使用VC＃GUI表单

Question

Hi I am a new programmer and i just wannna know that why can't we close an hide our VC# form with the help of following code -

private void button1_Click(object sender, EventArgs e)
{
Form1 frmobj = new Form1();
frmobj.Close();
frmobj.Hide();
}

We can do the same thing with the help of following code-

private void button1_Click(object sender, EventArgs e)
{
this.Close();
this.Hide();
}

Please tell me why can't we close and Hide the current form with the help of new instance of Form1.

Answer 1

Your code is trying to close and hide the new form, not the current one.

this.Close();

means to close the current form.

You can't close the new form before you have even shown it.

Answer 2

调用Close方法，关闭并处理该表单，这意味着在该方法调用之后，该表单的实例不再存在，因此，您无法在该实例上调用任何其他成员方法，因为该实例不存在不再（已处置）。