要想實現翻頁后繼續排序,實現這樣的效果:
比如共 15筆記錄，每頁顯示10條
則排序時:第一頁將前10條記錄排序，翻第二頁時后五條再單獨排序.

要注意以下幾點:
1.如果數據很多,最好不要把數據集放到緩存中(viewstate),影響性能

2. viewstate中存放上次是哪個e.expression并且存放此e.expression是升序還是降序

示例如下:
1.現有的排序事件是這樣寫的,這個是點擊上面排序標題時用:
  private void grdprojtrace_sortcommand(object source, datagridsortcommandeventargs e)
{
 this.grdprojtrace.currentpageindex = 0;
 dataview dv = 得到數據代碼;
 string strsort = "";
 string strorder ="";//排序方式。0，降序，1升序
 if(viewstate["sortexpresstion"] != null)
 {
  strsort = viewstate["sortexpresstion"].tostring();
  strsort = strsort.substring(0,strsort.length -1);
  strorder = viewstate["sortexpresstion"].tostring();
  strorder = strorder.substring(strorder.length -1);
 }
 if(e.sortexpression == "customername")
 {
  if(strsort != "customername")
  {
   this.viewstate["sortexpresstion"] = ustomername0";
   dv.sort = "customername desc";
  }
  else
  {
   if(strorder == "0")
   {
    this.viewstate["sortexpresstion"] = "customername1";
    dv.sort = "customername asc";
   }
   else
   {
    this.viewstate["sortexpresstion"] = "customername0";
    dv.sort = "customername desc";
   }
  }
 }
if(e.sortexpression == "fullname")
 {
  if(strsort != "fullname")
  {
   this.viewstate["sortexpresstion"] = "fullname0";
   dv.sort = "fullname desc";
  }
  else
  {
   if(strorder == "0")
   {
    this.viewstate["sortexpresstion"] = "fullname1";
    dv.sort = "fullname asc";
   }
   else
   {
    this.viewstate["sortexpresstion"] = "fullname0";
    dv.sort = "fullname desc";
   }
  }
 }   
        this.grdprojtrace.datasource = dv;
 this.grdprojtrace.databind();
}

2.下面這個方法是自己寫的，翻頁事件中調用。
private void changepagedatabind()  
{
 dataview dv = 得到數據代碼;
 string strsort = "";
 string strorder ="";//排序方式。0，降序，1升序
 if(viewstate["sortexpresstion"] != null)
 {
  strsort = viewstate["sortexpresstion"].tostring();
  strsort = strsort.substring(0,strsort.length -1);
  strorder = viewstate["sortexpresstion"].tostring();
  strorder = strorder.substring(strorder.length -1);
 }
 if(this.viewstate["sortexpresstion"] != null)
 {    
  if(strsort == "customername")
  {
   if(strorder == "1")
   {
    this.viewstate["sortexpresstion"] = "customername1";
    dv.sort = "customername asc";
   }
   else
   {
    this.viewstate["sortexpresstion"] = "customername0";
    dv.sort = "customername desc";
   }
  }
 }
 if(this.viewstate["sortexpresstion"] != null)
 {    
  if(strsort == "fullname")
  {
   if(strorder == "1")
   {
    this.viewstate["sortexpresstion"] = "fullname1";
    dv.sort = "fullname asc";
   }
   else
   {
    this.viewstate["sortexpresstion"] = "fullname0";
    dv.sort = "fullname desc";
   }
  }
 }   
this.grdprojtrace.datasource = dv;
this.grdprojtrace.databind();
}

上面兩方法只要修改要排序的字段名，就可以直接調用了.
1方法很簡單使用,這里就不說了.
2方法是這樣用的:
private void grdprojtrace_pageindexchanged(object source, datagridpagechangedeventargs e)
{
 try
 {    
  try
  {
     this.grdprojtrace.currentpageindex = e.newpageindex;
  }
  catch
  {
   this.grdprojtrace.currentpageindex = 0;
  }

  
  this.changepagedatabind();
 }
 catch(system.exception errws)
 {  
         //異常
 }
}

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