c# - GridObjectDataSource DataTable Sorting with parameters -

my trouble not know howto pass events sort datatable. have listed .aspx page, , flow of behind .cs file bindthrottles function. looking simple solution uses datatable. saw other code looked simple used events posted @ end, not sure howto form use.

my .aspx page configured as..

<asp:objectdatasource id="gridobjectdatasource"      runat="server"  selectmethod="bindthrottles"                                                                 typename="websitenamespace.throttleinterval"      sortparametername="sortby">    <selectparameters>     <asp:controlparameter controlid="gvthrottles"           name="sortdirection" propertyname="sortdirection" />   </selectparameters>  </asp:objectdatasource>  <asp:gridview   id="gvthrottles" allowsorting="true" runat="server"      datakeynames="userid" datasourceid="gridobjectdatasource" >   <columns>   <asp:templatefield headertext="userid" sortexpression="userid">       <itemtemplate>           <asp:label id="lblitemuserid" runat="server"                text='<%# eval("userid") %>'></asp:label>                    </itemtemplate>   </asp:templatefield>   <asp:templatefield headertext="requests" sortexpression="requests">       <itemtemplate>           <asp:label id="lblitemnumrequests" runat="server"                text='<%# eval("requests") %>'></asp:label>                     </itemtemplate>  </columns>    </asp:gridview> 

my bindthrottles method configured...

public datatable bindthrottles(string sortby, int sortdirection){      //..code run queries mongodb     //..code create columns , rows of datatable     //..code fill rows data mongodb      *************************************************************     //.. need code here let datatable sort on      //.. column header link asc or desc.     ************************************************************* } 

i saw stackoverflow post shows code like...

dt.defaultview.sort = e.sortexpression + " " +     getsortdirection(e.sortexpression); 

and getsortdirection configured

public string getsortdirection(string column)     {          // default, set sort direction ascending.         string sortdirection = "asc";          // retrieve last column sorted.         string sortexpression = viewstate["sortexpression"] string;          if (sortexpression != null)         {             // check if same column being sorted.             // otherwise, default value can returned.             if (sortexpression == column)             {                 string lastdirection = viewstate["sortdirection"] string;                 if ((lastdirection != null) && (lastdirection == "asc"))                 {                     sortdirection = "desc";                 }             }         }         // save new values in viewstate.         viewstate["sortdirection"] = sortdirection;         viewstate["sortexpression"] = column;          return sortdirection;     } 

but don't know how form can use events sort inside function has set parameters not events, or if there better way sort both asc , desc column header link.

additional information: new asp. inherited project, why function still called bindthrottles, thought trying eliminate binding(co-workers advice).

here in function sortexpression column name , sortdirection order sort ie(ascending or descending ). both values stored in viewstate can use in event.you can use function :

    dataview dv = new dataview(dttable);     dv.sort = columnname + " " + getsortdirection(columnname);     gridview1.datasource = dv;     dttable = dv.totable();     gridview1.databind(); 

where dttable datatable