Question

好吧......所以基本上我正在创建一个全球搜索＆＃34;对于包含超过4000条记录的表格......我的大部分工作都在运行......我在ajax调用中设置了停止点，并且它提供了从下拉列表中选择的参数。

问题：在动作方法中，参数是＆＃34; Null＆＃34;即使我在查看JS时它的变量值仍然存在......

我正在尝试根据所选参数生成数据表......

我需要帮助将结果从AJAX调用传递给实际正在搜索表的C＃方法...

这是代码......

function materialType() {
    $('#search_results').html("Loading...");
    var material_type = $('#material_type_name').find(':selected').text();
    var search_query = $('#query').val();
    var sub_type = "";
    //var params = JSON.stringify({ 'search_query': search_query, 'type_name': material_type, 'sub_type_name': sub_type })
    $.ajax({
        url: "/AdvancedMaterialSearch/MultipleParams",
        contentType: 'application/json; charset=utf-8',
        data: JSON.stringify({ search_query: search_query, type_name: material_type, sub_type_name: sub_type }),
        dataType: 'json',
        //dataType: "html",
        success: function (data) {
            $('#search_results').html(data);
            $('#results').DataTable();
        }
    });

}

public ActionResult MultipleParams(string search_query,string type_name,string sub_type_name)
    {
        try
        {
            var str_query = "";
            var material_type_id = 0;
            var str_sub_type = "";

            if (search_query != null)
            {
                str_query = search_query;
            }

            if (type_name != null)
            {
                material_type_id = db.t_material_types.FirstOrDefault(x => x.material_type == type_name).material_type_id;
            }
            if(sub_type_name != null)
            {
                str_sub_type = sub_type_name;
            }

            //check if str_query is entered but NO material_type was selected
            if (!string.IsNullOrWhiteSpace(str_query) && material_type_id == 0)
            {
                ViewBag.SearchResults = db.t_material_master.Where(s =>s.color_code.Contains(str_query) || s.color_name.Contains(str_query) || s.description.Contains(str_query) || s.sap_number.Contains(str_query) || s.width.Contains(str_query) || s.weight.Contains(str_query) || s.size.Contains(str_query) || s.uom.material_uom_name.Contains(str_query) || s.vendor.vendor_name.Contains(str_query)).ToList();
                if (ViewBag.SearchResults.Count == 0)
                {
                    return PartialView("/Views/AdvancedMaterialSearch/SearchResultPartials/_NoResultsFound.cshtml");
                }
            }

            //check if str_query is NOT entered but a material_type WAS selected
            if (string.IsNullOrWhiteSpace(str_query) && material_type_id != 0)
            {
                ViewBag.SearchResults = db.t_material_master.Where(s => s.material_type_id == material_type_id).ToList();
                if (ViewBag.SearchResults.Count == 0)
                {
                    return PartialView("/Views/AdvancedMaterialSearch/SearchResultPartials/_NoResultsFound.cshtml");
                }
            }

            //check if both str_query IS entered and a material_type WAS selected
            if (!string.IsNullOrWhiteSpace(str_query) && material_type_id != 0)
            {
                ViewBag.SearchResults = db.t_material_master.Where(s => s.material_type_id == material_type_id && s.color_code.Contains(str_query) || s.color_name.Contains(str_query) || s.description.Contains(str_query) || s.sap_number.Contains(str_query) || s.width.Contains(str_query) || s.weight.Contains(str_query) || s.size.Contains(str_query) || s.uom.material_uom_name.Contains(str_query) || s.vendor.vendor_name.Contains(str_query)).ToList();
                if (ViewBag.SearchResults.Count == 0)
                {
                    return PartialView("/Views/AdvancedMaterialSearch/SearchResultPartials/_NoResultsFound.cshtml");
                }
            }
            return PartialView("/Views/AdvancedMaterialSearch/SearchResultPartials/_SearchFieldOnly.cshtml");
        }
        catch (Exception e)
        {
            Debug.Print(e.Message);
            return PartialView("/Views/AdvancedMaterialSearch/SearchResultPartials/_NoResultsFound.cshtml");
        }
    }

Answer 1

不需要JSON.stringify，只需更改ajax调用的data，如下所示： -

data: { search_query: search_query, type_name: material_type, sub_type_name: sub_type },

并且由于您从控制器操作返回PartialView（HTML），因此如图所示更改dataType： -

dataType: 'html',// it should be html not json

Answer 2

试试这样：

data: { search_query: search_query, type_name: material_type, sub_type_name: sub_type }

如果没有JSON.stringify，它应该可以使用，具体取决于您使用的MVC版本。

我需要帮助将参数从Ajax传递给C＃方法

2 个答案: