c# - winform 中的 GroupBox 在页面后面的代码中不可访问

Question

我有一个简单的winform应用程序，我GroupBox在designer.cs页面中有一个我也可以在设计中看到的页面。现在，当我尝试访问m_ConstraintGroupBox后面的代码时ComboBox Label，我无法访问我可以访问的位置和其他控件。下面在我的设计器代码中。

 System.Windows.Forms.GroupBox m_ConstraintGroupBox;
 m_ConstraintGroupBox= new System.Windows.Forms.GroupBox();
 m_ConstraintGroupBox.SuspendLayout();
 m_ConstraintGroupBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
 m_ConstraintGroupBox.Controls.Add(this.cmbConstriant);
 m_ConstraintGroupBox.Controls.Add(this.lblConstraint);
 m_ConstraintGroupBox.Controls.Add(this.groupBox1);
 m_ConstraintGroupBox.Location = new System.Drawing.Point(378, 194);
 m_ConstraintGroupBox.Name = "m_ConstraintGroupBox";
 m_ConstraintGroupBox.Size = new System.Drawing.Size(216, 79);
 m_ConstraintGroupBox.TabIndex = 3;
 m_ConstraintGroupBox.TabStop = false;
 m_ConstraintGroupBox.Text = "Constraint";

访问代码如下

public sealed partial class LinkForm : AMBaseForm
{
    private Link m_link;
    private readonly BindingList<Interface> m_interfaces = new BindingList<Interface>();
    private DomainFilterROCollection<ComponentClass> m_availComponentClasses;
    private DomainFilterROCollection<Gauge> m_gaugies;

    public LinkForm()
    {
        InitializeComponent();

        cmbConstriant.Visible = false;
                lblConstraint.Visible = false;
                m_ConstraintGroupBox.
        m_ChooseIconControlControl.IsNode = false;

    }
 }