Question

I am making a simple wizard. I created one static class for holding my forms:

    namespace LABEL_AUTOMATION
    {
        static class ProjectHelper
        {
            public static Form1 frm1 = new Form1();
            public static Form2 frm2 = new Form2();
        }

    }

and for form1’s next button I am having the following code:

 private void buttonNext_Click(object sender, EventArgs e)
    {
        this.Visible = false;
        ProjectHelper.frm2.Visible = true;
    }

and similar logic for form2’s back button:

private void buttonPrevious_Click(object sender, EventArgs e)
{
    this.Visible = false;
    ProjectHelper.frm1.Visible = true;
}

The problem is that when I move between the forms, the values of the controls like textbox gets cleared.

How to correct it ?

Also, I am using the form’s visible changed event to execute the code when the user switches between forms. But, the event gets fired before the form gets visible. Any other event that I can use ?

EDIT: I actually didnt change the Program.cs file which was actually creating and running a seperate instance of Form1. So I changed my code to:

static void Main()
{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    ProjectHelper.frm1.Show();
}  

But it is giving the following error:

The type initializer for 'LABEL_AUTOMATION.ProjectHelper' threw an exception.

Answer 1

I think you are showing/hiding instances of your forms which are not in ProjectHelper class.

You should at Main do

ProjectHelper.frm1.Show();

or

ProjectHelper.frm2.Show();