ListView DataPager issue

Question

Hello Everyone,

I am using a Listview and a DataPager. The DataPager is configured like this:

        <asp:DataPager ID="DataPager" PageSize="20" class="btn-group btn-group-sm" runat="server">           
            <Fields>                  
                <asp:NextPreviousPagerField  PreviousPageText="<" FirstPageText="<<" ShowPreviousPageButton="true"
                    ShowFirstPageButton="true" ShowNextPageButton="false" ShowLastPageButton="false"
                    ButtonCssClass="btn btn-default" RenderNonBreakingSpacesBetweenControls="false" RenderDisabledButtonsAsLabels="false" />
                <asp:NumericPagerField ButtonType="Link" CurrentPageLabelCssClass="btn btn-default grey-gallery disabled"  RenderNonBreakingSpacesBetweenControls="false"
                    NumericButtonCssClass="btn btn-default" ButtonCount="4" PreviousPageText="..." NextPageText="..." NextPreviousButtonCssClass="btn btn-default" />
                <asp:NextPreviousPagerField NextPageText=">" LastPageText=">>" ShowNextPageButton="true"
                    ShowLastPageButton="true" ShowPreviousPageButton="false" ShowFirstPageButton="false"
                    ButtonCssClass="btn btn-default" RenderNonBreakingSpacesBetweenControls="false" RenderDisabledButtonsAsLabels="false"/>
            </Fields>
        </asp:DataPager>

Everything works fine but this. If i have 15 pages for example... i see blocks of navigation like this

<< < 1 2 3 4 ...> >>
<< < ... 5 6 7 8 ...> >>
<< < ... 9 10 11 12 ...> >>
<< < ... 13 14 15 > >>

When i clic the "..." button after numer 12, that should load last block of page navigation... it does not. But if I hit the ">" it does load. When debugging, i get the same value for e.StartRowIndex when hitting "..." or ">"

        Private Sub Listado_PagePropertiesChanging(sender As Object, e As PagePropertiesChangingEventArgs) Handles Listado.PagePropertiesChanging
            Try
                Paginacion.SetPageProperties(e.StartRowIndex, e.MaximumRows, False)
                DataBindListView()
            Catch ex As Exception
                Throw
            End Try
        End Sub

So it is very weird, starting to think that it is a control bug. Have anyone deal with this?

Answer 1

Hi @Federico R ,

According to the code you provided, you did not set the PagedControlID. When the PagedControlID is set, the problem you mentioned will not occur.

1. <asp:DataPager ID="DataPager" PageSize="20" class="btn-group btn-group-sm" runat="server" OnPreRender="Page_Load" PagedControlID="TestListView" >
2. <asp:ListView ID="TestListView"

Here is an example, you can refer to it.

Page:

• You can click this link to download the file to view the code.

xxx.aspx.cs

Public Partial Class _Default  
    Inherits Page  
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)  
        TestListView.DataSource = testdata()  
        TestListView.DataBind()  
    End Sub  
  
    Public Function testdata() As DataTable  
        Dim table As DataTable = New DataTable()  
        Dim column As DataColumn  
        Dim row As DataRow  
        table.Columns.Add(New DataColumn With {  
            .DataType = Type.[GetType]("System.String"),  
            .ColumnName = "TestId"  
        })  
        table.Columns.Add(New DataColumn With {  
            .DataType = Type.[GetType]("System.String"),  
            .ColumnName = "TestName"  
        })  
  
        For i As Integer = 1 To 500 - 1  
            row = table.NewRow()  
            row("TestId") = i.ToString()  
            row("TestName") = "TestName" & i.ToString()  
            table.Rows.Add(row)  
        Next  
  
        Return table  
    End Function  
End Class  

Result

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YihuiSun