如何通过double值对List 进行排序?
这听起来很简单但不是那么多。
我想根据T的一个属性订购一个List,它是双重类型。
如果您在编译之前知道属性名称:
myList = myList.OrderBy(a=>a.propertyName).ToList();
要么
myList = (from m in myList order by m.propertyName).ToList();
如果在编译时没有属性(例如在网格中进行动态排序等); 尝试以下扩展方法:
static class OrderByExtender { public static IOrderedEnumerable OrderBy (this IEnumerable collection, string key, string direction) { LambdaExpression sortLambda = BuildLambda (key); if(direction.ToUpper() == "ASC") return collection.OrderBy((Func)sortLambda.Compile()); else return collection.OrderByDescending((Func)sortLambda.Compile()); } public static IOrderedEnumerable ThenBy (this IOrderedEnumerable collection, string key, string direction) { LambdaExpression sortLambda = BuildLambda (key); if (direction.ToUpper() == "ASC") return collection.ThenBy((Func)sortLambda.Compile()); else return collection.ThenByDescending((Func)sortLambda.Compile()); } private static LambdaExpression BuildLambda (string key) { ParameterExpression TParameterExpression = Expression.Parameter(typeof(T), "p"); LambdaExpression sortLambda = Expression.Lambda(Expression.Convert(Expression.Property(TParameterExpression, key), typeof(object)), TParameterExpression); return sortLambda; } }
那顺序就好
myList = myList.OrderBy("propertyName", "ASC").ToList();
var list = (from t in list orderby t.doubleVal).ToList();
我认为这可以解决问题:
List list = new List (); //fill list here list.OrderBy(item => item.DoubleTypeProperty).ToList();
HTH