c# - Json Dropdown Postback Response -

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my ajax calls:

$(document).ready(function() {     $.ajax({         type: "post",         url : "hazzardsdashboards.aspx/getreport",         data: "{}",         contenttype: 'application/json',         datatype: 'json',          complete: function (jqxhr)         {            var data = json.parse(jqxhr.responsetext);            trendchart(data);         },         error: function (error) {            alert("error");         }     });      $(".ddlchange").change(function () {         $.ajax({             type: "post",             url : "hazzardsdashboards.aspx/getreport1",             data:  json.stringify({ company: $("#ddl_permitcmpny").val(), dept: $("#ddl_agency").val() }),             contenttype: 'application/json',             datatype: 'json',             complete: function (jqxhr)             {                 var data = json.parse(jqxhr.responsetext);                 trendchart(data);             },             error :function(jqxhr,textstatus,errorthrown)             {                 alert("an error occurred whilst trying contact server: " + jqxhr + " " + textstatus + " " + errorthrown);             }         });     }); });

server methods:

[webmethod] public static list<dictionary<string, object>> getreport() {     list<dictionary<string, object>> rows = new list<dictionary<string, object>>();      try     {              string strqry = string.empty;              strqry = " select year(dt_modifiedon)[date],count(*) [hazardcount] tbl";             strqry += " int_pluginid = 4 , int_featureid=35  ";             strqry += " group year(dt_modifiedon) ";              using (commonmanager)             {                 datatable dt = commonmanager.executedatatable(strqry);                  dictionary<string, object> row;                 foreach (datarow dr in dt.rows)                 {                     row = new dictionary<string, object>();                     foreach (datacolumn col in dt.columns)                     {                         row.add(col.columnname, dr[col]);                     }                     rows.add(row);                 }             }         }       catch (exception ex)     {          throw ex;     }     return rows; }  [webmethod] public static list<dictionary<string, object>> getreport1(string company, string dept) {     list<dictionary<string, object>> rows = new list<dictionary<string, object>>();      try     {         string strqry = string.empty;          strqry = " select year(mwl.dt_modifiedon)[date],count(*) [hazardcount] tbl";         strqry += " left outer join tbl1 thzd on thzd.int_hazard_id = mwl.str_objectid";         strqry += " int_pluginid = 4 , int_featureid=35 ";         if (company != "")         {             if (company == "1")             {                 strqry += " ,  str_reportfromtype = 'e'";             }             else             {                 strqry += " ,  str_reportfromtype = 'c'";             }         }          if (dept != null && dept != string.empty)         {             if (company == "1")             {                 strqry += " , thzd.str_72_me = '" + dept + "' ";             }             if (company == "2")             {                 strqry += " , thzd.smallint_5865_me = '" + dept + "' ";             }          }           strqry += " group year(mwl.dt_modifiedon) ";          using (commonmanager)         {             datatable dt = commonmanager.executedatatable(strqry);              dictionary<string, object> row;             foreach (datarow dr in dt.rows)             {                 row = new dictionary<string, object>();                 foreach (datacolumn col in dt.columns)                 {                     row.add(col.columnname, dr[col]);                 }                 rows.add(row);             }         }     }     catch (exception ex)     {          throw ex;     }     return rows; }

i getting same json response both ajax calls, after dropdown selection getting same json response. data overriden after dropdown selection , data not being reflected.

ajax call firing , going respective method data not being reflected , showing same data. need different json responses different ajax calls when dropdown changes , page load.

please note first ajax call run every single time page loads.i'm suspecting after call getreport1() post happens , jquery load event runs override trendchart() logic calling getreport().

you can place alert('page loading...'); statement after $(document).ready(function(){ test theory.

you using asp.net dropdownlist control causes post back, if that's case try replacing simple html <select> , see if fixes problem


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