Winform自定义分页控件的实现

实现效果 有点丑陋 但是功能是没问题的 测试过

实现思路

先创建一个用户控件

代码实现

 public partial class PagerControl : UserControl
    {
        private int record = 0;

        /// <summary>
        /// 总记录数
        /// </summary>
        public int Record
        {
            get { return record; }
            set
            {
                record = value; 
                InitPageInfo();
            }
        }

        private int pageSize = 20;

        /// <summary>
        /// 每页条数
        /// </summary>
        public int PageSize
        {
            get { return pageSize; }
            set { pageSize = value; }
        }

        private int currentPage = 1;

        /// <summary>
        /// 当前页
        /// </summary>
        public int CurrentPage
        {
            get { return currentPage; }
            set { currentPage = value; }
        }

        public int pageNum = 0;

        /// <summary>
        /// 总页码
        /// </summary>
        public int PageNum
        {
            get
            {
                if (Record == 0)
                {
                    pageNum = 0;
                }
                else
                {
                    if (Record % PageSize > 0)
                    {
                        pageNum = Record / PageSize + 1;
                    }
                    else
                    {
                        pageNum = Record / PageSize;
                    }
                }
                return pageNum;
            }

        }

        //定义委托
        public delegate void BindHandle(object sender, EventArgs e);

        /// <summary>
        /// 绑定数据源事件
        /// </summary>
        public event BindHandle BindSource;

        public PagerControl()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnFirst_Click(object sender, EventArgs e)
        {
            if (Record > 0)
            {
                if (CurrentPage == 1)
                {
                    MessageBox.Show("当前已经是首页");
                    return;
                }
                else
                {
                    CurrentPage = 1;
                    if (BindSource != null)
                    {
                        BindSource(sender, e);
                        InitPageInfo();
                    }
                }
            }
           
        }

        private void btnPre_Click(object sender, EventArgs e)
        {
            if (Record > 0)
            {
                if (CurrentPage == 1)
                {
                    MessageBox.Show("当前已经是首页");
                    return;
                }
                else
                {
                    CurrentPage = CurrentPage - 1;
                    if (BindSource != null)
                    {
                        BindSource(sender, e);
                        InitPageInfo();
                    }
                }
            }
        }

        private void btnNext_Click(object sender, EventArgs e)
        {
            if (Record > 0)
            {
                if (CurrentPage == PageNum)
                {
                    MessageBox.Show("当前已经是末页");
                    return;
                }
                else
                {
                    CurrentPage = CurrentPage + 1;
                    if (BindSource != null)
                    {
                        BindSource(sender, e);
                        InitPageInfo();
                    }
                }
            }
        }

        private void btnLast_Click(object sender, EventArgs e)
        {
            if (Record > 0)
            {
                if (CurrentPage == PageNum)
                {
                    MessageBox.Show("当前已经是末页");
                    return;
                }
                else
                {
                    CurrentPage = PageNum;
                    if (BindSource != null)
                    {
                        BindSource(sender, e);
                        InitPageInfo();
                    }
                }
            }
        }

         private void InitPageInfo()
        {
             if (Record == 0 || (Record > 0 && CurrentPage > pageNum))
            {
                CurrentPage = 1;
            }
            lblInfo.Text = string.Format("共 {0} 条记录  共 {1} 页  当前第 {2} 页", Record, PageNum, CurrentPage);
            txtPage.Text = CurrentPage.ToString();

        }

        private void btnGo_Click(object sender, EventArgs e)
        {
            if (Record > 0)
            {
                if (!string.IsNullOrEmpty(txtPage.Text) && !Regex.IsMatch(txtPage.Text, @"^[d]*$"))
                {
                    MessageBox.Show("请正确填写页码！");
                    return;
                }
                int page = Convert.ToInt32(txtPage.Text);
                if (page == 0)
                {
                    page = 1;
                }
                if (page > PageNum)
                {
                    page = PageNum;
                }

                CurrentPage = page;
                if (BindSource != null)
                {
                    BindSource(sender, e);
                    InitPageInfo();
                }
            }

        }

        private void PagerControl_Load(object sender, EventArgs e)
        {
            if (BindSource != null)
            {
                BindSource(sender, e);
                InitPageInfo();
            }
        }
    }

使用

只要在窗体中 写好绑定方法

 private void Bind()
        {
            string start = dtpDate1.Value.ToString("yyyy-MM-dd");
            string end = dtpDate2.Value.ToString("yyyy-MM-dd");
            string team = cbxTeam.SelectedValue.ToString();
            string jieshu = cbxSFJS.SelectedValue.ToString();
            int record = 0;
            DataTable dt = eventBiz.GetEvents(start, end, team, jieshu, pagerControl1.CurrentPage, pagerControl1.PageSize,out record);
            pagerControl1.Record = record;
            
            dgvEvent.AutoGenerateColumns = false;
            dgvEvent.DataSource = dt.DefaultView;
        }

捆绑绑定事件

 /// <summary>
        /// 绑定数据源
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pagerControl1_BindSource(object sender, EventArgs e)
        {
            Bind();
        }

就可以了  需要注意的事情是由于分页控件load事件里会调用bind方法，会用到一些窗体元素的值，所以窗体元素项的初始化，应该放在窗体构造函数中，不要放在窗体load事件里。