C#判断中文字符 收藏 方法一: 在unicode 字符串中,中文的范围是在4E00..9FFF:CJK Unified Ideographs。 通过对字符的unicode编码进行判断来确定字符是否为中文。 程序代码
view plaincopy to clipboardprint?<PRE class=csharp name="code">protected bool IsChineseLetter(string input,int index) { int code = 0; int chfrom = Convert.ToInt32("4e00", 16); //范围(0x4e00~0x9fff)转换成int(chfrom~chend) int chend = Convert.ToInt32("9fff", 16); if (input != "") { code = Char.ConvertToUtf32(input, index); //获得字符串input中指定索引index处字符unicode编码 if (code >= chfrom && code <= chend) { return true; //当code在中文范围内返回true } else { return false ; //当code不在中文范围内返回false } } return false; }</PRE>
view plaincopy to clipboardprint?protected bool IsChineseLetter(string input,int index) { int code = 0; int chfrom = Convert.ToInt32("4e00", 16); //范围(0x4e00~0x9fff)转换成int(chfrom~chend) int chend = Convert.ToInt32("9fff", 16); if (input != "") { code = Char.ConvertToUtf32(input, index); //获得字符串input中指定索引index处字符unicode编码 if (code >= chfrom && code <= chend) { return true; //当code在中文范围内返回true } else { return false ; //当code不在中文范围内返回false } } return false; } protected bool IsChineseLetter(string input,int index)
{
int code = 0;
int chfrom = Convert.ToInt32("4e00", 16); //范围(0x4e00~0x9fff)转换成int(chfrom~chend)
int chend = Convert.ToInt32("9fff", 16);
if (input != "")
{
code = Char.ConvertToUtf32(input, index); //获得字符串input中指定索引index处字符unicode编码
if (code >= chfrom && code <= chend)
{
return true; //当code在中文范围内返回true
}
else
{
return false ; //当code不在中文范围内返回false
}
}
return false;
}方法二: 程序代码
view plaincopy to clipboardprint?public bool IsChina(string CString) { bool BoolValue = false; for (int i = 0; i < CString.Length; i++) { if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1))) < Convert.ToInt32(Convert.ToChar(128))) { BoolValue = false; } else { return BoolValue = true; } } return BoolValue; }
public bool IsChina(string CString)
{
bool BoolValue = false;
for (int i = 0; i < CString.Length; i++)
{
if (Convert.ToInt32(Convert.ToChar(CString.Substring(i, 1))) < Convert.ToInt32(Convert.ToChar(128)))
{
BoolValue = false;
}
else
{
return BoolValue = true;
}
}
return BoolValue;
} 方法三: 程序代码 view plaincopy to clipboardprint? /// <summary> /// 判断句子中是否含有中文 /// </summary> /// <param >字符串</param> public bool WordsIScn(string words) { string TmmP; for (int i = 0; i < words.Length; i++) { TmmP = words.Substring(i, 1); byte[] sarr = System.Text.Encoding.GetEncoding("gb2312").GetBytes(TmmP); if (sarr.Length == 2) { return true; } } return false; }
/// <summary> /// 判断句子中是否含有中文 /// </summary> /// <param >字符串</param> public bool WordsIScn(string words) { string TmmP;
for (int i = 0; i < words.Length; i++) { TmmP = words.Substring(i, 1);
byte[] sarr = System.Text.Encoding.GetEncoding("gb2312").GetBytes(TmmP);
if (sarr.Length == 2) { return true; } } return false; }view plaincopy to clipboardprint?<STRONG>方法四:</STRONG> 程序代码
方法四: 程序代码view plaincopy to clipboardprint?<PRE class=csharp name="code">for (int i=0; i<s.length; i++) { Regex rx = new Regex("^[\u4e00-\u9fa5]___FCKpd___4quot;); if (rx.IsMatch(s[i])) // 是 else // 否 }</PRE>
