/// <summary>
/// Returns an object filled with values from the given CSV row. Properties of T have to have CsvFieldAttributes for mapping to work
/// </summary>
private T GetRecord <T>(Dictionary <string, CsvPropertyMap> propertyMap, int rowNumber, string[] csvRow)
where T : ICsvRow, new()
{
T obj = new T()
{
RowNumber = rowNumber
};
if (propertyMap.Count > csvRow.Length)
{
throw new Exception(MissingElementsMessage(csvRow.Length, propertyMap.Count));
}
CsvPropertyMap propertyWithMaxIndex = propertyMap.Values.OrderByDescending(x => x.Index).First();
if (propertyWithMaxIndex.Index >= csvRow.Length)
{
throw new Exception(InvalidIndexMappingMessage(propertyWithMaxIndex));
}
foreach (KeyValuePair <string, CsvPropertyMap> item in propertyMap)
{
var inputValue = csvRow[item.Value.Index];
if (!string.IsNullOrWhiteSpace(inputValue))
{
// convert string to proper value type eg. int
object value = GetValueFromString(item.Key, item.Value.PropertyType, csvRow[item.Value.Index], rowNumber);
obj.GetType().GetProperty(item.Key).SetValue(obj, value);
}
}
return(obj);
}
/// <summary>
/// Returns a dictionary with values from property attributes - key is the Property Name
/// </summary>
private static Dictionary <string, CsvPropertyMap> GetPropertyMappingConfig <T>()
{
var mapping = new Dictionary <string, CsvPropertyMap>();
PropertyInfo[] props = typeof(T).GetProperties();
foreach (PropertyInfo prop in props)
{
CsvFieldAttribute csvAttr = prop.GetCustomAttribute <CsvFieldAttribute>(false);
if (csvAttr != null)
{
var cfg = new CsvPropertyMap(csvAttr.Index, csvAttr.ColumnName ?? prop.Name, prop.Name, prop.PropertyType);
mapping.Add(prop.Name, cfg);
}
}
ValidatePropertyMappingConfig <T>(mapping);
return(mapping);
}
private static string InvalidIndexMappingMessage(CsvPropertyMap property) => $"missing value of '{property.ColumnName}' with index '{property.Index}'.";
