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