C#简单分页

来源：互联网发布：淘宝动态评分编辑：程序博客网时间：2024/05/14 08:19

using System;
using System.Data;
using System.Configuration;
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;
using System.Text;

/// <summary>
/// SimplePagination 的摘要说明
/// </summary>
public class SimplePagination
{
public SimplePagination ()
{

}

    /// <summary>
    /// 获得总页数
    /// </summary>
    /// <param name="record_count">总记录数</param>
    /// <param name="page_size">每页显示的记录数</param>
    /// <returns>int</returns>
    public static int GetPageCount (int record_count, int page_size)
    {
        if(record_count <= 0 || page_size <= 0)
        {
            return 1;
        }
        return (int)Math.Ceiling((double)record_count / page_size);
    }

    /// <summary>
    /// 获得当前页
    /// </summary>
    /// <param name="current_page">当前页</param>
    /// <param name="record_count">总记录数</param>
    /// <param name="page_size">每页显示的记录数</param>
    /// <returns>int</returns>
    public static int GetCurrentPage (string current_page, int record_count, int page_size)
    {
        int current = 1;
        if(current_page == null || current_page == "")
        {
            return 1;
        }
        try
        {
            current = int.Parse(current_page);
            if(current <= 0)
            {
                return 1;
            }
            int page_count = GetPageCount(record_count, page_size);
            if(current > page_count)
            {
                return page_count;
            }
        }
        catch
        {
            return 1;
        }
        return current;
    }

    /// <summary>
    /// 获得总记录数的编号索引(针对list循环，循环变量的起始值为1，最大值为每页显示的记录数)
    /// </summary>
    /// <param name="page_size">每页显示的记录数</param>
    /// <param name="current_page">当前页</param>
    /// <param name="loop">循环变量</param>
    /// <returns></returns>
    public static int GetIndex (int page_size, int current_page, int loop)
    {
        return (page_size * (current_page - 1) + loop);
    }

    /// <summary>
    /// 分页
    /// </summary>
    /// <param name="current_page">当前页</param>
    /// <param name="record_count">总记录数</param>
    /// <param name="page_size">每页显示的记录数</param>
    /// <param name="url">跳转到指定的页码</param>
    /// <returns>string</returns>
    public static string GetPage (int current_page, int record_count, int page_size, string url)
    {
        StringBuilder sb = new StringBuilder();

        //分页中的控件的id和name
        string text_id = "id_newpage";                  //文本框的id
        string text_name = "newpage";                   //文本框的name
        string button_id = "id_enter";                  //跳转按钮的id
        string button_name = "enter";                   //跳转按钮的name

        //分页中的样式
        string css_div = "";                            //分页外框DIV的样式
        string css_button = "greenbtn";                 //跳转按钮的样式

string strJS = GetJavaScript(text_id, url);
sb.Append(strJS);

//获得总页数
int page_count = GetPageCount(record_count, page_size);

        //(1)总记录数为0或者每页显示的记录数为0
        if(record_count <= 0 || page_size <= 0)
        {
            sb.Append("<div style='float: right'>" + "/n");
            sb.Append("     共<strong>" + record_count + "</strong>条  " + "/n");
            sb.Append("     第<span style='color:Red'>" + current_page + "</span>页/" + "/n");
            sb.Append("     共<strong>" + page_count + "</strong>页  " + "/n");
            sb.Append("     <span>首页</span>  " + "/n");
            sb.Append("     <span>上一页</span>  " + "/n");
            sb.Append("     <span>下一页</span>  " + "/n");
            sb.Append("     <span>尾页</span>  " + "/n");
            //sb.Append("     转到:<input id='" + text_id + "' name='" + text_name + "' type='text' size='2' />" + "/n");
            //sb.Append("     <input id='" + button_id + "' name='" + button_name + "' type='button' value='go' onclick='' />" + "/n");
            sb.Append("</div>" + "/n");

