等待MDI子进程关闭，类似于ShowDialog()

发布于 2024-09-07 11:07:16 字数 480 浏览 10 评论 0原文

我有一个 MDI 应用程序，我想在其中使用模式对话框...是的，我知道这有点违反 MDI 的原则...无论如何，我的主窗口更像是一个“工作区”然后还有其他的事情。

回到主题，如何等待 MDI-Child 关闭？一些示例代码：

  public void DoSomething() {
    String searchterm = this.TextBox1.Text;
    MyItem result = MySearchForm.GetItem(searchterm);

    if(MyItem != MyItem.Empty) {
        // do something
    }
  }

MySearchForm 是主窗口的 MDI 子级，因此我无法使用 ShowDialog()，但我仍然想使用阻塞方法来等待窗口关闭并返回结果。我想过在另一个线程上调用它并等待该线程退出，但这也不适用于 MDI。

有人有想法吗？

原文

I've got a MDI-Application in which I'd like to use modal dialogs...yes, I know that this is a little against the principles if MDI...anyway, my main window is more of a 'workspace' then anything else.

Back to topic, how can I wait for an MDI-Child to close? Some example code:

  public void DoSomething() {
    String searchterm = this.TextBox1.Text;
    MyItem result = MySearchForm.GetItem(searchterm);

    if(MyItem != MyItem.Empty) {
        // do something
    }
  }

MySearchForm is a MDI-Child of the main window, so I can't use ShowDialog(), but I'd still like to use a blocking method to wait for the window to close and return the result. I thought about calling it on another thread and wait for that one to exit, but that also doesn't work with MDI.

Does somebody have an idea?

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亽野灬性zι浪 2024-09-14 11:07:16

在 MDI 应用程序中使用对话框是很正常的，它并不违反 MDI 约定。只是不要将其设为 MDI 子窗口。这很糟糕，因为你无法使其成为模态。如果您将其设置为非模态，那么当用户最小化窗口时会发生令人困惑的事情。

只需使用 ShowDialog(owner) 或 Show(owner) 方法（分别为模式和非模式）并将 MDI 父级作为所有者传递。该对话框将始终位于子窗口的顶部。您通常确实需要 StartPosition = Manual 并设置 Location，以便可以确保它在父框架内的适当位置启动。

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孤云独去闲 2024-09-14 11:07:16

尝试禁用主窗体，然后在子窗体关闭时重新启用它。有点像这样：

  public void DoSomething() 
  {
    searchForm.Show();
    searchForm.SearchTerm = this.TextBox1.Text;
    searchForm.FormClosing += new FormClosingEventHandler(searchForm_FormClosing);

    this.Enabled = false
  }

  void searchForm_FormClosing(object sender, FormClosingEventArgs e)
  {
    this.Enabled = true;

    // Get result from search form here
    MyItem result = searchForm.GetItem();
    if(MyItem != MyItem.Empty) // do something
  }

Try disabling the main form, then re-enabling it when the child form closes. It would be a bit like this:

  public void DoSomething() 
  {
    searchForm.Show();
    searchForm.SearchTerm = this.TextBox1.Text;
    searchForm.FormClosing += new FormClosingEventHandler(searchForm_FormClosing);

    this.Enabled = false
  }

  void searchForm_FormClosing(object sender, FormClosingEventArgs e)
  {
    this.Enabled = true;

    // Get result from search form here
    MyItem result = searchForm.GetItem();
    if(MyItem != MyItem.Empty) // do something
  }

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眼前雾蒙蒙 2024-09-14 11:07:16

重载主窗口的FormClosing事件：

void MyForm_FormClosing(object sender, FormClosingEventArgs e)
{
    if (e.CloseReason == CloseReason.UserClosing)
    {
        // User clicked the close button.
        // Cancel if dialogs are open.
        if (dialogsOpen)
        {
            e.Cancel = true;
        }
    }
}

Overload the FormClosing event of the main window:

void MyForm_FormClosing(object sender, FormClosingEventArgs e)
{
    if (e.CloseReason == CloseReason.UserClosing)
    {
        // User clicked the close button.
        // Cancel if dialogs are open.
        if (dialogsOpen)
        {
            e.Cancel = true;
        }
    }
}

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