show form once

[hastk]

Please tell me how to show a form only once ? Form frm=new MyForm(); frm.show(); this code will open new form each time I am calling it. thank you

[LiquidE_SA]

try showDialog() instead of show(). I don't know if this will work, but try it.

ASBESTOS-Greetings LiquidE

[Jon Hulatt]

If you don't know if it'll work, then why bother posting? Tat like that devalues the usefulness of the forums.

using System.Beer;

[Jon Hulatt]

If you define a member variable in your class, then you can test whether the member is null or not to decide whether to show the form:-

class MyClass
{
...

MyForm m_frm;

public void OnButton1Click(object sender, EventArgs e)
{
if (m_frm == null)
{
m_frm = new MyForm();
m_form.Show();
}
}
}

The problem with that is that if the user closes the form, they'll not be able to reopen it. To do that you'd need to handle the form's Closing event, and set the m_frm reference to null.

using System.Beer;