【.NET】字符串处理

类名：DealString

/// 1.截取字符串，最后加3个小数点
/// 2.获得指定Url的参数的string类型值
/// 3.判断数据类型
/// 4.过滤JS标记
/// 5.获取CheckBoxList属性值
/// 6.通过ID绑定CheckBoxList选项
/// 7.CheckBoxList取值
/// 8.设置CheckBoxList属性值
/// 9.通过ID绑定CheckBoxList选项
/// 10.得到按指定CheckBoxList选项字符串
/// 11.生成Execl
/// 12.获得当前绝对路径
/// 13.得到正则编译参数设置
/// 14.清除给定字符串中的回车及换行符
/// 15.分页方法
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.RegularExpressions;

namespace Tools
{
    /// <summary>
    /// DealString 的摘要说明。
    /// </summary>
    public class DealString
    {

        /// <summary>
        /// 截取字符串
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="count"></param>
        /// <returns></returns>
        public static string substring(object obj, int count)
        {
            string str = tostring(obj);
            if (str.Length > count)
            {
                str = obj.ToString().Substring(, count) + "...";
            }
            return str;

        }

        /// <summary>
        /// 获得指定Url参数的string类型值
        /// </summary>
        /// <param name="strName">Url参数</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>Url参数的string类型值</returns>
        public static string GetQueryString(string strName)
        {
            string GetQueryString = (HttpContext.Current.Request.QueryString[strName]);
            return GetQueryString;
        }

        public static string tostring(object obj)
        {
            string result = "";
            if (obj != null)
            {
                result = obj.ToString().Trim();
            }
            return result;
        }

        /// <summary>
        /// 过滤html标签
        /// </summary>
        /// <param name="TempStr"></param>
        /// <returns></returns>
        public static string StripHTML(string TempStr)
        {
            if (TempStr != null)
            {
                if (TempStr.Length > )
                {
                    TempStr = regularExpressionsOfHTML(TempStr);
                    if (TempStr.Length > )
                    {
                        TempStr = TempStr.Substring(, TempStr.Length - );
                    }
                }
                TempStr = TempStr.Replace("&nbsp;", "");
            }
            return TempStr;
        }
        public static string regularExpressionsOfHTML(string TempContent)
        {
            //TempContent = System.Text.RegularExpressions.Regex.Replace(TempContent,"<[^>]+>",""); //任意多个
            TempContent = System.Text.RegularExpressions.Regex.Replace(TempContent, "<[^>]*>", ""); //匹配一个
            return TempContent.Trim();

        }
        /// <summary>
        /// 判断数据类型
        /// </summary>
        /// <param name="strNumber)"></param>
        /// <returns></returns>
        public bool IsNumber(String strNumber)
        {
            Regex objNotNumberPattern = new Regex("[^0-9.-]");
            Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*");
            Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*");
            String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
            String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
            Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");

            return !objNotNumberPattern.IsMatch(strNumber) &&
            !objTwoDotPattern.IsMatch(strNumber) &&
            !objTwoMinusPattern.IsMatch(strNumber) &&
            objNumberPattern.IsMatch(strNumber);
        }

        public static bool IsNumeric(string value)
        {
            return Regex.IsMatch(value, @"^[+-]?\d*[.]?\d*$");
        }
        public static bool IsInt(string value)
        {
            return Regex.IsMatch(value, @"^[+-]?\d*$");
        }
        public static bool IsUnsign(string value)
        {
            return Regex.IsMatch(value, @"^\d*[.]?\d*$");
        }

        /// <summary>
        /// 过滤JS标记
        /// </summary>
        /// <param name="html"></param>
        /// <returns></returns>
        public string wipeScript(string html)
        {
            System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" on[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            html = regex1.Replace(html, ""); //过滤<script></script>标记
            html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性
            html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件
            html = regex4.Replace(html, ""); //过滤iframe
            html = regex5.Replace(html, ""); //过滤frameset
            return html;
        }

        /// <summary>
        /// 获取CheckBoxList属性值
        /// </summary>
        /// <param name="cbProperty">CheckBoxList对象</param>
        /// <returns></returns>
        public static string GetPropertyValue(CheckBoxList cbProperty)
        {
            string str_property = "";
            for (int i = ; i < cbProperty.Items.Count; i++)
            {
                if (i != cbProperty.Items.Count - )
                {
                    if (cbProperty.Items[i].Selected) str_property += "1,";
                    else str_property += "0,";
                }
                else
                {
                    if (cbProperty.Items[i].Selected) str_property += "";
                    else str_property += "";
                }
            }
            return str_property;
        }

        /// <summary>
        /// CheckBoxList取值
        /// </summary>
        /// <param name="Boxlist"></param>
        /// <returns></returns>
        public static string GetCheckBox(CheckBoxList Boxlist)
        {
            string chenkStr = "";
            for (int i = ; i < Boxlist.Items.Count; i++)
            {
                if (Boxlist.Items[i].Selected == true)
                {
                    chenkStr += Boxlist.Items[i].Value + ",";
                }
            }
            return chenkStr;
        }

