WindowsApplication with MDI [英] WindowsApplication with MDI

问题描述

大家好，



我正在使用MDI应用程序和创建菜单。我遇到了下面解释的问题。



1）我们有一个子窗口（比如发送表单），其属性WindowState为Maximized。

2）另一个子窗口（比如添加表格），其属性WindowState为Normal。



现在问题当我第一次打开发送表格时，它显示为最大化状态，但接下来当我打开添加表单时，添加表单和发送表单都处于最大化状态。



类似，

当我第一次打开添加表格然后我打开发送表格然后我得到焦点（ 使用objAddForm.Activate（））返回添加表单现在两个子表单都处于NORMAL状态。







这是父表格代码：

 公开 类 Form1 
 
 
 私人  Sub  ExitToolStripMenuIt em_Click（发件人作为 对象，e 作为 EventArgs）句柄 ExitToolStripMenuItem.Click 
  Me  .Close（）
 结束  Sub  
 
  Dim  frmFile 作为添加
 私有  Sub  AddToolStripMenuItem_Click（发件人作为 对象，e  As  EventArgs）句柄 AddToolStripMenuItem.Click 
 如果 frmFile   没什么 然后 
 frmFile = 新添加（）
 frmFile.MdiParent = 我 
 frmFile.Show（）
 < span class =code-keyword> Else  
 frmFile.MdiParent = 我 
 frmFile.Activate（）
 结束 如果 
 
 
 结束  Sub  
 
  Dim  frmSend  As 发​​送
 私有  Sub  SendToolStripMenuItem_Click（发件人< span class =code-keyword>作为 对象，e  As  EventArgs）句柄 SendToolStripMenuItem.Click 
 如果 frmSend    Nothing  然后 
 frmSend = 新发​​送（）
 frmSend.MdiParent = 我 
 frmSend.Show（）
 其他 
 frmSend.MdiParent = 我 
 frmSend.Activate（）
 结束 如果 
 结束  Sub  
 
  Dim  frmSettings  As 设置
 私有  Sub  SettingsToolStripMenuItem_Click（发件人作为  Object ，e  As  EventArgs） Handles  SettingsToolStripMenuItem.Click 
 frmSettings = 新设置（）
 frmSettings.MdiParent = 我 
 frmSettings.Show（）
 结束  Sub  
 < span class =code-keyword>结束 类 

这是添加表格代码

 公开 类添加
 
 结束 班级 

这是发送表格代码

 公开 类发​​送
 
 < span class =code-keyword>结束 类 

我刚出演该应用程序只是为了知道MDI是如何实现的，所以你找不到很多代码。



请帮助我。



请为我推荐一个解决方案。



对不起，如果有人觉得我的英语不好。



在此先感谢，

Rohith。

解决方案

有几个原因不使用MDI。请阅读谢尔盖的答案：

如何将mdi孩子带到其他形式的控件前面？ [ ^ ]

在MDI儿童表格中在面板中最小化：c＃ [ ^ ]

mdi child隐藏在父母的控件之后 [ ^ ]

如何从MDIparent表单中的另一个MDIchild表单打开MDIchid表单 [ ^ ]

< blockquote>您描述的是预期的行为。如果一个子窗口最大化，则它们将变为最大化。如果一个正常，它们都会变得正常。



MDI代表多个DOCUMENT界面，而不是多个窗口。你正在使用MDI来达到它不适合的目的。



它被设计用作文本编辑器，你有多个打开窗户，所有人都做同样的事情，编辑文件。你的应用程序没有这样做，是吗？

hi all,

I''m working with MDI Application and Creating Menus in it. I have come across an issue explained below.

1) we have a child window (say Send Form) having property WindowState as Maximized.
2) another child window (say Add Form) having property WindowState as Normal.

Now the issue is when I first open Send Form it appears maximized state but next when I open Add form both Add Form and Send Form are in MAXIMIZED state.

similarly,
when I First open Add Form then I open Send Form and then I get Focus (by using objAddForm.Activate()) back to Add Form now both Child Forms are in NORMAL state.



This is Parent form code:

Public Class Form1


    Private Sub ExitToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles ExitToolStripMenuItem.Click
        Me.Close()
    End Sub

    Dim frmFile As Add
    Private Sub AddToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles AddToolStripMenuItem.Click
        If frmFile Is Nothing Then
            frmFile = New Add()
            frmFile.MdiParent = Me
            frmFile.Show()
        Else
            frmFile.MdiParent = Me
            frmFile.Activate()
        End If


    End Sub

    Dim frmSend As Send
    Private Sub SendToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SendToolStripMenuItem.Click
        If frmSend Is Nothing Then
            frmSend = New Send()
            frmSend.MdiParent = Me
            frmSend.Show()
        Else
            frmSend.MdiParent = Me
            frmSend.Activate()
        End If
    End Sub

    Dim frmSettings As Settings
    Private Sub SettingsToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SettingsToolStripMenuItem.Click
        frmSettings = New Settings()
        frmSettings.MdiParent = Me
        frmSettings.Show()
    End Sub
End Class

This is Add Form Code

Public Class Add

End Class

This is Send Form Code

Public Class Send

End Class

I have just started the application just to know how MDI is implemented so you can''t find much code in it.

Pls help me.

Please suggest me a solution for it.

Sorry, if any one feels my English is bad.

Thanks in Advance,
Rohith.

解决方案

There are several reasons to not use MDI. Please, read Sergey''s answers:
how to bring mdi child to front of other form''s controls?[^]
In MDI Child form minimize with in panel : c#[^]
mdi child is hiding behind parent''s controls[^]
How to open a MDIchid form from another MDIchild form within a MDIparent form[^]

What you describe is the expected behavior. If one child window is maximized, they ALL become maximized. If one is normal, they all become normal.

MDI stands for Multiple DOCUMENT interface, not Multiple Window. You''re using MDI for a purpose it was not designed for.

It''s designed to be used as something of a text editor, where you have multiple windows open, all doing the exact same thing, editing documents. Your app isn''t doing that, is it??

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