private IEnumerable<RowInfo<T>> Take<T>(ISheet sheet, int maxErrorRows, Func<T> objectInitializer = null) where T : class
{
if (sheet == null || sheet.PhysicalNumberOfRows < 1)
{
yield break;
}
var firstRowIndex = GetFirstRowIndex(sheet);
var firstRow = sheet.GetRow(firstRowIndex);
var targetType = typeof(T);
if (targetType == typeof(object)) // Dynamic type.
{
targetType = GetDynamicType(sheet);
MapHelper.LoadDynamicAttributes(Attributes, DynamicAttributes, targetType);
}
// Scan object attributes.
MapHelper.LoadAttributes(Attributes, targetType);
// Read the first row to get column information.
var columns = GetColumns(firstRow, targetType);
// Detect column format based on the first non-null cell.
Helper.LoadDataFormats(sheet, HasHeader ? firstRowIndex + 1 : firstRowIndex, columns, TypeFormats);
if (TrackObjects) Objects[sheet.SheetName] = new Dictionary<int, object>();
// Loop rows in file. Generate one target object for each row.
var errorCount = 0;
var firstDataRowIndex = HasHeader ? firstRowIndex + 1 : firstRowIndex;
foreach (IRow row in sheet)
{
if (maxErrorRows > 0 && errorCount >= maxErrorRows) break;
if (row.RowNum < firstDataRowIndex) continue;
var obj = objectInitializer == null ? Activator.CreateInstance(targetType) : objectInitializer();
var rowInfo = new RowInfo<T>(row.RowNum, obj as T, -1, string.Empty);
LoadRowData(columns, row, obj, rowInfo);
if (rowInfo.ErrorColumnIndex >= 0)
{
errorCount++;
//rowInfo.Value = default(T);
}
if (TrackObjects) Objects[sheet.SheetName][row.RowNum] = rowInfo.Value;
yield return rowInfo;
}
}