How to share the same window

Question

Dear All,

I have a form, StudentList.cs, that displays the names of all students. Users can double-click on a name of a single student to view the details of that student on another form. However, when the user double-clicks on the name of other students, a new form will be open. My question is how to automatically close the form of the prior student and display the details of another student in the same position. That is how to share the same window for all students' details.

Answer 1

You can create the Form only if it does not exist yet
Something like this =>

    Student_Form form2 = null;  

    private void StudentList_dataListView_MouseDoubleClick(object sender, EventArgs e)  
    {  
        if (form2 == null || form2.IsDisposed)  
        {  
            form2 = new Student_Form();  
            form2.Owner = this;  
        }  
        // controls must be Public  
        form2.labelID.Text = dataListView1.SelectedItem.SubItems[0].Text;   
        form2.textBoxFirstName.Text = dataListView1.SelectedItem.SubItems[1].Text;  
        form2.textBoxLastName.Text = dataListView1.SelectedItem.SubItems[2].Text;  
        form2.textBoxLocation.Text = dataListView1.SelectedItem.SubItems[3].Text;  
        form2.Show();  
    }