Parent items are already expanded when coming back with new search list.

3 posts, 0 answers
  1. HelloWorld
    HelloWorld avatar
    14 posts
    Member since:
    Jun 2013

    Posted 04 Jun 2013 Link to this post


    When I expand the icon for a set of standards, leave the results expanded, and then do a second standard search for a different standard the results are already partially expanded which are supposed to be not expanded as noted in attached pictures.

    in code-hind

            /// <summary>
            /// Handler for the Search Button
            /// </summary>
            protected void SearchHandler(object sender, CriteriaController criteriaController)
                if (radTreeResults.Visible)
                    if (DtGrid == null) DoSearch();

    //DataView dv = new DataView(DtGrid, "ParentID is null", "", DataViewRowState.CurrentRows);                
                    //radTreeResults.DataSource = dv;
                    radTreeResults.DataSource = DtGrid;
                    radTreeResults.Visible = true;
            protected void TreeListDataSourceNeeded(object sender, EventArgs e)
                if (DtGrid == null) DoSearch(); 
                radTreeResults.DataSource = DtGrid;
            protected void radTreeResults_ItemDataBound(object sender, TreeListItemDataBoundEventArgs e)
                if (e.Item is TreeListDataItem)
                    TreeListDataItem item = e.Item as TreeListDataItem;
                    item.FindControl("lnkExpandAll").Visible = item.CanExpand;
                    item.FindControl("lnkCollapseAll").Visible = item.CanExpand;
                    if (item.Expanded)
                        item.FindControl("lnkCollapseAll").Visible = item.Expanded;
                        item.FindControl("lnkExpandAll").Visible = false;

            protected void radTreeResults_ItemCommand(object sender, TreeListCommandEventArgs e)
                if (e.CommandName == RadTreeList.ExpandCollapseCommandName)
                    if ((e.Item as TreeListDataItem).HierarchyIndex.NestedLevel == 0 && e.CommandArgument.ToString() == "ExpandAll")
                        e.Canceled = true;
                        if (!(e.Item as TreeListDataItem).Expanded)
                            radTreeResults.ExpandItemToLevel((e.Item as TreeListDataItem), 10);

    in .aspx

     <telerik:RadTreeList ID="radTreeResults" runat="server" ParentDataKeyNames="ParentID" Visible="False"
                DataKeyNames="StandardID" Skin="Office2010Silver"  Width="100%" Height="100%"
                AutoGenerateColumns="False" OnNeedDataSource="TreeListDataSourceNeeded" 
                OnItemCommand="radTreeResults_ItemCommand" OnItemDataBound="radTreeResults_ItemDataBound" ShowTreeLines="false">
                <ClientSettings Scrolling-AllowScroll="true" Scrolling-UseStaticHeaders="true">
                    <Resizing ResizeMode="AllowScroll" AllowColumnResize="true" EnableRealTimeResize="true" />
                    <Scrolling AllowScroll="true" UseStaticHeaders="true" SaveScrollPosition="true" ScrollHeight="560px" />
                    <ClientEvents OnTreeListCreated="TreeListCreated" />
                    <telerik:TreeListSelectColumn HeaderStyle-Width="40px" UniqueName="SelectColumn">
                    <telerik:TreeListTemplateColumn HeaderStyle-Width="120px" DataField="NameDisplayText"
                        UniqueName="NameDisplayText" HeaderText="Name" >
                            <asp:LinkButton ID="lnkExpandAll" runat="server" CommandName="ExpandCollapse"
                                CommandArgument="ExpandAll" Text="+" Visible="true"></asp:LinkButton>
                            <asp:LinkButton ID="lnkCollapseAll" runat="server" CommandName="ExpandCollapse"
                                CommandArgument="CollapseAll" Text="-" Visible="false"></asp:LinkButton>
                            <asp:HyperLink ID="lnkStandardName" runat="server" Target="_blank" NavigateUrl='<%#"~/Record/StandardsPage.aspx?xID=" + Eval("EncryptedID") %>'
                                Visible="True" Style="color: Blue;" StandardID='<%# Eval("EncryptedID") %>' StandardName='<%# Eval("StandardName") %>' ><%# Eval("NameDisplayText")%></asp:HyperLink>                        
                    <telerik:TreeListBoundColumn HeaderStyle-Width="300px" DataField="StandardText" UniqueName="StandardText"
                        HeaderText="Text" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="45px" DataField="Grade" UniqueName="Grade"
                        HeaderText="Grade" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="100px" DataField="Subject" UniqueName="Subject"
                        HeaderText="Subject" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="100px" DataField="Course" UniqueName="Course"
                        HeaderText="Course" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="100px" DataField="Level" UniqueName="Level"
                        HeaderText="Level" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="50px" DataField="ItemCount" UniqueName="ItemCount"
                        HeaderText="Items" />
                    <telerik:TreeListBoundColumn HeaderStyle-Width="75px" DataField="ResourceCount" UniqueName="ResourceCount"
                        HeaderText="Resources" />
  2. Kostadin
    Kostadin avatar
    1733 posts

    Posted 07 Jun 2013 Link to this post

    Hi Charlie,

    I am afraid I was not able to understand the issue completely from the provided information and images. As far as I can see the TreeList is expanded in both images but populated with a different data. Are you trying to collapse all item after the second search? Additionally I examined the provided code and I wasn't able to find anything unusual. Could you please elaborate a little bit more on your scenario?

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  3. Robin
    Robin avatar
    10 posts
    Member since:
    May 2011

    Posted 15 Jul 2013 Link to this post

    I'm facing the same issue.

    E.g.: In the first load, you have following rows displayed #1, 2, 3, 4, 5

    You try to expand row #1, #2.

    You also have a custom search and the search return 2, 3, 5.

    In the result of the search, the #2, #3 will be expanded.

    It seems that the TreeList preserve the expand/collapse state of each row in viewstate and auto-reload it during postback.

    Perhaps, you should do TreeList1.CollapseAllItems(); when the Search is performed.
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