WinForms(Mdi容器)中的前进，后退，向上导航? [英] Forward,Back,Up Navigation in WinForms(Mdi Container)?

问题描述

嗨
我想像Windows资源管理器的行为一样导航，
假设有1个Mdi和10个子窗体，

所以我想从一种形式向前，向后，向上导航..

让我知道是否有人有主意.
在此先感谢..


问候，
Pawan.

Hi
I want to navigate like how the windows explorer behaves,
Assume There is 1 Mdi and 10 Child Forms,

So i want to navigate forward,back,up from one form to other..

Let me know if anybody have an idea..
Thanks in Advance..


Regards,
Pawan.

推荐答案

C#中的答案

创建一个项目，添加一个MDI表单并创建两个名为cmdBack和cmdForward的按钮.

The answer in C#

Create a project, add an MDI form and create two buttons named cmdBack and cmdForward.

private void cmdBack_Click(object sender, EventArgs e)
        {
            try
            {
                Form PrevForm = null;
                foreach (Form ChildForm in this.MdiChildren)
                {
                    if (ChildForm.Equals(this.ActiveMdiChild))
                    {
                        if ((PrevForm != null))
                        {
                            this.ActivateMdiChild(PrevForm);
                            PrevForm.Focus();
                            break;
                        }
                    }
                    PrevForm = ChildForm;
                }
                PrevForm = null;

            }
            catch (Exception ex)
            {
            }

        }

private void cmdForward_Click(object sender, EventArgs e)
        {
            try
            {
                Form NextForm = null;
                foreach (Form ChildForm in this.MdiChildren.Reverse())
                {
                    if (ChildForm.Equals(this.ActiveMdiChild))
                    {
                        if ((NextForm != null))
                        {
                            this.ActivateMdiChild(NextForm);
                            NextForm.Focus();
                            break;
                        }
                    }
                    NextForm = ChildForm;
                }
                NextForm = null;

            }
            catch (Exception ex)
            {
            }

        }

当我发现您的问题时遇到了同样的问题，因此我放弃了搜索.我编写的代码为我解决了这个问题.

在您的项目中，创建两个名为cmdBack和cmdForward的按钮，然后尝试以下操作:

I had the same problem when I found your question, so I gave up searching. The code I wrote resolved the problem for me.

In your project, create two buttons named cmdBack and cmdForward and try the following:

Private Sub cmdBack_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdBack.Click
        Try
            Dim PrevForm As Form = Nothing
            For Each ChildForm As Form In Me.MdiChildren
                If ChildForm.Equals(Me.ActiveMdiChild) Then
                    If Not IsNothing(PrevForm) Then
                        Me.ActivateMdiChild(PrevForm)
                        PrevForm.Focus()
                        Exit For
                    End If
                End If
                PrevForm = ChildForm
            Next
            PrevForm = Nothing
        Catch ex As Exception

        End Try
    End Sub

Private Sub cmdForward_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdForward.Click
    Try
        Dim NextForm As Form = Nothing
        For Each ChildForm As Form In Me.MdiChildren.Reverse
            If ChildForm.Equals(Me.ActiveMdiChild) Then
                If Not IsNothing(NextForm) Then
                    Me.ActivateMdiChild(NextForm)
                    NextForm.Focus()
                    Exit For
                End If
            End If
            NextForm = ChildForm
        Next
        NextForm = Nothing
    Catch ex As Exception

    End Try
End Sub

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