public static void ChangeOrder(IEnumerable data, ListOrderItem target, bool increase)
{
var data2 = data.Cast <ListOrderItem>();
if (increase)
{
var upper = data2.Where(p => p.OrderNo > target.OrderNo).OrderBy(p => p.OrderNo);
if (upper.Any())
{
var upperItem = upper.First();
int tempOrder = target.OrderNo;
target.OrderNo = upperItem.OrderNo;
upperItem.OrderNo = tempOrder;
}
}
else
{
var lower = data2.Where(p => p.OrderNo < target.OrderNo).OrderByDescending(p => p.OrderNo);
if (lower.Any())
{
var lowerItem = lower.First();
int tempOrder = target.OrderNo;
target.OrderNo = lowerItem.OrderNo;
lowerItem.OrderNo = tempOrder;
}
}
}
public static void MoveToBottom(IEnumerable data, ListOrderItem target)
{
var data2 = data.Cast <ListOrderItem>();
int orderNo = target.OrderNo;
foreach (ListOrderItem item in data2.Where(p => p.OrderNo >= target.OrderNo).OrderBy(a => a.OrderNo).ToArray())
{
item.OrderNo = orderNo++;
}
target.OrderNo = orderNo;
}
