從.Hide（）更改爲.Show（）的表單不能最大化，爲什麼？

Question

我寫了一個方法，隱藏或顯示所有形式的應用程序（包括表單子項）。代碼如下：

public enum FormState 
{ 
    Show , 
    Hidden, 
    Enable, 
    Disable 
} 

private void SetAllFormsState(FormState formState) 
{ 
    FormCollection forms = Application.OpenForms; 
    FormWindowState formWinState; 
    bool state; 

    if (formState == FormState.Show) 
    { 
     formWinState = FormWindowState.Normal; 
     state = true; 
    } 
    else if (formState == FormState.Hidden) 
    { 
     formWinState = FormWindowState.Minimized; 
     state = false; 
    } 
    else 
    { 
     throw new ArgumentNullException("invalid flag"); 
    } 

    for (int i = forms.Count - 1; i >= 0; i--) 
    { 
     Form form = forms[i]; 
     form.WindowState = formWinState; 

     if (state) 
     { 
      form.Show(); 
     } 
     else 
     { 
      form.Hide(); 
     } 
    } 
} 

，但是當我再次撥打的形式：可以選擇

SetAllFormsState(FormState.Show); 

只有父窗體。子窗體顯示在窗口/任務欄中，但似乎被窗口「鎖定」，無法最大化或更改爲正常樣式。 我該如何解決它？

Answer 1

嘗試將form.WindowState後的Show()和Hide()方法調用：

for (int i = forms.Count - 1; i >= 0; i--) 
{ 
    Form form = forms[i]; 
    if (state) 
    { 
    form.Show(); 
    } 
    else 
    { 
    form.Hide(); 
    } 
    form.WindowState = formWinState; 
} 

Answer 2

也許嘗試：

private void SetAllFormsState(FormState formState) 
{ 
    FormCollection forms = Application.OpenForms; 
    FormWindowState formWinState; 
    bool state; 

    switch(formState) 
    { 
     case FormState.Show: 
      formWinState = FormWindowState.Normal; 
      state = true; 
      break; 

     case FormState.Hidden: 
      formWinState = FormWindowState.Minimized; 
      state = false; 
      break; 

     default: 
      throw new ArgumentNullException("invalid flag"); 
      break; 
    } 

    foreach(Form form in forms) 
    { 
     form.WindowState = formWinState; 

     if (state) 
      form.Show(); 
     else 
      form.Hide(); 
    } 
}