用另一种形式的值填充组合框

Question

I might ask a stupid question, but I can't find it on the internet.

I have a combobox and I would like to retrieve some data from another form where the info is typed and saved by the user. If anyone is willing to help, I'll be greatful. Thanks

I used this code

 string cs = "Data Source=CODRINMA\\CODRINMA;Initial Catalog=BusManager; Trusted_Connection=True;";
            string select = "SELECT * FROM TipAutocar";

            using (SqlConnection con = new SqlConnection(cs))
            {
                con.Open();
                SqlCommand cmd = new SqlCommand(select, con);
                SqlDataReader dr = cmd.ExecuteReader();
                while (dr.Read())
                {
                    cmbTip.Items.Add(dr["Model", "Type"]);
                }
                con.Close();

And it worked..but is this possible to get for eg "Model" + "Type"?

And I get this error ->

Error 1 No overload for method 'this' takes 2 arguments

Answer 1

If I understood your question correctly, you want to add different column values to your ComboBox concatenated. So, it's as simple as that:

while (dr.Read())
    {
      cmbTip.Items.Add(dr["Model"].ToString() + " " + dr["Type"].ToString());
    }