我在vb.net上有一个系统托盘应用程序。这个应用程序有一个菜单有几个选项。可以选择语言应用程序。这个语言选项有三个子菜单:英语,法语和西班牙语。
以下是三个子菜单的snipet代码:
submnuEnglish = New ToolStripMenuItem(rm.GetString("ContextMenusToolStripMenuItemLangEnglish"))
submnuEnglish.Image = My.Resources.en
submnuEnglish.CheckOnClick = True
submnuSpanish = New ToolStripMenuItem(rm.GetString("ContextMenusToolStripMenuItemLangSpanish"))
submnuSpanish.Image = My.Resources.es
submnuSpanish.CheckOnClick = True
submnuFrench = New ToolStripMenuItem(rm.GetString("ContextMenusToolStripMenuItemLangFrench"))
submnuFrench .Image = My.Resources.fr
submnuFrench .CheckOnClick = True
在rutime中,每次从语言选项菜单中选择语言时,应用程序主菜单会在选择后自动关闭,因此我需要右键单击系统托盘应用程序再次访问应用程序主菜单。我希望能够在没有语言子菜单的情况下选择语言/主应用菜单在每个选项上都会关闭。
我该怎么做?
解决方案 - 更新: mngLanguage下面对应一个ToolStripMenuItem对象,该对象包含类型为ToolStripMenuItem的子选项submnuEnglish,submnuSpanish和submnuFrench。
MainMenu是ContextMenuStrip类型的应用程序主菜单。
Private Sub ToolStripMenuItem_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' uncheck the old ones
Dim selectedLanguage As ToolStripMenuItem = CType(sender, ToolStripMenuItem)
For Each language As ToolStripMenuItem In mnuLanguage.DropDownItems
If Not Object.Equals(selectedLanguage, language) Then
language.CheckState = CheckState.Unchecked
End If
Next
' check the new one
selectedLanguage.CheckState = CheckState.Checked
' Prevents language menu from being hiding
' Thanks to Crush Sundae ;) that guide me in the right direction with his comment
Me.mnuLanguage.DropDown.Show()
End Sub
Private Sub MainMenu_Closing(ByVal sender As Object, _
ByVal e As System.Windows.Forms.ToolStripDropDownClosingEventArgs) _
Handles MainMenu.Closing
' Avoid main menu for closing on language selection
If submnuEnglish.Pressed Or _
submnuSpanish.Pressed Or _
submnuFrench.Pressed Then
e.Cancel = True
End If
End Sub
需要在事件下方刷新所点击的语言项目的UI。如果没有实现,那么当选中一个项目(语言)时,移动鼠标后不会取消选中前一项。
Private Sub mnuLanguage_DropDownItemClicked( _
ByVal sender As Object, _
ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) _
Handles mnuLanguage.DropDownItemClicked
' Refresh language selection on dropdown menu
If e.ClickedItem.Equals(submnuEnglish) Then
' English language selected
submnuSpanish.Checked = False
submnuFrench.Checked = False
ElseIf e.ClickedItem.Equals(submnuSpanish) Then
' Spanish language selected
submnuEnglish.Checked = False
submnuFrench.Checked = False
Else
' French language selected
submnuEnglish.Checked = False
submnuSpanish.Checked = False
End If
End Sub
通过以上实施,它就像一个魅力!
在实施上述解决方案之前,我试图使用以下方法解决它:
mnuLanguage.DropDown.AutoClose = True or False depending on the case
但这样做是因为UI行为异常,奇怪的行为,例如,带有子菜单的菜单没有在鼠标悬停时自动下拉。从我的观点来看,不建议使用它。
答案 0 :(得分:1)
点击后再次打开它。
由于我无法从您的代码中看到更多内容,因此请使用this作为我所说内容的参考。
Private Sub TestToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TestToolStripMenuItem.Click
Me.ToolStripDropDownButton1.ShowDropDown()
EndSub