81 lines
2.7 KiB
C#
81 lines
2.7 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
|
|
using BS.Shared.DataContracts;
|
|
|
|
namespace BeWo.Core
|
|
{
|
|
public abstract class AbstractSorter
|
|
{
|
|
public enum SortDirection
|
|
{
|
|
Ascending,
|
|
Descending
|
|
}
|
|
|
|
public abstract List<SortItem> SortItems { get; }
|
|
|
|
// abstract public Comparison<T> GetComparison(SortItem item);
|
|
public virtual Comparison<IFilterableDC> GetComparison(string sortProperty, SortDirection direction)
|
|
{
|
|
return this.GetComparison(new SortItem(sortProperty, sortProperty), direction);
|
|
}
|
|
|
|
public virtual Comparison<IFilterableDC> GetComparison(SortItem item, SortDirection direction)
|
|
{
|
|
return (x, y) =>
|
|
{
|
|
int mult = direction == SortDirection.Ascending ? 1 : -1;
|
|
|
|
object xValue = GetPropertyValue(x, item.Property);
|
|
object yValue = GetPropertyValue(y, item.Property);
|
|
|
|
if (xValue != null && yValue != null)
|
|
{
|
|
if (xValue is DateTime && yValue is DateTime)
|
|
{
|
|
DateTime? xValueDT = xValue as DateTime?;
|
|
DateTime? yValueDT = yValue as DateTime?;
|
|
|
|
return mult * xValueDT.Value.CompareTo(yValueDT.Value);
|
|
}
|
|
else
|
|
{
|
|
if (item.Property == "PersonnelNumber") //HACK
|
|
{
|
|
int xint = 0;
|
|
int yint = 0;
|
|
if (Int32.TryParse(xValue.ToString(), out xint) && Int32.TryParse(yValue.ToString(), out yint))
|
|
{
|
|
return mult * xint.CompareTo(yint);
|
|
}
|
|
}
|
|
|
|
return mult * xValue.ToString().CompareTo(yValue.ToString());
|
|
}
|
|
}
|
|
else if (xValue != null || yValue != null)
|
|
{
|
|
if (xValue != null)
|
|
return mult*xValue.ToString().CompareTo("");
|
|
else
|
|
return mult * "".CompareTo(yValue.ToString());
|
|
}
|
|
return 0;
|
|
};
|
|
}
|
|
|
|
private object GetPropertyValue(object obj, String propertyName)
|
|
{
|
|
var prop = obj.GetType().GetProperty(propertyName);
|
|
if (prop != null)
|
|
{
|
|
return prop.GetValue(obj, null);
|
|
}
|
|
var field = obj.GetType().GetField(propertyName);
|
|
if (field != null)
|
|
return field.GetValue(obj);
|
|
return null;
|
|
}
|
|
}
|
|
} |