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You can return a value by setting the Result property of the Do Work Event Args in the Do Work event handler.
Then, this value can be retrieved from the Result property of the Run Worker Completed Event Args parameter int the Run Worker Completed event handler.
You can provide a parameter in the Run Worker Async method that will be available as the Argument property in the Do Work event handler.
Returning a Value from the Process You might want to return a value from a background process, such as a result from a calculation.
Data Binding Overview Binding Sources Overview Data Templating Overview Binding Declarations Overview How-to Topics System.
Multithreading can be confusing at first, but if you just take it one step at a time, it really isn’t all that bad.
Windows Presentation Foundation (WPF) data binding provides a simple and consistent way for applications to present and interact with data.
Elements can be bound to data from a variety of data sources in the form of common language runtime (CLR) objects and XML.
Using the Dispatcher to Access Controls on Another Thread At times, you may want to change the user interface from a worker thread.
For example, you may want to enable or disable buttons, or show a modal Progress Bar that provides more detailed progress information than is allowed by the Report Progress method.
If you don’t want to read how this actually works and just want to get the source and start playing ,here is the Source Code.