如何使用form1关闭form2？ [英] How to close form2 using form1?

问题描述

How to Close form2 using form1?

我尝试过：



private void button_Click（object sender，EventArgs e）

if（radio1.Checked）

{

关闭frm2 = new关闭（）;

f2.Close（）;

}

What I have tried:

private void button_Click (object sender, EventArgs e)
if (radio1.Checked)
{
Close frm2 = new Close();
f2.Close();
}

推荐答案

假设这是：



1. WinForms



2. Form1是主要表格创建并显示

'f2表格



3. Button和RadioButton在Form1上

Assuming this is:

1. WinForms

2. Form1 is the main Form which created, and made visible, the
'f2 Form

3. the Button and RadioButton are on Form1

private void button_Click (object sender, EventArgs e)
{    
    if (radio1.Checked)
    {
        if(f2 != null) f2.Close();
    }
}

你在这里使用CheckBox吗？为什么你甚至需要一个按钮？你检查处理它的想法似乎很奇怪。



考虑你是否应该隐藏而不是关闭'f2。



...编辑...复选框示例

Should you be using a CheckBox here ? Why do you even need a Button ? The idea you check something to dispose it seems odd.

Consider if you should hide, rather than close, 'f2.

... edit ... CheckBox example

Form2 f2 = new Form2();

const string CbxShowTxt = "Show Second Form";
const string CbxHideTxt = "Hide Second Form";

private void Form1_Load(object sender, EventArgs e)
{
    checkBox1.Text = CbxShowTxt;
    checkBox1.Checked = false;
}

private void checkBox1_CheckStateChanged(object sender, EventArgs e)
{
    if (checkBox1.Checked)
    {
        f2.Show();
        checkBox1.Text = CbxHideTxt;
    }
    else
    {
        f2.Hide();
        checkBox1.Text = CbxShowTxt;
    }
}

...结束编辑...

... end edit ...

试试这样

Try like this

Form2 obj = (Form2)Application.OpenForms["Form2"];
obj.Close();

试试这个...

try this...

if (radio1.Checked == true)
{
Form1 frm = new Form1();
frm.Show();
this.Hide();
}

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