.net编程

开发平台：
C#

UserControlPage.ascx.cs：源码内容
							﻿using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class UserControl_UserControlPage : System.Web.UI.UserControl
{
    //protected System.Web.UI.WebControls.Label lblTotal;
    //protected System.Web.UI.WebControls.Label labOf;
    //protected System.Web.UI.WebControls.TextBox txtCurrentPage;
    //protected System.Web.UI.WebControls.Button btnGo;
    //protected System.Web.UI.WebControls.LinkButton btnFirstPage;
    //protected System.Web.UI.WebControls.LinkButton btnPrevPage;
    //protected System.Web.UI.WebControls.LinkButton btnNextPage;
    //protected System.Web.UI.WebControls.LinkButton btnLastPage;
    int size = 10;//可以在web.config中配置
    public event System.EventHandler NavigationClick;
    protected void Page_Load(object sender, EventArgs e)
    {
        this.txtCurrentPage.Attributes.Add("onkeypress", "callButtonEvent();");
        this.btnGo.Attributes.Add("onclick", "check();");
        if (!this.IsPostBack)
        {
            SetStyle();
            SetEnable();
        }
    }
    #region Web Form Designer generated code
    override protected void OnInit(EventArgs e)
    {
        //
        // CODEGEN: This call is required by the ASP.NET Web Form Designer.
        //
        InitializeComponent();
        base.OnInit(e);
        this.btnFirstPage.Click += new System.EventHandler(this.btnGo_Click);
        this.btnPrevPage.Click += new System.EventHandler(this.btnGo_Click);
        this.btnNextPage.Click += new System.EventHandler(this.btnGo_Click);
        this.btnLastPage.Click += new System.EventHandler(this.btnGo_Click);
        this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
    }
    /// <summary>
    ///        Required method for Designer support - do not modify
    ///        the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.Load += new System.EventHandler(this.Page_Load);
    }
    #endregion
    #region btnGo_Click
    private void btnGo_Click(object sender, System.EventArgs e)
    {
        LinkButton linkbtn = sender as LinkButton;
        if( null == linkbtn )//button
        {
            Button btn = sender as Button;
            if( null == btn )
            {
                return;
            }
            else
            {
                int selPage = -1;
                try
                {
                    selPage =Int32.Parse(txtCurrentPage.Text);
                }
                catch
                {
                    selPage = -1;
                }
                if (selPage > 0 && selPage <= PageCount)
                {
                    ViewState["CurrentPageIndex"]  = selPage;
                }
                else
                {
                    return;
                }
            }
        }
        else//linkbutton
        {
            switch ( linkbtn.CommandArgument.Trim() )
            {
                case "First":
                    ViewState["CurrentPageIndex"] = 1;
                    break;
                case "Prev":
                    ViewState["CurrentPageIndex"] = (CurrentPageIndex > 1) ? CurrentPageIndex - 1 : 1;
                    break;
                case "Next":
                    ViewState["CurrentPageIndex"] = (PageCount > CurrentPageIndex) ? CurrentPageIndex + 1 : PageCount;
                    break;
                case "Last":
                    ViewState["CurrentPageIndex"]  = PageCount;
                    break;
                case "Go":
                    int selPage = -1;
                    try
                    {
                        selPage = Int32.Parse(txtCurrentPage.Text);
                    }
                    catch
                    {
                        selPage = -1;
                    }
                    if (selPage > 0 && selPage <= PageCount)
                    {
                        ViewState["CurrentPageIndex"] = selPage;
                    }
                    else
                    {
                        return;
                    }
                    break;
                default:
                    break;
            }
        }
        SetEnable();//设置显示样式
        if (NavigationClick!=null)//调用事件 
        {
            NavigationClick( sender,e );
        }
    }
    #endregion
    #region SetStyle
    private void SetStyle()
    {
        this.btnFirstPage.Attributes["style"] = "CURSOR: hand";
        this.btnLastPage.Attributes["style"] = "CURSOR: hand";
        this.btnNextPage.Attributes["style"] = "CURSOR: hand";
        this.btnPrevPage.Attributes["style"] = "CURSOR: hand";
    }
    #endregion
    #region SetEnable
    // 应根据当前的CurrentPageIndex和pageCount设定哪些按钮可用        
    private void SetEnable()
    {
        this.ltTotal.Text = PageCount.ToString();
        this.lbCurrent.Text = CurrentPageIndex.ToString();
        
        txtCurrentPage.Text =CurrentPageIndex.ToString();
        
        btnPrevPage.Enabled = false;
        btnNextPage.Enabled = false;
        
        if( PageCount >1 )
        {                    
            btnFirstPage.Enabled = btnPrevPage.Enabled = ( CurrentPageIndex >1 );
            btnNextPage.Enabled = btnLastPage.Enabled = ( CurrentPageIndex < PageCount );
        }
        else
        {                
            btnFirstPage.Enabled = false;
            btnLastPage.Enabled = false;
            btnPrevPage.Enabled = false;
            btnNextPage.Enabled = false;
        }
    }
    
    #endregion
    #region Property
    //获取或设置当前显示页的索引。                
    public int CurrentPageIndex
    {
        get
        {
            object cpage = ViewState["CurrentPageIndex"];
            int pindex = (cpage == null) ? 1 : (int)cpage;
            if (pindex > PageCount && PageCount > 0)
                return PageCount;
            else if (pindex < 1)
                return 1;
            return pindex;
        }
        set
        {
            int cpage = value;
            if (cpage < 1)
                cpage = 1;
            else if (cpage > this.PageCount)
                cpage = this.PageCount;
            ViewState["CurrentPageIndex"] = cpage;
        }
    }
    // 获取或设置需要分页的所有记录的总数。    
    public int RecordCount
    {
        get
        {
            object obj = ViewState["Recordcount"];
            return (obj == null) ? 0 : (int)obj;
        }
        set
        {
            ViewState["Recordcount"] = value;
            SetEnable();
        }
    }
    // 获取当前页之后的页的总数。        
    public int PagesRemain
    {
        get
        {
            return PageCount - CurrentPageIndex;
        }
    }
    // 获取或设置每页显示的项数。            
    public int PageSize
    {
        get
        {
            object obj = ViewState["PageSize"];
            if (obj == null)
            {
                obj = size;
            }
            return (obj == null) ? size : (int)obj;
        }
        set
        {
            int pageSize = value;
            if (Math.Abs(pageSize) == 0)
                pageSize = size;
            ViewState["PageSize"] = pageSize;
        }
    }
    // 获取在当前页之后还未显示的剩余记录的项数。
    public int RecordsRemain
    {
        get
        {
            if (CurrentPageIndex < PageCount)
            {
                return RecordCount - (CurrentPageIndex * PageSize);
            }
            else
            {
                return 0;
            }
        }
    }
    // 获取所有要分页的记录需要的总页数。        
    public int PageCount
    {
        get { return (RecordCount > 0) ? (int)Math.Ceiling((double)RecordCount / (double)PageSize) : 1; }
    }
    public int XRecord
    {
        get
        {
            return int.Parse(System.Configuration.ConfigurationSettings.AppSettings["XRecord"].Trim());
        }
    }
    #endregion Property
}

						