/// <summary>
/// Writes the list of records to the CSV file.
/// </summary>
/// <typeparam name="T">The type of the record.</typeparam>
/// <param name="records">The list of records to write.</param>
public virtual void WriteRecords <T>(IEnumerable <T> records) where T : class
{
CheckDisposed();
if (configuration.HasHeaderRecord)
{
WriteHeader <T>();
}
foreach (var record in records)
{
try
{
GetWriteRecordAction <T>()(record);
}
catch (Exception ex)
{
ExceptionHelper.AddExceptionDataMessage(ex, null, typeof(T), null, null, null);
throw;
}
NextRecord();
}
}
/// <summary>
/// Writes the list of records to the CSV file.
/// </summary>
/// <param name="records">The list of records to write.</param>
public virtual void WriteRecords <T>(IEnumerable <T> records)
{
Type recordType = null;
try
{
// Write the header. If records is a List<dynamic>, the header won't be written.
// This is because typeof( T ) = Object.
var genericEnumerable = records.GetType().GetInterfaces().FirstOrDefault(t => t.GetTypeInfo().IsGenericType&& t.GetGenericTypeDefinition() == typeof(IEnumerable <>));
if (genericEnumerable != null)
{
recordType = genericEnumerable.GetGenericArguments().Single();
var isPrimitive = recordType.GetTypeInfo().IsPrimitive;
if (context.WriterConfiguration.HasHeaderRecord && !context.HasHeaderBeenWritten && !isPrimitive && recordType != typeof(object))
{
WriteHeader(recordType);
if (context.HasHeaderBeenWritten)
{
NextRecord();
}
}
}
foreach (var record in records)
{
recordType = record.GetType();
if (record is IDynamicMetaObjectProvider dynamicObject)
{
if (context.WriterConfiguration.HasHeaderRecord && !context.HasHeaderBeenWritten)
{
WriteDynamicHeader(dynamicObject);
NextRecord();
}
}
else
{
// If records is a List<dynamic>, the header hasn't been written yet.
// Write the header based on the record type.
var isPrimitive = recordType.GetTypeInfo().IsPrimitive;
if (context.WriterConfiguration.HasHeaderRecord && !context.HasHeaderBeenWritten && !isPrimitive)
{
WriteHeader(recordType);
NextRecord();
}
}
try
{
GetWriteRecordAction(record)(record);
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
NextRecord();
}
}
catch (Exception ex)
{
throw ex as CsvHelperException ?? new WriterException(context, "An unexpected error occurred.", ex);
}
}