public virtual int CompareTo(Column column, IFolderObject obj)
{
// get the values for this item and the other item in the
// specified column
object value1 = GetColumnValue(column);
object value2 = obj.GetColumnValue(column);
if (column != null && column.Comparer != null)
{
// the column provides a comparer
return(column.Comparer.Compare(value1, value2));
}
else if (value1 == null && value2 != null)
{
return(1); // sort empty column values to the bottom
}
else if (value2 == null && value1 != null)
{
return(-1); // sort empty column values to the bottom
}
else if (value1 == null && value2 == null ||
!(value1 is IComparable && value2 is IComparable))
{
// compare the display names as a last resort
return(GetDisplayName(NameOptions.Normal).CompareTo(obj.GetDisplayName(NameOptions.Normal)));
}
else
{
// the values implement IComparable, so work with that;
// hopefully the values are compatible
return(((IComparable)value1).CompareTo(value2));
}
}
public int GetInfoTip(QITIPF dwFlags, out string ppwszTip)
{
string sValues = string.Empty;
foreach (Column column in _folderObj.Columns)
{
sValues += string.Format("{0}: {1}\r\n", column.Name, _folderObj.GetColumnValue(column));
}
sValues = sValues.TrimEnd('\n');
sValues = sValues.TrimEnd('\r');
ppwszTip = sValues;
return(WinError.S_OK);
}