public ConvertToListOptions <T> MapColumn(string columnName, PropertyInfo propertyInfo, Delegate projection = null)
{
if (!ColumnMapper.ContainsKey(columnName))
{
ColumnMapper.Add(columnName, propertyInfo);
if (projection != null)
{
Projection.Add(columnName, projection);
}
return(this);
}
else
{
throw new MappingException("列名【" + columnName + "】重复配置");
}
}