I am developing a project (WPF) and I have a Datagrid, the load is more than 5000 records from the database, so I used BackgroundWorker to advise the user that the data is loading, but it is so slow, I need to wait almost 2 minutes to load the data from the database data, instead, if I am not using BackgroundWorker, I only have to wait 3 seconds to load the data into Datagrid.
Here I am writing a piece of code that I use for BackgroundWorker:
private void RunWorker()
{
worker = new BackgroundWorker();
worker.WorkerReportsProgress = true;
worker.WorkerSupportsCancellation = true;
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged);
worker.RunWorkerAsync();
}
private void worker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker senderWorker = sender as BackgroundWorker;
dc = new DataClasses1DataContext();
var query = from c in dc.Contact_DDBB_Xavis
select
new
{
c.ContactID,
c.Continent,
c.Country,
c.City,
c.PostalCode,
c.CompanyName,
c.UserCreated,
c.DateCreated,
c.UserModified,
c.DateModified
};
if (query.Count() > 0)
{
for (int i = 0; i < query.Count(); i++)
{
int progressInPercent = (int)(((decimal)(i + 1) / (decimal)query.Count()) * 100);
worker.ReportProgress(progressInPercent, i);
System.Threading.Thread.Sleep(10);
e.Result = query.ToList();
}
}
if (senderWorker.CancellationPending)
{
e.Cancel = true;
}
}
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error == null)
{
this.dataGrid.DataContext = e.Result;
backGround.Visibility = Visibility.Collapsed;
duracel.Visibility = Visibility.Collapsed;
txtBackWORK.Visibility = Visibility.Collapsed;
}
}
private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
for (double i = 0.0; i < e.ProgressPercentage; i++)
{
duracel.pthFiller.Width = 0;
double max = 312;
max = (double)e.ProgressPercentage;
duracel.pthFiller.Width = e.ProgressPercentage * 3.12;
duracel.txtStatus.Text = e.ProgressPercentage + " %";
txtBackWORK.Text = String.Format("Loading " + e.ProgressPercentage + " %");
}
}
now I don’t know if there is something wrong in my code, so I ask you some tips on how to load data from a database faster without waiting for so long.
Thank you for the attention.
Have a good time.
Greetings