Advanced binding with Datapager Problem

[Ayberk]

I am using Advanced databinding method. When yapAfter button is clicked I add an item to my List stored in the session according to the specific index and I rebind my List. Also in NeedData Source event my List stored in the session is binded. There is no problem when Allowpaging is off in Listview. However when I turn on Allowpaging the items I added last to my List comes out at the beginning of the List. They are not listed according to the Index I assigned while adding.  

Thanks,
Regards.

<telerik:RadListView ID="RadListView1" runat="server" ItemPlaceholderID="ProductsHolder"
            OnNeedDataSource="RadListView1_NeedDataSource" OnItemDataBound="RadListView1_ItemDataBound"
            OnItemCommand="RadListView1_ItemCommand" DataKeyNames="RID">
            <LayoutTemplate>
                <asp:Panel ID="ProductsHolder" runat="server" />
                <telerik:RadDataPager ID="RadDataPager1" runat="server" PagedControlID="RadListView1"
                    PageSize="50" AllowSEOPaging="False" AllowRouting="False">
                    <Fields>
                        <telerik:RadDataPagerButtonField FieldType="FirstPrev" />
                        <telerik:RadDataPagerButtonField FieldType="Numeric" />
                        <telerik:RadDataPagerButtonField FieldType="NextLast" />
                        <telerik:RadDataPagerPageSizeField PageSizeText="Page size: " />
                        <telerik:RadDataPagerGoToPageField CurrentPageText="Page: " TotalPageText="of" SubmitButtonText="Go"
                            TextBoxWidth="15" />
                        <telerik:RadDataPagerTemplatePageField>
                            <PagerTemplate>
                                <div style="float: right">
                                    <b>Items
                                        <asp:Label runat="server" ID="CurrentPageLabel" Text="<%# Container.Owner.StartRowIndex+1%>" />
                                        to
                                        <asp:Label runat="server" ID="TotalPagesLabel" Text="<%# Container.Owner.TotalRowCount > (Container.Owner.StartRowIndex+Container.Owner.PageSize) ? Container.Owner.StartRowIndex+Container.Owner.PageSize : Container.Owner.TotalRowCount %>" />
                                        of
                                        <asp:Label runat="server" ID="TotalItemsLabel" Text="<%# Container.Owner.TotalRowCount%>" />
                                        <br />
                                    </b>
                                </div>
                            </PagerTemplate>
                        </telerik:RadDataPagerTemplatePageField>
                    </Fields>
                </telerik:RadDataPager>
            </LayoutTemplate>
            <ItemTemplate>
                <div id="segment<%#Eval("RID") %>" class="segment">
                    <table>
                        <tr>
                            <td style="width: 50px">
                                <telerik:RadButton ID="RadButton1" runat="server" Text="X" CommandName="deleteSegment">
                                </telerik:RadButton>
                                <input name="Button11" type="button" onclick="javascript:deleteSegment('#segment<%#Eval("RID") %>');"
                                    value="X" />
                            </td>
                            <td style="width: 100%">
                                <textarea id="sourceTextarea" name="sourceTextarea" style="width: 98%"><%#Eval("Segment") %></textarea>
                            </td>
                        </tr>
                        <tr>
                            <td>

                            </td>
                            <td>
                                <telerik:RadButton ID="RadButton2" runat="server" Text="+" CommandName="yapAfter">
                                </telerik:RadButton>
                                <input name="Button11" type="button" onclick="javascript:yapAfter_source('#segment<%#Eval("RID") %>');"
                                    value="+" />
                                <input name="Button11" type="button" onclick="javascript:splitSegment('#segment<%#Eval("RID") %>');"
                                    value="-/-" />
                                <input name="Button11" type="button" onclick="javascript:segmentMerge('#segment<%#Eval("RID") %>');"
                                    value=">|<" />
                            </td>
                        </tr>
                    </table>
                </div>
            </ItemTemplate>
        </telerik:RadListView>

protected void RadListView1_NeedDataSource(object sender, Telerik.Web.UI.RadListViewNeedDataSourceEventArgs e)
    {
        if (!IsPostBack)
        {
            if (String.IsNullOrEmpty(HiddenField1.Value))
                return;
            decimal m_ProjectRef = Convert.ToDecimal(HiddenField1.Value);
            List<prepdata> mList = new List<prepdata>();
            mList = PreprocessHelperDB.getDataSource(m_ProjectRef);
            Session["myList"] = mList;
            RadListView1.DataSource = mList;
        }
        else
        {
            List<prepdata> mList = (List<prepdata>)Session["myList"];
            RadListView1.DataSource = mList;
        }


    }

protected void RadListView1_ItemCommand(object sender, RadListViewCommandEventArgs e)
    {

if (String.Equals(e.CommandName, "yapAfter"))
        {
            decimal m_ProjectRef = Convert.ToDecimal(HiddenField1.Value);

            RadListViewDataItem dataItem = (RadListViewDataItem)e.ListViewItem;

            List<prepdata> mList = new List<prepdata>();
            mList = (List<prepdata>)Session["myList"];

            mList.Insert(0, new prepdata { Segment = "asdsadaAA index:" + 0});

            mList.Insert(1, new prepdata { Segment = "asdsadaAA:" + 1 });

            mList.Insert(5, new prepdata { Segment = "asdsadaAA:" + 5 });

            Session.Remove("myList");

            Session["myList"] = mList;

            RadListView1.Rebind();

        }
    }

[Pavlina]

Hi Ayberk,

Based on the provided information it is hard to determine what is the cause of the problem. Can you try preparing a sample project illustrating the problem and send it to us? For that purpose, you will need to open a formal support ticket where you would be able to attach a zipped version of the project.

Regards,
Pavlina
the Telerik team