Question

I have a very complicated windows application which has 8 forms. There are “Previous” and “Next” buttons on each form to back and forth for easily editing forms.

 private void ShowNext()
    {
        if (FormNext == null)
            FormNext = new SomeForm(this);
        FormNext.Show();
        this.Hide();
    }

    private void ShowPrev()
    {
        FormPrev.Show();
        this.Hide();
    }

    private void btnNext_Click(object sender, EventArgs e)
    {
        ShowNext();
    }

    private void btnBack_Click(object sender, EventArgs e)
    {
        ShowPrev();
    }

Each form will execute different sql insert table command. But the question is that I don’t want to finish all insertion on each form.

What I want to is to finish all in the last form once the user confirms the correct input values.
That means I have to pass all variables from the very beginning to the last one.

Question: can the memory hold all variables? How to pass them cross forms?

Thanks.

Answer 1

Define a static public field in your main form, and update the value in each sub forms. Finally select the field in your last form for insertion

Something on the following lines:

public partial class Form1 : Form //your main fomr
    {
        public static List<MyContainerClass> myContainer= new List<MyContainerClass>();
        .............

Here MyContainerClass could be some class defined in your code, which can hold all the values you want to persist. If its just a string, then you may create a list of string. Then in each form set value

Form1.myContainer.Add(new_values);

In the last form you can access the values

foreach(MyContainerClass mc in Form1.myContainer)
{
//Do your work
}