String manipulation

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace MyStringHelper
{
///

/// String operation class
/// 1, GetStrArray (string str, char speater, bool toLower) converts the string to List according to the separator
/// 2, GetStrArray (string str) converts the string according to, split For data
/// 3. GetArrayStr (List list, string speater) Assemble the List into a string according to the delimiter
/// 4, GetArrayStr (List list) get the array list with comma-separated strings
/// 5, GetArrayValueStr (Dictionary <int, int> list) Get a comma-separated string of arrays
/// 6, DelLastComma (string str) delete the last comma
// // 7, DelLastChar (string str, string strchar) delete the last specified The character after the character
/// 8, ToSBC (string input) full-width function (SBC case)
/// 9, ToDBC (string input) half-width function (SBC case)
/// 10, GetSubStringList (string o_str, char sepeater) put the string into a List according to the specified separator to remove duplicates
// 11, GetCleanStyle (string StrList, string SplitString) converts the string style to a pure string
/// 12, GetNewStyle (string StrList, string NewStyle, string SplitString, out string Error) converts the string to a new style
/// 13, SplitMulti (string str, string splitstr) split the string
/// 14, SqlSafeString ( string String, bool IsDel)
///

public static class StringHelper
{
///

/// Convert the string to List according to the separator
///

/// Source string
/// Delimiter
/// Whether to convert to lowercase
///
public static List GetStrArray(string str, char speater, bool toLower)
{
List list = new List ();
string[] ss = str.Split(speater);
foreach (string s in ss)
{
if (!string.IsNullOrEmpty(s) && s != speater.ToString())
{
string strVal = s;
if (toLower)
{
strVal = s.ToLower();
}
list.Add(strVal);
}
}
return list;
}
///

/// Convert the string according to, split into data
////

///
///
public static string[] GetStrArray(string str)
{
return str.Split(new Char[] { ',' });
}
///

/// Put List Assemble into string according to the separator
///

///
///
///
public static string GetArrayStr(List list, string speater)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < list.Count; i++)
{
if (i == list.Count - 1)
{
sb.Append(list[i]);
}
else
{
sb.Append(list[i]);
sb.Append(speater);
}
}
return sb.ToString();
}
///

/// Get the comma-separated string of the array list
///

///
///
public static string GetArrayStr(List list)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < list.Count; i++)
{
if (i == list.Count - 1)
{
sb.Append(list[i].ToString());
}
else
{
sb.Append(list[i]);
sb.Append(",");
}
}
return sb.ToString();
}
///

/// Get the comma-separated string of the array list
///

///
///
public static string GetArrayValueStr(Dictionary<int, int> list)
{
StringBuilder sb = new StringBuilder();
foreach (KeyValuePair<int, int> kvp in list)
{
sb.Append(kvp.Value + ",");
}
if (list.Count > 0)
{
return DelLastComma(sb.ToString());
}
else
{
return "";
}
}

    #region 删除最后一个字符之后的字符

    /// <summary>
    /// 删除最后结尾的一个逗号
    /// </summary>
    public static string DelLastComma(string str)
    {
        return str.Substring(0, str.LastIndexOf(","));
    }

    /// <summary>
    /// 删除最后结尾的指定字符后的字符
    /// </summary>
    public static string DelLastChar(string str, string strchar)
    {
        return str.Substring(0, str.LastIndexOf(strchar));
    }

    #endregion

    /// <summary>
    /// 转全角的函数(SBC case)
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public static string ToSBC(string input)
    {
        //半角转全角：
        char[] c = input.ToCharArray();
        for (int i = 0; i < c.Length; i++)
        {
            if (c[i] == 32)
            {
                c[i] = (char)12288;
                continue;
            }
            if (c[i] < 127)
                c[i] = (char)(c[i] + 65248);
        }
        return new string(c);
    }

    /// <summary>
    ///  转半角的函数(SBC case)
    /// </summary>
    /// <param name="input">输入</param>
    /// <returns></returns>
    public static string ToDBC(string input)
    {
        char[] c = input.ToCharArray();
        for (int i = 0; i < c.Length; i++)
        {
            if (c[i] == 12288)
            {
                c[i] = (char)32;
                continue;
            }
            if (c[i] > 65280 && c[i] < 65375)
                c[i] = (char)(c[i] - 65248);
        }
        return new string(c);
    }

