c# 得到汉字首字母/转换字符

private void getFirstCode()

{

Num = 0;

conn = "Provider=SQLNCLI;Data Source=192.168.0.111,1433;Database=MIS;UID=sa;PWD=;";

string WordBegin = "";

string TermName = "";

sql = "select Term_Name from terms where word_begin is null";

OleDbDataReader odr = db.GetList(conn, sql);

while (odr.Read())

{

Num++;

txt_num.Text = Num.ToString();

TermName = odr.GetValue(0).ToString();

WordBegin = GetChineseSpell(TermName).Substring(0, 1);

sql = "update terms set Word_Begin='" + modsql(WordBegin) + "' where Term_Name='" + modsql(TermName) + "'";

db.ExeSql(conn, sql);

}

MessageBox.Show("获取完成！");

}

static public string GetChineseSpell(string strText)

{

int len = strText.Length;

string myStr = "";

for(int i=0;i<len;i++)

{

myStr += getSpell(strText.Substring(i,1));

}

return myStr;

}

static public string getSpell(string cnChar)

{

byte[] arrCN = Encoding.Default.GetBytes(cnChar);

if(arrCN.Length > 1)

{

int area = (short)arrCN[0];

int pos = (short)arrCN[1];

int code = (area<<8) + pos;

int[] areacode = {45217,45253,45761,46318,46826,47010,47297,47614,48119,48119,49062,49324,49896,50371,50614,50622,50906,51387,51446,52218,52698,52698,52698,52980,53689,54481};

for(int i=0;i<26;i++)

{

int max = 55290;

if(i != 25) max = areacode[i+1];

if(areacode[i]<=code && code<max)

{

return Encoding.Default.GetString(new byte[]{(byte)(65+i)});

}

}

return "*";

}

else return cnChar;

}

//转换字符

private string UnicodeToGB(string content)

{

Regex objRegex = new Regex("&#(?<UnicodeCode>[\\d]{5});", RegexOptions.IgnoreCase);

Match objMatch = objRegex.Match(content);

StringBuilder sb = new StringBuilder(content);

while (objMatch.Success)

{

string code = Convert.ToString(Convert.ToInt32(objMatch.Result("${UnicodeCode}")), 16);

byte[] array = new byte[2];

array[0] = (byte)Convert.ToInt32(code.Substring(2), 16);

array[1] = (byte)Convert.ToInt32(code.Substring(0, 2), 16);

sb.Replace(objMatch.Value, Encoding.Unicode.GetString(array));

objMatch = objMatch.NextMatch();

}

return sb.ToString();

}

private void button2_Click(object sender, EventArgs e)

{

MessageBox.Show(UnicodeToGB("\u8bf7\u6c42\u6709\u6b63\u4e49\u611f\u7684\u597d\u5fc3\u4eba\u5e2e\u5e2e\u6211."));

}

//此方法转换Unicode到汉字

private string UnicodeToCN(string content)

{

string str = content.Replace(@"\u","");

string temp = string.Empty;

for (int i = 0; i < str.Length / 4; i++)

{

temp += (char)Convert.ToInt32(str.Substring(i * 4, 4), 16);

}

return temp;

}

//另种方法转换

1using System.Text.RegularExpressions;

2

3private string Unicode2Character(string str)

9{

10 string text = str;

11 string strPattern = "(?<code>\\\\u[A-F0-9]{4})";

12 do

13 {

14 Match m = Regex.Match(text, strPattern, RegexOptions.IgnoreCase);

15 if (m.Success)

16 {

17 string strValue = m.Groups["code"].Value;

18 int i = System.Int32.Parse(strValue.Substring(2, 4), System.Globalization.NumberStyles.HexNumber);

19 char ch = Convert.ToChar(i);

20 text = text.Replace(strValue, ch.ToString());

21 }

22 else

23 {

24 break;

25 }

26 }

27 while(true);

28

29 return text;

30}