            return sb.ToString();
        }
        //(2)当前页小于等于0
        if(current_page <= 0)
        {
            current_page = 1;
        }
        //(3)总记录数小于等于每页显示的记录数
        if(record_count <= page_size)
        {
            sb.Append("<div style='float: right'>" + "/n");
            sb.Append("     共<strong>" + record_count + "</strong>条  " + "/n");
            sb.Append("     第<span style='color:Red'>1</span>页/" + "/n");
            sb.Append("     共<strong>1</strong>页  " + "/n");
            sb.Append("     <span>首页</span>  " + "/n");
            sb.Append("     <span>上一页</span>  " + "/n");
            sb.Append("     <span>下一页</span>  " + "/n");
            sb.Append("     <span>尾页</span>  " + "/n");
            sb.Append("     转到:<input id='" + text_id + "' name='" + text_name + "' type='text' size='2' />" + "/n");
            sb.Append("     <input class='" + css_button + "' id='" + button_id + "' name='" + button_name + "' type='button' value='go' onclick='pageRedirect()' />" + "/n");
            sb.Append("</div>" + "/n");
        }
        else
        {
            if(current_page == 1)
            {
                sb.Append("<div style='float: right'>" + "/n");
                sb.Append("     共<strong>" + record_count + "</strong>条  " + "/n");
                sb.Append("     第<span style='color:Red'>1</span>页/" + "/n");
                sb.Append("     共<strong>" + page_count + "</strong>页  " + "/n");
                sb.Append("     <span>首页</span>  " + "/n");
                sb.Append("     <span>上一页</span>  " + "/n");
                sb.Append("     <span><a href='" + url + (current_page + 1).ToString() + "'>下一页</a></span>  " + "/n");
                sb.Append("     <span><a href='" + url + page_count + "'>尾页</a></span>  " + "/n");
                sb.Append("     转到:<input id='" + text_id + "' name='" + text_name + "' type='text' size='2' />" + "/n");
                sb.Append("     <input class='" + css_button + "' id='" + button_id + "' name='" + button_name + "' type='button' value='go' onclick='pageRedirect()' />" + "/n");
                sb.Append("</div>" + "/n");
            }
            else if((current_page > 1) && (current_page < page_count))
            {
                sb.Append("<div style='float: right'>" + "/n");
                sb.Append("     共<strong>" + record_count + "</strong>条  " + "/n");
                sb.Append("     第<span style='color:Red'>" + current_page + "</span>页/" + "/n");
                sb.Append("     共<strong>" + page_count + "</strong>页  " + "/n");
                sb.Append("     <span><a href='" + url + 1.ToString() + "'>首页</a></span>  " + "/n");
                sb.Append("     <span><a href='" + url + (current_page - 1).ToString() + "'>上一页</a></span>  " + "/n");
                sb.Append("     <span><a href='" + url + (current_page + 1).ToString() + "'>下一页</a></span>  " + "/n");
                sb.Append("     <span><a href='" + url + page_count + "'>尾页</a></span>  " + "/n");
                sb.Append("     转到:<input id='" + text_id + "' name='" + text_name + "' type='text' size='2' />" + "/n");
                sb.Append("     <input class='" + css_button + "' id='" + button_id + "' name='" + button_name + "' type='button' value='go' onclick='pageRedirect()' />" + "/n");
                sb.Append("</div>" + "/n");
            }
            else if(current_page >= page_count)
            {
                sb.Append("<div style='float: right'>" + "/n");
                sb.Append("     共<strong>" + record_count + "</strong>条  " + "/n");
                sb.Append("     第<span style='color:Red'>" + current_page + "</span>页/" + "/n");
                sb.Append("     共<strong>" + page_count + "</strong>页  " + "/n");
                sb.Append("     <span><a href='" + url + 1.ToString() + "'>首页</a></span>  " + "/n");
                sb.Append("     <span><a href='" + url + (current_page - 1).ToString() + "'>上一页</a></span>  " + "/n");
                sb.Append("     <span>下一页</span>  " + "/n");
                sb.Append("     <span>尾页</span>  " + "/n");
                sb.Append("     转到:<input id='" + text_id + "' name='" + text_name + "' type='text' size='2' />" + "/n");
                sb.Append("     <input class='" + css_button + "' id='" + button_id + "' name='" + button_name + "' type='button' value='go' onclick='pageRedirect()' />" + "/n");
                sb.Append("</div>" + "/n");
            }
        }

        return sb.ToString();
    }

    public static string GetJavaScript(string text_id, string url)
    {
        StringBuilder sb = new StringBuilder();
        sb.Append("/n");
        sb.Append("<script type='text/javascript'>" + "/n");
        sb.Append("     function pageRedirect()" + "/n");
        sb.Append("     {" + "/n");
        sb.Append("         var txt_page = document.getElementById('" + text_id + "').value;" + "/n");
        sb.Append("         if(txt_page == '')" + "/n");
        sb.Append("         {" + "/n");
        sb.Append("             return;" + "/n");
        sb.Append("         }" + "/n");
        sb.Append("         window.location.href='" + url + "' + escape(txt_page);" + "/n");
        sb.Append("     }" + "/n");
        sb.Append("</script>" + "/n");
        sb.Append("/n");

        return sb.ToString();
        /*
        <script type='text/javascript'>
            function pageRedirect()
            {
                var txt_page = document.getElementById('id_newpage').value;
                if(txt_page == '')
                {
                    return;
                }
                window.location.href='OnlineBroker.aspx?page=' + escape(txt_page);
            }
        </script>
        */
    }
}
/*
分页
    <div style='float: right'>
        共<strong>108</strong>条  
        第<span style='color:Red'>2</span>页/
        共<strong>3</strong>页  
        <span><a href='#'>首页</a></span>  
        <span><a href='#'>上一页</a></span>  
        <span><a href='#'>下一页</a></span>  
        <span><a href='#'>尾页</a></span>  
        转到:<input id='id_newpage' name='newpage' type='text' size='2' />
        <input id='id_enter' name='enter' type='button' value='go' onclick='' />
    </div>

     function pageRedirect()
    {
        var txt_page = document.getElementById("id_newpage").value;
        //alert(txt_page);
        window.location.href="OnlineBroker.aspx?page=" + txt_page;
    }

*/