private void ToFileAsyncCB(IAsyncResult ar)
{
ToFileAsyncDelegate dlgt = (ToFileAsyncDelegate)ar.AsyncState;
// Call EndInvoke, since the docs say we MUST
dlgt.EndInvoke(ar);
// Inform caller that the asynchronous operation is now complete
if (this.NotifyDoneCallback != null)
{
this.NotifyDoneCallback(this, null);
}
}
/// <summary>
/// Call to asynchronously convert data to SPSS format using a passed in SQL query
/// to provide the data.
/// </summary>
/// <param name="dataTable">
/// The DataTable to convert to SPSS format
/// </param>
/// <param name="data">An enumerable list of DataRows.</param>
/// <param name="spssSavFilename">
/// The fully-qualified target .SAV file to save results to
/// </param>
/// <param name="fillInMetaDataCallback">
/// Callback function to provide per-variable metadata
/// </param>
/// <param name="notifyDoneCallback">
/// The method to call when the process is complete.
/// </param>
/// <returns>
/// Returns a handle to poll the status of the conversion.
/// </returns>
public static IAsyncResult ToFileAsync(DataTable dataTable, IEnumerable <DataRow> data, string spssSavFilename,
Action <SpssVariable> fillInMetaDataCallback, EventHandler notifyDoneCallback)
{
// Spin off an asynchronous thread to do the work
// Be sure to use a callback function, even if we don't care when this
// conversion is done, since we must call EndInvoke.
ToFileAsyncDelegate dlgt = new ToFileAsyncDelegate(ToFile);
// Instantiate an instance of this class, to save the vbNotifyDone parameter
// so that we know who to tell when this operation is complete.
SpssConvert instance = new SpssConvert(notifyDoneCallback);
return(dlgt.BeginInvoke(dataTable, data, spssSavFilename, fillInMetaDataCallback,
new AsyncCallback(instance.ToFileAsyncCB), dlgt));
}
/// <summary>
/// Call to asynchronously convert data to SPSS format using a passed in SQL query
/// to provide the data.
/// </summary>
/// <param name="dataTable">
/// The DataTable to convert to SPSS format
/// </param>
/// <param name="data">An enumerable list of DataRows.</param>
/// <param name="spssSavFilename">
/// The fully-qualified target .SAV file to save results to
/// </param>
/// <param name="fillInMetaDataCallback">
/// Callback function to provide per-variable metadata
/// </param>
/// <param name="notifyDoneCallback">
/// The method to call when the process is complete.
/// </param>
/// <returns>
/// Returns a handle to poll the status of the conversion.
/// </returns>
public static IAsyncResult ToFileAsync(DataTable dataTable, IEnumerable<DataRow> data, string spssSavFilename,
Action<SpssVariable> fillInMetaDataCallback, EventHandler notifyDoneCallback)
{
// Spin off an asynchronous thread to do the work
// Be sure to use a callback function, even if we don't care when this
// conversion is done, since we must call EndInvoke.
ToFileAsyncDelegate dlgt = new ToFileAsyncDelegate(ToFile);
// Instantiate an instance of this class, to save the vbNotifyDone parameter
// so that we know who to tell when this operation is complete.
SpssConvert instance = new SpssConvert(notifyDoneCallback);
return dlgt.BeginInvoke(dataTable, data, spssSavFilename, fillInMetaDataCallback,
new AsyncCallback(instance.ToFileAsyncCB), dlgt);
}