VB.NET中MDI子窗体问题
我建了个项目，其中MDI子窗体的关闭全是执行.hide操作，但该操作占内存，有没有其他什么方法使被窗体关闭后能再次被打开。
具体该怎么做？希望最好能有代码，谢谢！
[解决办法]
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Form2.Show() End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Form2.Close() End Sub
[解决办法]
关闭和hide不一样。
form的show方法，既可以在窗体hide时，或者已经close时，加载该窗体。
代码可以这样写：
Private Sub MDIParent1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Form1.Parent = MdiParent
Form2.Parent = MdiParent
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Form1.Show()
Form2.Show()
End Sub
如果，你关闭了form1和form2，此时你单击button1时，form1和form2都会显示出来，不管是这两个窗体是隐藏的还是关闭的。
[解决办法]
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If frm2 Is Nothing OrElse frm1.IsDisposed Then
frm2 = New Form2
With frm2
.MdiParent = Me
End With
End If
frm2.Show()
End Sub
