/// <summary>
/// [可重入]取消后台操作
/// </summary>
/// <param name="bw"></param>
public static void CancelAsync(System.ComponentModel.BackgroundWorker bw)
{
if (bw.IsBusy && !bw.CancellationPending)
{
bw.CancelAsync();
}
}
/// <summary>
/// This method checks the given <see cref="AOIData"/>
/// if it is already used in the database.
/// </summary>
/// <param name="shape">Ref. A <see cref="AOIData"/> with
/// the area of interest to test.</param>
/// <param name="splashDialog">A <see cref="System.ComponentModel.BackgroundWorker"/> with the
/// background splash loading dialog worker which shows progress.</param>
/// <returns><strong>True</strong>, if an AOI with same name and stimulus assignment
/// already exists in the database,
/// otherwise <strong>false</strong>.</returns>
private static bool CheckForAOIDuplicate(AOIData shape, System.ComponentModel.BackgroundWorker splashDialog)
{
SQLiteOgamaDataSet.AOIsDataTable aoisTable =
Document.ActiveDocument.DocDataSet.AOIsAdapter.GetDataByTrialIDAndShapeName(shape.TrialID, shape.ShapeName);
if (aoisTable.Rows.Count > 0)
{
if (splashDialog != null && splashDialog.IsBusy)
{
splashDialog.CancelAsync();
}
string message = "The area of interest " + Environment.NewLine +
shape.ShapeType.ToString() + ": " + shape.ShapeName +
"already exists." + Environment.NewLine +
"Would you like to overwrite it ?";
DialogResult duplicateQuestion =
InformationDialog.Show("Overwrite AOI ?", message, true, MessageBoxIcon.Question);
// Show loading splash screen if it is not running
if (splashDialog != null && !splashDialog.IsBusy)
{
splashDialog.RunWorkerAsync();
}
if (duplicateQuestion == DialogResult.No || duplicateQuestion == DialogResult.Cancel)
{
return false;
}
// User clicked yes so update the existing entry
// Presuming the DataTable has a column named ShapeName.
string expression = "ShapeName = '" + shape.ShapeName + "' AND TrialID = '" +
shape.TrialID + "'";
DataRow[] foundRows;
// Use the Select method to find all rows matching the filter.
foundRows = Document.ActiveDocument.DocDataSet.AOIs.Select(expression);
if (foundRows.Length > 0)
{
foreach (DataRow row in foundRows)
{
row["ShapeType"] = shape.ShapeType;
row["ShapeNumPts"] = shape.ShapeNumPts;
row["ShapePts"] = shape.ShapePts;
}
}
return false;
}
return true;
}
/// <summary>
/// This method checks the given <see cref="AOIData"/> shape for invalid characters
/// and tests if it is already used in the database.
/// It shows referring message boxes when the name is not valid
/// and automatically removes invalid characters.
/// </summary>
/// <param name="shape">Ref. A <see cref="AOIData"/> with
/// the area of interest to test.</param>
/// <param name="splashDialog">A <see cref="System.ComponentModel.BackgroundWorker"/> with the
/// background splash loading dialog worker which shows progress.</param>
/// <returns><strong>True</strong>, if the AOI is valid,
/// otherwise <strong>false</strong>.</returns>
public static bool ValidateShape(ref AOIData shape, System.ComponentModel.BackgroundWorker splashDialog)
{
shape.ShapeName.Trim();
StringBuilder sb = new StringBuilder();
bool changed = false;
for (int i = 0; i < shape.ShapeName.Length; i++)
{
if (char.IsLetterOrDigit(shape.ShapeName[i]))
{
sb.Append(shape.ShapeName[i]);
}
else
{
changed = true;
}
}
shape.ShapeName = sb.ToString();
if (shape.ShapeName == string.Empty)
{
if (splashDialog != null && splashDialog.IsBusy)
{
splashDialog.CancelAsync();
}
InformationDialog.Show(
"Empty shape name",
"Please enter at least one character for the shape name",
false,
MessageBoxIcon.Information);
// Show loading splash screen if it is not running
if (splashDialog != null && !splashDialog.IsBusy)
{
splashDialog.RunWorkerAsync();
}
return false;
}
else if (IOHelpers.IsNumeric(shape.ShapeName[0]))
{
if (splashDialog != null && splashDialog.IsBusy)
{
splashDialog.CancelAsync();
}
InformationDialog.Show(
"Invalid shape name",
"Please do not use a number for the first character of the shape name.",
false,
MessageBoxIcon.Information);
// Show loading splash screen if it is not running
if (splashDialog != null && !splashDialog.IsBusy)
{
splashDialog.RunWorkerAsync();
}
return false;
}
else
{
if (changed)
{
if (splashDialog != null && splashDialog.IsBusy)
{
splashDialog.CancelAsync();
}
string message = "Please note: Non letter and non digit characters are removed from the shape name." +
Environment.NewLine + "Other characters are not allowed for the database entry.";
ExceptionMethods.ProcessMessage("Shape name modified", message);
// Show loading splash screen if it is not running
if (splashDialog != null && !splashDialog.IsBusy)
{
splashDialog.RunWorkerAsync();
}
return true;
}
if (!CheckForAOIDuplicate(shape, splashDialog))
{
return false;
}
}
return true;
}
public static bool recvEncryptedFile(long size, Socket s, AesCryptoServiceProvider key, String path, System.ComponentModel.BackgroundWorker worker)
{
Int64 left = size;
byte[] received = new byte[size];
try
{
using (FileStream writer = File.Create(path))
{
while (left > 0)
{
int dim = (left > 4096) ? 4096 : (int)left;
dim = (dim % 16 == 0) ? dim + 16 : dim + (16 - (dim % 16));
byte[] buffer = my_recv(dim, s);
if (buffer == null)
{
worker.CancelAsync();
return false;
}
byte[] decryptedData = Security.AESDecrypt(key, buffer);
if (decryptedData == null)
{
worker.CancelAsync();
return false;
}
writer.Write(decryptedData, 0, decryptedData.Length);
left -= decryptedData.Length;
double percentage = (double)decryptedData.Length / size;
worker.ReportProgress((int)(percentage * 100));
}
return true;
}
}
catch (SocketException)
{
worker.CancelAsync();
}
catch (IOException)
{
//IO error : disk full?
worker.CancelAsync();
}
return false;
}
private void InitializeBgW(ref System.ComponentModel.BackgroundWorker bgw, System.ComponentModel.DoWorkEventHandler dweh, RunWorkerCompletedEventHandler rwceh)
{
if (bgw != null)
{
if (bgw.IsBusy)
{
if (!bgw.CancellationPending)
{
bgw.CancelAsync();
bgw.Dispose();
}
}
}
bgw = new System.ComponentModel.BackgroundWorker();
bgw.WorkerSupportsCancellation = true;
bgw.DoWork += dweh;
bgw.RunWorkerCompleted += rwceh;
}