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();}
2.下面这个方法是自己写的，翻页事件中调用。private void ChangePageDataBind() { 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(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();}
上面两方法只要修改要排序的字段名，就可以直接调用了.1方法很简单使用,这里就不说了.2方法是这样用的: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) { //异常 }}
谢谢阅读!
