IsBlank Function Difficulties

[grinds93]

Hello,

I have a two combo boxes where Combo1 is at a Regional level and Combo2 is at a territory level. The data is in a sharepoint table

Combo2 is dependent on Combo1 as when a Region is selected, the subsequent territories will be available for selection in Combo2.

I would like to know which formula would be best in Combo2 to allow all territories to be displayed when Combo1 is blank.

Combo1 is using a distinct function. One issue currently is that according to the 'IsBlank' function, the combo1 is not blank ("") even when a selection in Combo1 has not been made. Combo1 has no default selected items.

For Combo2 I am planning to use Filter and Isblank functions, that is why the Combo1 being blank is significant. 

Please let me know if there is something that is causing Combo1 to have unseen values, and if the Filter/Isblank functions are best for Combo2

Appreciate the help

[Ben_Hoople]

Not a lot of detail to work off here,

but assuming the table with the territory has a foreign key equal to a region,

you should be able to set the items property to a filter function ie:

Filter(TerritoryDataSource, ComboBox1.selectedItems.RegionalCode in <territoryTable>RegionalCode).TerritoryCode 

on the other hand, you can set the visible property of the territory box to equal something like:

ComboBox1.Selected.Value <> ""

but i think you still need to filter you items based on properties.

to learn more about the isblank or isempty functions read the solution here:

https://powerusers.microsoft.com/t5/Building-Power-Apps/IsBlank-IsEmpty-or-quot-quot/td-p/180395

its very insightful and well written. 

(ps, my hands hurt so i couldn't format all my writing properly, sorry)

Hope this helps

[WarrenBelz · Accepted solution]

Hi @grinds93 ,

Below is a structure I use that works with either blank or empty string

Filter(
   SPListName,
   Len(ComboBox1.Selected.Result) = 0 ||
   Region = ComboBox1.Selected.Result
).Territory

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