transfering item from one listbox to another

Milos

 private void ChangeTab(object sender, EventArgs e)

        {

            if (tabControl1.SelectedIndex == 1)                 

            {

                listBox1.Items.Clear();

                listBox2.Items.Clear();

                foreach (Value mn in ValueList)

                {

                    listBox2.Items.Add(mn.getName());

                }

            }

            if (tabControl1.SelectedIndex == 0)

            {

                listBox1.Items.Clear();

                listBox2.Items.Clear();

                foreach (Value mn in ValueList)

                {

                    listBox1.Items.Add(mn.getName());

                }

            }

        }

What's the error in this code?I want to show value from listbox1 to listbox2?

5 Replies

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Nilanka Dharmadasa16y ago
Accepted answer
Hi Milos,

Did you bind the 'ChangeTab' method to TabControl's 'SelectedIndexChanged' event? If you didnt do that, you can do that by adding following line in red to your form constructor as given below.

        public Form1()
        {
            InitializeComponent();
        this.tabControl1.SelectedIndexChanged += new System.EventHandler(this.ChangeTab);

        }

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Milos16y ago
Problem solved.Thank you all!
Sam Hobbs16y ago
Okay well I don't know what ValueList is but note that you clear both listboxes before adding values to one of them, so if you are trying to copy the contents of one listbox to the other listbox and if ValueList is the contents of one of the listboes, then perhaps there is no data to copy since you cleared both listboxes.
Milos16y ago
When I change tabpage,value from listbox1, need to show in listbox2. I offered to do that with code above,but listbox2 don't accept value. J don't know why? My english is problematical,don't take amis.
Sam Hobbs16y ago
The way that forums such as this work is that you tell us the problem and then someone helps you solve the problem. Most people that try to help are not psychic; we need to know what the error is. If you can tell us the error message then someone will help solve the problem.