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 = 0;
 
            //初始化dt列名
            for (int i = 0; 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, 0);
 
            //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 = 0; 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("
", "").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("
", "").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 = 0; i < grid.Columns.Count; i++)
            {
                dc = new DataColumn();
                dc.ColumnName = grid.Columns[i].HeaderText;
                dt.Columns.Add(dc);
            }
            //构造行 
            for (int i = 0; i < grid.Rows.Count; i++)
            {
                dr = dt.NewRow();
                for (int j = 0; j < grid.Columns.Count; j++)
                {
                    dr[j] = grid.Rows[i].Cells[j].Text;
                }
                dt.Rows.Add(dr);
            }

            return dt;
        }
        #endregion