    /// <summary>
    /// 把字符串按照指定分隔符装成 List 去除重复
    /// </summary>
    /// <param name="o_str"></param>
    /// <param name="sepeater"></param>
    /// <returns></returns>
    public static List<string> GetSubStringList(string o_str, char sepeater)
    {
        List<string> list = new List<string>();
        string[] ss = o_str.Split(sepeater);
        foreach (string s in ss)
        {
            if (!string.IsNullOrEmpty(s) && s != sepeater.ToString())
            {
                list.Add(s);
            }
        }
        return list;
    }


    #region 将字符串样式转换为纯字符串
    /// <summary>
    ///  将字符串样式转换为纯字符串
    /// </summary>
    /// <param name="StrList"></param>
    /// <param name="SplitString"></param>
    /// <returns></returns>
    public static string GetCleanStyle(string StrList, string SplitString)
    {
        string RetrunValue = "";
        //如果为空，返回空值
        if (StrList == null)
        {
            RetrunValue = "";
        }
        else
        {
            //返回去掉分隔符
            string NewString = "";
            NewString = StrList.Replace(SplitString, "");
            RetrunValue = NewString;
        }
        return RetrunValue;
    }
    #endregion

    #region 将字符串转换为新样式
    /// <summary>
    /// 将字符串转换为新样式
    /// </summary>
    /// <param name="StrList"></param>
    /// <param name="NewStyle"></param>
    /// <param name="SplitString"></param>
    /// <param name="Error"></param>
    /// <returns></returns>
    public static string GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)
    {
        string ReturnValue = "";
        //如果输入空值，返回空，并给出错误提示
        if (StrList == null)
        {
            ReturnValue = "";
            Error = "请输入需要划分格式的字符串";
        }
        else
        {
            //检查传入的字符串长度和样式是否匹配,如果不匹配，则说明使用错误。给出错误信息并返回空值
            int strListLength = StrList.Length;
            int NewStyleLength = GetCleanStyle(NewStyle, SplitString).Length;
            if (strListLength != NewStyleLength)
            {
                ReturnValue = "";
                Error = "样式格式的长度与输入的字符长度不符，请重新输入";
            }
            else
            {
                //检查新样式中分隔符的位置
                string Lengstr = "";
                for (int i = 0; i < NewStyle.Length; i++)
                {
                    if (NewStyle.Substring(i, 1) == SplitString)
                    {
                        Lengstr = Lengstr + "," + i;
                    }
                }
                if (Lengstr != "")
                {
                    Lengstr = Lengstr.Substring(1);
                }
                //将分隔符放在新样式中的位置
                string[] str = Lengstr.Split(',');
                foreach (string bb in str)
                {
                    StrList = StrList.Insert(int.Parse(bb), SplitString);
                }
                //给出最后的结果
                ReturnValue = StrList;
                //因为是正常的输出，没有错误
                Error = "";
            }
        }
        return ReturnValue;
    }
    #endregion

    /// <summary>
    /// 分割字符串
    /// </summary>
    /// <param name="str"></param>
    /// <param name="splitstr"></param>
    /// <returns></returns>
    public static string[] SplitMulti(string str, string splitstr)
    {
        string[] strArray = null;
        if ((str != null) && (str != ""))
        {
            strArray = new Regex(splitstr).Split(str);
        }
        return strArray;
    }
    public static string SqlSafeString(string String, bool IsDel)
    {
        if (IsDel)
        {
            String = String.Replace("'", "");
            String = String.Replace("\"", "");
            return String;
        }
        String = String.Replace("'", "&#39;");
        String = String.Replace("\"", "&#34;");
        return String;
    }

    #region 获取正确的Id，如果不是正整数，返回0
    /// <summary>
    /// 获取正确的Id，如果不是正整数，返回0
    /// </summary>
    /// <param name="_value"></param>
    /// <returns>返回正确的整数ID，失败返回0</returns>
    public static int StrToId(string _value)
    {
        if (IsNumberId(_value))
            return int.Parse(_value);
        else
            return 0;
    }
    #endregion
    #region 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。
    /// <summary>
    /// 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。(0除外)
    /// </summary>
    /// <param name="_value">需验证的字符串。。</param>
    /// <returns>是否合法的bool值。</returns>
    public static bool IsNumberId(string _value)
    {
        return QuickValidate("^[1-9]*[0-9]*$", _value);
    }
    #endregion
    #region 快速验证一个字符串是否符合指定的正则表达式。
    /// <summary>
    /// 快速验证一个字符串是否符合指定的正则表达式。
    /// </summary>
    /// <param name="_express">正则表达式的内容。</param>
    /// <param name="_value">需验证的字符串。</param>
    /// <returns>是否合法的bool值。</returns>
    public static bool QuickValidate(string _express, string _value)
    {
        if (_value == null) return false;
        Regex myRegex = new Regex(_express);
        if (_value.Length == 0)
        {
            return false;
        }
        return myRegex.IsMatch(_value);
    }
    #endregion

