控制器:
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult LoadData()
{
var draw = Request.Form.GetValues("draw").FirstOrDefault();
var start = Request.Form.GetValues("start").FirstOrDefault();
var length = Request.Form.GetValues("length").FirstOrDefault();
var sortColumn = Request.Form.GetValues("columns[" + Request.Form.GetValues("order[0][column]").FirstOrDefault() + "][name]").FirstOrDefault();
var sortColumnDir = Request.Form.GetValues("order[0][dir]").FirstOrDefault();
int pageSize = length != null ? Convert.ToInt32(length) : 0;
int skip = start != null ? Convert.ToInt32(start) : 0;
int totalRecord = 0;
using (ACETeaEntities db = new ACETeaEntities())
{
var v = (from item in db.Drinks_Category select item);
if (!(string.IsNullOrEmpty(sortColumn) && string.IsNullOrEmpty(sortColumnDir)))
{
v = v.OrderBy(sortColumn + " " + sortColumnDir);
}
totalRecord = v.Count();
var data = v.Skip(skip).Take(pageSize).ToList();
return Json(new { draw = draw, recordsFilterd = totalRecord, recordsTotal = totalRecord, data = data }, JsonRequestBehavior.AllowGet);
}
}
}
查看:
<script src="~/Scripts/jquery-1.7.2.js" ></script>
<script src="~/Scripts/DataTables/jquery.dataTables.js" ></script>
<link rel="stylesheet" type="text/css" href="~/Content/DataTables/css/jquery.dataTables.css">
<script>
$(document).ready(function () {
$('#example').dataTable({
"processing": true,
"serverSide": true,
"filter": true,
"ordermulti": false,
"ajax": {
"url": "/Home/LoadData",
"type": "POST",
"dataType": "json"
},
"columns": [
{ "data": "Name_category", "autoWidth": true },
{ "data": "Id_category", "autoWidth": true },
{ "data": "Parent", "autoWidth": true }
]
});
});
</script>
<div style="margin:30px;">
<table id="example" class="display" cellspacing="0" width="100%">
<thead>
<tr style="text-align:left;">
<th>Id</th>
<th>Name</th>
<th>Parent</th>
</tr>
</thead>
<tfoot>
<tr style="text-align:left;">
</tr>
</tfoot>
</table>
</div>
我的代码错误在:v = v.OrderBy(sortColumn + " " + sortColumnDir);
有人可以帮我解决吗?
答案 0 :(得分:1)
使用OrderBy方法时,您需要将要排序的列作为属性传递,并使用不同的方法来定义方向
例如:
v = v.OrderBy(i => i.myColumn);
v = v.OrderByDescending(i => i.myColumn);
由于您将参数作为字符串获取,因此您有两个选择:
1)您可以在传递函数之前先构建函数,然后定义方向
例如:
if (sortColumn == "myColumn")
{
myOrderByFunc = i => i.myColumn;
}
elseif (sortColumn == "myOtherColumn")
{
myOrderByFunc = i => i.myOtherColumn;
}
if (direction == "asc")
{
v = v.OrderBy(myOrderByFunc);
}
elseif (direction == "desc")
{
v = v.OrderByDescending(myOrderByFunc);
}
2)您可以使用可用的System.Linq.Dynamic库here直接在linq查询中使用字符串(就像您现在所做的那样)
答案 1 :(得分:1)
请注意,您还可以尝试更新的库System.Linq.Dynamic.Core,它支持 OrderBy 以及 ThenBy 。