction with the logic in OnClientTabSelecting client-side event, which aims to set as selected the PageView, which is already added in the PageViews collection and already associated with the tab which is about to be selected.

I would suggest you to remove this setting, in order to achieve the proper behavior.

Regards,
Nencho
Telerik
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TabStrip
Asked by
Alexander Tokarenko
Top achievements
Rank 1
Answers by
Nencho
Telerik team
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