public IEnumerable <DataPropertyDescriptor> GetItemProperties(IEnumerable <RowItem> rowItems)
{
var columnNames = new HashSet <string>();
var propertyDescriptors = new List <DataPropertyDescriptor>();
var pivotDisplayColumns = new Dictionary <PivotKey, List <DisplayColumn> >();
var rowItemsArray = rowItems as RowItem[] ?? rowItems.ToArray();
foreach (var displayColumn in ViewInfo.DisplayColumns)
{
if (displayColumn.ColumnSpec.Hidden)
{
continue;
}
var pivotColumn = PivotColumns.LastOrDefault(pc => displayColumn.PropertyPath.StartsWith(pc.PropertyPath));
ICollection <PivotKey> pivotKeys = null;
if (pivotColumn != null)
{
pivotKeys = GetPivotKeys(pivotColumn.PropertyPath, rowItemsArray);
}
if (pivotKeys == null)
{
propertyDescriptors.Add(new ColumnPropertyDescriptor(displayColumn, MakeUniqueName(columnNames, displayColumn.PropertyPath)));
continue;
}
foreach (var value in pivotKeys)
{
List <DisplayColumn> columns;
if (!pivotDisplayColumns.TryGetValue(value, out columns))
{
columns = new List <DisplayColumn>();
pivotDisplayColumns.Add(value, columns);
}
columns.Add(displayColumn);
}
}
var allPivotKeys = pivotDisplayColumns.Keys.ToArray();
Array.Sort(allPivotKeys, PivotKey.GetComparer(ViewInfo.DataSchema));
foreach (var pivotKey in allPivotKeys)
{
foreach (var pivotColumn in pivotDisplayColumns[pivotKey])
{
var qualifiedPropertyPath = PivotKey.QualifyPropertyPath(pivotKey, pivotColumn.PropertyPath);
var columnName = MakeUniqueName(columnNames, qualifiedPropertyPath);
propertyDescriptors.Add(new ColumnPropertyDescriptor(pivotColumn, columnName, qualifiedPropertyPath, pivotKey));
}
}
return(propertyDescriptors);
}
