Asp.net GridView转换成DataTable

GridView绑定DataTable后，如何获取GridView绑定后显示的值，在项目需求需要的背景下，搜索了获取单元格显示文本的方法，然后写了一个静态方法，经过在项目中的使用，bug的修复，较为稳定。

  #region ================GridView转DataTable方法================
         /// <param name="gv">已绑定数据源的GridView</param>
         /// <param name="showHideColumn">是否显示隐藏列</param>
         /// <returns>DataTable</returns>
         public static DataTable GridViewToDataTable(GridView gv, Boolean showHideColumn)
         {
             //处理后的数据表
             DataTable dt = new DataTable();

             //记录符合条件索引
             int[] columnIndexs = new int[gv.HeaderRow.Cells.Count];
             //记录指示器从0开始
             int columnIndexsCount = ;

             //初始化dt列名
             for (int i = ; i < gv.HeaderRow.Cells.Count; i++)
             {
                 //获取列名
                 string columnName = GetCellText(gv.HeaderRow.Cells[i]);
                 //string columnName = gv.HeaderRow.Cells[i].Text;

                 //列名非空//且可见
                 if (!string.IsNullOrEmpty(columnName))
                 {
                     //是否显示隐藏列
                     if (gv.HeaderRow.Cells[i].Visible || showHideColumn)
                     {
                         //列名不允许重复
                         if (!dt.Columns.Contains(columnName))
                         {
                             //dt中新增一列
                             DataColumn dc = dt.Columns.Add();
                             //列名
                             dc.ColumnName = columnName;
                             //存储的数据类型
                             dc.DataType = typeof(string);

                             //记录符合条件的列索引
                             columnIndexs[columnIndexsCount] = i;
                             //记录指示器+1
                             columnIndexsCount++;
                         }
                     }
                 }
             }

             //GridView行复制到数组中便于操作
             GridViewRow[] allGridViewRow = new GridViewRow[gv.Rows.Count];
             gv.Rows.CopyTo(allGridViewRow, );

             //数据添加到dt中
             foreach (GridViewRow row in allGridViewRow)
             {
                 //创建一行
                 DataRow dr = dt.NewRow();
                 //符合条件的列
                 for (int i = ; i < columnIndexsCount; i++)
                 {
                     //获取显示文本并保存
                     dr[i] = GetCellText(row.Cells[columnIndexs[i]]);
                 }
                 //dt中增加此行
                 dt.Rows.Add(dr);
             }
             //返回处理后的数据
             return dt;
         }

         /// <param name="gv">未绑定数据源的GridView</param>
         /// <param name="dtSource">GridView的数据源</param>
         /// <param name="showHideColumn">是否显示隐藏列</param>
         /// <returns>DataTable</returns>
         public static DataTable GridViewToDataTable(GridView gv, DataTable dtSource, Boolean showHideColumn)
         {
             //绑定原始数据到GridView
             gv.DataSource = dtSource;
             gv.DataBind();
             //设置为不分页
             gv.AllowPaging = false;
             //GridView转DataTable并返回
             return GridViewToDataTable(gv, showHideColumn);
         }
         #endregion

         #region ================私有工具方法================
         /// <param name="cell">TableCell</param>
         /// <returns>string</returns>
         private static string GetCellText(TableCell cell)
         {
             string cellText = cell.Text;
             //常规文本（无控件）直接返回
             if (!string.IsNullOrEmpty(cellText))
             {
                 //返回显示文本
                 return cellText.Replace(" ", "");
             }
             //遍历cell中的控件
             foreach (Control control in cell.Controls)
             {
                 if (control != null && control is IButtonControl)
                 {
                     IButtonControl btn = control as IButtonControl;
                     cellText += btn.Text.Replace("\r\n", "").Trim();
                     continue;
                 }
                 if (control != null && control is ITextControl)
                 {
                     LiteralControl lc = control as LiteralControl;
                     if (lc != null)
                     {
                         //跳出到下一步foreach
                         continue;
                     }
                     ITextControl l = control as ITextControl;

                     cellText += l.Text.Replace("\r\n", "").Trim();
                     continue;
                 }
             }
             //返回显示文本
             return cellText;
         }
         #endregion

   #region ================另一种方法================
         public static DataTable GetGridDataTable(GridView grid)
         {
             DataTable dt = new DataTable();
             DataColumn dc;//创建列
             DataRow dr;       //创建行
             //构造列
             for (int i = ; i < grid.Columns.Count; i++)
             {
                 dc = new DataColumn();
                 dc.ColumnName = grid.Columns[i].HeaderText;
                 dt.Columns.Add(dc);
             }
             //构造行
             for (int i = ; i < grid.Rows.Count; i++)
             {
                 dr = dt.NewRow();
                 for (int j = ; j < grid.Columns.Count; j++)
                 {
                     dr[j] = grid.Rows[i].Cells[j].Text;
                 }
                 dt.Rows.Add(dr);
             }

             return dt;
         }
         #endregion