dataGridView显示不了修改后的数据（vs2010）

Question

原本list里面已有一条数据，现在想修改成两条，但是绑定到dataGridView后只显示一条，最新的显示不了，我下断点后确定dataSource里面确实2条，但就是不显示。这是为什么，大家看看这代码有什么问题？

DataTable dtUser = new DataTable();
    Common common = new Common();
    List<EntityUnit> entityUnitList = new List<EntityUnit>();

    public Form2()
    {
      InitializeComponent();
    }

    private void Form2_Load(object sender, EventArgs e)
    {
      loadCom();
      EntityUnit eu = new EntityUnit();
      eu.ID = 1;
      eu.UnitName = "三毛";
      entityUnitList.Add(eu);
      this.bindingSource1.DataSource = entityUnitList;
      this.dataGridView1.DataSource = bindingSource1;
      this.dataGridView1.Refresh();
    }
    public void loadCom()
    {
      dtUser = common.GetDataTable("select * from G_User");
      DataRow dr2 = dtUser.NewRow();
      dr2[0] = 0;
      dr2[1] = "请选择";
      dtUser.Rows.InsertAt(dr2, 0);
      this.comboBox1.DataSource = dtUser;
      this.comboBox1.DisplayMember = "UserName";
      this.comboBox1.ValueMember = "ID";
      this.comboBox1.SelectedIndex = 0;

      DataTable dtUser1 = dtUser.DefaultView.ToTable();
      this.comboBox2.DataSource = dtUser1;
      this.comboBox2.DisplayMember = "UserName";
      this.comboBox2.ValueMember = "ID";
      this.comboBox2.SelectedIndex = 0;

      DataTable dtUser3 = dtUser.DefaultView.ToTable();
      this.comboBox3.DataSource = dtUser3;
      this.comboBox3.DisplayMember = "UserName";
      this.comboBox3.ValueMember = "ID";
      this.comboBox3.SelectedIndex = 0;
    }
    public EntityUnit getDataByUserID(int userID)
    {
      EntityUnit en = new EntityUnit();

      if (userID == 1)
      {
        en.ID = 11;
        en.UnitName = "张三";
      }
      else
      {
        en.ID = 21;
        en.UnitName = "李四";
      }
      return en;
    }
    private void comboBox1_SelectedValueChanged(object sender, EventArgs e)
    {
      int id = comboBox1.SelectedValue.ToString() == "System.Data.DataRowView" ? 0 : int.Parse(comboBox1.SelectedValue.ToString());
      if (id > 0)
      {
        full(id);
      }
    }

    private void comboBox2_SelectedValueChanged(object sender, EventArgs e)
    {
      int id = comboBox2.SelectedValue.ToString() == "System.Data.DataRowView" ? 0 : int.Parse(comboBox2.SelectedValue.ToString());
      if (id > 0)
      {
        full(id);
      }
    }

    private void comboBox3_SelectedValueChanged(object sender, EventArgs e)
    {
      int id = comboBox3.SelectedValue.ToString() == "System.Data.DataRowView" ? 0 : int.Parse(comboBox3.SelectedValue.ToString());
      if (id > 0)
      {
        full(id);
      }
    }

    public void full(int id)
    {
      EntityUnit aa = getDataByUserID(id);
      entityUnitList.Add(aa);
      this.bindingSource1.DataSource = entityUnitList;
      
      this.dataGridView1.DataSource = bindingSource1;
      this.dataGridView1.Refresh();
    }
  }

 

Answer 1

尝试这样修改代码：

EntityUnit aa = getDataByUserID(id);
      entityUnitList.Add(aa);
      this.dataGridView1.DataSource = null;      
      this.dataGridView1.DataSource = entityUnitList;
      this.dataGridView1.Refresh();

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Answer 2

处于Edit状态，执行EndEdit就可以了

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forget flying