How can I remove item (entry from textbox) in listbox

Question

In my form have TextBox1 and ListBox1, buttonAdd, buttonRemove

buttonAdd => OK, I can do it. buttonRemove: When you delete a section: - Delete entry from textbox: Check one item in the listbox item should be deleted, if there are clear, if not, the message is not found - Delete the selected item in listbox

This is my idea:

     private void butonRemove_Click(object sender, EventArgs e)
    {
        if (textbox1.Text != "")
        {
            int i = 0;
            while (i <= listbox1.Items.Count)
            {
                string Item_remove = textbox1.Text;
                if (listbox1.Items[i].ToString().Contains(Item_remove))
                {
                    DialogResult conf_remove;
                    conf_remove = MessageBox.Show("Do you wwant to remove: " + listbox1.Items[i].ToString(), "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
                    if (conf_remove == DialogResult.Yes)
                    {
                        listbox1.Items.RemoveAt(i);
                        break;
                    }
                    else if (conf_remove == DialogResult.No)
                        i++;
                }
                else
                {
                    MessageBox.Show("Not found");
                    break;
                }
            }

            textbox1.Text = "";
            textbox1.Focus();
        }
        else if (listbox1.SelectedIndex < 0)
            MessageBox.Show("Please select item to remove");
        else
            listbox1.Items.Remove(listbox1.SelectedItem);

}

Please help me fix it, thank

Answer 1

This is what you are looking for, this controls all of the validation you need too.

if (ListBox.SelectedIndex == -1)
        {
            if (ListBox.NumberOfItems == 0) // if no index, need to select a row!
            {
                MessageBox.Show("No items to remove!");
            }
            else
            {
                MessageBox.Show("Please select an item first!");
            }
        }
        else
        {
             ListBox.Items.RemoveAt(lstStorage.SelectedIndex);
        }

This will remove the item that has been selected, with the validation that you require.

I have also commented some code to show you what parts mean. If you need any more explanations on how this works then just ask :)

Answer 2

Something like this?

void buttonRemove_Click(object sender, EventArgs e) 
{
    string matchcode = TextBox1.Text;

    ListItem item = this.ListBox1.Items.FindByText(matchcode);

    if (item != null)
    {
        //found
        this.ListBox1.Items.Remove(item);
    }
    else
    {
        //not found
        MessageBox.Show("is not found");
    }
}

Answer 3

Here's the code for remove item.

private void buttonRemove_Click(object sender, EventArgs e) {
        if (listBox1.SelectedIndex == -1) { // Not Selected Anything
            MessageBox.Show("Select an item to delete");
        }
        else {
            listBox1.Items.RemoveAt(listBox1.SelectedIndex); // Remove item
        }
    }