.NET中怎么实现程序分页-木庄网络博客

本文摘自PHP中文网，作者零下一度，侵删。

aspx

<asp:TextBox ID="txtKeywords" runat="server" CssClass="keyword" style="width:731%;margin-left:-20em;" placeholder="输入姓名/手机号/身份证号码进行搜索" />

<asp:LinkButton ID="lbtnSearch" runat="server" CssClass="btn-search" OnClick="lbtnSearch_Click">查询</asp:LinkButton>

<%#rptList.Items.Count == 0 ? "<tr><td align=\"center\" colspan=\"14\">暂无记录</td></tr>" : ""%>

CodeBehind

命名空间

public partial class xxx : Web.UI.ManagePage
{

protected int totalCount;//总记录数
protected int page;//当前页面
protected int pageSize;//每页数据大小
protected string keywords = string.Empty;//查询条件

protected void Page_Load(object sender, EventArgs e)
　　　{

　　　 this.keywords = Utils..GetQueryString("keywords");//获取查询条件
this.pageSize = GetPageSize(10); //设置每页数据大小

if (!Page.IsPostBack)
{

　　　　RptBind("根据keywords整合的查询语句", "排序字段 asc/desc");

　　　 }

private void RptBind(string _strWhere, string _orderby)
{
this.page = Utils.GetQueryInt("page", 1);
txtKeywords.Text = this.keywords;
BLL.Business bll = new BLL.Business();
this.rptList.DataSource = bll.GetList(this.pageSize, this.page, _strWhere, _orderby, out totalCount,out totalIncome);
this.rptList.DataBind();
lblTotalIncome.Text = Math.Round(totalIncome, 3).ToString();
txtPageNum.Text = this.pageSize.ToString();
string pageUrl = Utils.CombUrlTxt("xxx.aspx", "keywords={0}&page={1}", this.keywords, "__id__");
PageContent.InnerHtml = Utils.OutPageList(this.pageSize, this.page, this.totalCount, pageUrl, 8);
}

private int GetPageSize(int _default_size)
{
int _pagesize;
if (int.TryParse(Utils.GetCookie("detail_page_size", "NovelPage"), out _pagesize))
{
if (_pagesize > 0)
{
return _pagesize;
}
}
return _default_size;
}

protected void lbtnSearch_Click(object sender, EventArgs e)
{
Response.Redirect(Utils.CombUrlTxt("xxx.aspx", "keywords={0}", txtKeywords.Text));
}

protected void txtPageNum_TextChanged(object sender, EventArgs e)
{
int _pagesize;
if (int.TryParse(txtPageNum.Text.Trim(), out _pagesize))
{
if (_pagesize > 0)
{
Utils.WriteCookie("detail_page_size", "NovelPage", _pagesize.ToString(), 14400);
}
}
Response.Redirect(Utils.CombUrlTxt("xxx.aspx", "keywords={0}", this.keywords));
}

}

Utils

命名空间

public class Utils
{

public static string GetQueryString(string strName)
{
return GetQueryString(strName, false);
}

public static string GetQueryString(string strName, bool sqlSafeCheck)
{
if (HttpContext.Current.Request.QueryString[strName] == null)
return "";

if (sqlSafeCheck && !IsSafeSqlString(HttpContext.Current.Request.QueryString[strName]))
return "unsafe string";

return HttpContext.Current.Request.QueryString[strName];
}

public static bool IsSafeSqlString(string str)
{
return !Regex.IsMatch(str, @"[-|;|,|\/|$|$|\[|\]|\}|\{|%|@|\*|!|\']");
}

public static int GetQueryInt(string strName, int defValue)
{
return StrToInt(HttpContext.Current.Request.QueryString[strName], defValue);
}

public static int StrToInt(string expression, int defValue)
{
if (string.IsNullOrEmpty(expression) || expression.Trim().Length >= 11 || !Regex.IsMatch(expression.Trim(), @"^([-]|[0-9])[0-9]*(\.\w*)?$"))
return defValue;

int rv;
if (Int32.TryParse(expression, out rv))
return rv;

return Convert.ToInt32(StrToFloat(expression, defValue));
}

public static float StrToFloat(string expression, float defValue)
{
if ((expression == null) || (expression.Length > 10))
return defValue;

float intValue = defValue;
if (expression != null)
{
bool IsFloat = Regex.IsMatch(expression, @"^([-]|[0-9])[0-9]*(\.\w*)?$");
if (IsFloat)
float.TryParse(expression, out intValue);
}
return intValue;
}

public static string CombUrlTxt(string _url, string _keys, params string[] _values)
{
StringBuilder urlParams = new StringBuilder();
try
{
string[] keyArr = _keys.Split(new char[] { '&' });
for (int i = 0; i < keyArr.Length; i++)
{
if (!string.IsNullOrEmpty(_values[i]) && _values[i] != "0")
{
_values[i] = UrlEncode(_values[i]);
urlParams.Append(string.Format(keyArr[i], _values) + "&");
}
}
if (!string.IsNullOrEmpty(urlParams.ToString()) && _url.IndexOf("?") == -1)
urlParams.Insert(0, "?");
}
catch
{
return _url;
}
return _url + DelLastChar(urlParams.ToString(), "&");
}

public static string UrlEncode(string str)
{
if (string.IsNullOrEmpty(str))
{
return "";
}
str = str.Replace("'", "");
return HttpContext.Current.Server.UrlEncode(str);
}

//删除最后结尾的指定字符后的字符

public static string DelLastChar(string str, string strchar)
{
if (string.IsNullOrEmpty(str))
return "";
if (str.LastIndexOf(strchar) >= 0 && str.LastIndexOf(strchar) == str.Length - 1)
{
return str.Substring(0, str.LastIndexOf(strchar));
}
return str;
}

//返回分页页码

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