/// <summary>
/// 处理一列信息
/// </summary>
private ProcessCellDataException ProcessCellData(T item, DataRowWrapper dataWrapper, ReadExcelColumn <T> column)
{
ProcessCellDataException error = null;
if (column.CustomDelegate != null)
{//自定义获取信息，优先级最高
error = WrapperException(String.Format("读取第 [{0}] 行信息错误。", dataWrapper.RowIndex + 1), () => column.CustomDelegate(item, dataWrapper));
}
else
{
String data = null;
if (!String.IsNullOrEmpty(column.ColumnName))
{//信息列名称获取信息优先级大于信息索引
error = WrapperException(String.Format("读取第 [{0}] 行，[{1}] 列单元格信息错误。", dataWrapper.RowIndex + 1, column.ColumnName),
() => data = dataWrapper[column.ColumnName]);
if (null == error)
{//转换信息
error = WrapperException(String.Format("读取第 [{0}] 行，[{1}] 列单元格信息错误。", dataWrapper.RowIndex + 1, column.ColumnName),
() => column.CustomEvaluater(item, data));
}
}
else
{
error = WrapperException(String.Format("读取第 [{0}] 行，第 [{1}] 列单元格信息错误。", dataWrapper.RowIndex + 1, column.ColumnIndex + 1),
() => data = dataWrapper[column.ColumnIndex]);
if (null == error)
{//转换信息
error = WrapperException(String.Format("读取第 [{0}] 行，第 [{1}] 列单元格信息错误。", dataWrapper.RowIndex + 1, column.ColumnIndex + 1),
() => column.CustomEvaluater(item, data));
}
}
}
return(error);
}
public List <T> ReadDataTable(DataTable sheetTable, ReadExcelColumnBuilder <T> columns, Func <T> createInstance)
{
if (sheetTable == null)
{
throw new SheetTableNullException("工作表中不存在数据");
}
//校验信息列
this.ValidateColumns(columns, sheetTable, "");
List <T> items = new List <T>(sheetTable.Rows.Count);
//循环读取每行Excel信息
for (Int32 rowIndex = 0; rowIndex < sheetTable.Rows.Count; rowIndex++)
{
DataRow row = sheetTable.Rows[rowIndex];
T item = this.CreateInstance(createInstance);
//该行数据为空
if (row.ItemArray.Where(e => null == e).Count() == row.ItemArray.Length)
{
continue;
}
using (DataRowWrapper dataWrapper = new DataRowWrapper(row, rowIndex))
{
foreach (var column in columns)
{
ProcessCellDataException error = this.ProcessCellData(item, dataWrapper, column);
if (null != error)
{//保存错误信息
throw error;
}
}
}
items.Add(item);
}
return(items);
}
