How to: Compare and Update Application Object Source Files

Article
09/30/2015

You can use Windows PowerShell cmdlets to compare different sets of Microsoft Dynamics NAV application objects to identify the differences. Then, you can choose to apply all or some of the differences to a target solution.

We recommend that you use the Merge-NAVApplicationObject cmdlet because it is the faster and easier way to merge objects. However, you can choose to use the Compare-NAVApplicationObject cmdlet and Update-NAVApplicationObject cmdlet to identify the differences before you apply them. Or, for example, when you want to apply the same modifications to multiple applications or similar. The following procedures illustrate how you can use these two cmdlets in combination

The scenario is based on the following three versions of the Microsoft Dynamics NAV application:

Version label	Description
ORIGINAL	The Microsoft release of Microsoft Dynamics NAV.
MODIFIED	The updated version of Microsoft Dynamics NAV, such as Cumulative Update 1.
TARGET	Your solution that is based on Microsoft Dynamics NAV, such as MySolution.

The steps in the following procedures compare the ORIGINAL version to the MODIFIED solution and apply the relevant changes to your TARGET solution. As a result, you have an application that contains your solution with the updates from the MODIFIED application. Alternatively, the MODIFIED solution can be your solution and the TARGET solution can be the new release from Microsoft. The actual versions that you use to set each cmdlet parameter depend on your concrete scenario. However, we recommend that MODIFIED contains the solution with the fewest changes compared to ORIGINAL. The Compare-NAVApplicationObject cmdlet compares two sets of application objects and stores the differences in DELTA files in the specified folder.

The following procedure assumes that you have exported the relevant application objects to text files. For an example of how to do that, see the To prepare the application object files section in the How to: Merge Application Changes topic.

To compare two sets of application objects

Open the Microsoft Dynamics NAV 2016 Development Shell in administrator mode.
Navigate to the location of your folders by typing a command such as the following:
```
cd c:\upgrade
```
In this example, the UPGRADE folder on the C drive contains five folders: ORIGINAL, MODIFIED, TARGET, DELTA, and RESULT. The DELTA and RESULT folders are empty. The ORIGINAL, MODIFIED, and TARGET folders contains one or more text files that contain application objects. You can now run the cmdlet.

To run the cmdlet to compare all application objects in the ORIGINAL folder to the application objects in the MODIFIED folder, type the following command:

Compare-NAVApplicationObject -OriginalPath .\ORIGINAL -ModifiedPath .\MODIFIED -DeltaPath .\DELTA

This generates a number of DELTA files that describe the difference between ORIGINAL and MODIFIED. You can open the DELTA files in text editors such as Notepad. The following example illustrates how a DELTA file identifies the difference between ORIGINAL and MODIFIED.

  CHANGES
  {
    { CodeModification  ;Target=ApplicationBuild(PROCEDURE 3); 
                         OriginalCode=BEGIN
                                        EXIT('35473-ORIGINAL'); 
                                      END; 
                         ModifiedCode=BEGIN
                                        EXIT('35978'); 
                                      END; 
                                       }
  }

You can apply those differences to TARGET by using the Update-NAVApplicationObject cmdlet.

To apply DELTA files to application objects

Open the Microsoft Dynamics NAV 2016 Development Shell in administrator mode.
Navigate to the location of your folders by typing a command such as the following:
```
cd c:\upgrade
```
In this example, the folder structure is the same as described in the previous procedure. You can now run the cmdlet.
To run the cmdlet to apply the differences that are stored in the DELTA folder to the application objects in the TARGET folder, type the following command:
```
Update-NAVApplicationObject –DeltaPath .\DELTA -TargetPath .\TARGET\*.txt -ResultPath .\RESULT
```
This merges the difference between ORIGINAL and MODIFIED with the target solution and puts the resulting solution in the RESULT folder.

You can now import the merged objects into a Microsoft Dynamics NAV database. For more information, see How to: Merge Application Changes.

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How to: Compare and Update Application Object Source Files

To compare two sets of application objects

To apply DELTA files to application objects

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