What's wrong with this code ?

Question

Hi, When I run the project, it shows the following error. Anybody can help me to solve this error? Thanks

Brajesh Kumar · Answer

i think you should try this And you must check all other parameters for null value. If it null you must pass DBNull.Value value. SqlParameter unitsParam = command . Parameters . AddWithValue ( "@units" , units ); if ( units == null ) { unitsParam . Value = DBNull . Value ; } or you can go through following links http://stackoverflow.com/questions/14640094/stored-procedure-or-function-expects-parameter-which-was-not-supplied http://stackoverflow.com/questions/9799524/expects-parameter-id-which-was-not-supplied http://stackoverflow.com/questions/368642/procedure-expects-parameter-which-was-not-supplied http://stackoverflow.com/questions/23448403/the-parameterized-query-expects-the-parameter-units-which-was-not-supp

Davood Riazi · Answer

The error was solved by using this code as Brajesh Kumar recommended me. // cmd.Parameters.AddWithValue("@Code", Code); SqlParameter codeParam = cmd.Parameters.AddWithValue("@Code", Code); if (Code == null) { codeParam.Value = DBNull.Value; } SqlDataReader rd = cmd.ExecuteReader(); --------------------------------------------------------------------------------------------------- Thanks

Amit Gupta · Answer

The value of Code is null in parameter and in database it seems it must have value. Pass appropriate value in code and your problem will resolve.

Rafnas T P · Answer

here your passing null parameter check adding break point in parameter Code what value are you passing

Rafnas T P · Answer

before passing parameter you can check like this if (Code== null ) Code= "" cmd.Parmeters.AddWithValue( "@Code" ,Code);