SQL UPDATE stored procedure from Visual studio - sql

Question

I have an UPDATE stored procedure that works good from SQL Server query:
GO
ALTER PROCEDURE [dbo].[UpdateMedicalCard]
#RecordingCode int,
#BeginTreatmentDate date,
#EndTreatmentDate date,
#MainDiagnosis nchar(100),
#AttendantDiagnosis nchar(100),
#TreatmentResult nchar(50)
AS
BEGIN
UPDATE MedicalCard
SET BeginTreatmentDate = #BeginTreatmentDate,
EndTreatmentDate = #EndTreatmentDate,
MainDiagnosis = #MainDiagnosis,
AttendantDiagnosis = #AttendantDiagnosis,
TreatmentResult = #TreatmentResult
WHERE RecordingCode = #RecordingCode
END
But when i call this procedure from Visual studio it does not update.
SqlConnection connection = new SqlConnection();
connection.ConnectionString = #"Data Source=.;Initial Catalog=Policlinic;Integrated Security=SSPI";
connection.Open();
SqlCommand myCommand = connection.CreateCommand();
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.CommandText = "UpdateMedicalCard";
myCommand.Parameters.Add("#RecordingCode", System.Data.SqlDbType.Int);
myCommand.Parameters["#RecordingCode"].Value = dataGridView1.CurrentRow.Cells[0].Value;
myCommand.Parameters.Add("#BeginTreatmentDate", System.Data.SqlDbType.Date);
myCommand.Parameters["#BeginTreatmentDate"].Value = dataGridView1.CurrentRow.Cells[3].Value;
myCommand.Parameters.Add("#EndTreatmentDate", System.Data.SqlDbType.Date);
myCommand.Parameters["#EndTreatmentDate"].Value = dataGridView1.CurrentRow.Cells[4].Value;
myCommand.Parameters.Add("#MainDiagnosis", System.Data.SqlDbType.NChar);
myCommand.Parameters["#MainDiagnosis"].Value = "qwe";
myCommand.Parameters.Add("#AttendantDiagnosis", System.Data.SqlDbType.NChar);
myCommand.Parameters["#AttendantDiagnosis"].Value = dataGridView1.CurrentRow.Cells[6].Value;
myCommand.Parameters.Add("#TreatmentResult", System.Data.SqlDbType.NChar);
myCommand.Parameters["#TreatmentResult"].Value = dataGridView1.CurrentRow.Cells[7].Value;
var dataAdapter = new SqlDataAdapter(myCommand);
var dataTable = new DataTable();
dataAdapter.Update(dataTable);
connection.Close();
I think i do smth wrong at the last 4 rows. Help please.

Answer 1

Your command isn't going to return any result rows, so you don't need to use a DataTable or DataAdapter. You just need to call connection.ExecuteNonQuery() instead.
You may also want to double check that the data (specifically the dates, as they can be tricky since the field may or may not also store a time component depending on how the table is defined, match an existing row.