扩展BindingList，防止增加、删除项时自动更新界面而不出现“跨线程操作界面控件”异常

代码示例

using System;

using System.ComponentModel;

using System.Threading;

using System.Windows.Forms;



namespace TempForms

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();



            Initial();

        }



        private UiBindList<int> _list;

        private void Initial()

        {

            _list = new UiBindList<int> { SynchronizationContext = SynchronizationContext.Current };

            bindingSource1.DataSource = _list;



            new Thread(() =>

            {

                while (true)

                {

                    Thread.Sleep(1000);

                    var newItem = DateTime.Now.Second;

                    _list.Add(newItem);



                    Thread.Sleep(1000);

                    _list.Remove(newItem);

                }

            })

            {

                IsBackground = true,

            }

            .Start();

        }

    }



    /// <summary>

    /// 扩展BindingList，防止增加、删除项时自动更新界面而不出现“跨线程操作界面控件”异常

    /// </summary>

    class UiBindList<T> : BindingList<T>

    {

        /// <summary>

        /// 界面同步上下文

        /// </summary>

        public SynchronizationContext SynchronizationContext { get; set; }



        /// <summary>

        /// 使用此方法执行一切操作上下文相关的操作

        /// </summary>

        private void Excute(Action action, object state = null)

        {

            if (SynchronizationContext == null)

                action();

            else

                SynchronizationContext.Post(d => action(), state);



        }



        public new void Add(T item)

        {

            Excute(() => base.Add(item));

        }



        public new void Remove(T item)

        {

            Excute(() => base.Remove(item));

        }

    }

}

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