在列表框中获取选定的项目ID

Question

How do I get the select item in a listbox and pass it on to another class. At the moment it does display the item id.

 private void moveup_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < listBox1.SelectedItems.Count; i++)
            {
                MessageBox.Show(listBox1.SelectedItems[i].ToString());

            }
        }

any help appreciated.

Answer 1

Try this one, use SelectedItems[i].Text instead of SelectedItems[i].ToString()

private void moveup_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < listBox1.SelectedItems.Count; i++)
            {
                MessageBox.Show(listBox1.SelectedItems[i].Text);

            }
        }

Answer 2

If I understand you correctly, you want the text from the listbox? Instead of .ToString(), use .text

 private void moveup_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < listBox1.SelectedItems.Count; i++)
            {
                MessageBox.Show(listBox1.SelectedItems[i].text);

            }
        }

To pass it to another class, you can then use it as a parameter or save it as an independent variable, or save the selected items to a list, then pass that to a class.

Hope that helps.

Answer 3

您可以将对象添加到接受对象的列表框集合中，然后将选定的项目转换为您使用的任何类型。

Answer 4

what exactly do you mean by passing it a to a new class?

if you are creating a new class, you can use it in the constructor, by defining a constructor which accepts a string parameter

if you are setting property of a class, you can pass it as a parameter to a public method of the class or you can set it directly too.

Answer 5

let the list box is lstOptions.

So lstOptions.SelectedItems[0].text

Gives you first selected item's TEXT in the listbox.

Answer 6

您可以将所选项目转换为目标类型，然后将其传递给另一个对象。

otherObject.PassObject(listBox1.SelectedItems as WhatEver);