winform 分页控件分享（一）

以前都是从事B/S开发，由于公司有个比较大的C/S项目，在使用DATAGRIDVIEW的时候，显示数据量比较大，所以才用分页模式，也不知道这样是否正确。

想找个C/S下面的分页控件，都没有什么好的，就自己跟B/S下的分页控件，修改成WINFORM下面的。

首先创建一个用户控件名称为pager,在控件中拖入bindingNavigator和bindingSource，修改bindingNavigator，加入必要的一些控件。

效果如下：

代码实现如下：

 

namespace WindowsApp.MyControl
{
    /**//// <summary>
    /// 申明委托
    /// </summary>
    /// <param name="e"></param>
    /// <returns></returns>
    public delegate int EventPagingHandler(EventPagingArg e);
    /**//// <summary>
    /// 分页控件呈现
    /// </summary>
    public partial class Pager : UserControl
     {
        public Pager()
         {
            InitializeComponent();
        }
        public event EventPagingHandler EventPaging;
        /**//// <summary>
        /// 每页显示记录数
        /// </summary>
        private int _pageSize = 20;
        /**//// <summary>
        /// 每页显示记录数
        /// </summary>
        public int PageSize
         {
            get  { return _pageSize; }
            set
             {
                _pageSize = value;
                GetPageCount();
            }
        }

        private int _nMax = 0;
        /**//// <summary>
        /// 总记录数
        /// </summary>
        public int NMax
         {
            get  { return _nMax; }
            set
             {
                _nMax = value;
                GetPageCount();
            }
        }

        private int _pageCount = 0;
        /**//// <summary>
        /// 页数=总记录数/每页显示记录数
        /// </summary>
        public int PageCount
         {
            get  { return _pageCount; }
            set  { _pageCount = value; }
        }

        private int _pageCurrent = 0;
        /**//// <summary>
        /// 当前页号
        /// </summary>
        public int PageCurrent
         {
            get  { return _pageCurrent; }
            set  { _pageCurrent = value; }
        }


        private void GetPageCount()
         {
            if (this.NMax > 0)
             {
                this.PageCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(this.NMax) / Convert.ToDouble(this.PageSize)));
            }
            else
             {
                this.PageCount = 0;
            }
        }

        /**//// <summary>
        /// 翻页控件数据绑定的方法
        /// </summary>
        public void Bind()
         {
            if (this.EventPaging != null)
             {
                this.NMax = this.EventPaging(new EventPagingArg(this.PageCurrent));
            }

            if (this.PageCurrent > this.PageCount)
             {
                this.PageCurrent = this.PageCount;
            }
            if (this.PageCount == 1)
             {
                this.PageCurrent = 1;
            }
            lblPageCount.Text = this.PageCount.ToString();
            this.lblMaxPage.Text = "共"+this.NMax.ToString()+"条记录";
            this.txtCurrentPage.Text = this.PageCurrent.ToString();

            if (this.PageCurrent == 1)
             {
                this.btnPrev.Enabled = false;
                this.btnFirst.Enabled = false;
            }
            else
             {
                btnPrev.Enabled = true;
                btnFirst.Enabled = true;
            }

            if (this.PageCurrent == this.PageCount)
             {
                this.btnLast.Enabled = false;
                this.btnNext.Enabled = false;
            }
            else
             {
                btnLast.Enabled = true;
                btnNext.Enabled = true;
            }

            if (this.NMax == 0)
             {
                btnNext.Enabled = false;
                btnLast.Enabled = false;
                btnFirst.Enabled = false;
                btnPrev.Enabled = false;
            }
        }

        private void btnFirst_Click(object sender, EventArgs e)
         {
            PageCurrent = 1;
            this.Bind();
        }

        private void btnPrev_Click(object sender, EventArgs e)
         {
            PageCurrent -= 1;
            if (PageCurrent <= 0)
             {
                PageCurrent = 1;
            }
            this.Bind();
        }

        private void btnNext_Click(object sender, EventArgs e)
         {
            this.PageCurrent += 1;
            if (PageCurrent > PageCount)
             {
                PageCurrent = PageCount;
            }
            this.Bind();
        }

        private void btnLast_Click(object sender, EventArgs e)
         {
            PageCurrent = PageCount;
            this.Bind();
        }

        private void btnGo_Click(object sender, EventArgs e)
         {
            if (this.txtCurrentPage.Text != null && txtCurrentPage.Text != "")
             {
                if (Int32.TryParse(txtCurrentPage.Text, out _pageCurrent))
                 {
                    this.Bind();
                }
                else
                 {
                    Common.MessageProcess.ShowError("输入数字格式错误！");
                }
            }
        }

    }
    /**//// <summary>
    /// 自定义事件数据基类
    /// </summary>
    public class EventPagingArg : EventArgs
     {
        private int _intPageIndex;
        public EventPagingArg(int PageIndex)
         {
            _intPageIndex = PageIndex;
        }
    }
}

 

控件功能基本实现。

如何绑定数据呢？

 

来源：https://www.cnblogs.com/bingoyan/archive/2012/10/23/2735955.html