C# Winform实现自定义分页控件

        public Action<int> GetPageData { get; set; }
        private Color _FontColor;
        [Browsable(true), Description("设置字体颜色")]
        public Color FontColor
        {
            get => _FontColor; set
            {
                lb_down.ForeColor = lb_end.ForeColor = lb_go.ForeColor = lb_home.ForeColor = lb_page.ForeColor = lb_up.ForeColor = value;
            }
        }
        private int _DataCount;
        [Description("数据总数量")]
        public int DataCount
        {
            get => _DataCount;
            set
            {
                _DataCount = value;
                lb_page.Text = PageIndex + "/" + PageTotal;
            }
        }
        private int _PageSize;
        [Description("页显示数量")]
        public int PageSize
        {
            get
            {
                return _PageSize <= 0 ? 50 : _PageSize;
            }
            set
            {
                _PageSize = value;
                lb_page.Text = PageIndex + "/" + PageTotal;
            }
        }
        private int _PageTotal;
        [Description("总页数")]
        public int PageTotal
        {
            get
            {
                if (DataCount % PageSize == 0)
                {
                    _PageTotal = DataCount / PageSize;
                }
                else
                {
                    _PageTotal = DataCount / PageSize + 1;
                }
                return _PageTotal <= 0 ? 1 : _PageTotal;
            }
        }
​​​​​​​        private int _PageIndex;
        [Description("当前页数")]
        public int PageIndex
        {
            get
            {
                return _PageIndex <= 0 ? 1 : _PageIndex;
            }
            private set
            {
                _PageIndex = value;
                if (_PageIndex <= 0)
                {
                    _PageIndex = 1;
                }
                if (_PageIndex > PageTotal)
                {
                    _PageIndex = PageTotal;
                }
                if (GetPageData != null)
                {
                    GetPageData(_PageIndex);
                    lb_page.Text = _PageIndex + "/" + PageTotal;
                }
            }
        }

private void lb_home_Click(object sender, EventArgs e)
        {
            PageIndex = 1;
        }
        private void lb_up_Click(object sender, EventArgs e)
        {
            PageIndex--;
        }
        private void lb_down_Click(object sender, EventArgs e)
        {
            PageIndex++;
        }
        private void lb_end_Click(object sender, EventArgs e)
        {
            PageIndex = PageTotal;
        }
        private void lb_go_Click(object sender, EventArgs e)
        {
            if (int.TryParse(txt_num.Text, out int result))
            {
                PageIndex = result;
            }
        }
​​​​​​​        private void txt_num_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!(e.KeyChar == '\b' || (e.KeyChar >= '0' && e.KeyChar <= '9')))
            {
                e.Handled = true;
            }
        }

 private async Task GetPageData()
 {
     //...获取服务端数据的代码
     BindList.SetData(result.Data);
     pageEx1.DataCount = result.DataCount;
}

 pageEx1.GetPageData = async s =>
            {
                PageIndex = s;
                await GetPageData();
            };