c#实现Winform中的分页

发现在winform中的DataGridView居然是没有分页的，本来准备去写个但是又没那么多时间去构思就在园子里面找了一个，我把修改以后的发上来已经添加了注释，原出处为：http://www.cnblogs.com/flood/archive/2005/05/13/154527.html；非常感谢原作者；

设计部分：页面

 

  #region 组件设计器生成的代码

        /// <summary> 
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.btnGo = new System.Windows.Forms.Button();
            this.lblPageNum = new System.Windows.Forms.Label();
            this.txtBxNumber = new System.Windows.Forms.TextBox();
            this.lnkLast = new System.Windows.Forms.LinkLabel();
            this.lnkNext = new System.Windows.Forms.LinkLabel();
            this.lnkPrev = new System.Windows.Forms.LinkLabel();
            this.lnkFirst = new System.Windows.Forms.LinkLabel();
            this.SuspendLayout();
            // 
            // btnGo
            // 
            this.btnGo.Location = new System.Drawing.Point(263, 3);
            this.btnGo.Name = "btnGo";
            this.btnGo.Size = new System.Drawing.Size(34, 23);
            this.btnGo.TabIndex = 48;
            this.btnGo.Text = "GO";
            this.btnGo.UseVisualStyleBackColor = true;
            this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
            // 
            // lblPageNum
            // 
            this.lblPageNum.AutoSize = true;
            this.lblPageNum.Location = new System.Drawing.Point(322, 9);
            this.lblPageNum.Name = "lblPageNum";
            this.lblPageNum.Size = new System.Drawing.Size(35, 12);
            this.lblPageNum.TabIndex = 47;
            this.lblPageNum.Text = "1/1页";
            // 
            // txtBxNumber
            // 
            this.txtBxNumber.Location = new System.Drawing.Point(222, 5);
            this.txtBxNumber.Name = "txtBxNumber";
            this.txtBxNumber.Size = new System.Drawing.Size(24, 21);
            this.txtBxNumber.TabIndex = 46;
            // 
            // lnkLast
            // 
            this.lnkLast.AutoSize = true;
            this.lnkLast.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.lnkLast.LinkColor = System.Drawing.Color.Black;
            this.lnkLast.Location = new System.Drawing.Point(175, 9);
            this.lnkLast.Name = "lnkLast";
            this.lnkLast.Size = new System.Drawing.Size(41, 12);
            this.lnkLast.TabIndex = 45;
            this.lnkLast.TabStop = true;
            this.lnkLast.Text = "最后页";
            this.lnkLast.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkLast_LinkClicked);
            // 
            // lnkNext
            // 
            this.lnkNext.AutoSize = true;
            this.lnkNext.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.lnkNext.LinkColor = System.Drawing.Color.Black;
            this.lnkNext.Location = new System.Drawing.Point(126, 9);
            this.lnkNext.Name = "lnkNext";
            this.lnkNext.Size = new System.Drawing.Size(41, 12);
            this.lnkNext.TabIndex = 44;
            this.lnkNext.TabStop = true;
            this.lnkNext.Text = "下一页";
            this.lnkNext.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkNext_LinkClicked);
            // 
            // lnkPrev
            // 
            this.lnkPrev.AutoSize = true;
            this.lnkPrev.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.lnkPrev.LinkColor = System.Drawing.Color.Black;
            this.lnkPrev.Location = new System.Drawing.Point(77, 9);
            this.lnkPrev.Name = "lnkPrev";
            this.lnkPrev.Size = new System.Drawing.Size(41, 12);
            this.lnkPrev.TabIndex = 43;
            this.lnkPrev.TabStop = true;
            this.lnkPrev.Text = "上一页";
            this.lnkPrev.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkPrev_LinkClicked);
            // 
            // lnkFirst
            // 
            this.lnkFirst.AutoSize = true;
            this.lnkFirst.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.lnkFirst.LinkColor = System.Drawing.Color.Black;
            this.lnkFirst.Location = new System.Drawing.Point(30, 9);
            this.lnkFirst.Name = "lnkFirst";
            this.lnkFirst.Size = new System.Drawing.Size(41, 12);
            this.lnkFirst.TabIndex = 42;
            this.lnkFirst.TabStop = true;
            this.lnkFirst.Text = "第一页";
            this.lnkFirst.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.lnkFirst_LinkClicked);
            // 
            // PaperControl
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(248)))), ((int)(((byte)(255)))));
            this.Controls.Add(this.btnGo);
            this.Controls.Add(this.lblPageNum);
            this.Controls.Add(this.txtBxNumber);
            this.Controls.Add(this.lnkLast);
            this.Controls.Add(this.lnkNext);
            this.Controls.Add(this.lnkPrev);
            this.Controls.Add(this.lnkFirst);
            this.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(40)))), ((int)(((byte)(78)))), ((int)(((byte)(151)))));
            this.Name = "PaperControl";
            this.Size = new System.Drawing.Size(386, 29);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button btnGo;
        private System.Windows.Forms.Label lblPageNum;
        private System.Windows.Forms.TextBox txtBxNumber;
        private System.Windows.Forms.LinkLabel lnkLast;
        private System.Windows.Forms.LinkLabel lnkNext;
        private System.Windows.Forms.LinkLabel lnkPrev;
        private System.Windows.Forms.LinkLabel lnkFirst;

