用AspxGridview做成论坛帖子列表

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using ASPxGridviewTest.Business;
using System.Drawing;

namespace ASPxGridviewTest
{
    public partial class test : System.Web.UI.Page
    {
        TeaInfoDataContextDataContext dataContext = new TeaInfoDataContextDataContext();
        protected void Page_Load(object sender, EventArgs e)
        {
            databind();
           
        }

        protected void ASPxGridView1_CustomColumnDisplayText(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewColumnDisplayTextEventArgs e)
        {
            if (e.Column.FieldName == "CardSubject")
            {
                //判断字符长度，添加省略号，当然能也可以用e.Value .ToString ().Length 来对所有的列项判断
                string s = ASPxGridView1.GetRowValues(e.VisibleRowIndex, "CardSubject").ToString();
                if (s.Length > 20)
                {
                    e.DisplayText = SubStr(s, 20);
                    s = SubStr(s, 20);//s作为传值
                }
                //添加new字样
                System.DateTime data1 = (System.DateTime)(ASPxGridView1.GetRowValues(e.VisibleRowIndex, "CreateTime"));
                System.DateTime data2 = System.DateTime.Now;
                System.TimeSpan diff = data2.Subtract(data1);
                int i = diff.Days;
                if (i > 0 && i < 7)
                    e.DisplayText = TimeFormate(s);
            }
            
        }
        private  string SubStr(string sString, int nLeng)
        {
            if (sString.Length <= nLeng)
            {
                return sString;
            }
            string sNewStr = sString.Substring(0, nLeng);
            sNewStr =sNewStr + "" ;
            return sNewStr;
        }
        private string TimeFormate(string s)
        {
            s = s + "<font color=red>" + "new" + "</font>";
            return s;

        }
        protected void ASPxGridView1_Init(object sender, EventArgs e)
        {
            databind();
        }
        private void databind()
        {
            this.ASPxGridView1.DataSource = dataContext.CardInfo.ToList();
            this.ASPxGridView1.DataBind();
        }

        protected void ASPxGridView1_HtmlRowPrepared(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewTableRowEventArgs e)
        {
            if (e.RowType != DevExpress.Web.ASPxGridView.GridViewRowType.Data) return;
            //换行变色
            if (e.VisibleIndex % 2 == 0)
                e.Row.BackColor = ColorTranslator.FromWin32(16508626);
        }

        
    }
}