C # special character processing

http://shashoutian2005.blog.163.com/blog/static/168541520093211750982/

http://apps.hi.baidu.com/share/detail/7168280

This is very practical: <script language= "JavaScript" > var reg= New RegExp ("End Ancient", "G"); Create a regular RegExp object var stringobj= "End ancient People's Republic, end ancient people"; var newstr=stringobj.replace (Reg, "China"); alert (NEWSTR); </script>

private static Regex regnumber = new Regex ("^[0-9]+$");
  private static Regex regnumbersign = new Regex ("^[+-]?[ 0-9]+$ ");
  private static Regex regdecimal = new Regex ("^[0-9]+[.")? [0-9]+$ ");
  private static Regex regdecimalsign = new Regex ("^[+-]?[ 0-9]+[.]? [0-9]+$ "); Equivalent to ^[+-]?/d+[.]? /d+$
  private static regex regemail = new Regex ("^[//w-]+@[//w-]+//." Com|net|org|edu|mil|tv|biz|info) $ ");//w a string of English letters or numbers, as in [a-za-z0-9] syntax
  private static Regex REGCHZN = New Regex ("[/u4e00-/u9fa5]");

The

   #region// encodes and converts incoming characters. or with Server.HTMLEncode (ENSTR)
  public static string Encodestr (String str)
  {
   str=str. Replace ("'", "" ");
   str=str. Replace ("/", "&quot;");
   str=str. Replace ("<", "&lt;");
   str=str. Replace (">", "&gt;");
   str=str. Replace ("n", "<br>");
   return str;
  }
        #endregion

#region//The conversion of the library characters into the display. or with Server.htmldecode (str)
public static string Decodestr (String str)
{
Str=str. Replace ("'", "" ");
Str=str. Replace ("&quot;", "/");
Str=str. Replace ("&lt;", "<");
Str=str. Replace ("&gt;", ">");
Str=str. Replace ("<br>", "/n");
return str;
}
#endregion

Numeric string Check
<summary>
Whether a numeric string
</summary>
<param name= "Inputdata" > Input string </param>
<returns></returns>
public static bool Isnumber (string inputdata)
{
Match m = Regnumber.match (Inputdata);
return m.success;
}
<summary>
Whether a numeric string can be signed or unsigned
</summary>
<param name= "Inputdata" > Input string </param>
<returns></returns>
public static bool Isnumbersign (string inputdata)
{
Match m = Regnumbersign.match (Inputdata);
return m.success;
}
<summary>
Whether it is a floating-point number
</summary>
<param name= "Inputdata" > Input string </param>
<returns></returns>
public static bool Isdecimal (string inputdata)
{
Match m = Regdecimal.match (Inputdata);
return m.success;
}
<summary>
is a floating-point number that can be signed or unsigned
</summary>
<param name= "Inputdata" > Input string </param>
<returns></returns>
public static bool Isdecimalsign (string inputdata)
{
Match m = Regdecimalsign.match (Inputdata);
return m.success;
}

<summary>
///Illegal character conversions
</summary>
<param name= "str" ></param>
<returns></returns>
public static string Replacestr (String str)
{
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 ("#", "");
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 ("'", "");
Str=str. Replace ("$", "");

return str;
}

//Check URL
public static bool Checkurl (String str)
{
Regex r=new Regex ("^http://" ([//w-]+//.) +[//w-]+ (/[//w-./?%&=]*)? $ ");

Match m = r.match (str);
if (m.success)
{
return true;
}
Else
{
return false;
}

}

//Date
public static bool Checkdate (String str)
{

Regex r = new Regex ("^ (//d{4})//-(//d{2})//-(//d{2}) $");
Match m =r.match (str);

if (m.success)
{
return true;
}
Else
{
return false;

}

}

public static bool Checkindate (String str)
{
Regex r = new Regex ("^ (//d{4})//-(//d{2})//-(//d{2}) $");
Match m =r.match (str);
if (m.success)//format is correct
{
String m=m.tostring ();
char [] da = new Char[10];//char. Parse (M.tostring ());

M.copyto (0,da,0,10);

BOOL Bl=false;
String Yy= "";
String Mm= "";
String Dd= "";

#region Remove YYYY, MM, DD, respectively
for (int i=0;i<4;i++)
{
YY +=da[i]. ToString ();
}

for (int i=0;i<2;i++)
{
Mm+=da[5+i]. ToString ();
}

for (int i=0;i<2;i++)
{
Dd+=da[8+i]. ToString ();
}
#endregion

int Yearlow=int. Parse (configurationsettings.appsettings["Yearlow"]);
int Yearhigh=int. Parse (configurationsettings.appsettings["Yearhigh"]);
if (int. Parse (yy) <yearhigh && Int. Parse (yy) >yearlow)//
{
Whether the #region is a valid date value
BOOL B=true;
if (b)
{
BOOL B=false;
Switch (mm)
{
Case "a": b=true;
Break
Case "": b=true;
Break
Case "": b=true;
Break
Case "a": b=true;
Break
Case "a": b=true;
Break
Case "a": b=true;
Break
Case "Modified": b=true;
Break
Case "": b=true;
Break
Case "a": b=true;
Break
Case "ten": b=true;
Break
Case "one": b=true;
Break
Case "a": b=true;
Break
}
if (B)
{
Switch (DD)
{
Case "a": bl=true;
Break
Case "": bl=true;
Break
Case "": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "Modified": bl=true;
Break
Case "": bl=true;
Break
Case "a": bl=true;
Break
Case "ten": bl=true;
Break
Case "one": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "": bl=true;
Break
Case "": bl=true;
Break
Case "": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "": bl=true;
Break
Case "": bl=true;
Break
Case "": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "num": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "a": bl=true;
Break
Case "to": bl=true;
Break
}
}
}
#endregion
}
Else
{
Bl=false;
}

if (BL)
{
return true;
}
Else
{
return false;
}
}
Else
{
return false;
}

}