Question

非常基本的问题。我有3个表格。一个带有两个按钮的主窗体，需要在单击按钮时打开另外两个窗体中的一个。现在当点击按钮2然后表格2应该打开并且表格形式2人应该可以点击返回并进入主表格。我怎么能这样做？

Answer 1

VB上有点朦胧，但这应该足够好了：）

   On click of button that shows form2 [Modified]

Dim frmOne as Form1
frmOne = Me

Dim frmTwo as Form2
    frmTwo = new Form2(frmOne)
    frmTwo.show()

Note: Form2 should have a constructor that takes form1 object.

To come back place a button on Form2 and pass the object of first form to form2.
me.hide() or me.visible = false
frmOne.show()

Answer 2

在调用表单中，声明对被调用表单的引用，如果要捕获表单的事件（如form_closing），则使用withevents关键字

Public Class MDIMain
    Private WithEvents _cases As frmGrid

然后，当他们点击某些东西打开第二个表单时，创建一个新的实例：

Private Sub mnuViewCaseFiles_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuViewCaseFiles.Click
    If IsNothing(_cases) Then
        _cases = New frmGrid
        _cases.WindowState = FormWindowState.Maximized
    End If
    _cases.Visible = Me.mnuViewCaseFiles.Checked
End Sub

然后您可以处理第二个表单的onclosing事件：

Private Sub _cases_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles _cases.FormClosing
    _cases = Nothing
    mnuViewCaseFiles.Checked = False
End Sub

vb表单按钮控件

2 个答案: