问题描述

这是我的 jqGrid 调用 web 方法

This is my jqGrid calling web method

$(document).ready(function () {
    jQuery("#prodgrid").jqGrid({
        url: 'product_brow.aspx/ProdGrid',
        postData: {
            ddlproductstatus: function() {
                return  $("#<%=ddlProductStatus.ClientID%>").val();
            },
            ddlproducttype: function() {
                return  $("#<%=ddlProductType.ClientID%>").val();
            }, 
            txtkeywordsearch: function() {
                return  $("#<%=txtKeywordSearch.ClientID%>").val();
            },
            hdnMerchantId: function() {
                return  $("#<%=hdnmerchantId.ClientID%>").val();
            }
        },
        mtype: 'POST',
        serializeEditData: function (postData) {
            return JSON.stringify(postData);
        } ,
        colNames: ['Code', 'Title', 'Price', 'Product Group', 'Edit', 'Status'],
        colModel: [
            { name: 'Code', index: 'Code', width: 15, align: 'center' },
            { name: 'Title', index: 'Title', width: 40, align: 'center' },
            { name: 'Price', index: 'Price', width: 55 },
            { name: 'Product Group', index: 'Product Group', width: 55 },
            { name: 'Edit', index: 'Edit', width: 40 },
            { name: 'Status', index: 'Status', width: 40}],
        pager: '#prod_pager',
        rowList: [10, 20, 30],
        sortname: 'Code',
        sortorder: 'desc',
        rowNum: 10,
        loadtext: "Loading....",
        shrinkToFit: true,
        multiselect: true,
        emptyrecords: "No records to view",
        width: x - 40,
        height: 230,
        rownumbers: true,
        subGrid: true,
        caption: 'Products'
        // editurl: 'Departments.aspx' 
    });
    jQuery("#prodgrid").jqGrid('navGrid', '#prod_pager',
        { edit: false, add: false, del: true, excel: true, search: false });
});

如您所见，我正在尝试使用这样的参数将数据从这里传递到 web 方法

as you can see im trying to pass data from here to web method with parameters like this

[WebMethod]
public static string ProdDetails(string ddlproductstatus,
                                 string ddlproducttype,
                                 string txtkeywordsearch,
                                 string hdnMerchantId)
{
    StringBuilder sbReturnJson = new StringBuilder();
    string strReturnJson = string.Empty;
    StringBuilder sbCell = new StringBuilder();

    try
    {
        string sort = HttpContext.Current.Request.Form["sidx"].ToString();
        string strSortDerection = HttpContext.Current.Request.Form["sord"].ToString();
        int iPage = Convert.ToInt32(HttpContext.Current.Request.Form["page"]);//get the requested page
        string strLimit = HttpContext.Current.Request.Form["rows"].ToString(); // get how many rows we want to have into the grid
        string strStart = Convert.ToString(int.Parse(strLimit) * (iPage - 1));
        string strEnd = Convert.ToString(int.Parse(strStart) + int.Parse(strLimit));

        string pageNo = string.Empty;
        ProductDal oProductDal = new ProductDal();

        // bind data to gridview

        System.Data.DataTable oDataTable;

        if (txtkeywordsearch.Trim().Length == 0)
        {
            oDataTable = oProductDal.GetAllProductDtToDisplayTest(Convert.ToInt32(hdnMerchantId), ddlproducttype,
                ddlproductstatus, iPage, Convert.ToInt32(strLimit));
        }
        else
        {
            oDataTable = oProductDal.GetAllProductDtToDisplayBySearchStringTest(Convert.ToInt32(hdnMerchantId), ddlproducttype,
              ddlproductstatus, txtkeywordsearch.Trim(), iPage, Convert.ToInt32(strLimit));
        }

        // keep values in session to use in product detail page to retrieve records.
        //Session["ProductType"] = ddlproducttype;
      //  Session["ProductStatus"] = ddlproductstatus;

        if (txtkeywordsearch.Trim().Length != 0)
        {
           // Session["SearchKeyword"] = txtkeywordsearch;
        }


        //  hlnkExportToExcel.Visible = false;

        // calculate the total number of records.
        int totalRows = 0;

        if (txtkeywordsearch.Trim().Length == 0)
        {
            totalRows = oProductDal.CountAllProductDtToDisplay(Convert.ToInt32(hdnMerchantId), ddlproducttype,
                    ddlproductstatus);
        }

        else
        {
            totalRows = oProductDal.CountAllProductDtToDisplayBySearchString(Convert.ToInt32(hdnMerchantId), ddlproducttype,
                    ddlproductstatus, txtkeywordsearch.Trim());
        }

        //if (!IsPostBack)
        //{
        //    gvProductBrow.PageIndex = _currentPageNumber;
        /