要想实现翻页后继续排序,实现这样的效果:
比如共 15笔记录，每页显示10条
则排序时:第一页将前10条记录排序，翻第二页时后五条再单独排序.
要注意以下几点:
1.如果数据很多,最好不要把数据集放到缓存中(viewstate),影响性能
2. ViewState中存放上次是哪个e.expression并且存放此e.expression是升序还是降序
示例如下:
1.现有的排序事件是这样写的,这个是点击上面排序标题时用:
private void grdProjTrace_SortCommand(object source, DataGridSortCommandEventArgs e)
{
this.grdProjTrace.CurrentPageIndex = 0;
DataView dv = 得到数据代码;
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();
}