Passing SqlParameter in webmethod asp.net -

i trying create web service execute stored procedure. , web method calling in code execute stored procedure. web method -

[webmethod(description = des_executeparamerizedselectcommand)] public datatable executeparamerizedselectcommand(string commandname, commandtype cmdtype, sqlparameter[] param) {     datatable table = new datatable();      using (sqlconnection con = new sqlconnection(connectionstring()))     {         using (sqlcommand cmd = con.createcommand())         {             cmd.commandtype = cmdtype;             cmd.commandtext = commandname;             cmd.parameters.addrange(param);              try             {                  if (con.state != connectionstate.open)                  {                      con.open();                  }                   using (sqldataadapter da = new sqldataadapter(cmd))                  {                      da.fill(table);                  }             }             catch             {                  throw;             }         }     }      return table; } 

now code in data access layer - when trying call web method, throwing compile time error.

error   2   argument 2: cannot convert 'system.data.commandtype' 'dal.sqldbhelper.commandtype'   error   3   argument 3: cannot convert 'system.data.sqlclient.sqlparameter[]' 'dal.sqldbhelper.sqlparameter[]' 

my code call webmethod -

sqldbhelper.odcdbhelper mysqldbhelper = new sqldbhelper.odcdbhelper();  public login getuserroles(string _idsid) {     login login = null;      sqlparameter[] parameters = new sqlparameter[]     {         new sqlparameter("@username", _idsid)     };     //lets list of employees in datataable      using (datatable table = mysqldbhelper.executeparamerizedselectcommand("getuserrole", commandtype.storedprocedure, parameters)) 

can please tell me someone, wrong??

thanks in advance gulrej

try this

 dal.sqldbhelper.sqlparameter[] parameters = new dal.sqldbhelper.sqlparameter[]//change here        {             sqlparameter("@username", _idsid)         };         //lets list of employees in datataable          using (datatable table = mysqldbhelper.executeparamerizedselectcommand("getuserrole", dal.sqldbhelper.commandtype.storedprocedure, parameters))