if (!ispostback)  {    if(this.kjkm_dg.attributes["sortexpression"]==null) //這里kjkm_dg為datagrid   id    {     this.kjkm_dg.attributes["sortexpression"]="kmdm";  //這里給datagrid增加一個排序屬性，且默認排序表達式為kmdm;     kjkm_dg.attributes["sortdirection"]="asc"; //這里給datagrid增加一個排序方向屬性,且默認為升序排列;    }    mikecatbind(); //綁定函數,下面介紹  }   protected void mikecatbind()  {   string sqlstr="select * from zc_kjkm";   dataview dv=new dataview();      string sortexpression=kjkm_dg.attributes["sortexpression"];   string sortdirection=kjkm_dg.attributes["sortdirection"];   dv=us.bind(sqlstr).tables[0].defaultview;  //來自web service的dataset,這里隨便一個ds就可以;   dv.sort=sortexpression+" "+sortdirection; //指定視圖的排序方式;   kjkm_dg.datasource=dv; //指定數據源   kjkm_dg.databind(); //數據綁定  }

private void kjkm_dg_sortcommand(object source, system.web.ui.webcontrols.datagridsortcommandeventargs e)  {   string sortexpression=e.sortexpression.tostring();  //獲得當前排序表達式   string sortdirection="asc"; //為排序方向變量賦初值   if(sortexpression==kjkm_dg.attributes   ["sortexpression"])  //如果為當前排序列   {    sortdirection=(kjkm_dg.attributes["sortdirection"].tostring()==sortdirection?"desc":"asc");     //獲得下一次的排序狀態   }   kjkm_dg.attributes["sortexpression"]=sortexpression;   kjkm_dg.attributes["sortdirection"]=sortdirection;   mikecatbind();  }