新分页控件

       太久没写Blog了,最近一段时间更是连博客园都没上过,繁忙的工作让我连停下来冲冲电的时间都没有(难得的空闲时间都用来魔兽世界了),最近总算有点空闲时间,看看以前写的分页控件,是在是太丑陋了,修改了一下。

       设计上的考虑,界面设计上显示总页数、当前页数、可以前翻、后翻、跳转到指定页面。页面改变时触发currentPageChanged事件,使用此控件只要调用Init(int count,int perpage)就可以了。

    注:count 是显示的总数,perpage 每页显示的个数,调用init 方法会触发currentPageChanged事件。在currentPageChanged事件处理方法中获取当前页CurrentPage

代码如下:

 

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

namespace LMAS
{
    
/// <summary>
    
/// Summary description for UserControl1.
    
/// </summary>

    public class PageControl : System.Windows.Forms.UserControl
    
{
        
private System.Windows.Forms.Label lblPageNum;
        
private System.Windows.Forms.LinkLabel lnkFirst;
        
private System.Windows.Forms.LinkLabel lnkPrev;
        
private System.Windows.Forms.LinkLabel lnkNext;
        
private System.Windows.Forms.LinkLabel lnkLast;
        
private System.Windows.Forms.TextBox txtBxNumber;
        
private System.Windows.Forms.Label label2;
        
/// <summary>
        
/// Required designer variable.
        
/// </summary>

        private System.ComponentModel.Container components = null;

        
private int displayCount;
        
private int perPage;
        
private int pageCount;
        
private System.Windows.Forms.Button btnGo;
        
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; }
        }


        
public PageControl()
        
{
            
// This call is required by the Windows.Forms Form Designer.
            InitializeComponent();
            displayCount 
= 0;
            perPage 
= 0;
            pageCount 
= 1;
            currentPage 
= 1
            prevPage 
= 0;
        }


        
/// <summary>
        
/// Clean up any resources being used.
        
/// </summary>

        protected override void Dispose( bool disposing )
        
{
            
if( disposing )
            
{
                
if( components != null )
                    components.Dispose();
            }

            
base.Dispose( disposing );
        }


        
#region Component Designer generated code
        
/// <summary>
        
/// Required method for Designer support - do not modify 
        
/// the contents of this method with the code editor.
        
/// </summary>

        private void InitializeComponent()
        
{
            
this.lblPageNum = new System.Windows.Forms.Label();
            
this.lnkFirst = new System.Windows.Forms.LinkLabel();
            
this.lnkPrev = new System.Windows.Forms.LinkLabel();
            
this.lnkNext = new System.Windows.Forms.LinkLabel();
            
this.lnkLast = new System.Windows.Forms.LinkLabel();
            
this.txtBxNumber = new System.Windows.Forms.TextBox();
            
this.label2 = new System.Windows.Forms.Label();
            
this.btnGo = new System.Windows.Forms.Button();
            
this.SuspendLayout();
            
// 
            
// lblPageNum
            
// 
            this.lblPageNum.Location = new System.Drawing.Point(00);
            
this.lblPageNum.Name = "lblPageNum";
            
this.lblPageNum.Size = new System.Drawing.Size(8823);
            
this.lblPageNum.TabIndex = 0;
            
this.lblPageNum.Text = "1/1";
            
this.lblPageNum.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
// 
            
// lnkFirst
            
// 
            this.lnkFirst.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
            
this.lnkFirst.Location = new System.Drawing.Point(880);
            
this.lnkFirst.Name = "lnkFirst";
            
this.lnkFirst.Size = new System.Drawing.Size(2423);
            
this.lnkFirst.TabIndex = 1;
            
this.lnkFirst.TabStop = true;
            
this.lnkFirst.Text = "|<";
            
this.lnkFirst.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
this.lnkFirst.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.PageLinkClicked);
            
