<toolkit:DataGrid VirtualizingStackPanel.VirtualizationMode="Recycling"

                                      VirtualizingStackPanel.IsVirtualizing="True"

                                      EnableColumnVirtualization="True"

                                      EnableRowVirtualization="True"

                                      RowHeight="23"

                                      ColumnWidth="100"

                                      ScrollViewer.HorizontalScrollBarVisibility="Visible"

                                      ScrollViewer.VerticalScrollBarVisibility="Visible"

                                      Name="DgdData" Grid.Row="0" AutoGenerateColumns="True" DataContext="{Binding DataTableSource}" ItemsSource="{Binding}" />
                    

 private void BtnFirstPage_Click(object sender, RoutedEventArgs e)

        {

            this.mData.DataPageNum = ;

            this.SetDisData(this.mData.DataPageNum, this.mData.DataPageSize);

        }

        private void BtnPrevPage_Click(object sender, RoutedEventArgs e)

        {

            this.mData.DataPageNum--;

            this.mData.DataPageNum = this.mData.DataPageNum >  ? this.mData.DataPageNum : ;

            this.SetDisData(this.mData.DataPageNum, this.mData.DataPageSize);

        }

        private void BtnNextPage_Click(object sender, RoutedEventArgs e)

        {

            int maxPageNum = (int)Math.Ceiling((double)this.mData.Times.Count / (double)this.mData.DataPageSize);

            this.mData.DataPageNum++;

            this.mData.DataPageNum = this.mData.DataPageNum > maxPageNum ? maxPageNum : this.mData.DataPageNum;

            this.SetDisData(this.mData.DataPageNum, this.mData.DataPageSize);

        }

        private void BtnLastPage_Click(object sender, RoutedEventArgs e)

        {

            int maxPageNum = (int)Math.Ceiling((double)this.mData.Times.Count / (double)this.mData.DataPageSize);

            this.mData.DataPageNum = maxPageNum;

            this.SetDisData(this.mData.DataPageNum, this.mData.DataPageSize);

        }

        private void SetDisData(int pageNum, int pageSize)

        {

            DataRow row;

            int startRow = (pageNum - ) * pageSize;

            int endRow = startRow + pageSize;

            endRow = this.mData.Times.Count > endRow ? endRow : this.mData.Times.Count;

            this.mDtData.Rows.Clear();

            CollectionViewSource itemCollectionViewSource2 = new CollectionViewSource();

            itemCollectionViewSource2.Source = this.mDtData;

            DgdData.DataContext = itemCollectionViewSource2;

        }