WinForm应用程序:在另一个表单关闭后，按钮禁用了吗?

问题描述

您好WinForm App专家，

你能告诉我这是否可行:

1. Form1 Button1_Click-> Form2 Show()，Form1 Button1禁用
//上面的第一个事件显然没有问题！

2. Form2已关闭-> Form1 Button1启用
//直到现在我都无法做到这一点


为什么我要这样做?因为我必须使用Show()方法而不是ShowDialog()，所以form1和form2可以并行操作.但是问题是，我希望仅在关闭form2时才启用form1中的button1.

是否可以以注释形式控制控件?我看到了有关c#的文章，但是当我在C ++/CLI中翻译"它们时，它似乎不起作用.
因此，我使用了varible来启用button1.同样在关闭Form2时，请执行a = 1;
我想在form1的事件中获得a = 1，但找不到合适的那个.
当我的想法不可能的时候.您能给我您的建议吗?

提前谢谢！


大家好，

现在它可以与Marcus的c#代码很好地配合使用.但我也想将其写入C ++/CLI，但我不太了解(o，arg)=>"是什么.是.是所谓的"lambda表达式"吗?应该如何用C ++/CLI编写?
我至少知道"var form2Obj = new Form2();"在C ++/CLI中应该这样:

Hello WinForm App experts,

Could you tell me if this is possible:

1. Form1 Button1_Click -> Form2 Show(), Form1 Button1 disable
// The first event above is clearly no prolem!

2. Form2 closed -> Form1 Button1 enable
// I can''t make this till now


Why I want to do this? Because I must use Show() method instead of ShowDialog(), so that the form1 and form2 can be operated parallelly. But the problem is that, I want the button1 in form1 only to be enabled while form2 is closed.

Is controlling a control in anoter form possible? I saw articles for c#, but when I "translate" them in C++/CLI, it doesn''t seem to work.
So I used varible to enable the button1. Also when Form2 Closing, do a=1;
I want get the a=1 in an event for form1, but I can''t find a suitable one.
When my idea is impossible. Could you give me your advices?

Thank you in advance!


Hi mates,

now it works well with Marcus'' c# code. But I also want to write it into C++/CLI, and I don''t quite understand what "(o, arg)=>" is. Is it the so-called "lambda expression"? How should it be written in C++/CLI?
I know at least that the "var form2Obj = new Form2();" should like this in C++/CLI:

auto form2Obj = gcnew Form2();

感谢您的帮助！

Thank you for helping!

推荐答案

// In Form1 code
private void OnOpenForm2Click(object sender, EventArgs e)
{
   var form2Obj = new Form2();
   form2Obj.Shown += (o, args) => { btnOpenForm2.Enabled = false; };
   form2Obj.FormClosed += (o, args) => { btnOpenForm2.Enabled = true; };
   form2Obj.Show();
}

private void button1_Click(object sender, EventArgs e)
{
    button1.Visible = false;
    // pass in the button into Form2
    Form2 f = new Form2(ref button1);
    f.Show();
}

然后，在Form2关闭期间，再次使按钮可见.
示例:

Then, during Form2 is closing, make the button visible again.
Example:

public partial class Form2 : Form
{
    Button btForm1 = null;

    // Receive button1 control from Form1
    public Form2(ref Button bt)
    {
        btForm1 = bt;
        InitializeComponent();
        FormClosing += new FormClosingEventHandler(Form2_FormClosing);
    }

    void Form2_FormClosing(object sender, FormClosingEventArgs e)
    {
        // make the button visible again
        btForm1.Visible = true;
    }
}

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