GridView中的双向排序

. 设置GridView 的属性　AllowSorting="True"　否则没有可排序的下横线.
2. 邦定要序排的字段

<asp:BoundField HeaderText="货号" DataField="ch_MaterialID" SortExpression="ch_MaterialID">
<ItemStyle Height="10px" Width="100px" />
</asp:BoundField>

3. 写排序的事件代码:

//在排序发生前激发
protected void GVStorageMaterial_Sorting(object sender, GridViewSortEventArgs e)
{
ViewState["OrderDire"] = "ASC";
}
if (ViewState["OrderDire"].ToString() == "ASC")
ViewState["OrderDire"] = "DESC";
else
ViewState["OrderDire"] = "ASC";
string strSQLSel = StrSqlSearch();
this.InitializeGridview(strSQLSel);
}

4. 在显示GridView的视图中设置排序的属性.
string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"];

bool flagSel = objDBAccess.SearchSQL(strSQLSel, out objDS, out strMessage);
if (flagSel)
}