In a project, if you need to extract data from Excel, you have a lot of options irrespective of technology. But if you have a requirement to retrieve data from a MPP (Microsoft Project Plan) file, you have a limited number of options.
Firstly, you can use MPXJ (Microsoft Project Exchange) open source Library to retrieve data from MPP file. But the problem is that it is coded in Java and the .NET version just embeds a virtual Java processor and then calls the Java-native version. It involves performance overhead.
Secondly, you can use Interop library provided in .NET Using this library, you can access an MPP file but is very complex and is low-level. Programming directly against Interop has been an issue with developers.
We came up with a generalized library keeping in mind the structure and fields of a MPP file. It provides you a direct mapping with inbuilt fields of a MPP file in an exact manner. For example, tasks in a project may have subtasks, but when you directly read it using Interop, even subtasks will be considered as separate tasks. Then the essence of a MPP file gets lost and rather it looks like an Excel file.
Fig 1.0 Structure of MILE
We have kept intact the extensibility of Interop library and allowed the user to access and create a MPP file in a generalized manner keeping the essence of a project file intact.
Fig 1.1 Class Specifications
- Disconnected architecture
- LINQ extensibility
- Generate MPP file in a generalized manner
- Accessing data from project file in its essence
- Refinement- Child tasks
- Secure for web application
Microsoft Project should be installed on your machine.
In order to use this library, you can use the following steps:
- Add reference of the provided DLL
- Create a List object of type
MppTask and a reference variable of type
- Declare a
string variable ‘
path’ to store the location of MPP file and store the path in it
path="Your path here";
- After storing the path, just instantiate an object of
MPPProject class as per the class definition:
project = new MPPProject(path);
- Retrieve all tasks present in the mpp file through the object created in the last step.
GetAllTasks method and store all tasks present in a list variable created in
lsMppTasks = project.GetAllTasks();
- Now you have a project object that contains all Tasks, subtasks and resources present in the Mpp file. With the help of
List variable, we can access subtasks and all other fields or properties of a particular task as shown below:
ChildTaskStartDate.Text = lsMpptasks .ChildTasks.StartDate.ToString();
SecondChildOfFirstTask.Text = lsMpptasks .ChildTasks.Name;
lsMppTask object can be used to access entire information present in MPP file with the help of methods as shown in the Class specification. In this way, library can be used for accessing all information present in a MPP file.
- Similarly, we can create a MPP File by creating
MppTasks and pass them into
CreateMppFile method of
MppTask task1=new MppTask();
MppTask task2=new MppTask();
For all remaining properties and methods, kindly refer to the class specification given above.