c# - calling procedure from sql -

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i coding winform application call procedure in datagrid. have method define parameters of procedure

 public int add_nastavenie(out int typnastav, int nastavid, string hod)     {         resetparameters();         cmd.commandtext = "add_nastav";         cmd.commandtype = commandtype.storedprocedure;          sqlparameter sqlparameter;          var sqlparameterout = new sqlparameter("@typnastav", sqldbtype.int);         sqlparameterout.direction = parameterdirection.output;           sqlparameter = new sqlparameter("@nastavenieid", sqldbtype.int);         sqlparameter.direction = parameterdirection.input;         sqlparameter.value = nastavid;         cmd.parameters.add(sqlparameter);          sqlparameter = new sqlparameter("@hodnota", sqldbtype.nvarchar, 100);         sqlparameter.direction = parameterdirection.input;         sqlparameter.value = hod;         cmd.parameters.add(sqlparameter);          var sqlparameterret = new sqlparameter("retvalue", sqldbtype.int);         sqlparameterret.direction = parameterdirection.returnvalue;          cmd.executenonquery();         typnastav = (int)sqlparameterout.value;         return (int)cmd.parameters["retvalue"].value;      }

then call procedure way

 dataconnector.add_nastavenie(typnastav,nastavid,hod);

i have error argument 1 must passed 'out' keyword

i change dataconnector.add_nastavenie(out typnastav,nastavid,hod);

error dissapear application not working, procedure nothing .

my try catch exception show : procedure or function 'add_nastav' expects parameter '@typnastav', not supplied.

can find solution ? .

you haven't added output parameter stored procedure expecting:

 cmd.parameters.add(sqlparameterout);

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