Show Progress bar upon loading data on Datagridview
I need some help on showing Progress bar upon loading data on m开发者_开发知识库y DataGridView. Any sample code?
Thanks.
regards,
kurt
Start the fetching of the data on another thread in order to not lock up the UI thread. You could expose a method on the UI (presume you have separation of layers here) and call that method from your business layer. Windows Form controls expose a InvokeRequired flag that you can use to check if you are calling the control from the correct thread. If you are not on the right thread you can call a delegate to do so.
/// <summary>
/// Delegate to notify UI thread of worker thread progress.
/// </summary>
/// <param name="total">The total to be downloaded.</param>
/// <param name="downloaded">The amount already downloaded.</param>
public delegate void UpdateProgressDelegate(int total, int downloaded);
/// <summary>
/// Updates the progress in a thread-safe manner.
/// </summary>
/// <param name="total">The total.</param>
/// <param name="downloaded">The downloaded.</param>
public void UpdateProgress(int total, int downloaded)
{
// Check we are on the right thread.
if (!this.InvokeRequired)
{
this.ProgressBar.Maximum = total;
this.ProgressBar.Value = downloaded;
}
else
{
if (this != null)
{
UpdateProgressDelegate updateProgress = new UpdateProgressDelegate(this.UpdateProgress);
// Executes a delegate on the thread that owns the control's underlying window handle.
this.Invoke(updateProgress, new object[] { total, downloaded });
}
}
}
Or you could just use a BackgroundWoker ;)
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