Multiple Slicer values DAX issue

[TaroGulati]

Hi guys, 

I am stucked with one very simple logic of DAX. 

I have a small table:

I created two very simple measures as you can see below:

Measure for column values: 

value column = SWITCH(SELECTEDVALUE('Table'[Category]),

"A",10,

"B",20)

Measure for Line values: 

Value Line = SWITCH(SELECTEDVALUE('Table'[Category]),

"C",30)

I am using column and line combo chart:

the issue is that once i select single values in slicer, it works fine but once i select A  or B & C together it is showing blank. 

i am not sure if i am trying to do something in power bi which is not possibile. 

any suggestions will be really helpful for me. 

Thanks

[TaroGulati]

thanks @amitchandak 

[amitchandak · Accepted solution]

@TaroGulati , try like

value column = SWITCH(true() ,
"A" in allselected('Table'[Category]),10,
"B" in allselected('Table'[Category]),20)

Measure for Line values:
Value Line = SWITCH(true() ,
"C" in allselected('Table'[Category]),30)

First one is using switch, not the best option if both A and B are selected