/// <include file='FileHelperAsyncEngine.docs.xml' path='doc/BeginReadStream/*'/>
public void BeginReadStream(TextReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader", "The TextReader can´t be null.");
}
if (mAsyncWriter != null)
{
throw new BadUsageException("You can't start to read while you are writing.");
}
NewLineDelimitedRecordReader recordReader = new NewLineDelimitedRecordReader(reader);
ResetFields();
mHeaderText = String.Empty;
mFooterText = String.Empty;
if (mRecordInfo.mIgnoreFirst > 0)
{
for (int i = 0; i < mRecordInfo.mIgnoreFirst; i++)
{
string temp = recordReader.ReadRecord();
mLineNumber++;
if (temp != null)
{
mHeaderText += temp + StringHelper.NewLine;
}
else
{
break;
}
}
}
mAsyncReader = new ForwardReader(recordReader, mRecordInfo.mIgnoreLast, mLineNumber);
mAsyncReader.DiscardForward = true;
mState = EngineState.Reading;
}
private T[] ReadStream(TextReader reader, int maxRecords, DataTable dt)
#endif
{
#endif
if (reader == null)
{
throw new ArgumentNullException("reader", "The reader of the Stream can´t be null");
}
NewLineDelimitedRecordReader recordReader = new NewLineDelimitedRecordReader(reader);
ResetFields();
mHeaderText = String.Empty;
mFooterText = String.Empty;
ArrayList resArray = new ArrayList();
int currentRecord = 0;
using (ForwardReader freader = new ForwardReader(recordReader, mRecordInfo.mIgnoreLast))
{
freader.DiscardForward = true;
string currentLine, completeLine;
mLineNumber = 1;
completeLine = freader.ReadNextLine();
currentLine = completeLine;
#if !MINI
ProgressHelper.Notify(mNotifyHandler, mProgressMode, 0, -1);
#endif
if (mRecordInfo.mIgnoreFirst > 0)
{
for (int i = 0; i < mRecordInfo.mIgnoreFirst && currentLine != null; i++)
{
mHeaderText += currentLine + StringHelper.NewLine;
currentLine = freader.ReadNextLine();
mLineNumber++;
}
}
bool byPass = false;
if (maxRecords < 0)
{
maxRecords = int.MaxValue;
}
LineInfo line = new LineInfo(currentLine);
line.mReader = freader;
object[] values = new object[mRecordInfo.mFieldCount];
while (currentLine != null && currentRecord < maxRecords)
{
try
{
mTotalRecords++;
currentRecord++;
line.ReLoad(currentLine);
bool skip = false;
#if !MINI
ProgressHelper.Notify(mNotifyHandler, mProgressMode, currentRecord, -1);
#if !GENERICS
BeforeReadRecordEventArgs e = new BeforeReadRecordEventArgs(currentLine, LineNumber);
#else
BeforeReadRecordEventArgs <T> e = new BeforeReadRecordEventArgs <T>(currentLine, LineNumber);
#endif
skip = OnBeforeReadRecord(e);
if (e.RecordLineChanged)
{
line.ReLoad(e.RecordLine);
}
#endif
if (skip == false)
{
object record = mRecordInfo.StringToRecord(line, values);
#if !MINI
#if !GENERICS
skip = OnAfterReadRecord(currentLine, record);
#else
skip = OnAfterReadRecord(currentLine, (T)record);
#endif
#endif
if (skip == false && record != null)
{
#if MINI
resArray.Add(record);
#else
if (dt == null)
{
resArray.Add(record);
}
else
{
dt.Rows.Add(mRecordInfo.RecordToValues(record));
}
#endif
}
}
}
catch (Exception ex)
{
switch (mErrorManager.ErrorMode)
{
case ErrorMode.ThrowException:
byPass = true;
throw;
case ErrorMode.IgnoreAndContinue:
break;
case ErrorMode.SaveAndContinue:
ErrorInfo err = new ErrorInfo();
err.mLineNumber = freader.LineNumber;
err.mExceptionInfo = ex;
// err.mColumnNumber = mColumnNum;
err.mRecordString = completeLine;
mErrorManager.AddError(err);
break;
}
}
finally
{
if (byPass == false)
{
currentLine = freader.ReadNextLine();
completeLine = currentLine;
mLineNumber++;
}
}
}
if (mRecordInfo.mIgnoreLast > 0)
{
mFooterText = freader.RemainingText;
}
}
#if !GENERICS
return((object[])
#else
return (T[])
#endif
resArray.ToArray(RecordType));
}
