String字符，这是最常见的类型，但是时常又需要对字符进行处理，系统自带的有时并不能满足大伙的需求，以下列举出一些String加强的方法，Function:
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public class StringPlus { //---字符串转化为list public static List<string> GetStrArray(string str, char speater,bool toLower) { List<string> list = new List<string>(); 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; } //---字符串转化为list 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; } //---字符串转化为数组 public static string[] GetStrArray(string str) { return str.Split(new char[',']); } //---list转化为字符串 public static string GetArrayStr(List<string> 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(); } #region 删除最后一个字符之后的字符 //--- 删除最后结尾的一个逗号 public static string DelLastComma(string str) { return str.Substring(0, str.LastIndexOf(",")); } //--- 删除最后结尾的指定字符后的字符 public static string DelLastChar(string str,string strchar) { return str.Substring(0, str.LastIndexOf(strchar)); } #endregion //--- 转全角的函数(SBC case) 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); } //--- 转半角的函数(SBC case) 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); } #region 将字符串样式转换为纯字符串 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 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 /// 截取字符 public static string SubString(string s, int len, string endStr) { if (string.IsNullOrEmpty(s)) { return string.Empty; } string temp = s.Substring(0, (s.Length < len + 1) ? s.Length : len + 1); byte[] encodedBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(temp); string outputStr = ""; int count = 0; for (int i = 0; i < temp.Length; i++) { if ((int)encodedBytes[i] == 63) count += 2; else count += 1; if (count <= len - endStr.Length) outputStr += temp.Substring(i, 1); else if (count > len) break; } if (count <= len) { outputStr = temp; endStr = ""; } outputStr += endStr; return outputStr; } /// <summary> /// 用于删除指定位置的指定字符 /// </summary> /// <param name="_baseString">要处理的原始字符串</param> /// <param name="_removeIndex">要删除的字符开始位置</param> /// <param name="_char">要删除的字符</param> /// <returns>处理后的字符串</returns> public static string RemoveChar(string _baseString, int _removeIndex, char _char) { if (string.IsNullOrEmpty(_baseString)) { return ""; } else { if (_baseString.Contains(_char.ToString()) && _baseString[_removeIndex] == _char) { return _baseString.Substring(_removeIndex, _char.ToString().Length); } else { return _baseString; } } } /// <summary> /// 在字符串参数中检查指定的字符出现的次数 /// </summary> /// <param name="InputStr">待检查的字符串</param> /// <param name="Char">指定的字符</param> /// <returns>返回该字符出现的次数，没找到就返回-1</returns> public static int FindChar(string InputStr, char Char) { if (!string.IsNullOrEmpty(InputStr)) { int idx = 0; char[] CharArr = InputStr.ToCharArray(); foreach (char inputchar in CharArr) { if (Char == inputchar) idx += 1; } if (idx != 0) return idx; } return -1; } /// <summary> /// 返回字符串的Ascii字符数量(中文*2英文*1) /// </summary> /// <param name="strCode">查询字符串</param> /// <returns>Ascii字符数</returns> public static int StrLen(string strCode) { int _strlength = strCode.Length; int tmpNum = 0; byte[] strASCII = ASCIIEncoding.ASCII.GetBytes(strCode); for (int i = 0; i < _strlength; i++) { if ((int)strASCII[i] == 63) { tmpNum += 2; } else { tmpNum += 1; } if (i == _strlength - 1) break; } return tmpNum; } //--- 让标签支持空格、逗号、中文空格、中文逗号 public static string Tag(string str) { str = str.Replace(" ", ","); //英文空格转逗号 str = str.Replace("，", ",");//中文逗号转逗号 str = str.Replace(" ", ",");//中文空格转逗号 return str; } //--- 文本转换成HTML public static string Encode(string str) { str = str.Replace("&", "&"); str = str.Replace("'", "''"); str = str.Replace("\"", """); str = str.Replace(" ", " "); str = str.Replace("<", "<"); str = str.Replace(">", ">"); str = str.Replace("\n", "<br>"); return str; } //--- html转成 普通文本 public static string Decode(string str) { str = str.Replace("<br>", "\n"); str = str.Replace(">", ">"); str = str.Replace("<", "<"); str = str.Replace(" ", " "); str = str.Replace(""", "\""); return str; } //--- 处理SQL注入字符串 public static string CheckSqlStr(string str) { if (str == null || str == "") return ""; str = str.ToLower(); str = str.Replace(",", ""); str = str.Replace("，", ""); str = str.Replace("'", ""); str = str.Replace("‘", ""); str = str.Replace("’", ""); str = str.Replace("@", ""); str = str.Replace("＠", ""); str = str.Replace(".", ""); str = str.Replace("。", ""); str = str.Replace(" ", "");//处理空格 （两个空格就可以了） str = str.Replace("<", "");//处理小于号 str = str.Replace(">", "");//处理大于号 str = str.Replace(";", ""); str = str.Replace("'", ""); str = str.Replace("&", ""); str = str.Replace("%20", ""); str = str.Replace("--", ""); str = str.Replace("==", ""); str = str.Replace("%", ""); str = str.Replace("(", ""); str = str.Replace(")", ""); return str; } } |
