c# - 如何将 MDI 子表单放在前面？

Question

概述：

我有一个 MDI 父表单，我可以在其中加载其他表单。加载第二个表格后，我无法再将第一个表格带到前面。

描述：

在父表单上，我有一个包含 2 个菜单项的菜单条；主页和搜索。每个点击事件都会加载相应的表单，除非所述表单已经加载。

问题：

一个。单击搜索。然后单击主页。

湾。如果再次单击“搜索”，它不再将其对应的、已打开的表单带到前面。

    private void tsmHome_Click(object sender, EventArgs e)
    {
        // Loop through all open forms...
        foreach (Form form in Application.OpenForms)
        {
            // If frmHome is Opened, set focus to it and exit subroutine.
            if (form.GetType() == typeof(frmSearch))
            {

                form.Activate();
                return;
            }
        }

        // If frmHome is not Opened, create it. 
        frmHome f = new frmHome();
        f.MdiParent = this;
        f.Show();
    }

    private void tsmSearch_Click(object sender, EventArgs e)
    {
        // Loop through all open forms...
        foreach (Form form in Application.OpenForms)
        {
            // If frmSearch is Opened, set focus to it and exit subroutine.
            if (form.GetType() == typeof(frmSearch))
            {

                form.Activate();
                return;
            }
        }

        // If frmSearch is not Opened, create it. 
        frmSearch f = new frmSearch();
        f.MdiParent = this;
        f.Show();
    }

Answer 1

tsmHome_Click您的代码对我有用..在您的事件处理程序 中更改了一行之后

你有过。

if (form.GetType() == typeof(frmSearch))

它应该是。

if (form.GetType() == typeof(frmHome))

看起来像复制粘贴错误让你。

Answer 2

您可以将代码更改为此，如果表单存在，请将其放在前面。

   // Loop through all open forms...
    foreach (Form form in Application.OpenForms)
    {
        // If frmSearch is Opened, set focus to it and exit subroutine.
        if (form.GetType() == typeof(frmSearch))
        {

            form.Activate();
            form.BringToFront();
            //form.WindowState = FormWindowState.Maximized;
            return;
        }
    }

    // If frmSearch is not Opened, create it. 
    frmSearch f = new frmSearch();
    f.MdiParent = this;
    f.Show();

Answer 3

您可以尝试几种选择：

f.TopMost = true;
f.BringToFront();

此外，您可以在对话框模式下打开窗口：

f.ShowDialog();

希望这会有所帮助。此致，