visualstudio 和sql

有哪位巨佬知道错lable16的值为什么不显示吗
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace staffmanager
{
public partial class Main1 : Form
{
public Main1()
{
InitializeComponent();
}
string Id;
public void GetId(string id)
{
label16.Text = id;
label16.Refresh();
Id = id;
}
internal void GetENo(string username)
{
throw new NotImplementedException();
}

    private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
    {

    }

    private void label7_Click(object sender, EventArgs e)
    {

    }
   
    private void button1_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

    private void Main1_Load(object sender, EventArgs e)
    {
       
        // TODO: 这行代码将数据加载到表“managementDataSet.Employee_info”中。您可以根据需要移动或删除它。
        this.employee_infoTableAdapter.Fill(this.managementDataSet.Employee_info);

        string name, sex, dept, tel;

        string connString = "Data Source=DESKTOP-0M0CC8Q;Initial Catalog=management;Integrated Security=True";//数据库连接字符串
        SqlConnection conn = new SqlConnection(connString);//创建connection对象
        conn.Open();//打开数据库  
                    //创建数据库命令  
        SqlCommand cmd = conn.CreateCommand();
        //创建查询语句  
        cmd.CommandText = "select * from Employee_info where ENo ='" + Id + "'";
        //从数据库中读取数据流存入reader中  
        SqlDataReader reader = cmd.ExecuteReader();
        //从reader中读取下一行数据,如果没有数据,reader.Read()返回flase  
        while (reader.Read())
        {
            
            name = reader.GetString(reader.GetOrdinal("Ename"));
            sex = reader.GetString(reader.GetOrdinal("Esex"));
            tel = reader.GetString(reader.GetOrdinal("EPhone"));
            dept = reader.GetString(reader.GetOrdinal("DNo"));
            
           
            label7.Text = name;
            label7.Refresh();
            label8.Text = sex;
            label10.Text = tel;
            label9.Text = dept;
            break;
        }
        reader.NextResult();//执行下一句操作
                          

        reader.Close();
        
       

    }


    private void tabPage2_Click(object sender, EventArgs e)
    {

    }

    private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {



    }
}

GetId 这个方法没有被调用