    #region 得到字符串长度，一个汉字长度为2
    /// <summary>
    /// 得到字符串长度，一个汉字长度为2
    /// </summary>
    /// <param name="inputString">参数字符串</param>
    /// <returns></returns>
    public static int StrLength(string inputString)
    {
        System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
        int tempLen = 0;
        byte[] s = ascii.GetBytes(inputString);
        for (int i = 0; i < s.Length; i++)
        {
            if ((int)s[i] == 63)
                tempLen += 2;
            else
                tempLen += 1;
        }
        return tempLen;
    }
    #endregion

    #region 截取指定长度字符串
    /// <summary>
    /// 截取指定长度字符串
    /// </summary>
    /// <param name="inputString">要处理的字符串</param>
    /// <param name="len">指定长度</param>
    /// <returns>返回处理后的字符串</returns>
    public static string ClipString(string inputString, int len)
    {
        bool isShowFix = false;
        if (len % 2 == 1)
        {
            isShowFix = true;
            len--;
        }
        System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
        int tempLen = 0;
        string tempString = "";
        byte[] s = ascii.GetBytes(inputString);
        for (int i = 0; i < s.Length; i++)
        {
            if ((int)s[i] == 63)
                tempLen += 2;
            else
                tempLen += 1;

            try
            {
                tempString += inputString.Substring(i, 1);
            }
            catch
            {
                break;
            }

            if (tempLen > len)
                break;
        }

        byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
        if (isShowFix && mybyte.Length > len)
            tempString += "…";
        return tempString;
    }
    #endregion
    #region HTML转行成TEXT
    /// <summary>
    /// HTML转行成TEXT
    /// </summary>
    /// <param name="strHtml"></param>
    /// <returns></returns>
    public static string HtmlToTxt(string strHtml)
    {
        string[] aryReg ={
        @"<script[^>]*?>.*?</script>",
        @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
        @"([\r\n])[\s]+",
        @"&(quot|#34);",
        @"&(amp|#38);",
        @"&(lt|#60);",
        @"&(gt|#62);",
        @"&(nbsp|#160);",
        @"&(iexcl|#161);",
        @"&(cent|#162);",
        @"&(pound|#163);",
        @"&(copy|#169);",
        @"&#(\d+);",
        @"-->",
        @"<!--.*\n"
        };

        string newReg = aryReg[0];
        string strOutput = strHtml;
        for (int i = 0; i < aryReg.Length; i++)
        {
            Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);
            strOutput = regex.Replace(strOutput, string.Empty);
        }

        strOutput.Replace("<", "");
        strOutput.Replace(">", "");
        strOutput.Replace("\r\n", "");


        return strOutput;
    }
    #endregion

    #region 判断对象是否为空
    /// <summary>
    /// 判断对象是否为空，为空返回true
    /// </summary>
    /// <typeparam name="T">要验证的对象的类型</typeparam>
    /// <param name="data">要验证的对象</param>        
    public static bool IsNullOrEmpty<T>(T data)
    {
        //如果为null
        if (data == null)
        {
            return true;
        }

        //如果为""
        if (data.GetType() == typeof(String))
        {
            if (string.IsNullOrEmpty(data.ToString().Trim()))
            {
                return true;
            }
        }

        //如果为DBNull
        if (data.GetType() == typeof(DBNull))
        {
            return true;
        }

        //不为空
        return false;
    }

    /// <summary>
    /// 判断对象是否为空，为空返回true
    /// </summary>
    /// <param name="data">要验证的对象</param>
    public static bool IsNullOrEmpty(object data)
    {
        //如果为null
        if (data == null)
        {
            return true;
        }

        //如果为""
        if (data.GetType() == typeof(String))
        {
            if (string.IsNullOrEmpty(data.ToString().Trim()))
            {
                return true;
            }
        }

        //如果为DBNull
        if (data.GetType() == typeof(DBNull))
        {
            return true;
        }

        //不为空
        return false;
    }
    #endregion
}

}