本文共 8160 字，大约阅读时间需要 27 分钟。

效果如下：

一、在vs中新建一個 WindowsFormsControlLibrary項目

2.代碼

using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Data;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace LWF_PageControl{
       public partial class LwfPageControl: UserControl    {
           public LwfPageControl()        {
               InitializeComponent();                    }        #region fields & properties        //current row number from        public virtual int CurRowIndexFrom        {
    get; set; }        //current row number to        public virtual int CurRowIndexTo        {
    get; set; }        /// 
        /// Current Page        /// 
        private int _PageIndex=1;        public virtual int PageIndex        {
               get {
    return _PageIndex; }            set {
    _PageIndex = value; }        }        /// 
        /// PageSize        /// 
        private int _PageSize = 100; //值可以在控件屬性中設置        public virtual int PageSize        {
               get {
    return _PageSize; }            set {
    _PageSize = value; }        }        /// 
        /// Record count        /// 
        private int _RecordCount = 0;        public virtual int RecordCount        {
               get {
    return _RecordCount; }           // set { _RecordCount = value; }        }        /// 
        /// Page count        /// 
        private int _PageCount = 0;        public  int PageCount        {
               get            {
                   if (PageSize != 0)                {
                       _PageCount = GetPageCount();                }                return _PageCount;            }        }        #endregion        #region the event when page is changed        public event EventHandler OnPageChanged;        #endregion# region PageControl Event and funtions        /// 
        /// set controls (button) enabled        /// 
        private void setControlEnabled()        {
               btnFirst.Enabled = btnGo.Enabled = btnLast.Enabled = btnNextPage.Enabled = btnPrewPage.Enabled = true;                    }        /// 
        /// Get the Page count        /// 
        /// 
           private int GetPageCount()        {
               if (PageSize == 0)            {
                   return 0;            }            int pageCount = RecordCount / PageSize;            if (RecordCount % PageSize == 0)            {
                   pageCount = RecordCount / PageSize;            }            else            {
                   pageCount = RecordCount / PageSize + 1;            }            return pageCount;        }        /// 
        /// invoke for the client        /// 
        ///         public void DrawControl(int count)        {
               _RecordCount = count;            DrawControl(false);        }        private void DrawControl(bool callEvent)        {
               txtCurPage.Text = PageIndex.ToString();            lblOfTolPage .Text = string.Format(" of {0}", PageCount.ToString());            txtPageSize.Text = PageSize.ToString();            CurRowIndexFrom = (PageIndex - 1) * PageSize + 1;            CurRowIndexTo = PageIndex *PageSize > RecordCount ? RecordCount : (PageIndex * PageSize);            lblRowInfo.Text = string.Format("{0} to {1} of [{2}]", CurRowIndexFrom.ToString(), CurRowIndexTo.ToString (), RecordCount.ToString());                   if (callEvent && OnPageChanged != null)            {
                   OnPageChanged(this, null);            }            setControlEnabled();            if (PageCount == 1) //when the page equal 1            {
                   btnFirst.Enabled = btnGo.Enabled = btnLast.Enabled = btnNextPage.Enabled = btnPrewPage.Enabled = false;            }            else                if (PageIndex == 1)            {
                   btnFirst.Enabled = btnPrewPage.Enabled = false;            }            if (PageIndex == PageCount)            {
                   btnLast.Enabled = btnNextPage.Enabled = false;            }        }        #endregion        #region button control event        private void btnFirst_Click(object sender, EventArgs e)        {
               PageIndex = 1;            DrawControl(true);        }                private void btnPrewPage_Click(object sender, EventArgs e)        {
               PageIndex = Math.Max(1, PageIndex - 1);            DrawControl(true);        }        private void btnNextPage_Click(object sender, EventArgs e)        {
               PageIndex = Math.Min(PageCount, PageIndex + 1);            DrawControl(true);        }        private void btnLast_Click(object sender, EventArgs e)        {
               PageIndex = PageCount;            DrawControl(true);        }        private void btnGo_Click(object sender, EventArgs e)        {
               int num = 0;            if (int.TryParse(txtCurPage.Text.Trim(), out num) && num > 0)            {
                   PageIndex = num;                DrawControl(true);            }        }        /// 
        ///press enter in the textbox to page        /// 
        ///         ///         private void tbToPage_KeyPress(object sender, KeyPressEventArgs e)        {
               if (e.KeyChar == (char)(13))            {
                   btnGo_Click(null, null);            }        }        #endregion        private void tbToPage_TextChanged(object sender, EventArgs e)        {
               int num = 0;            if (int.TryParse(txtCurPage.Text, out num) && num > 0)            {
                   if (num > PageCount)                {
                       txtCurPage.Text = PageCount.ToString();// the max page is Pagecount                }            }        }        private bool isTxtPageSizeChanged = false;        private  void txtPageSize_TextChanged(object sender, EventArgs e)        {
               int num = 0;            if (!int.TryParse(txtPageSize.Text.Trim(), out num) || num < 0)            {
                   num = 100;                txtPageSize.Text = "100";            }            else            {
                   isTxtPageSizeChanged = true;            }            _PageSize = num;        }        /// 
        /// when changed the pagesize , go to the first page        /// 
        ///         ///         private void txtPageSize_Leave(object sender, EventArgs e)        {
               if (isTxtPageSizeChanged)            {
                   isTxtPageSizeChanged = false;                btnFirst_Click(null, null);            }        }    }}

編譯后就可以給其它項目使用

二、在其它項目窗體中使用

1.引用該控件dll

**例子：分解1：**        private void Form1_Load(object sender, EventArgs e)        {
                           //激活OnPageChanged事件。 lwfPageControl1：控件名稱            lwfPageControl1.OnPageChanged += lwfPageControl1_OnPageChanged;            }        **分解2：** /// 
        /// 查詢按鈕事件        /// 
        private void SearchEvent()        {
               //得到全部查詢結果，注意用 Row_Number() 作為分頁的記錄篩選，然後在下面再用Linq 取出分頁記錄。 當然也可以（使用存儲過程）每次取出第 M ----N 個記錄，也是比較常用方法。            DataSet ds = sqlherpler.GetData("SELECT Row_Number() over (order by id) as rowindex,* FROM Employee", null);            queryTable = ds.Tables[0];//員工表              //調用pageControl 加載數據事件            LoadData_ForPageControl();        }        **分解3：** /// 
        /// 加载数据--for PageControl         /// 
        private void LoadData_ForPageControl()        {
                              int count = queryTable.Rows.Count; //查詢結果的記錄數            lwfPageControl2.DrawControl(count);            //使用Linq 在查詢結果表中取第 M ----N 個記錄.              var query = queryTable.AsEnumerable().Where((o) => int.Parse(o["rowindex"].ToString ()) >= lwfPageControl1.CurRowIndexFrom && int.Parse(o["rowindex"].ToString()) <= lwfPageControl1.CurRowIndexTo);             dgv1.DataSource = query.Any() ? query.CopyToDataTable
   
    ().DefaultView : null;                           }               /// 
    
       /// 控件分頁按鈕事件       /// 
       /// 
           /// 
            private void lwfPageControl1_OnPageChanged(object sender, EventArgs e)        {
               LoadData_ForPageControl();        }
   

转载地址：http://csmdi.baihongyu.com/