jqGrid in ASP.NET WebForms

<table id="UsersGrid"></table>

<script type="text/javascript">
    $(document).ready(function () {
        $('#UsersGrid').jqGrid({
            colNames: ['Online', 'Computer', 'IP', 'User'],
            colModel: [
                { name: 'IsOnline', width: 100, index: 'IsOnline', searchoptions: { 开发者_如何学Csopt: ['eq', 'ne']} },
                { name: 'Name', index: 'Name', searchoptions: { sopt: ['eq', 'ne', 'cn']} },
                { name: 'IP', index: 'IP', searchoptions: { sopt: ['eq', 'ne', 'cn']} },
                { name: 'User', index: 'User', searchoptions: { sopt: ['eq', 'ne', 'cn']} }
              ],
            height: 250,
            datatype: getDataType
        });
    });

    function getDataType() {
        var grid = $("#UsersGrid");

        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "/GridTest/GridTestService.asmx/GetData",
            data: jqGridSettings(grid),
            dataType: "json",
            success: function (response) {
                jqGridDataReceived(response.d, grid);
            }
        });
    }

    function jqGridSettings(grid) {
        return "{}";

        var settings = {

        };

        return JSON.stringify(settings);
    }

    function jqGridDataReceived(json, grid) {
        var rows = JSON.parse(json).rows;

        grid.clearGridData();
        for (var i = 0; i < rows.length; i++) {
            grid.addRowData(i + 1, rows[i]);
        }
    }
</script>

I want to pass the original search parameters to the server-side, how can I retrieve them with javascript?

Namely, where can I get the grid's postData?

---

It seems to me that the origin of the problem which you try to solve is the datatype: getDataType parameter which you use. You use some very old code example from the time of vary old jqGrid versions. Look at here for an example how you can call ASMX web service using datatype: 'json' and additional ajaxGridOptions and serializeGridDataparameters.

If you do want to use "retro style" with datatype as a function you can use postData parameter and define getDataType as function getDataType(postdata) {.... The postdata parameter contains all information which you need.