Question

How to convert a C# DateTime variable into Enum of SqlDataType.DateTime?

How to consume that enum into a connection string?

Is doing something like this correct?

string str = "SELECT * FROM TABLE WHERE CreateDt " + <that enum>;
SqlConnection Connection = new SqlConnection (<connection setting>);
Table = new DataTable();
SqlDataAdapter adapter = new SqlDataAdapter(str, Connection);
adapter.FillSchema(Table, SchemaType.Source);
adapter.Fill(Table);

Thank you

Answer 1

Your best option is to use a parameterized command:

            var cmd = new SqlCommand();
            cmd.Connection = conn;

            DateTime MyDate = DateTime.Now;

            cmd.CommandText = @"SELECT * FROM TABLE WHERE CreateDt = @MyDate";
            cmd.Parameters.AddWithValue("@MyDate", @MyDate);

            SqlDataAdapter adapter = new SqlDataAdapter();
            adapter.SelectCommand = cmd;
            adapter.FillSchema(Table, SchemaType.Source);
            adapter.Fill(Table);