I`m new in C#..

I have write function to filter department. And this function will return idDepartment.

New problem is, department keep value "System.Windows.Forms.Label, Text : ADMIN ", that`s why i got zero. So how can i take "ADMIN" only and keep to department?

Update :

    public partial class frmEditStaff : Form
{

    private string connString;
    private string userId, department;  //Department parameter coming from here
    private string conString = "Datasource";


    public frmEditStaff(string strUserID, string strPosition)
    {
        InitializeComponent();

        //Pass value from frmListStaff to userID text box

        tbStaffId.Text = strUserID.ToString();
        userId = strUserID.ToString();
        department = strPosition.ToString();


    }

This code below is working, don`t have any problem.

public int lookUpDepart()
        {
            int idDepart=0;

            using (SqlConnection openCon = new SqlConnection(conString))
            {
                string lookUpDepartmenId = "SELECT idDepartment FROM tbl_department WHERE department = '" + department + "';";
                openCon.Open();
                using (SqlCommand querylookUpDepartmenId = new SqlCommand(lookUpDepartmenId, openCon))
                {
                    SqlDataReader read = querylookUpDepartmenId.ExecuteReader();

                    while (read.Read())
                    {
                        idDepart = int.Parse(read[0].ToString());
                        break;
                    }
                }
                openCon.Close();
                return idDepart;
            }


        }

Thanks for help. Happy nice day!