I'm having trouble figuring out how to use invoke to update the progress bar UI from another thread. There are a lot of clear examples in C#, but not in VB.NET. Hi, I assume you're using a BackgroundWorker. So, the first thing to do is to set the WorkerReportsProgress to True. Then each time you want to update the progress call the ReportProgress.
-->Definition
Overloads
| ReportProgress(Int32) | Windows 7 greek 32 bit iso download. Raises the ProgressChanged event. |
| ReportProgress(Int32, Object) | Raises the ProgressChanged event. |
Parameters
- percentProgress
- Int32
The percentage, from 0 to 100, of the background operation that is complete.
Exceptions
The WorkerReportsProgress property is set to false.
Examples
The following code example demonstrates the use of the ReportProgress method to report the progress of an asynchronous operation to the user. This code example is part of a larger example provided for the BackgroundWorker class.
Remarks
If you need the background operation to report on its progress, you can call the ReportProgress method to raise the ProgressChanged event. The WorkerReportsProgress property value must be true, or ReportProgress will throw an InvalidOperationException.
It is up to you to implement a meaningful way of measuring your background operation's progress as a percentage of the total task completed.
The call to the ReportProgress method is asynchronous and returns immediately. The ProgressChanged event handler executes on the thread that created the BackgroundWorker.
See also
Parameters
- percentProgress
- Int32
The percentage, from 0 to 100, of the background operation that is complete.
- userState
- Object
A unique Object indicating the user state. Returned as the UserState property of the ProgressChangedEventArgs.
Exceptions
The WorkerReportsProgress property is set to false.
Examples
The following code example demonstrates the use of the ReportProgress method to report the progress of an asynchronous operation to the user. This code example is part of a larger example provided for the ToolStripProgressBar class.
Remarks
If you need the background operation to report on its progress, you can call the ReportProgress method to raise the ProgressChanged event. The WorkerReportsProgress property value must true, or ReportProgress will throw an InvalidOperationException.
It is up to you to implement a meaningful way of measuring your background operation's progress as a percentage of the total task completed.