jqgrid by using [WebMethod] inside aspx file - asp.net

Question

I'm using jqgrid for my project.
So far, jqgrid is ok while I'm using with ahsx file
But when I try to use [WebMethod] in aspx file, I get error 500.
Here is my jqgrid setting
$(document).ready(function () {
$("#JQGrid").jqGrid({
url: 'Testing.aspx/LoadMachineCapacity',
mtype: 'POST',
ajaxGridOptions: { contentType: 'application/json; charset=utf-8' },
datatype: "json",
postData: {},
height: 100,
autowidth: true,
loadtext: "Loading...",
colModel: [
{
name: 'MACHINEID',
index: 'MACHINEID',
label: 'Machine ID',
sortable: false,
editable: false
},
{
name: 'ISACTIVE',
index: 'ISACTIVE',
label: 'IS ACTIVE',
sortable: false,
editable: true
}],
loadonce: true,
serializeGridData: function (postData) {
return JSON.stringify(postData);
},
multiselect: false,
caption: 'Machines',
pager: '#JQGridPager',
pgbuttons: true, rowNum: 10, rowList: [10, 20, 30],
rownumbers: true,
viewrecords: true
, cellEdit: true
, afterEditCell: function (rowid, cellname, value, iRow, iCol) {
alert(value);
},
loadError: function (jqXHR, textStatus, errorThrown) {
alert('HTTP status code: ' + jqXHR.status + '\n' +
'textStatus: ' + textStatus + '\n' +
'errorThrown: ' + errorThrown + '\n' +
'errorDesc.: ' + jqXHR.responseText);
}
});
$("#JQGrid").navGrid('#JQGridPager',
{ view: false, edit: false, search: true, add: false, del: false, refresh: true }
);
});
and here is my server-side code
[WebMethod]
public static string LoadMachineCapacity(string pageIndex)
{
string Result = "";
try
{
string strOracleCnnString = ConfigurationManager.ConnectionStrings["PKERP"].ConnectionString;
OracleConnection oracleConn = new OracleConnection(strOracleCnnString);
string strSQL = " SELECT * " +
" FROM T_CT_MCCP " ;
OracleDataAdapter dataAdapter = new OracleDataAdapter(strSQL, oracleConn);
DataTable dataTable = new DataTable();
dataAdapter.Fill(dataTable);
Result = JsonConvert.SerializeObject(dataTable, Formatting.Indented);
}
catch (Exception e)
{
Result = JsonConvert.SerializeObject(e.Message, Formatting.Indented);
}
return Result;
}
Thank in advance.
Thomas

Answer 1

There are a parameter at Webmethod.
However, your jqGrid setting not config at postData.
Change to postData: {pageIndex: "blabla"}.