Color Coding Submission ID in Power BI

To highlight the [submissionid] column in a Power BI table based on whether it is not null, we need to create a custom measure using DAX (Data Analysis Expressions). This section will detail the function, provide necessary imports, input validation, and usage examples.

Step-by-Step Implementation

1. Create a Measure for Color Coding

In Power BI, you can create a measure that returns a color code based on the values in the [submissionid] column. Here's how you can do it:

Code Snippet (DAX)

SubmissionID Color = 
/**
 * This measure returns a color based on the value of the [submissionid] column.
 *
 * Parameters:
 * - None
 *
 * Returns:
 * - A string color code ("Red", "Green") based on whether [submissionid] is not null.
 *
 * Exceptions:
 * - Returns "Red" if [submissionid] is null, otherwise returns "Green".
 */
VAR SubID = SELECTEDVALUE('YourTableName'[submissionid]) 
RETURN 
IF(ISBLANK(SubID), "Red", "Green")

2. Input Validation

• The measure uses SELECTEDVALUE to get the current value of [submissionid].
• If the value is blank (null), it returns "Red", otherwise "Green".
• Ensure that the table name (YourTableName) is replaced with the actual name of your table.

3. Apply Conditional Formatting in Power BI

Once the measure is created, follow these steps to apply the color coding in your report:

1. Select the visual (table or matrix) that contains the [submissionid] column.
2. Go to the Format pane.
3. Expand the Conditional formatting section and select Background color (or Font color as needed).
4. Choose Format by: Field value.
5. For Based on field, select the SubmissionID Color measure you created.
6. Adjust any additional settings as preferred.

4. Commentary

• SELECTEDVALUE: This function retrieves the value from [submissionid] for the current row context; when referenced in a visual, it eliminates the need for row-by-row processing.
• ISBLANK: A DAX function that checks whether the value of the submission ID is null.

Code Usage Example

Assuming you have a table named Submissions with a column [submissionid], you can implement the measure as follows:

SubmissionID Color = 
VAR SubID = SELECTEDVALUE('Submissions'[submissionid]) 
RETURN 
IF(ISBLANK(SubID), "Red", "Green")

After adding this measure, follow the conditional formatting steps outlined above to see the effects in your visuals.

Conclusion

This comprehensive guide shows how to create a dynamic measure to color code a [submissionid] in Power BI. Incorporating DAX functions allows for efficient handling of null values. You might want to explore additional resources on DAX measures and conditional formatting through the Enterprise DNA Platform to enhance your Power BI skills further.