How to get searchString in ASP.NET with jqGrid

Question

front-end:

$("#UsersGrid").jqGrid({
    url: "jqGridHandler.ashx",
    mtype: 'post',
    datatype: 'json',
    height: 250,
    colNames: ['CardNumber', 'CardType', 'CardGrade', 'CanUseMoney', 'MemberName'],
    colModel: [
        { name: 'CardNumber', index: 'CardNumber', width: 150, search: true,
            searchoptions: { sopt: ['eq']}},
        { name: 'CardType', width: 150},
        { name: 'CardGrade', width: 150 },
        { name: 'CanUseMoney', width: 150 },
        { name: 'MemberName', width: 150, search: true,
            searchoptions: { sopt: ['eq']} }
    ],
    rowNum: 10,
    rowList: [10, 20, 30],
    sortname: 'CardNumber',
    viewrecords: true,
    sortorder: 'asc',
    caption: 'card',
    pager: $("#pager")
}).navGrid('#pager',
    { search: true, edit: false, add: false, del: false, searchtext: "search" });

jqGridHandler.ashx:

HttpRequest request = context.Request;

string _searchsrt = request["searchString"];

I would like to get searchString in "jqGridHandler.ashx", but I found it is "" how to do? can any one help me out? tks!

Answer 1

You can use HttpRequest to get the parameters which send jqGrid. The code can be about the following:

public class jqGridHandler: IHttpHandler {
    public void ProcessRequest(HttpContext context) {
        HttpRequest request = context.Request;
        HttpResponse response = context.Response;

        // get parameters sent from jqGrid
        string numberOfRows = request["rows"];
        string pageIndex = request["page"];
        string sortColumnName = request["sidx"];
        string sortOrderBy = request["sord"];
        string isSearch = request["_search"];
        string searchField = request["searchField"];
        string searchString = request["searchString"];
        string searchOper = request["searchOper"];

        // construct the JSON data based on the 
        string output = BuildJQGridResults (
            Convert.ToInt32 (numberOfRows),
            Convert.ToInt32 (pageIndex),
            Convert.ToInt32 (totalRecords),
            isSearch!= null && String.Compare (isSearch, "true",
                                               StringComparison.Ordinal) == 0,
            searchField,
            searchString,
            searchOper
        );

        response.ContentType = "application/json";
        response.Write (output);
    }

It's important that the parameters searchString, searchField and searchOper will be set only if the user uses single searching dialog (you don't set multipleSearch: true option). For the Advanced Searching dialog the parameter filters will be used. If the user don't used any searching dialog the corresponding parameters (searchString, searchField, searchOper or filters) will be null.