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BITS Manager is a sample GUI tool for examining and creating BITS (Background Intelligent Transfer Service) uploads and downloads. It uses information from the Calling into BITS from .NET and C# using Reference DLLs documentation to create a program that can
- list all jobs and all files in each job
- create new jobs and add file to jobs
- examine job and file settings
Each job is marked with an icon that represents its state. See the Life Cycle of a BITS Job for details on the different BITS jobs states that are possible and how they transition from one to the other.
| BITS State Icons | |
|---|---|
| Starting States | |
| Suspended | 😴 |
| Action States | |
| Queued | 🙂 |
| Connecting | 😵 |
| Transferring | 😏 |
| Transient Error | 😬 |
| Transferred States | |
| Error | 😡 |
| Transferred | 😁 |
| Final States | |
| Acknowledged | 😎 |
| Cancelled | 😧 |
Once a job is in a final state, it will no longer be enumerated. Jobs that had been enumerated but which no longer show up in an enumeration will be marked with a ⧆ character.
To build your own verison of BITS Manager
- download all of the source code including the solution (.SLN) files
- open the solution file in Visual Studio. The solution has been tested on version 15.8.9. Visual Studio must include the .NET desktop development option.
- from the menu, select Build➔Solution to build the project
The list of jobs is set up in MainWindow.xaml.cs in the RefreshJobsList function. This function calls EnumJobs on the main BITS IBackgroundCopyManager object. The RefreshJobList makes a series of JobViewControl XAML User Controls, one control for each BITS job.
The JobViewControl control displays a single job's name and description and sets the state image based on the state. When, in the MainWindow's list of JobViewControls, a single JobViewControl is selected, the JobDetailViewControl is updated with that job
The JobDetailViewControl control, when given a BITS job to display, performs three tasks.
- The SetJob method updates the display with details about the job (for example, the owner, the current status, job flags).
- The ListBITSJobFiles method updates the list of files associated with the job. It does this by creating new FileDetailViewControl objects, one per file.
- The EnableActionButton method picks which buttons (Cancel, Complete, Pause, Resume) are enabled based on the current job state
The FileDetailViewControl class contructor, when given a BITS job and file, will update the control with details about the job.
The MainWindow class also contains
- the Timer and corresponding Timer_Tick function that updates the job list and keeps it fresh
- the UI code to handle ^K^V and menu requests
- complete code to handle quick file downloads