Adding Links for Tasks

###VSTO To link a task using VSTO:

1. Create a new project in Visual Studio.
2. In the Solution Explorer, right-click and select Add Reference.
3. Select the COM components tab, and select Microsoft Project 12.0 Object Library.
4. Click OK.

This imports the Microsoft.Office.Interop.MSProject namespace at the start of your code. Use the code from the following example to link tasks.

            //Create an Application object
            Microsoft.Office.Interop.MSProject.Application projectApplication = new MSProject.Application();

            object missingValue = System.Reflection.Missing.Value;

            //Open an MPP file
            projectApplication.FileOpenEx("Project.mpp",
                missingValue, missingValue, missingValue, missingValue,
                missingValue, missingValue, missingValue, missingValue,
                missingValue, missingValue, PjPoolOpen.pjPoolReadOnly,
                missingValue, missingValue, missingValue, missingValue,
                missingValue);

            //Create a Project object by assigning active project
            Microsoft.Office.Interop.MSProject.Project project = projectApplication.ActiveProject;

            //Add dependencies among the tasks
            project.Tasks.get_UniqueID(2).TaskDependencies.Add(project.Tasks.get_UniqueID(1), PjTaskLinkType.pjFinishToStart);
            project.Tasks.get_UniqueID(3).TaskDependencies.Add(project.Tasks.get_UniqueID(2), PjTaskLinkType.pjFinishToStart);
            project.Tasks.get_UniqueID(4).TaskDependencies.Add(project.Tasks.get_UniqueID(3), PjTaskLinkType.pjFinishToStart);
            project.Tasks.get_UniqueID(5).TaskDependencies.Add(project.Tasks.get_UniqueID(4), PjTaskLinkType.pjFinishToStart);
            project.Tasks.get_UniqueID(5).TaskDependencies.Add(project.Tasks.get_UniqueID(2), PjTaskLinkType.pjFinishToStart);

            //Display the dependencies
            foreach (Task tsk in project.Tasks)
            {
                foreach (TaskDependency dep in project.Tasks.get_UniqueID(tsk.ID).TaskDependencies)
                {
                    Console.WriteLine("From ID = " + dep.From.ID + "=>To ID = " + dep.To.ID);
                }
                Console.WriteLine("____________________________________________________________");
            }

            //Save the project
            projectApplication.FileCloseAll(Microsoft.Office.Interop.MSProject.PjSaveType.pjSave);

###Aspose.Tasks

To link tasks in a project using Aspose.Tasks for .NET:

1. Create a new project in Visual Studio.
2. In the Solution Explorer, right-click and select Add Reference.
3. Select .NET tab and select Aspose.Tasks.
4. Click OK.

This imports the Aspose.Tasks namespace at the start of your code. Use the code from the following example to link tasks.

            //Load a project
            ProjectReader rdr = new ProjectReader();
            FileStream St = new FileStream("Project.mpp", FileMode.Open);
            Project prj = rdr.Read(St);
            St.Close();

            //Link the tasks
            TaskLink tsklnk = new TaskLink(prj.RootTask.Children[0] as Aspose.Tasks.Task, prj.RootTask.Children[1] as Aspose.Tasks.Task, TaskLinkType.FinishToStart);
            prj.AddTaskLink(tsklnk);
            tsklnk = new TaskLink(prj.RootTask.Children[1] as Aspose.Tasks.Task, prj.RootTask.Children[2] as Aspose.Tasks.Task, TaskLinkType.FinishToStart);
            prj.AddTaskLink(tsklnk);
            tsklnk = new TaskLink(prj.RootTask.Children[2] as Aspose.Tasks.Task, prj.RootTask.Children[3] as Aspose.Tasks.Task, TaskLinkType.FinishToStart);
            prj.AddTaskLink(tsklnk);
            tsklnk = new TaskLink(prj.RootTask.Children[3] as Aspose.Tasks.Task, prj.RootTask.Children[4] as Aspose.Tasks.Task, TaskLinkType.FinishToStart);
            prj.AddTaskLink(tsklnk);
            tsklnk = new TaskLink(prj.RootTask.Children[1] as Aspose.Tasks.Task, prj.RootTask.Children[4] as Aspose.Tasks.Task, TaskLinkType.FinishToStart);
            prj.AddTaskLink(tsklnk);

            //Display links among the tasks
            ArrayList allinks = new ArrayList(prj.TaskLinks);
            foreach (TaskLink tasklnk in allinks)
            {
                Console.WriteLine("From ID = " + tasklnk.PredTask.Id + "=>To ID = " + tasklnk.SuccTask.Id);
                Console.WriteLine("________________________________________");
            }
            //Save the project
            prj.Save("Project1.mpp", Aspose.Tasks.Saving.SaveFileFormat.MPP);

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• Sample Code