How Can i Change the ComboBox Name by parameter/variable?

I wrote this method so i can use it instead of repeating the code.but how can i change cmb1 (ComboBox Name) to something like cmb(i). what i mean if i =10 ComboBox name = cmb10.for this part of the code(cmb1.Items.Add(srd.GetValue(0).ToString());).i want to change the number regarding to i.is it possible?if it is please help me!

This is the method im trying

public void ComboText(string text,int i)
{
    try
    {
        string connectionString = @"Data Source=DESKTOP-V0HE9JH\SQLEXPRESS01;Initial Catalog=Parts_Shop;Integrated Security=True";
        SqlConnection connection = new SqlConnection(@connectionString);

        connection.Open();
        SqlCommand command = new SqlCommand("select manufacturer from Parts where item_type = '" + text + "'", connection);
        SqlDataReader srd = command.ExecuteReader();

        while (srd.Read())
        {
            cmb1.Items.Add(srd.GetValue(0).ToString());
        }

        connection.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

The Controls collection has two indexer overloads one accepting an int and another a string representing the name of the control.

var cmb = (ComboBox)Controls["cmb" + i];

This works if the combo box is placed directly on the form. If it is placed on another control like e.g. a panel, then access this container control's Controls property:

var cmb = (ComboBox)panel1.Controls["cmb" + i];

If I understood correctly, you meant Windows Forms ComboBox. If that is so, you are free to change its Name property, but you can't change its in-code name.

If all your comboboxes are already set, possible solution would be to set up the Name property beforehand (cmb1.Name = "1", cmb2.Name = "2" etc.) and then, in your void ComboText(string text,int i) loop through all the comboboxes in the window (e.g like here or use System.Linq's FirstOrDefault() method) and get the one with the Name == i.ToString().