C#

LoadCubeInBackground = New BackgroundWorker();
LoadCubeInBackground.WorkerReportsProgress = True;
LoadCubeInBackground.WorkerSupportsCancellation = True;

LoadCubeInBackground.DoWork += new DoWorkEventHandler(LoadCube);
LoadCubeInBackground.ProgressChanged += new ProgressChangedEventHandler(LoadCubeInBackground_ProgressChanged);

LoadCubeInBackground.RunWorkerAsync(_connectionString);

Luc Pattyn wrote:

1. is the code shown running on the main thread? BGW does NOT behave the way one expects when created on another thread!

Luc Pattyn wrote:

2. what is inside DoWork(), could you show the first few lines?

//Open DataCube
ADODB.Connection oCn = New ADODB.Connection();
ADOMD.Catalog oCat = New ADOMD.Catalog();

LoadCubeInBackground.ReportProgress(0, "Opening Data Cube");

ConnectionString myCStringType = e.Argument;

Luc Pattyn wrote:

3. "the first line of my LoadCube function never gets hit." how do you observe that?

Luc Pattyn wrote:

4. Environment.GetCommandLineArgs. Beware command line length limitations (could be 2K).

TcpChannel channel;
...
Hashtable properties = new Hashtable();
...
properties.Add("name", "UniqueStringHere");

channel = new TcpChannel(properties, clientProvider, serverProvider);

ChannelServices.RegisterChannel(channel, false);

protected class myHandler
{
public int fileProgress;
public int overallProgress;
public object Clone();
}

bgWorker.reportProgress(0,myHandler.Clone());

Int32[] myProgress = new Int32[];
bgWorker.reportProgress(0, myProgress);

foreach (string filename in filenames) {
    // signal new file
    ReportProgress(101, filename);
    // now do file operation and report progress
    ... some kind of loop {
        ...
        ReportProgress(percentage, filename);
    }
    // signal end of file
    ReportProgress(102, filename);
}

long totalDone;
long overallTotal;
Directory<string filename, long filesize> namesToSizes;

void ProgressChanged(object sender, ProgressChangedEventArgs e) {
    int p=e.ProgressPercentage;
    string filename=e.UserState;
    long filesize=namesToSizes[filename];
    if (p==101) {
        labelIndividual.Text="now dealing with file "+filename;
    } else if (p==102) {
        totalDone+=filesize;
    } else {
        ProgressBarIndividual.Value=p;
        ProgressBarTotal.Value=(totalDone+filesize*p/100)*100/overallTotal;
    }
}