C#实现判断字符是否为中文
(2012-08-14 14:25:28)protected bool IsChineseLetter(string input,int index)
{
方法二：
public bool IsChina(string CString)
{
方法三：
/// <summary>
/// 判断句子中是否含有中文
/// </summary>
/// <param >字符串</param>
public bool WordsIScn(string words)
{
方法四：
for (int i=0; i<s.length; i++)
{
正解！
u4e00-u9fa5 汉字的范围。
^[u4e00-u9fa5]$ 汉字的范围的正则
方法五：
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：
/// <summary>
/// 给定一个字符串，判断其是否只包含有汉字
/// </summary>
/// <param ></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 ></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 ></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 ></param>
/// <returns></returns>
private bool IsBig5Code(string word)
{
{
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：
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：
/// <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;
方法四：
for (int i=0; i<s.length; i++)
{
Regex rx = new Regex("^[u4e00-u9fa5]$");}
if (rx.IsMatch(s[i]))
// 是
else
// 否
正解！
u4e00-u9fa5 汉字的范围。
^[u4e00-u9fa5]$ 汉字的范围的正则
方法五：
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：
/// <summary>
/// 给定一个字符串，判断其是否只包含有汉字
/// </summary>
/// <param ></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 ></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 ></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 ></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;
}
}