I'm trying to modify my code by placing the sql connections and querys into a c# class because currently all my .aspx.cs has connection strings with different types of querys with parameters

Like this:

string CS2 = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con2 = new SqlConnection(CS2))
    SqlCommand cmd2 = new SqlCommand("SELECT nombre FROM [Portal_B2e].[dbo].[usuarios] WHERE numero_personal = " + lblCedula.Text + "", con2);
    object labels = cmd2.ExecuteScalar();
    lblNombre.Text = labels.ToString();

As you notice i complete the query with "lblCedula.Text" so when i try to do this from a c# class it says lblCedula does not exist in this content.

How could i make a reference to the label i have in another page from the class?

This is my code in the c# class

public static List<Perfil> DeletePerfil()
    List<Perfil> listDelete = new List<Perfil>();

    string CS = ConfigurationManager.ConnectionStrings["DBCSATE"].ConnectionString;
    using (SqlConnection con = new SqlConnection(CS))
        SqlCommand cmd = new SqlCommand("SELECT nombre FROM [Portal_B2e].[dbo].[usuarios] WHERE numero_personal = " + lblCedula.Text + "", con);
        SqlDataReader rdr = cmd.ExecuteReader();
        while (rdr.Read())
             Perfil perfil1 = new Perfil();
             perfil1.perfil = Convert.ToInt32(rdr["perfil"]);
             perfil1.descripcion = rdr["descripcion"].ToString();

    return listDelete;

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