WinForm ListBox 控件用法

下面演示如何利用列表控件 ListBox 实现多选与移动选项：

using IMS.WinFormClient.UserControls;
using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace IMS.WinFormClient
{
    public partial class ListBoxForm : Form
    {
        UCReport _uCReport = null; // parentForm

        public ListBoxForm(UCReport uCReport, List<KeyValuePair<string, string>> selectedPairs, List<KeyValuePair<string, string>> unselectedPairs)
        {
            InitializeComponent();

            _uCReport = uCReport;

            if (selectedPairs != null)
            {
                foreach (var field in selectedPairs)
                {
                    this.listBox2.Items.Add(field.Key);
                }
            }

            if (unselectedPairs != null)
            {
                foreach (var field in unselectedPairs)
                {
                    this.listBox1.Items.Add(field.Key);
                }
            }
        }

        //全部移动：左->右
        private void button1_Click(object sender, EventArgs e)
        {
            foreach (object o in listBox1.Items)
            {
                listBox2.Items.Add(o);
            }
            listBox1.Items.Clear();
        }

        //只移动选中项：左->右
        private void button2_Click(object sender, EventArgs e)
        {
            if (this.listBox1.SelectedItems.Count > 0)
            {
                object[] items = new object[this.listBox1.SelectedItems.Count];

                this.listBox1.SelectedItems.CopyTo(items, 0);

                foreach (var item in items)
                {
                    string selectedItem = item.ToString();
                    //判断是否添加到listbox1
                    if (!this.listBox2.Items.Contains(selectedItem))
                    {
                        //添加人员到listbox2中
                        this.listBox2.Items.Add(selectedItem);
                        //移除listbox1中
                        this.listBox1.Items.Remove(selectedItem);
                    }
                }
            }
        }

        //只移动选中项：右->左
        private void button3_Click(object sender, EventArgs e)
        {
            if (this.listBox2.SelectedItems.Count > 0)
            {
                object[] items = new object[this.listBox2.SelectedItems.Count];

                this.listBox2.SelectedItems.CopyTo(items, 0);

                foreach (var item in items)
                {
                    string selectedItem = item.ToString();
                    //判断是否添加到listbox1
                    if (!this.listBox1.Items.Contains(selectedItem))
                    {
                        //添加人员到listbox1中
                        this.listBox1.Items.Add(selectedItem);
                        //移除listbox2中
                        this.listBox2.Items.Remove(selectedItem);
                    }
                }
            }
        }

        //全部移动：右->左
        private void button4_Click(object sender, EventArgs e)
        {
            foreach (object o in listBox2.Items)
            {
                listBox1.Items.Add(o);
            }
            listBox2.Items.Clear();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            List<string> selectedFieldsList = new List<string>();
            if (this.listBox2.Items.Count > 0)
            {
                foreach (var item in this.listBox2.Items)
                {
                    selectedFieldsList.Add(item.ToString());
                }
            }
            else
            {
                MessageBox.Show("请至少选择一项");
                return;
            }

            List<string> unselectedFieldsList = new List<string>();
            if (this.listBox1.Items.Count > 0)
            {
                foreach (var item in this.listBox1.Items)
                {
                    unselectedFieldsList.Add(item.ToString());
                }
            }

            // 通知父窗体更新需要显示的字段
            _uCReport.CustomFeildsEvent(selectedFieldsList, unselectedFieldsList);

            this.Close();
        }
    }
}

运行结果：

更全面的功能可以参考微软的 SQL Server Business Inteligence 的 Integration Services 项目下的选择界面：

（打开vs->新建Integration Services项目->添加数据源视图->选择3个下一个即可看到以下界面）