在后台单击表单时，Datagridview 将消失 [英] Datagridview shall disappear when clicking on the Form in the background

问题描述

如标题所述，我有一个前面带有 Datagridview 的表单.datagridview 比我后面的表单小，我希望 Datagridview 在我单击除 Datagridview 之外的任何其他地方时消失.

As described in the title, I have a Form with a Datagridview on the front. The datagridview is smaller than my form in the back and I want the Datagridview to disappear whenever I click anywhere else but the Datagridview.

我的代码如下:

this.dataGridView1.Leave += new System.EventHandler(this.focus);

Eventhandler 定义如下:

and the Eventhandler is defined like this:

private void focus(object sender, EventArgs e)
{ 
     if(dataGridView1.Focused == false)
     {
         dataGridView1.Visible = false;
     }
}

我的问题是我的 Datagridview 仅在表单中的新事件被激活时消失，而不是在我单击表单上的文本框时消失.

My problem is that my Datagridview only disappears when a new event in my form is activated but not when I click for example in a textbox on my form.

有人可以帮我吗?

推荐答案

如果您单击 Form 或 ToolStripButton<，Leave 事件不会引发/code>、PictureBox 或任何其他不可选择的控件.

The Leave event will not raise if you click on Form, or a ToolStripButton, PictureBox or any other non-selectable control.

如果您期望下拉列表之类的行为，您可以在 ToolStripControlHost 中托管 DataGridView 并使用 ToolStripDropDown 显示它.这样当你点击`DataGridView 之外的任何地方时，它就会消失.它就像一个下拉菜单.网格也可以比你的表单大:

If you expect a behavior like a dropdown, you can host DataGridView in a ToolStripControlHost and show it using a ToolStripDropDown. This way when you click anywhere outside the `DataGridView, it will disappear. It will act like a dropdown menu. Also the grid can be larger than your form:

private void button1_Click(object sender, EventArgs e)
{
    this.dataGridView1.Margin = new Padding(0);
    var host = new ToolStripControlHost(this.dataGridView1);
    this.dataGridView1.MinimumSize = new Size(200, 100);
    host.Padding = new Padding(0);
    var dropdown = new ToolStripDropDown();
    dropdown.Padding = new Padding(0);
    dropdown.Items.Add(host);
    dropdown.Show(button1, 0,button1.Height);
}

重要提示: 这是一个例子.在现实世界的应用程序中最好注意处理对象.例如，只使用一个 ToolStripdropDown 并在关闭表单时处理它.

Important Note: It's an example. It's better to pay attention to disposing of objects in a real world application. For example, use just a single ToolStripdropDown and dispose it when closing the form.

这篇关于在后台单击表单时，Datagridview 将消失的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！