error: :1 Uncaught TypeError: Cannot read proper on json2-mi

Question

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function FunctionRetunrSave(jsondata) {

debugger;

$('#<%= TrGrid.ClientID %>').show();

// $("#list1").jqGrid("clearGridData", true);

------- 

$(document).ready(function() {  -- iam  getting that error on this line

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var lastsel2;

jQuery("#list1").jqGrid({

datatype: "local",

colNames: ['StockistCode', 'StockistName', 'DIVISION_NAME'],

colModel: [

{ name: 'StockistCode', index: 'StockistCode', width: 500 },

{ name: 'StockistName', index: 'StockistName', width: 500 },

{ name: 'DIVISION_NAME', index: 'DIVISION_NAME', width: 500 },

],

pager: jQuery('#pager1'),

sortable: false,

viewrecords: true,

caption: "Query List",

width: 1100

}).navGrid(pager, { edit: false, add: true, del: false, refresh: true, search: false });

var mydata;

var thegrid = jQuery("#list1")[0];

if (jsondata != null) {

thegrid.addJSONData(JSON.parse(jsondata.responseText).d);

mydata = JSON.parse(jsondata.responseText).d;

}

var $grid = $("#list1");

for (var i = 0; i <= mydata.length; i++) {

jQuery("#list1").jqGrid('addRowData', i + 1, mydata[i]);

}

});

}

 

How to resolve this error ,Please do need full to me