devxlogo

Determine Whether or Not a Form Is Open

Why Trust Us

Sometimes in the myriad of forms, it can become quite difficult figuring out whether or not a form has already been loaded and if is still open or not. To determine if a form has already been loaded into memory, you can use the following procedure that makes use of LINQ which queries the Applicaction.OpenForms collection:

private void CheckForms()        {            var frm = Application.OpenForms.Cast().Where(x = x.Name == "Form1").FirstOrDefault();            if (null != frm)            {                frm.Show();                frm.Activate();                frm.BringToFront();            }            else            {                Form1 frm = new Form1;                frm.Show();                frm.Activate();                frm.BringToFront();            }                        }

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.

Disclosure

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

Show More