DataGrid代码（一）

using System;
using System.Collections;
using System.Data;
using System.Web.UI.WebControls;

namespace My.Utils {
    /// <summary>
    /// DataGrid工具集
    /// </summary>
    public class DataGridUtils {
        public DataGridUtils() {
        }

        /// <summary>
        /// 返回DataGrid的模板列的checkbox
        /// </summary>
        /// <param name="dgList">DataGrid</param>
        /// <returns>选中记录的值</returns>
        public static string[] getID (DataGrid dgList) {
            return getID(dgList, "chkID");
        }

        /// <summary>
        /// 返回DataGrid的模板列的checkbox
        /// </summary>
        /// <param name="dgList">DataGrid</param>
        /// <param name="chkID">checkbox的服务器端ID</param>
        /// <returns>选中记录的值</returns>
        public static string[] getID (DataGrid dgList, string chkID) {
            return getID(dgList, chkID, 0);
        }

        /// <summary>
        /// 返回DataGrid的模板列的checkbox
        /// </summary>
        /// <param name="dgList">DataGrid</param>
        /// <param name="chkID">checkbox的服务器端ID</param>
        /// <param name="index">选中的值的索引列</param>
        /// <returns>选中记录的值</returns>
        public static string[] getID (DataGrid dgList, string chkID, int index) {
            IList list = new ArrayList();
            foreach(DataGridItem dgi in dgList.Items) {
               
                //chkID是每个记录项的ID,记住，这是服务器端的ＩＤ，不是客户端的ＩＤ．
                System.Web.UI.Control l_ct = dgi.Cells[0].FindControl(chkID);
                if(l_ct != null) {
                    //下面语句是判断是否记录项的checkbox框初选种
                    if(((System.Web.UI.WebControls.CheckBox)l_ct).Checked) {
                        list.Add(dgi.Cells[index].Text);
                    }
                }
            }
            if (list.Count == 0) {
                return null;
            } else {
                string[] s = new string[list.Count];
                list.CopyTo(s, 0);
                return s;
            }
        }

        /// <summary>
        /// 设置datagrid的分页
        /// </summary>
        /// <param name="dg">datagrid</param>
        /// <param name="dt">datatable</param>
        public static void SetPage (DataGrid dg, DataTable dt) {
            //最大页
            int maxPage = (int)(dt.Rows.Count + dg.PageSize - 1) / dg.PageSize;

            if (maxPage == 0) {
                maxPage = 1;
            }

            if (dg.CurrentPageIndex >= maxPage){
                dg.CurrentPageIndex = maxPage - 1;
            }
          
            //如果是DataGridTable,设置全部记录数,Polluxliu.Common.DataGridTable只是为了兼容CRM之前的项目
            if (dg.GetType().FullName.Equals("Polluxliu.Common.DataGridTable")) {
                //((Polluxliu.Common.DataGridTable)dg).MaxRecord = dt.Rows.Count;
            } else if (dg.GetType().FullName.Equals("Polluxliu.UI.WebControls.DataGridTable")) {
                ((Polluxliu.UI.WebControls.DataGridTable)dg).MaxRecord = dt.Rows.Count;
            }

            dg.DataSource = dt;
        }
    }
}