view plaincopy to clipboardprint?for (int i=0; i<s.length; i++) { Regex rx = new Regex("^[\u4e00-\u9fa5]___FCKpd___4quot;); if (rx.IsMatch(s[i])) // 是 else // 否 } for (int i=0; i<s.length; i++)
{
Regex rx = new Regex("^[\u4e00-\u9fa5]___FCKpd___4quot;);
if (rx.IsMatch(s[i]))
// 是
else
// 否
} \u4e00-\u9fa5 汉字的范围。 ^[\u4e00-\u9fa5]$ 汉字的范围的正则同理可以判断日文: \u0x3040-\u0x309F 是平假名, \u0x30A0-\u0x30FF 是片假名方法五: 程序代码
view plaincopy to clipboardprint?unicodeencoding unicodeencoding = new unicodeencoding(); byte [] unicodebytearray = unicodeencoding.getbytes( inputstring ); for( int i = 0; i < unicodebytearray.length; i++ ) { i++; //如果是中文字符那么高位不为0 if ( unicodebytearray[i] != 0 ) { } ……
unicodeencoding unicodeencoding = new unicodeencoding();
byte [] unicodebytearray = unicodeencoding.getbytes( inputstring );
for( int i = 0; i < unicodebytearray.length; i++ )
{
i++;
//如果是中文字符那么高位不为0
if ( unicodebytearray[i] != 0 )
{
}
…… 方法六: 程序代码
view plaincopy to clipboardprint?/// <summary> /// 给定一个字符串,判断其是否只包含有汉字 /// </summary> /// <param name="testStr"></param> /// <returns></returns> public bool IsOnlyContainsChinese(string testStr) { char[] words = testStr.ToCharArray(); foreach (char word in words) { if ( IsGBCode(word.ToString()) || IsGBKCode(word.ToString()) ) // it is a GB2312 or GBK chinese word { continue; } else { return false; } } return true; } /// <summary> /// 判断一个word是否为GB2312编码的汉字 /// </summary> /// <param name="word"></param> /// <returns></returns> private bool IsGBCode(string word) { byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(word); if (bytes.Length <= 1) // if there is only one byte, it is ASCII code or other code { return false; } else { byte byte1 = bytes[0]; byte byte2 = bytes[1]; if (byte1 >= 176 && byte1 <= 247 && byte2 >= 160 && byte2 <= 254) //判断是否是GB2312 { return true; } else { return false; } } } /// <summary> /// 判断一个word是否为GBK编码的汉字 /// </summary> /// <param name="word"></param> /// <returns></returns> private bool IsGBKCode(string word) { byte[] bytes = Encoding.GetEncoding("GBK").GetBytes(word.ToString()); if (bytes.Length <= 1) // if there is only one byte, it is ASCII code { return false; } else { byte byte1 = bytes[0]; byte byte2 = bytes[1]; if ( byte1 >= 129 && byte1 <= 254 && byte2 >= 64 && byte2 <= 254) //判断是否是GBK编码 { return true; } else { return false; } } } /// <summary> /// 判断一个word是否为Big5编码的汉字 /// </summary> /// <param name="word"></param> /// <returns></returns> private bool IsBig5Code(string word) { byte[] bytes = Encoding.GetEncoding("Big5").GetBytes(word.ToString()); if (bytes.Length <= 1) // if there is only one byte, it is ASCII code { return false; } else { byte byte1 = bytes[0]; byte byte2 = bytes[1]; if ( (byte1 >= 129 && byte1 <= 254) && ((byte2 >= 64 && byte2 <= 126) || (byte2 >= 161 && byte2 <= 254)) ) //判断是否是Big5编码 { return true; } else { return false; } } }
本文来自博客,转载请标明出处:http://blog.csdn.net/yur505/archive/2008/06/17/2557211.aspx
转载于:https://www.cnblogs.com/wuhenke/archive/2010/01/25/1655608.html