c# - 如何将 MDI 子窗体带到前面？

Question

概述:

我有一个 MDI 父窗体，我可以在其中加载其他窗体。加载第二个表单后，我无法再将第一个表单带到前面。

描述:

在父窗体上，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，除非该表单已加载。

问题:

a. 单击“搜索”。然后单击主页。

b.如果再次单击“搜索”，它不再将其对应的、已打开的表单置于最前面。

    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

您的代码对我有用。在您的 tsmHome_Click 事件处理程序中更改一行后

你有。

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

应该是。

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

您似乎遇到了复制粘贴错误。