Dynamic Logo Display in Power BI Based on Logged-In User (RLS)

In Power BI, we can change the logo image displayed on a report page dynamically based on the currently logged-in user. This is particularly useful for providing a personalized experience, especially in reports prepared for different departments or partners.

Steps to Implement Dynamic Logo Display

1. Data Preparation

Create a table that maps users to their respective logo URLs. This table will be used for RLS (Row-Level Security).

Example Table Structure:

2. Setting Up RLS

Configure Row-Level Security (RLS) in Power BI to restrict access to the logo URLs based on the user logged in.

Step-by-Step RLS Setup:

• Go to the Modeling tab.
• Click on "Manage Roles."
• Create a new role and use DAX to filter the logo.

UserRole = [UserName] = USERNAME()

3. Creating the Dynamic Logo Measure

With the RLS configured, create a measure in Power BI that retrieves the logo URL based on the logged-in user.

DAX Measure Code

The following DAX code illustrates how to create the measure:

DynamicLogoURL = 
VAR CurrentUser = USERNAME() 
RETURN 
    CALCULATE(
        MAX(Logos[LogoURL]), 
        FILTER(Logos, Logos[UserName] = CurrentUser)
    )

Documentation Block:

/** 
 * DynamicLogoURL
 * 
 * This measure returns the URL of the logo assigned to the currently logged-in user.
 * 
 * Returns: 
 * - Logo URL as a string.
 * 
 * Raises: 
 * - ERROR if the user is not found in the Logos table.
 */

4. Adding the Image to the Report

1. Insert an Image visual in your report.
2. Set the Image URL property to use the DynamicLogoURL measure you created.

5. Testing and Validation

• Preview your report and log in with different user accounts to verify that the correct logo displays based on the desired security settings.

Example Usage

To apply this in a real-world scenario:

• Ensure that you have a comprehensive list of logos and users.
• Use the provided DAX measure to dynamically pull the appropriate logo as users access the report.

Notes

• Ensure the URLs used are accessible by all users that could potentially view the report.
• Test the functionality thoroughly with a range of user accounts to ensure that RLS is functioning correctly.

Conclusion

This implementation allows for a personalized reporting experience in Power BI by changing the logo based on the user. Using DAX measures in conjunction with RLS ensures scalability and efficiency within your reports.

For further learning and insights tailored to enhancing skills in Power BI, consider exploring resources available on the Enterprise DNA Platform.