Maintaining Scroll Position after sort

private int HScrollBarPos = 0;
        private bool HPosFLG = false;
        private void GetSBarPos(Emico.Common.UI.EmiDataGridView dg)
        {
            HPosFLG = false;
 
            foreach (Control c in dg.Controls)
            {
                if (c.GetType().Name == "HScrollBar")
                {
                    ScrollBar sBar = (ScrollBar)c;
                    HScrollBarPos = sBar.Value;
                    HPosFLG = true;
                }
            }
        }
 
        private void SetSBarPos(Emico.Common.UI.EmiDataGridView dg)
        {
            foreach (Control c in dg.Controls)
            {
                if (c.GetType().Name == "HScrollBar")
                {
                    if (HPosFLG)
                    {
                        dg.HorizontalScrollingOffset = HScrollBarPos;
                    }
                }
            }
        }
 
        private void emiDataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
 
            int aCol = emiDataGridView1.ActiveColumnIndex;
            int aRow = emiDataGridView1.ActiveRowIndex;
            emiDataGridView1.SuspendLayout();
 
 
            GetSBarPos(emiDataGridView1);
 
            // 行を移動させて、編集を確定させます。（EndEdit ではうまくいかない・・・）
            if (emiDataGridView1.CurrentCell != null && emiDataGridView1.CurrentCell.IsInEditMode == true)
            {
                if (emiDataGridView1.ActiveRowIndex == 0)
                {
                    if (emiDataGridView1.RowCount > 1)
                    {
                        if (emiDataGridView1.ActiveRowIndex != 0)
                        {
                            emiDataGridView1.ActiveRowIndex++;
                        }
                    }
                    else
                    {
                        if (emiDataGridView1.ActiveColumnIndex == 0)
                        {
                            emiDataGridView1.ActiveColumnIndex = 1;
                        }
                        else
                        {
                            emiDataGridView1.ActiveColumnIndex = 0;
                        }
                    }
                }
                //emiDataGridView1.CurrentCell = emiDataGridView1[0, 0];
            }
 
            string aColName = emiDataGridView1.Columns[e.ColumnIndex].Name;
 
            // 現在のソート順から新しいソート順を判定。
            SortOrder nowOrder = emiDataGridView1.Columns[e.ColumnIndex].HeaderCell.SortGlyphDirection;
            SortOrder newOrder;
            string strOrder;
            if (nowOrder == SortOrder.Ascending)
            {
                newOrder = SortOrder.Descending;
                strOrder = " DESC";
            }
            else
            {
                newOrder = SortOrder.Ascending;
                strOrder = " ASC";
            }
 
            // 列ヘッダーのグリフ（矢印）を、一旦クリア。
            emiDataGridView1.Columns["ColA"].HeaderCell.SortGlyphDirection = SortOrder.None;
            emiDataGridView1.Columns["ColB"].HeaderCell.SortGlyphDirection = SortOrder.None;
            emiDataGridView1.Columns["ColC"].HeaderCell.SortGlyphDirection = SortOrder.None;
 
            // ソート文字列を生成。
            StringBuilder sbSort = new StringBuilder();
            if (aColName.Length > 0)
            {
                sbSort.Append(aColName);
                sbSort.Append(strOrder);
            }
 
            // ソート。
            _tblTestclass.DefaultView.Sort = sbSort.ToString();
 
            // グリフ（矢印）を設定。
            if (aColName.Length > 0)
            {
                emiDataGridView1.Columns[aColName].HeaderCell.SortGlyphDirection = newOrder;
            }
 
            if (aCol >= 0 && aRow >= 0)
            {
                emiDataGridView1.CurrentCell = emiDataGridView1[e.ColumnIndex, 0];
            }
 
            SetSBarPos(emiDataGridView1);
            emiDataGridView1.Refresh();
            emiDataGridView1.ResumeLayout(); 
        }