Writing Updated Task Data to MPP

With Aspose.Tasks for Java it is possible to update tasks and then write the updated data back to a Microsoft Project MPP file.

Updating Task Data The following code snippet shows how to update a project’s task data and write it back to the MPP file. The step involved in this activity are:

  1. Create an instance of Project Reader.
  2. Read the source MPP file.
  3. Create a Task and add it to the root task.
  4. Update the task parameters such as Deadline, NotesText, etc.
  5. Add additional tasks to the root task.
  6. Save the project.

The following code finds a task’s original and external ID through the cross-project.

 1// For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
 2// The path to the documents directory.
 3String dataDir = Utils.getDataDir(UpdatedTaskLinkDataToMpp.class);
 4
 5long OneSec = 10000000;// microsecond * 10
 6long OneMin = 60 * OneSec;
 7long OneHour = 60 * OneMin;
 8
 9Project project = new Project(dataDir + "Aspose\\SampleNewMSP.mpp");
10Task task1 = project.getRootTask().getChildren().add("First task");
11
12java.util.Calendar cal = java.util.Calendar.getInstance();
13cal.set(2013, 12, 10, 8, 0, 0);
14project.set(Prj.START_DATE, cal.getTime());
15task1.set(Tsk.START, cal.getTime());
16task1.set(Tsk.DURATION, project.getDuration(OneHour * 24, TimeUnitType.Hour));
17
18Task summary = project.getRootTask().getChildren().add("Summary task");
19summary.getChildren().add(task1);
20
21project.getRootTask().getChildren().add(summary);
22
23cal.setTime(task1.get(Tsk.START));
24cal.add(java.util.Calendar.DATE, 10);
25task1.set(Tsk.DEADLINE, cal.getTime());
26
27task1.set(Tsk.NOTES_TEXT, "The first task.");
28task1.set(Tsk.DURATION_FORMAT, TimeUnitType.DayEstimated);
29task1.set(Tsk.CONSTRAINT_TYPE, ConstraintType.FinishNoLaterThan);
30
31cal.setTime(task1.get(Tsk.DEADLINE));
32cal.add(java.util.Calendar.DATE, -1);
33task1.set(Tsk.CONSTRAINT_DATE, cal.getTime());
34
35// Create 10 new tasks
36for (int i = 0; i < 10; i++) {
37    String taskName = "Task " + (i + 2);
38    Task task = summary.getChildren().add(taskName);
39    task.set(Tsk.START, task1.get(Tsk.START));
40    long lDuration = (long) task1.get(Tsk.DURATION).toDouble();
41    lDuration = (long) (lDuration + (OneHour * 8 * (i + 1)));
42    task.set(Tsk.DURATION, project.getDuration(lDuration, TimeUnitType.Hour));
43    task1.set(Tsk.DURATION_FORMAT, TimeUnitType.Day);
44
45    cal.setTime(task1.get(Tsk.DEADLINE));
46    cal.add(java.util.Calendar.DATE, 1 + i);
47    task.set(Tsk.DEADLINE, cal.getTime());
48    task.set(Tsk.FINISH,
49            project.get(Prj.CALENDAR).getFinishDateByStartAndWork(task.get(Tsk.START), task.get(Tsk.DURATION)));
50    summary.getChildren().add(task);
51}
52
53// Save the Project
54project.save(dataDir + "Aspose\\WritingUpdatedTaskDataToMpp.mpp", SaveFileFormat.MPP);

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