        /// <summary>
        /// 设置CheckBoxList属性值
        /// </summary>
        /// <param name="cbProperty">CheckBoxList对象</param>
        /// <param name="propertyvalue">属性值</param>
        public static void SetPropertyValue(CheckBoxList cbProperty, string propertyvalue)
        {
            string[] propertyArray = propertyvalue.Split(',');
            for (int i = ; i < propertyArray.Length; i++)
            {
                if (propertyArray[i] == "") cbProperty.Items[i].Selected = true;
            }

        }
        /// <summary>
        /// 通过ID绑定CheckBoxList选项
        /// </summary>
        /// <param name="cbList">CheckBoxList对象</param>
        /// <param name="selectid">批定ID</param>
        public static void SetSelectByID(CheckBoxList cbList, string selectid)
        {
            selectid = "," + selectid + ",";

            for (int i = ; i < cbList.Items.Count; i++)
            {

                if (selectid.IndexOf("," + cbList.Items[i].Value + ",") >= ) cbList.Items[i].Selected = true;

            }
        }
        /// <summary>

        /// 得到按指定CheckBoxList选项字符串
        /// </summary>
        /// <param name="cbList">CheckBoxList对象</param>
        /// <returns></returns>
        public static string GetSelectString(CheckBoxList cbList)
        {
            string result = "";
            foreach (ListItem item in cbList.Items)
            {
                if (item.Selected) result += item.Value + ",";
            }
            return result.TrimEnd(new char[] { ',' });
        }

        /// <summary>
        /// 生成Execl
        /// </summary>
        /// <param name="dataset">要生成的数据</param>
        /// <param name="typeid">1生成Execl、2直接把数据写入XML</param>
        /// <param name="FileName">文件名</param>
        /// <param name="page">当前页面类</param>
        public static void CreateExcel(DataSet dataset, int typeid, string FileName, System.Web.UI.Page page)
        {
            HttpResponse resp;
            resp = page.Response;
            resp.ContentEncoding = System.Text.Encoding.GetEncoding();
            resp.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(FileName));
            string colHeaders = "", ls_item = "";
            int i = ;

            //定义表对象与行对像，同时用DataSet对其值进行初始化
            DataTable datatable = dataset.Tables[];
            DataRow[] myRow = datatable.Select("");
            // typeid=="1"时导出为EXCEL格式文件；typeid=="2"时导出为XML格式文件
            if (typeid == )
            {
                //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符
                for (i = ; i < datatable.Columns.Count - ; i++)
                    colHeaders += datatable.Columns[i].Caption.ToString() + "\t";
                colHeaders += datatable.Columns[i].Caption.ToString() + "\n";
                //向HTTP输出流中写入取得的数据信息
                resp.Write(colHeaders);
                //逐行处理数据
                foreach (DataRow row in myRow)
                {
                    //在当前行中，逐列获得数据，数据之间以\t分割，结束时加回车符\n
                    for (i = ; i < row.ItemArray.Length - ; i++)
                        ls_item += row[i].ToString() + "\t";
                    ls_item += row[i].ToString() + "\n";
                    //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
                    resp.Write(ls_item);
                    ls_item = "";
                }
            }
            else
            {
                if (typeid == )
                {
                    //从DataSet中直接导出XML数据并且写到HTTP输出流中
                    resp.Write(dataset.GetXml());
                }
            }
            //写缓冲区中的数据到HTTP头文件中
            resp.End();
        }

        /// <summary>
        /// 获得当前绝对路径
        /// </summary>
        /// <param name="strPath">指定的路径</param>
        /// <returns>绝对路径</returns>
        public static string GetMapPath(string strPath)
        {
            if (HttpContext.Current != null)
            {
                return HttpContext.Current.Server.MapPath(strPath);
            }
            else //非web程序引用
            {
                strPath = strPath.Replace("/", "\\");
                if (strPath.StartsWith("\\"))
                {
                    strPath = strPath.Substring(strPath.IndexOf('\\', )).TrimStart('\\');
                }
                return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);
            }
        }

        /// <summary>
        /// 得到正则编译参数设置
        /// </summary>
        /// <returns>参数设置</returns>
        public static RegexOptions GetRegexCompiledOptions()
        {
#if NET1
            return RegexOptions.Compiled;
#else
            return RegexOptions.None;
#endif
        }

        /// <summary>
        /// 清除给定字符串中的回车及换行符
        /// </summary>
        /// <param name="str">要清除的字符串</param>
        /// <returns>清除后返回的字符串</returns>

        private static Regex RegexBr = new Regex(@"(\r\n)", RegexOptions.IgnoreCase);
        public static Regex RegexFont = new Regex(@"<font color=" + "\".*?\"" + @">([\s\S]+?)</font>", GetRegexCompiledOptions());
        public static string ClearBR(string str)
        {
            Match m = null;

            for (m = RegexBr.Match(str); m.Success; m = m.NextMatch())
            {
                str = str.Replace(m.Groups[].ToString(), "");
            }

            return str;
        }

    }
}