internal int CompareTo(SortComparer value)
{
// we shouldn't get to this point
if (value == null)
throw new ArgumentNullException("value");
if (value.ObjectArray.Length != base.ObjectArray.Length)
throw new InvalidOperationException();
int compare = 0;
for (int index = 0; index < base.ObjectArray.Length; index++)
{
object leftValue = base.ObjectArray[index];
object rightValue = value.ObjectArray[index];
// Indizes sind hier deckungsgleich
SortColumn sortColumn = (SortColumn)base.ColumnCollection[index];
bool descending = (sortColumn.SortDirection == ListSortDirection.Descending);
// null means equl
if (leftValue == null || leftValue == System.DBNull.Value)
{
if (rightValue != null && rightValue != System.DBNull.Value)
{
return (descending) ? 1 : -1;
}
// Beide Null
continue;
}
if (rightValue == null || rightValue == System.DBNull.Value)
{
return (descending) ? -1 : 1;
}
if (leftValue.GetType() != rightValue.GetType()){
string s = String.Format(CultureInfo.CurrentCulture,
"{0} {1} {2}",this.GetType().ToString(),
leftValue.GetType().ToString(),
rightValue.GetType().ToString());
throw new ArgumentException(s);
}
if (leftValue.GetType() == typeof(string))
{
compare = String.Compare((string)leftValue, (string)rightValue,
!sortColumn.CaseSensitive, CultureInfo.CurrentCulture);
}
else
{
compare = ((IComparable)leftValue).CompareTo(rightValue);
}
// Sind ungleich, tauschen je nach Richtung
if (compare != 0)
{
return (descending) ? -compare : compare;
}
}
// Gleich Werte, dann Index bercksichtigen
return this.ListIndex.CompareTo(value.ListIndex);
}
internal int CompareTo(SortComparer value)
{
// we shouldn't get to this point
if (value == null)
{
throw new ArgumentNullException("value");
}
if (value.ObjectArray.Length != base.ObjectArray.Length)
{
throw new InvalidOperationException();
}
int compare = 0;
for (int index = 0; index < base.ObjectArray.Length; index++)
{
object leftValue = base.ObjectArray[index];
object rightValue = value.ObjectArray[index];
// Indizes sind hier deckungsgleich
SortColumn sortColumn = (SortColumn)base.ColumnCollection[index];
bool descending = (sortColumn.SortDirection == ListSortDirection.Descending);
// null means equl
if (leftValue == null || leftValue == System.DBNull.Value)
{
if (rightValue != null && rightValue != System.DBNull.Value)
{
return((descending) ? 1 : -1);
}
// Beide Null
continue;
}
if (rightValue == null || rightValue == System.DBNull.Value)
{
return((descending) ? -1 : 1);
}
if (leftValue.GetType() != rightValue.GetType())
{
string s = String.Format(CultureInfo.CurrentCulture,
"{0} {1} {2}", this.GetType().ToString(),
leftValue.GetType().ToString(),
rightValue.GetType().ToString());
throw new ArgumentException(s);
}
if (leftValue.GetType() == typeof(string))
{
compare = String.Compare((string)leftValue, (string)rightValue,
!sortColumn.CaseSensitive, CultureInfo.CurrentCulture);
}
else
{
compare = ((IComparable)leftValue).CompareTo(rightValue);
}
// Sind ungleich, tauschen je nach Richtung
if (compare != 0)
{
return((descending) ? -compare : compare);
}
}
// Gleich Werte, dann Index bercksichtigen
return(this.ListIndex.CompareTo(value.ListIndex));
}