DAX DISTINCTCOUNT - Dynamic Field Name from SplitBy table

[disil]

Helle everyone,
Maybe it's too simple, but I despair of it.  How can I make the field name dynamic? 

I need a card  measure "Distinct of SplitBy" = DISTINCTCOUNT(Deliveries[Material])

I have a digramm which legend will split by follow parametric table:

SplitBy = {

    ("Material (A)", NAMEOF('Deliveries'[Material (A)]), 10),

    ("Material", NAMEOF('Deliveries'[Material]), 20),

    ("Material (Z)", NAMEOF('Deliveries'[Material (Z)]), 30),

.....

}

For each one of this select {Material, Material (A), ... (Z)} I need number of distinct values.

Thanks 
Peter

[Ritaf1983]

Hi @disil 

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523