【第十篇】easyui-datagrid排序（转）

本文体验datagrid的排序。

□ 思路

当点击datagrid的标题，视图传递给Controller的Form Data类似这样：page=1&rows=10&sort=CustomerID&order=asc。为了应对变化，把关于分页的封装成基类，其他关于排序或搜索的封装成继承该基类的子类。再把这些子类对象实例传递给服务层方法。

相关Model

    //显示表相关
    public class Customer
    {
        public int CustomerID { get; set; }
        public string CompanyName { get; set; }
        public string ContactName { get; set; }
        public string ContactTitle { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string Region { get; set; }
        public string Country { get; set; }
        public string Phone { get; set; }
        public string Fax { get; set; }
    }

    //关于分页封装成基类
    public class PageParam { public int PageSize { get; set; }
        public int PageIndex { get; set; }
    }

    //关于搜索或排序封装成子类
    public class CustomerParam : PageParam
    {
        public string SortProperty { get; set; }
        public bool Order { get; set; }
    }

服务层根据CustomerParam返回Customer集合，并返回一个输出总记录数

在进行分类的时候，用到了针对 IEnumerable<Customer>扩展方法OrderByWithDirection，如下：

using System.Linq;

namespace DataGridInMVC2.Helpers

    public static class SortExtension

        public static IOrderedEnumerable<TSource> OrderByWithDirection<TSource, TKey>(

            this IEnumerable<TSource> source,

            System.Func<TSource, TKey> keySelector,

            bool descending)

            return descending ? source.OrderByDescending(keySelector) : source.OrderBy(keySelector);

CustomerController

            //构建服务类方法所需要的参数实例
            var temp = new CustomerParam()
            {
                PageIndex = pageIndex,
                PageSize = pageSize,
                SortProperty = sortProperty,
                Order = order
            };

            var service = new Service();
            int totalNum = 0;
            var customers = service.LoadPageCustomers(temp, out totalNum);

            var result = from customer in customers
                select new
                {
                    customer.CustomerID,
                    customer.CompanyName,
                    customer.ContactName,
                    customer.ContactTitle,
                    customer.Country,
                    customer.Region,
                    customer.Address,
                    customer.Fax,
                    customer.Phone,
                    customer.City
                };

            var jsonResult = new {total = totalNum, rows = result};

            //序列化成json字符串
            string str = JsonSerializeHelper.SerializeToJson(jsonResult);
            return Content(str);
        }
    }
}

Customer/Index 视图

                width: 730,
                height: 400,
                title: 'Customer列表',
                fitColumns: true,
                rownumbers: true, //是否加行号
                pagination: true, //是否显式分页
                pageSize: 15, //页容量，必须和pageList对应起来，否则会报错
                pageNumber: 2, //默认显示第几页
                pageList: [15, 30, 45],//分页中下拉选项的数值
                columns: [[
                    //CustomerID,CompanyName,ContactName,ContactTitle,Country,Region,Address,Fax,Phone,City
                    { field: 'CustomerID', title: '编号',sortable: true },
                    { field: 'CompanyName', title: '客户名称', sortable: true },
                    { field: 'ContactName', title: '联系人名称', sortable: true },
                    { field: 'ContactTitle', title: '职位', sortable: true },
                    { field: 'Address', title: '地址', sortable: true },
                    { field: 'City', title: '城市名称', sortable: true },
                    { field: 'Region', title: '区域' },
                    { field: 'Country', title: '国家' },
                    { field: 'Phone', title: '电话', sortable: true },
                    { field: 'Fax', title: '传真', sortable: true }
                ]],
                queryParams: params, //搜索json对象
                sortName: 'CustomerID', //初始排序字段
                sortOrder: 'asc' //初始排序方式
            });
        }
    </script>
}

最终效果：

作者：darrenji