Jqgrid filter is not working with Dropdownlist in Asp.net

[RRob13]

hii Guys !! I implemented filter with dropdownlist in jqgrid but grid is not showing the values of the column on which i added filter neither is filtering the data..Here is my code...\[code\]<script type="text/javascript"> var categoriesStr = ":All;1:vikas;2:Ankur"; $(function () { $("#UsersGrid").jqGrid({ url: 'getGriddahico.ashx', datatype: 'json', height: 250, colNames: ['UserID', 'UserName', 'FirstName', 'MiddleName', 'LastName', 'EmailID'], colModel: [ { name: 'UserID', index: 'UserID', width: 100, sortable: true, align: 'center' }, { name: 'UserName', width: 100, sortable: true, align: 'center' , formatter: 'select', stype: 'select', sorttype: function (cell) { return categories[cell]; }, edittype: 'select', editoptions: { value: categoriesStr }, searchoptions: { sopt: ['eq'] } }, { name: 'FirstName', width: 100, sortable: true, align: 'center' }, { name: 'MiddleName', width: 100, sortable: true }, { name: 'LastName', width: 100, sortable: true, align: 'center' }, { name: 'EmailID', width: 150, sortable: true, align: 'center' } ], rowNum: 10, rowList: [10, 20, 30], pager: '#UsersGridPager', sortname: 'UserID', loadonce: true, viewrecords: true, ignorecase:true, sortorder: 'asc', autowidth: true, toppager: true, height: '100%' }); $("#UsersGrid").jqGrid('navGrid', '#UsersGridPager', { edit: false, add: false, del: false, search: false }); $("#UsersGrid").jqGrid('filterToolbar', { stringResult: true, searchOnEnter: true, defaultSearch: "cn", beforeSearch: function () { //alert("verifying the data"); var postData = http://stackoverflow.com/questions/14576924/grid.jqGrid('getGridParam', 'postData'); // we use `stringResult: true` so decoding of the search parameters are a little complex var searchData = http://stackoverflow.com/questions/14576924/jQuery.parseJSON(postData.filters); for (var iRule = 0; iRule < searchData.rules.length; iRule++) { if (searchData.rules[iRule].field ==="UserName") { var valueToSearch = searchData.rules[iRule].data; if (valueToSearch.length != 5) { alert("The search string MUST de 5 charachters length!"); return true; // error } } } return false; } }); //jQuery("#UsersGrid").jqGrid('filterToolbar', { stringResult: true, searchOnEnter: false }); });</script>\[/code\]Anyhelp will be welcomed ...Thanx in advance