// 
            
// lnkPrev
            
// 
            this.lnkPrev.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
            
this.lnkPrev.Location = new System.Drawing.Point(1121);
            
this.lnkPrev.Name = "lnkPrev";
            
this.lnkPrev.Size = new System.Drawing.Size(2423);
            
this.lnkPrev.TabIndex = 2;
            
this.lnkPrev.TabStop = true;
            
this.lnkPrev.Text = "<";
            
this.lnkPrev.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
this.lnkPrev.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.PageLinkClicked);
            
// 
            
// lnkNext
            
// 
            this.lnkNext.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
            
this.lnkNext.Location = new System.Drawing.Point(1441);
            
this.lnkNext.Name = "lnkNext";
            
this.lnkNext.Size = new System.Drawing.Size(2423);
            
this.lnkNext.TabIndex = 3;
            
this.lnkNext.TabStop = true;
            
this.lnkNext.Text = ">";
            
this.lnkNext.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
this.lnkNext.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.PageLinkClicked);
            
// 
            
// lnkLast
            
// 
            this.lnkLast.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
            
this.lnkLast.Location = new System.Drawing.Point(1680);
            
this.lnkLast.Name = "lnkLast";
            
this.lnkLast.Size = new System.Drawing.Size(2423);
            
this.lnkLast.TabIndex = 4;
            
this.lnkLast.TabStop = true;
            
this.lnkLast.Text = ">|";
            
this.lnkLast.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
this.lnkLast.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.PageLinkClicked);
            
// 
            
// txtBxNumber
            
// 
            this.txtBxNumber.Location = new System.Drawing.Point(2560);
            
this.txtBxNumber.Name = "txtBxNumber";
            
this.txtBxNumber.Size = new System.Drawing.Size(5621);
            
this.txtBxNumber.TabIndex = 5;
            
this.txtBxNumber.Text = "";
            
this.txtBxNumber.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
            
this.txtBxNumber.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtBxNumber_KeyPress);
            
this.txtBxNumber.TextChanged += new System.EventHandler(this.txtBxNumber_TextChanged);
            
// 
            
// label2
            
// 
            this.label2.Location = new System.Drawing.Point(3120);
            
this.label2.Name = "label2";
            
this.label2.Size = new System.Drawing.Size(2423);
            
this.label2.TabIndex = 7;
            
this.label2.Text = "";
            
this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            
// 
            
// btnGo
            
// 
            this.btnGo.Location = new System.Drawing.Point(3440);
            
this.btnGo.Name = "btnGo";
            
this.btnGo.Size = new System.Drawing.Size(4021);
            
this.btnGo.TabIndex = 8;
            
this.btnGo.Text = "跳转";
            
this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
            
// 
            
// PageControl
            
// 
            this.Controls.Add(this.btnGo);
            
this.Controls.Add(this.label2);
            
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.Controls.Add(this.lblPageNum);
            
this.Name = "PageControl";
            
this.Size = new System.Drawing.Size(40022);
            
this.ResumeLayout(false);

        }

        
#endregion



        
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;
        }


        
private void txtBxNumber_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
        
{
            
if (!Char.IsNumber(e.KeyChar) && e.KeyChar != (Char)8)
                e.Handled 
= true;
        }


        
//页数选择限制
        private void txtBxNumber_TextChanged(object sender, System.EventArgs e)
        
{
            
if (txtBxNumber.Text.Length > 0 && int.Parse(txtBxNumber.Text) > pageCount)
            
{
                txtBxNumber.Text 
= pageCount.ToString();
            }

        }


        
private void PageLinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
        
{
            LinkLabel lnkLbl 
= sender as LinkLabel;
            
if (lnkLbl == null)
                
return;
            
switch (lnkLbl.Name)
            
{
                
case "lnkFirst":
                    currentPage 
= 1;
                    
break;
                
case "lnkLast":
                    currentPage 
= pageCount;
                    
break;
                
case "lnkPrev":
                    currentPage 
= Math.Max(1,currentPage - 1);
                    
break;
                
case "lnkNext":
                    currentPage 
= Math.Min(pageCount,currentPage + 1);
                    
break;
            }

            DrawControl();
        }


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


    }

}


 

设计图如下:



posted on 2005-05-13 10:05  flood  阅读(1235)  评论(5编辑  收藏  举报

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