ASP.Net MVC Data Table实现分页 排序功能的方法

本文实例讲述了ASP。Net MVC+Data Table实现分页+排序功能的方法。分享给大家供大家参考，具体如下：实现思路：使用datatable内置的分页，排序
使用attribute+反射来控制需要排序和显示的字段以及顺序
分离排序和显示逻辑
若要添加搜索逻辑只需要传递搜索的字段到后端即可(js初始化时把”searching”: false拿掉)。
View :@using BCMS。BusinessLogic@using BCMS。BusinessLogic。Models@model List<BusCaptainObj><table>DisplayNameFor(model => model。First()。PersNo)</th> <th>First()。Personnel_Name)</th> <th>DisplayNameFor(model => model。First()。Interchange)</th> <th>DisplayColumns<BusCaptainObj>(); } $(document)。ready(function () { $(‘#tblData’)。dataTable({ “processing”: true, “serverSide”: true, “searching”: false, “stateSave”: true, “oLanguage”: { “sInfoFiltered”: “” }, “ajax”: { “url”: @Url。
Action(“GetJsonData”), “type”: “GET” }, “columns”: [ { “data”: “@columns[0]” }, { “data”: “@columns[1]” }, { “data”: “@columns[2]” }, { “data”: “@columns[3]” }, { “data”: “@columns[0]”, “orderable”: false, “searchable”: false, “render”: function (data, type, full, meta) { if (type === ‘display’) { return GetDetailButton(“/BusCaptain/Detail?bcId=”, data) + GetInfoButton(“/Telematics?bcId=”, data, “Performance”); } else { return data; } } } ], “order”: [[0, “asc”]] }); }); </script>}Controller :public ActionResult GetJsonData(int draw, int start, int length){ string search = Request。
QueryString[DataTableQueryString。Searching]; string sortColumn = “”; string sortDirection = “asc”; if (Request。QueryString[DataTableQueryString。
OrderingColumn] != null) { sortColumn = GetSortColumn(Request。QueryString[DataTableQueryString。OrderingColumn]); } if (Request。
QueryString[DataTableQueryString。OrderingDir] != null) { sortDirection = Request。QueryString[DataTableQueryString。OrderingDir]; } DataTableData dataTableData = new DataTableData(); dataTableData。
draw = draw; int recordsFiltered = 0; dataTableData。data = BusCaptainService。Instance。SearchMyBuscaptains(User。Identity。Name, out recordsFiltered, start, length, sortColumn, sortDirection, search)。
Data; dataTableData。recordsFiltered = recordsFiltered; return Json(dataTableData, JsonRequestBehavior。AllowGet);}public string GetSortColumn(string sortColumnNo){ var name = DataTableHelper。
SoringColumnName<BusCaptainObj>(sortColumnNo); return name;}public class DataTableData{ public int draw { get; set; } public int recordsFiltered { get; set; } public List<BusCaptainObj> data { get; set; }}Model :class XXX{。
[DisplayColumn(0)] [SortingColumn(0)] public int? A { get; set; } [DisplayColumn(1)] [SortingColumn(1)] public string B { get; set; }。
}Helper class :public class SortingColumnAttribute : Attribute{ public int Index { get; } public SortingColumnAttribute(int index) { Index = index; }}public class DisplayColumnAttribute : Attribute{ public int Index { get; } public DisplayColumnAttribute(int index) { Index = index; }}public static class DataTableQueryString{ public static string OrderingColumn = “order[0][column]”; public static string OrderingDir = “order[0][dir]”; public static string Searching = “search[value]”;}public static class DataTableHelper{ public static IList<string> DisplayColumns<T>() { var result = new Dictionary<int, string>(); var props = typeof(T)。
GetProperties(); foreach (var propertyInfo in props) { var propAttr = propertyInfo 。GetCustomAttributes(false) 。OfType<DisplayColumnAttribute>() 。
FirstOrDefault(); if (propAttr != null) { result。Add(propAttr。Index,propertyInfo。Name); } } return result。OrderBy(x => x。
Key)。Select(x => x。Value)。ToList(); } public static string SoringColumnName<T>(string columnIndex) { int index; if (!int。
TryParse(columnIndex, out index)) { throw new ArgumentOutOfRangeException(); } return SoringColumnName<T>(index); } public static string SoringColumnName<T>(int index) { var props = typeof(T)。
GetProperties(); foreach (var propertyInfo in props) { var propAttr = propertyInfo 。GetCustomAttributes(false) 。OfType<SortingColumnAttribute>() 。
FirstOrDefault(); if (propAttr != null && propAttr。Index == index) { return propertyInfo。Name; } } return “”; }}Query：。var query = context。
BusCaptains 。Where(x => 。) 。OrderByEx(sortDirection, sortField) 。Skip(start) 。Take(pageSize);LINQ Helper :。public static IQueryable<T> OrderByEx<T>(this IQueryable<T> q, string direction, string fieldName) { try { var customProperty = typeof(T)。
GetCustomAttributes(false)。OfType<ColumnAttribute>()。FirstOrDefault(); if (customProperty != null) { fieldName = customProperty。
Name; } var param = Expression。Parameter(typeof(T), “p”); var prop = Expression。Property(param, fieldName); var exp = Expression。
Lambda(prop, param); string method = direction。ToLower() == “asc” ? “OrderBy” : “OrderByDescending”; Type[] types = new Type[] {q。
ElementType, exp。Body。Type}; var mce = Expression。Call(typeof(Queryable), method, types, q。Expression, exp); return q。Provider。
CreateQuery<T>(mce); } catch (Exception ex) { _log。ErrorFormat(“error form OrderByEx。”); _log。Error(ex); throw ; } }。