Form 2 With ListBox Value Pass In Form4 Label "Help Me"

Question

this listbox value pass in Form 4 If I Will Select i Will Try This Command

  Form4 f4 = new Form4();
  F4.label.Text = lisbox1.Selectitem.Tostring();

I Will Select Control SelectIndexChanger

this Is label Form4 select listbox value Show here

The (imho) easiest and cleanest way to share this information is by having the forms share a model. There are many examples about MVC in Winforms, just hack it into your search engine of choice. — Fildor, Oct 16 '20 at 08:28
For send value between forms, see this post https://stackoverflow.com/q/60292238/2133965 — VietDD, Oct 16 '20 at 16:05

score 2 · Answer 1 · answered Oct 16 '20 at 09:09

2

You can pass parameters through the constructor

Form 4

public partial class Form4 : Form
    {
        public Form4(string value)
        {
            F4.label.Text = value;
        }
    }

In Form 1

 Form4 form = new Form4(lisbox1.Selectitem.Tostring());
 form.ShowDialog();

Hope to help you

answered Oct 16 '20 at 09:09

cuong nguyen manh

Error Give System.NullReferenceException: 'Object reference not set to an instance of an object.' label1 was null. – WINTER CLOUD Oct 16 '20 at 09:31
Try to add `InitializeComponent();before F4.label.Text = value; – cuong nguyen manh Oct 16 '20 at 10:06
In Which Form public Playlist() { InitializeComponent(); Main main = new Main(); } – WINTER CLOUD Oct 16 '20 at 10:38
public partial class Form4 : Form { public Form4(string value) { label1.Text = value; } public Form4() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Form2 f2 = new Form2(); f2.Show(); } – WINTER CLOUD Oct 16 '20 at 10:44
Make A Video For Exapmle Stay On Same Page Value but Result give me on show Dilago – WINTER CLOUD Oct 16 '20 at 10:47
I think you need use parent form. May be https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.containercontrol.parentform?view=netcore-3.1 can help you – cuong nguyen manh Oct 19 '20 at 03:52
label show me in with showdialog (); or label show me without showdialog – WINTER CLOUD Nov 03 '20 at 20:06

1 Answers1