Reading and Saving MSProject file

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4.00/5 (1 vote)

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.NET2.0

Hi, I have been searching online for some sample codes on how to correctly load and save a Microsoft Project file. After digging and some trials and errors, I stumbled upon the problem of saving the same MPP file I opened. I tried playing with the attributes, but to no avail. Here are the codes I used to play with:

object fileName = "C:\\Test.mpp";
object readOnly = false;
object missing = System.Reflection.Missing.Value;

Microsoft.Office.Interop.MSProject.PjMergeType merge = Microsoft.Office.Interop.MSProject.PjMergeType.pjDoNotMerge;

Microsoft.Office.Interop.MSProject.PjPoolOpen pool = Microsoft.Office.Interop.MSProject.PjPoolOpen.pjDoNotOpenPool;

object ignoreReadOnlyRecommended = false;
            
Microsoft.Office.Interop.MSProject.ApplicationClass appclass = new Microsoft.Office.Interop.MSProject.ApplicationClass();

appclass.FileOpen(fileName, readOnly, merge, missing, missing, missing, missing, missing, missing, missing, missing, pool, missing, missing, ignoreReadOnlyRecommended, missing);

appclass.Visible = false;

Microsoft.Office.Interop.MSProject.Project project = appclass.ActiveProject;
            
project.Resources.Add("A", 1);
project.Resources.Add("B", 2);
project.Resources.Add("C", 3);
project.Resources.Add("D", 4);
project.Resources.Add("E", 5);

Microsoft.Office.Interop.MSProject.Task task = project.Tasks.Add("Requirement Collection",missing);

task.Start = "08/1/2007";
task.Finish = "10/25/2007";

task.Assignments.Add(task.ID, 1, missing);
task.Assignments.Add(task.ID, 2, missing);

task.Milestone = true;
task.OutlineLevel = 2;

appclass.FileSave();

The problem occurs when I am trying to save. It opens up Microsoft Project and prompt me to save as instead. I just want it to let Microsoft Project out of it and quietly save. I notice that the file is opened as Read-Only even though I specified it to open not as Read-Only. I figure that I might be doing something wrong, but I have no idea what. Please point me what I am doing wrong.

By the way, I am using Microsoft Project 12.0 Object Library.

Also, how do I correctly attach a predecessor to a task?

Posted 14-Apr-11 12:26pm

Que Trac

Updated 14-Apr-11 15:19pm

walterhevedeich

v5

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Comments

googoole 11-Apr-13 10:06am

i need to add new calendar type (such as georgian calender) in setting tab ? can you help me ?

Que Trac 11-Apr-13 16:27pm

Hi, I am not sure what you mean by adding a new calendar type to the setting tab. The code above is for writing data to a particular Microsoft Project file. It seems to me that your question is not directly related to what is shown above. I suggest you to direct your question to a new, but separate question page.

Ganesh Kumar.G 9-Nov-15 2:01am

While i am creating
ApplicationClass appclass = new ApplicationClass();
it will show's the following error
An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in ConsoleApplication1.exe

KalpanaGupta28 14-Apr-17 0:43am

I am getting error as "appclass doesnot exist in the current context"
appclass.FileOpen(fileName, readOnly, merge, missing, missing, missing, missing, missing, missing, missing, missing, pool, missing, missing, ignoreReadOnlyRecommended, missing);

2 solutions

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Graham Shanks · Accepted Answer · 2011-04-15T10:33:00

Solution 1

Works OK for me (in Project 10.0). The only way that I could find to make it come up with the SaveAs dialog was if the source file was read only in the first place

Posted 15-Apr-11 10:33am

Graham Shanks

Comments

Joezer BH 10-Sep-13 3:34am

5ed!

Que Trac · Accepted Answer · 2011-04-20T15:08:00

Solution 2

After searching online and testing out on a different directory, it works. It was Windows 7 administrator control interfering with the program in the first place. Also, after opening the file, I need to close it. If I don't close the file, the project file will stack up in the task-bar.

MIDL

//appclass.FileSave();
appclass.FileClose(Microsoft.Office.Interop.MSProject.PjSaveType.pjSave, missing);

Posted 20-Apr-11 15:08pm

Que Trac

Updated 20-Apr-11 15:11pm

v3

Comments

pk patel 16-Oct-12 7:40am

hi. I am also using the same code. But i get following exceptation.
can you help to solve it out???

"Retrieving the COM class factory for component with CLSID {36D27C48-A1E8-11D3-BA55-00C04F72F325} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."

Joezer BH 10-Sep-13 3:35am

5ed!

Que Trac 11-Apr-13 16:18pm

I don't recall getting that kind of errors before, but after googling for it, you can try to see if the following link will fix the problem.

http://digioz.blogspot.com/2011/09/retrieving-com-class-factory-for.html

SSV3273 1-Mar-16 6:22am

Throws an error that the interop class APplicationClass cannot be embedded, try using the interface instead....