jqGrid参数传递bug

出现原因###

//第一次查询时参数
var param = {userNo:111,userName:222,depId:1};

//第二次查询是参数
var param = {userNo:111,userName:222};

//执行方式,通过setGridParam
if(curPage.JqGridtable != undefined){
    curPage.JqGridtable.jqGrid("setGridParam",{url:url,postData:param}).trigger("reloadGrid");
}else{
    ......      
}

//最后第二次执行条件仍然为
var param = {userNo:111,userName:222,depId:1};

源码分析###

//源码中setGridParam方法有参数overwrite，当overwrite为true时，参数才会覆盖之前的；否则不覆盖    
setGridParam : function (newParams, overwrite){
    return this.each(function(){
        if(overwrite == null) {
            overwrite = false;
        }
        if (this.grid && typeof newParams === 'object') {
            if(overwrite === true) {
                var params = $.extend({}, this.p, newParams);
                this.p = params;
            } else {
                $.extend(true,this.p,newParams);
            }
        }
    });
},

解决办法###

//执行方式,增加参数overwrite为true
if(curPage.JqGridtable != undefined){
    curPage.JqGridtable.jqGrid("setGridParam",{url:url,postData:param},true).trigger("reloadGrid");
}else{
    ......      
}