bool LoadRecord(LoadErrorHandlingMode errorHandlingMode)
{
if (!Visible)
{
return(true);
}
if (mDevice == null)
{
return(false);
}
mLoading = true;
FileStream stream = null;
bool watcherRaisesEvents = mDeviceFileWatcher.EnableRaisingEvents;
try
{
var record = (long)mRecordUpDown.Value;
if (watcherRaisesEvents)
{
mDeviceFileWatcher.EnableRaisingEvents = false;
}
stream = mOpenStream(mDevice.FilePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.Position = mCalculateBytePosition(record);
var readWords = mReadWords(stream, mDevice.RecordWordCount);
stream.Close();
mDeviceFileWatcher.EnableRaisingEvents |= watcherRaisesEvents;
stream = null;
for (int i = 0; i < readWords.Length; i++)
{
mRecordReadWords[i] = readWords[i];
mRecordEditWords[i].LongValue = readWords[i].LongValue;
}
ChangesPending = false;
mLastReadRecord = record;
mLastLoadTime = DateTime.Now;
mLoadRecordRetryCount = 0;
Update();
}
catch (Exception ex)
{
if (errorHandlingMode == LoadErrorHandlingMode.RetryOnError || (mLoadRecordRetryCount > 0 && mLoadRecordRetryCount <= maxLoadSectorRetryCount))
{
mDelayedIOOperation = LoadRecord;
mLoadRecordRetryCount++;
mIODelayTimer.Start();
return(false);
}
if (mLoadRecordRetryCount > maxLoadSectorRetryCount)
{
mDelayedIOOperation = null;
mLoadRecordRetryCount = 0;
return(false);
}
if (errorHandlingMode == LoadErrorHandlingMode.ReportAlways || mRecordUpDown.Value != mLastReadRecord)
{
MessageBox.Show(this, "Unable to load device data: " + ex.Message, "Error loading data", MessageBoxButtons.OK, MessageBoxIcon.Hand);
}
return(false);
}
finally
{
stream?.Close();
mDeviceFileWatcher.EnableRaisingEvents |= watcherRaisesEvents;
mLoading = false;
}
return(true);
}
bool LoadRecords(LoadErrorHandlingMode errorHandlingMode)
{
if (!Visible)
{
return(true);
}
if (Device == null)
{
return(false);
}
mLoading = true;
FileStream stream = null;
bool watcherRaisesEvents = mDeviceFileWatcher.EnableRaisingEvents;
try
{
mDeviceFileWatcher.EnableRaisingEvents &= !watcherRaisesEvents;
List <IMixByteCollection> readBytes = null;
if (File.Exists(Device.FilePath))
{
stream = mOpenStream(Device.FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
readBytes = mReadDeviceBytes(stream, mDeviceBytesPerRecord);
stream.Close();
}
else
{
readBytes = new List <IMixByteCollection>();
}
if (readBytes.Count == 0)
{
readBytes.Add(new MixByteCollection(mDeviceBytesPerRecord));
}
mDeviceFileWatcher.EnableRaisingEvents |= watcherRaisesEvents;
stream = null;
mReadBytes.Clear();
mEditBytes.Clear();
foreach (IMixByteCollection item in readBytes)
{
mReadBytes.Add(item);
mEditBytes.Add((IMixByteCollection)item.Clone());
}
SetDeviceRecordCount(mReadBytes.Count);
ChangesPending = false;
mLastLoadTime = DateTime.Now;
mLoadRetryCount = 0;
Update();
}
catch (Exception ex)
{
if (errorHandlingMode == LoadErrorHandlingMode.RetryOnError || (mLoadRetryCount > 0 && mLoadRetryCount <= maxLoadRetryCount))
{
mDelayedIOOperation = LoadRecords;
mLoadRetryCount++;
mIODelayTimer.Start();
return(false);
}
if (mLoadRetryCount > maxLoadRetryCount)
{
mDelayedIOOperation = null;
mLoadRetryCount = 0;
return(false);
}
MessageBox.Show(this, "Unable to load device data: " + ex.Message, "Error loading data", MessageBoxButtons.OK, MessageBoxIcon.Hand);
return(false);
}
finally
{
stream?.Close();
mDeviceFileWatcher.EnableRaisingEvents |= watcherRaisesEvents;
mLoading = false;
}
return(true);
}