asp.net mvc3 多个字段，怎么排序啊
，这有四个字段，要分别实现排序，

<div class="orderType">
                <ul>
                    <a href="#"><li class="current" id="defaultSort">默认排序</li></a> 
                    <a href="#"><li id="salerCredit">卖家信用</li></a> 
                    <a class="current" href="#"><li id="priceSort">价格</li></a> 
                    <a href="#"><li id="dateSort">最新发布</li></a>
                </ul>
            </div>

开始，我是想给他们分别，onclick事件，然后改变数据源的现实方式
var list from Model orderby 字段 select list
但是没有实现，各位帮帮忙。。。 asp.net mvc 排序 select class
[解决办法]

public static IQueryable<T> DataSorting<T>(IQueryable<T> source, string orderColumn, string sortDirection)
        {
            string sortingDir = string.Empty;
            if (sortDirection.ToUpper().Trim() == "ASC")
                sortingDir = "OrderBy";
            else if (sortDirection.ToUpper().Trim() == "DESC") 
 
                sortingDir = "OrderByDescending";
            ParameterExpression param = Expression.Parameter(typeof(T), orderColumn);
            PropertyInfo pi = typeof(T).GetProperty(orderColumn);
            Type[] types = new Type[2];
            types[0] = typeof(T);
            types[1] = pi.PropertyType;
            Expression expr = Expression.Call(typeof(Queryable), sortingDir, types, source.Expression, Expression.Lambda(Expression.Property(param, orderColumn), param));
            IQueryable<T> query = source.AsQueryable().Provider.CreateQuery<T>(expr);
            return query;
        }

var q = from a in tab1;
q=DataSorting<model>(q,"id","DESC");