To call the procedure, it need the followng steps
open the connection of database.
open the commander , at the same time , we must set the command type be storeprocedure.
Of course, opening the command object, we must supply two arguments, one is the procedure name , and another is the connection name.
        3. add arguments that the procedure needs for the cmd object.

Eg.

Using System.Data.Sqlclient;

Public SqlDataReader procedureTest()
{

//step1: open connection;
SqlConnection conn=new Sqlconnection();
Conn.connectionstring=”data sousrce=servername; user id=sa; pwd=password; initial catalog=database name”;
Conn.open();
//step 2:set command object;
Sqlcommand cmd=new Sqlcommand(“procedure_name”,conn);
cmd.commandtype=commandtype.storedprocedure;

//step3: set parameter of procedure for cmd object;
SqlParameter param1=new Sqlparamter(“@param1_of_procedure”,SqlDbtype.varchar);

cmd.parameter.add(param1);

//step 4; execute cmd;
SqlDataReader rd;
Rd=cmd.ExecuteQuery();
Return rd;

//finished;
}