为什么表单无法获得焦点? [英] Why Won't Form Get Focus?

问题描述

我有一个像这样模态启动的表单:

I have a form that is launched modally like this:

private void find_street_Click(object sender, EventArgs e)
{
  this.WindowState = FormWindowState.Minimized;
  Form findForm = new FindStreet();
  findForm.ShowDialog();
  this.WindowState = FormWindowState.Normal;
}

表单正确启动，光标位于第一个文本框中，其 TabIndex 设置为 1.

The form launches correctly, and the cursor is in the first text box, whose TabIndex is set to 1.

与 InitializeComponent(); 调用一起，这些命令也存在.

Along with the InitializeComponent(); call, these commands are present.

public FindStreet()
{
  InitializeComponent();
  this.TopMost = true;
  this.BringToFront();
  this.Focus();
}

我查看并尝试了许多示例.光标出现在正确的控件中，但窗体的窗口没有焦点.问题是，如果用户开始输入，即使新启动的表单可见，这些击键也不会进入文本框.

I have looked at and tried a number of examples. The cursor appears in the correct control, but the form's window does not have the focus. The problem is that if a user starts typing, even though the newly launched form is visible, those keystrokes are not going into the text box.

推荐答案

删除public FindStreet()中的代码，并在FindStreet的加载事件中添加:

Remove the code in public FindStreet() and in load event of FindStreet add:

this.TopMost = true; //i don't know why you need this.
this.Activate();

当您最小化主窗体时，z 顺序中的下一个获取光标.this.Focus() 什么都不做.您需要激活对话框.

When you minimize your main form the next one in z-order get the cursor. this.Focus() doesn't do anything. You need to Activate the dialog.

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