i try get multiple values from stored procedure, but i get a error that are more than one values.

i will fill a combobox.

in the stored procedures i have:
select name
into param1
from clients


what can i do?

You are trying to store multiple values (actually tuples) into a single variable here.
How do you think that is going to work?

What exactly are you trying to return from your stored procedure?

i try select all names from the table clients.

than in c#, i try fill a combobox with that data.

you will need to create a cursor and loop through each of the results from the query and put them in one by one into the combobox with the data.

Why do you think you need a stored procedure for that?

That sounds like a trivial case of running a SELECT in C# and processing the result set (as it-iss.com has said as well)