@Dave_Start
To dynamically show text descriptions for column names in Power BI, you can use DAX expressions combined with a supporting lookup table. Here's a step-by-step guide on how to achieve this:
1. **Create a Lookup Table**: Create a table in Power BI that contains two columns: one for column names and another for their corresponding descriptions. This table will act as a lookup table.
2. **Load the Lookup Table**: Load the lookup table into your Power BI model.
3. **Create a DAX Measure**: Create a DAX measure that dynamically retrieves the description for a selected column name. You can use functions like SELECTEDVALUE and RELATED to achieve this. Here's an example of how to create such a measure:
```DAX
ColumnDescription =
VAR SelectedColumnName = SELECTEDVALUE('YourTable'[Column Name])
RETURN
IF(
ISBLANK(SelectedColumnName),
BLANK(),
RELATED('LookupTable'[Description])
)
```
Replace `'YourTable'` with the name of your table containing the column names, and `'LookupTable'` with the name of your lookup table.
4. **Display the Description in a Visual**: Add a visual (such as a card or a table) to your report canvas. Use the newly created measure (`ColumnDescription`) in this visual to dynamically display the description for the selected column name.
5. **Test and Customize**: Test your report to ensure that the descriptions are dynamically displayed based on the selected column name. You can customize the lookup table with additional descriptions as needed.
By following these steps, you can dynamically show text descriptions for column names in Power BI without the need to manually program each field separately. This approach allows for a generic implementation that can be easily applied to multiple reports with different datasets and column names.
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