 

cs代码：

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace ASGExperiment.Log
{
    public partial class PaperControl : UserControl
    {
       #region 设计部分
        #region 参数及其他

        private int displayCount;
        private int perPage;
        private int pageCount;
        private int currentPage;
        private int prevPage;

        public event EventHandler currentPageChanged;

        public int DisplayCount
        {
            get { return displayCount; }
        }

        public int PerPage
        {
            get { return perPage; }
        }

        public int PageCount
        {
            get { return pageCount; }
        }

        public int CurrentPage
        {
            get { return currentPage; }
        }
        #endregion

        public PaperControl()
        {
            InitializeComponent();
            displayCount = 0;
            perPage = 0;
            pageCount = 1;
            currentPage = 1;
            prevPage = 0;

        }
       

        #endregion

        #region 核心部分


        public void Init(int count, int perpage)
        {
            displayCount = Math.Max(count, 1);
            perPage = Math.Min(perpage, displayCount);
            pageCount = displayCount / perPage;
            if (displayCount % perPage != 0)
                pageCount++;
            currentPage = 1;
            DrawControl();
        }

        private void DrawControl()
        {
            lblPageNum.Text = currentPage.ToString() + "/" + pageCount.ToString();
            if (prevPage != currentPage && currentPageChanged != null)
                currentPageChanged(this, null);
            prevPage = currentPage;
        }        

        /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void txtBxNumber_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!Char.IsNumber(e.KeyChar) && e.KeyChar != (Char)8)
                e.Handled = true;

        }

        /// <summary>
        /// 页数选择限制
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void txtBxNumber_TextChanged(object sender, EventArgs e)
        {

            if (txtBxNumber.Text.Length > 0 && int.Parse(txtBxNumber.Text) > pageCount)
            {
                txtBxNumber.Text = pageCount.ToString();
            }

        }
        
        private void btnGo_Click(object sender, EventArgs e)
        {
            //忽略错误 
            //if (txtBxNumber.Text.Length == 0 || int.Parse(txtBxNumber.Text) > pageCount)
            //    return;
            currentPage = int.Parse(txtBxNumber.Text);
            DrawControl();

        }
        #endregion

        private void lnkFirst_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            currentPage = 1;
            DrawControl();
        }

        private void lnkPrev_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            currentPage = Math.Max(1, currentPage - 1);
            DrawControl();
        }

        private void lnkNext_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            currentPage = Math.Min(pageCount, currentPage + 1);
            DrawControl();
        }

        private void lnkLast_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            currentPage = pageCount;
            DrawControl();
        }

 

引用示例：

 

 this.paperControl1.Init(count, perpage);      

 

 

Init是设置总长度和每页多少条，他会自动调用currentPageChanged的，但是控件放到页面上以后也要绑定currentPageChanged的绑定页面列表的事件，所以绑定页面列表的方法写成事件，直接绑定给控件的currentPageChanged，而没必要在Load里面再放一个绑定事件了，那样容易引起死循环（这一点很重要）

如果还有不明白的可以跟帖提出来，我们一起探讨一下！