c# - Jquery Datatable ASP.NET Gridview Large DataSet -


i using "datatables jquery" asp.net gridview...

the gridview works fine small datasets large datasets (>5000 rows) takes time load , while grid loading loading circle not appear..

asp.net pseudocode -

<body id="dt_example"> <form runat=server> <asp:gridview id="gv" runat="server" cellpadding="5" cellspacing="5">     <rowstyle wrap="false" /> </asp:gridview>         </form> </body>

javascript -

<script type='text/javascript' charset='utf-8'>          $(document).ready(function () {             $('#gv').datatable({                     'bjqueryui': true,                     'spaginationtype': 'full_numbers',                     'bautowidth': true             });         });         </script>

code behind -

protected void page_load(object sender, eventargs e)     {         queryrslt(passtype, val);         gv.headerrow.tablesection = tablerowsection.tableheader;     }       public void queryrslt(string type, string value)     {         if (!string.isnullorempty(type))         {             if (type == "taskstatus")             {                 gv.datasource = tsk                                .where(x => x.status == value)                                         .select(m => new                                         {                                             id = m.incident_id,                                             taskid = m.task_id,                                             ci = m.ci,                                             status = m.status,                                             priority = m.priority,                                             reporteddate = m.task_assign_time,                                             assigneegroup = m.assignee_group,                                             assignedgroup = m.assigned_group,                                             responddate = m.incident_responded_date,                                             reason = m.status_reason                                         }).tolist();                 gv.databind();             }             else if (type == "incidentstatus")             {                 gv.datasource = inc                                .where(x => x.status == value)                                         .select(m => new                                         {                                             id = m.incident_id,                                             ci = m.ci,                                             status = m.status,                                             priority = m.priority,                                             reporteddate = m.incident_reported_date,                                             assigneegroup = m.assignee,                                             assignedgroup = m.assigned_group,                                             responddate = m.incident_responded_date,                                             reason = m.status_reason                                         }).tolist();                 gv.databind();             }}}

the loading gif appear fraction of second , disappears...

so there 2 things want know -

  1. display loading gif until whole gridview populated..

  2. decrease time of processing data..

you can use asp.net generic handlers instead of asp.net gridview binding in code-behind.

like

$('#gv').datatable({                 'bjqueryui': true,                 'spaginationtype': 'full_numbers',                 'bautowidth': true,                  'bprocessing': true,                  'bserverside': true,                  'sajaxsource': '/handlers/handlername.ashx'         });

and handler contains

   public class handlername : ihttphandler     {      public void processrequest(httpcontext context)         {             try             {                 // parameters sent plugin                 var idisplaylength = int.parse(context.request["idisplaylength"]);                  ////hold display start                 var idisplaystart = int.parse(context.request["idisplaystart"]);                  ////hold sort column                 var isortcol = int.parse(context.request["isortcol_0"]);                  ////hold sort direction such asc , desc                 var isortdir = context.request["ssortdir_0"];                  ////hold search keyword                 var ssearch = context.request["ssearch"];                                var variabletoholddata = classname.functionname();                  // define order function based on isortcol parameter                 func<variabletoholddata, object> order = p =>                 {                     //if sort column 1, fieldname                    if (isortcol == 1)                    {                         return p.fieldname2;                    }                 //    //if sort column 2, sort fieldname                    else if (isortcol == 2)                    {                         return p.fieldname3;                     }                      }                     //sort fieldname                    return p.fieldname1;                 };                 // define order direction based on isortdir parameter                 variabletoholddata = "desc" == isortdir ? variabletoholddata.orderbydescending(order) : variabletoholddata.orderby(order);                   // prepare anonymous object json serialization                 var result = new                 {                     itotalrecords = variabletoholddata.count(),                     itotaldisplayrecords = variabletoholddata.count(),                     aadata = variabletoholddata                          //search field name                         .where(p => p.fieldname1.tolower().contains(ssearch.tolower()) || p.fieldname2.tolower().contains(ssearch.tolower()) || p.fieldname3.tolower().contains(ssearch.tolower()) )                          //select fields                         .select(p => new[] { p.fieldname1.tostring(), p.fieldname2.tostring(), p.fieldname3.tostring() })                         .skip(idisplaystart)                         .take(idisplaylength)                  };                  var serializer = new javascriptserializer();                  //convert result json                 var json = serializer.serialize(result);                 context.response.contenttype = "application/json";                 context.response.write(json);              }             catch (exception)             {                  throw;             }          }            public bool isreusable         {                         {                 return false;             }         }     }           public class classname     {         public string fieldname1 { get; set; }         public string fieldname2 { get; set; }         public string fieldname3 { get; set; }           public static ienumerable<classname> functionname()         {               //return data source             dt= obj.returndata();              //check candidate profile datatable  null             if (dt != null && dt.rows.count > 0)             {                  foreach (datarow row in dt.rows)                 {                     yield return new classname                     {                            fieldname1 = row["columnname1"].tostring(),                           fieldname1 = row["columnname2"].tostring(),                           fieldname1 = row["columnname3"].tostring(),                                        };                 }             }          }      }         }

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