隱藏面板控制時，會顯示子窗體

Question

我試圖隱藏的parent Form2面板控制按鈕被點擊時GroupSelect childform打開另一個child form GroupExmStart，當這種GroupExmStart形式變得比panel4開放應該隱藏，當它關閉比應該是可見的，我試過下面的代碼，但它不工作，也沒有發生。我錯在哪裏，我該如何正確地做到這一點？

父窗體

public partial class Form2 : Form 
{ 
    public Control control 
    { 
     //using this I accessed panel4 in child form GroupSelect 
     get {return this.panel4; } 
    } 
} 

子窗體

public partial class GroupSelect : Form 
{ 
    private void button1_Click(object sender, EventArgs e) 
    { 
     Form2 frm2 = new Form2(lgnName); 
     frm2.panel4.Visible = false; 

     GroupExmStart grpexamfrm = new GroupExmStart(GrpID, DurationID, lgnName); 
     grpexamfrm.MdiParent = this.ParentForm; 
     //showing another child form and 
     grpexamfrm.Show(); 
    } 
} 

Answer 1

此代碼的工作對我非常好

在父窗體

public Form2(string userName) 
     { 
     InitializeComponent();    
     panelHide = panel4; 
     } 
public static Panel panelHide = new Panel(); 

在GroupSelect子窗體

private void button1_Click(object sender, EventArgs e) 
     { 
      Form2.panelHide.Hide(); 
     } 

Answer 2

要創建新的窗口2，但我明白的問題侑父窗體是窗體2，所以你可以按照以下

做

private void button1_Click(object sender, EventArgs e) 
{ 
    var frm2 = this.Parent as Form2; 
    if(frm2 !=null) 
     frm2.control.Visible = false; 

    GroupExmStart grpexamfrm = new GroupExmStart(GrpID, DurationID,lgnName); 
    grpexamfrm.MdiParent = this.ParentForm; 
    grpexamfrm.Show();//showing another child form and 
}