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1¡¢DateTime Êý×ÖÐÍ
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System.DateTime currentTime=new System.DateTime();
1.1 È¡µ±Ç°ÄêÔÂÈÕʱ·ÖÃë currentTime=System.DateTime.Now;
1.2 È¡µ±Ç°Äê int Äê=currentTime.Year;
1.3 È¡µ±Ç°Ô int ÔÂ=currentTime.Month;
1.4 È¡µ±Ç°ÈÕ int ÈÕ=currentTime.Day;
1.5 È¡µ±Ç°Ê± int ʱ=currentTime.Hour;
1.6 È¡µ±Ç°·Ö int ·Ö=currentTime.Minute;
1.7 È¡µ±Ç°Ãë int Ãë=currentTime.Second;
1.8 È¡µ±Ç°ºÁÃë int ºÁÃë=currentTime.Millisecond; \£¨±äÁ¿¿ÉÓÃÖÐÎÄ£©
2¡¢Int32.Parse(±äÁ¿) Int32.Parse("³£Á¿")
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3¡¢ ±äÁ¿.ToString()
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12345.ToString("n"); //Éú³É 12,345.00
12345.ToString("C"); //Éú³É £¤12,345.00
12345.ToString("e"); //Éú³É 1.234500e+004
12345.ToString("f4"); //Éú³É 12345.0000
12345.ToString("x"); //Éú³É 3039 (16½øÖÆ)
12345.ToString("p"); //Éú³É 1,234,500.00%
4¡¢±äÁ¿.Length Êý×ÖÐÍ
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È磺 string str="Öйú"; "
int Len = str.Length ; //LenÊÇ×Ô¶¨Òå±äÁ¿£¬ strÊÇÇó²âµÄ×Ö´®µÄ±äÁ¿Ãû
5¡¢System.Text.Encoding.Default.GetBytes(±äÁ¿)
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È磺byte[] bytStr = System.Text.Encoding.Default.GetBytes(str);
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len = bytStr.Length; http://www.mscto.com
6¡¢System.Text.StringBuilder("")
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È磺System.Text.StringBuilder sb = new System.Text.StringBuilder("");
sb.Append("Öлª");
sb.Append("ÈËÃñ");
sb.Append("¹²ºÍ¹ú");
7¡¢±äÁ¿.Substring(²ÎÊý1,²ÎÊý2);
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È磺string s1 = str.Substring(0,2);
8¡¢String user_IP=Request.ServerVariables["REMOTE_ADDR"].ToString();
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if(Request.ServerVariables["HTTP_VIA"]!=null){
string user_IP=Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}else{
string user_IP=Request.ServerVariables["REMOTE_ADDR"].ToString();
}
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