vb.net - Combobox combinatorics -

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i have form 3 combo boxes. value of combo boxes generates sql query 3 parameters. sql generates rdlc report.

for example:

combox1 values(v1,v2,v3,all)

combox2 values(v1,v2,all)

combox3 values(v1,v2,v3,4,all)

me.exampletableadapter.querywithparams(me.exampledataset.table, combobox1.selectedindex, combobox2.selectedindex,combobox1.selectedindex)

querywithparams:

select * table column1=@c1 , column2=@c2 , column3=@c3

ok, problem when selected value in combo x, cannot values because must change query , kick out parameter. example: if combo1, combo2, combo3 have values all. don't need parameters.

select * table

if combo1 all.

select * table column2=@c2 , column3=@c3

if combo1 , combo3 all

select* table column2=@c2

... in code selected value of combo , upon query.

is there way thing without generating all 8 types of queries?

ps. cannot use stored procedures because i'm using sql server compact

if value 'all' should sent query value 'null'

select *  table  (column1=@c1 or @c1 null) , (column2=@c2 or @c2 null) , (column3=@c3 or @c3 null)

edit: of course same can done specified 'all'-value example of 'all' = -1

(column1=@c1 or @c1 = -1)

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