public int Compare(RawItem xRawItem, RawItem yRawItem)
{
if (xRawItem == null)
{
if (yRawItem == null)
{
return(0);
}
else
{
return(-1);
}
}
else
{
if (yRawItem == null)
{
return(1);
}
}
ListSortDirection lastSortDirection = ListSortDirection.Ascending;
SortDescriptionCollection sortDescriptions = m_collectionView.SortDescriptions;
int sortDescriptionCount = sortDescriptions.Count;
if (sortDescriptionCount > 0)
{
int result;
DataGridItemPropertyCollection itemProperties = m_collectionView.ItemProperties;
for (int i = 0; i < sortDescriptionCount; i++)
{
SortDescription sortDescription = sortDescriptions[i];
lastSortDirection = sortDescription.Direction;
DataGridItemPropertyBase dataProperty = itemProperties[sortDescription.PropertyName];
if (dataProperty == null)
{
continue;
}
ISupportInitialize supportInitialize = dataProperty as ISupportInitialize;
object xData = null;
object yData = null;
if (supportInitialize != null)
{
supportInitialize.BeginInit();
}
try
{
xData = dataProperty.GetValue(xRawItem.DataItem);
yData = dataProperty.GetValue(yRawItem.DataItem);
}
finally
{
if (supportInitialize != null)
{
supportInitialize.EndInit();
}
}
IComparer sortComparer = dataProperty.SortComparer;
if (sortComparer != null)
{
result = sortComparer.Compare(xData, yData);
}
else
{
result = ObjectDataStore.CompareData(xData, yData);
}
if (result != 0)
{
if (lastSortDirection == ListSortDirection.Descending)
{
result = -result;
}
return(result);
}
}
}
if (lastSortDirection == ListSortDirection.Descending)
{
return(yRawItem.Index - xRawItem.Index);
}
return(xRawItem.Index - yRawItem.Index);
}
public int Compare(RawItem xRawItem, RawItem yRawItem)
{
if (xRawItem == null)
{
return((yRawItem == null) ? 0 : -1);
}
if (yRawItem == null)
{
return(1);
}
var lastSortDirection = ListSortDirection.Ascending;
var sortDescriptions = m_collectionView.SortDescriptions;
var sortDescriptionCount = sortDescriptions.Count;
if (sortDescriptionCount > 0)
{
var result = default(int);
var itemProperties = m_collectionView.ItemProperties;
for (int i = 0; i < sortDescriptionCount; i++)
{
var sortDescription = sortDescriptions[i];
lastSortDirection = sortDescription.Direction;
var itemProperty = ItemsSourceHelper.GetItemPropertyFromProperty(itemProperties, sortDescription.PropertyName);
if (itemProperty == null)
{
continue;
}
var supportInitialize = itemProperty as ISupportInitialize;
var xData = default(object);
var yData = default(object);
if (supportInitialize != null)
{
supportInitialize.BeginInit();
}
try
{
xData = ItemsSourceHelper.GetValueFromItemProperty(itemProperty, xRawItem.DataItem);
yData = ItemsSourceHelper.GetValueFromItemProperty(itemProperty, yRawItem.DataItem);
if (itemProperty.IsSortingOnForeignKeyDescription)
{
var foreignKeyDescription = itemProperty.ForeignKeyDescription;
xData = foreignKeyDescription.GetDisplayValue(xData);
yData = foreignKeyDescription.GetDisplayValue(yData);
}
}
finally
{
if (supportInitialize != null)
{
supportInitialize.EndInit();
}
}
var sortComparer = itemProperty.SortComparer;
if (sortComparer != null)
{
result = sortComparer.Compare(xData, yData);
}
else
{
result = ObjectDataStore.CompareData(xData, yData);
}
if (result != 0)
{
if (lastSortDirection == ListSortDirection.Descending)
{
return(-result);
}
return(result);
}
}
}
if (lastSortDirection == ListSortDirection.Descending)
{
return(yRawItem.Index - xRawItem.Index);
}
return(xRawItem.Index - yRawItem.Index);
}
