Interpreting Regular Expressions in C # (3)

Common expressions

To better understand how to use rules in the C # Environment Expression I have written some rule expressions that may be useful to you. These expressions have been used in other environments and hope to help you .?
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Roman numerals

String p1 = "^ m * (D? C {0, 3} | C [DM]) "+" (L? X {0, 3} | x [LC]) (V? I {0, 3} | I [VX]) $ ";
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? String T1 = "VII ";
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? Match M1 = RegEx. Match (T1, P1 );?
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Exchange the first two words

String t2 = "The quick brown fox ";
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? String P2 = @ "(/S + )";
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? RegEx X2 = new RegEx (P2 );
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? String r2 = x2.replace (t2, "$3 $2 $1", 1 );
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Guan jianzi = Value

String T3 = "myval = 3 ";
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? String P3 = @ "(/W +)/S * =/S * (. *)/S * $ ";
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? Match m3 = RegEx. Match (T3, P3 );
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Implement 80 characters per line

String t4 = "********************"
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? + "******************************"
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? + "******************************";
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? String P4 = ". {80 ,}";
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? Match M4 = RegEx. Match (T4, P4 );
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Month/day/year hour: minute: Second Time Format

String T5 = "01/01/01 16:10:01 ";
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? String P5 = @ "(/d +)/(/d +) :(/d + )";
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? Match M5 = RegEx. Match (T5, P5 );
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Change directory (applicable only to Windows)

String T6 = @ "C:/Documents and Settings/user1/desktop /";
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? String R6 = RegEx. Replace ( T6 , @ "// User1 //", @ "// user2 //");
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Extended 16-bit escape characters

String T7 = "% 41"; // capital
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? String P7 = "% ([0-9a-fa-f] [0-9a-fa-f])";
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? String R7 = RegEx. Replace (T7, P7, hexconvert );?
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Delete comments in C Language (to be improved)

String T8 = @"
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? /*
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? * Notes for traditional styles
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? */
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? ";
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? String P8 = @"
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? // * # Match the delimiters starting with the Annotation
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? .*? # Matching comments
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? /*/# Match the end Separator of the comment
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? ";
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? String R8 = RegEx. Replace (T8, p8, "", "XS ");?
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Deletes spaces at the start and end of a string.

String t9a = "leading ";
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? String p9a = @ "^/S + ";
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? String r9a = RegEx. Replace (t9a, p9a ,"");
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? String t9b = "trailing ";
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? String p9b = @ "/S + $ ";
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? String r9b = RegEx. Replace (t9b, p9b ,"");?
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Add character N after character/to make it a real New Line

String t10 = @ "/ntest/N ";
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? String R10 = RegEx. Replace (T10, @ "// n", "/N ");?
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Convert IP addresses

String T11 = "55.54.53.52 ";
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? String P11 = "^" +
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? @ "([01]? /D/d | 2 [0-4]/d | 25 [0-5])/. "+
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? @ "([01]? /D/d | 2 [0-4]/d | 25 [0-5])/. "+
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? @ "([01]? /D/d | 2 [0-4]/d | 25 [0-5])/. "+
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? @ "([01]? /D/d | 2 [0-4]/d | 25 [0-5]) "+
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? "$ ";
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? Match M11 = RegEx. Match (T11, P11 );?
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Delete the path contained in the file name

String T12 = @ "C:/file.txt ";
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? String p12 = @ "^ .*//";
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? String R12 = RegEx. Replace (T12, p12 ,"");?
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Concatenate rows from multiple strings

String t13 = @ "this is
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? A split line ";
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? String P13 = @ "/S */R? /N/S *";
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? String R13 = RegEx. Replace (t13, P13 ,"");
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Extract all numbers in the string

String T14 = @"
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? Test 1
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? Test 1, 2.3
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? Test 47
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? ";
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? String p14 = @ "(/d + /.? /D * |/./d + )";
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? Matchcollection mc14 = RegEx. Matches (T14, p14 );?
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Find all uppercase letters

String T15 = "this is a test of all caps ";
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? String P15 = @ "(/B [^/Wa-z0-9 _] +/B )";
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? Matchcollection mc15 = RegEx. Matches (T15, p15 );?
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Find lowercase words

String T16 = "this is a test of lowercase ";
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? String p16 = @ "(/B [^/WA-Z0-9 _] +/B )";
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? Matchcollection mc16 = RegEx. Matches (T16, p16 );?
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Find the words whose first letter is uppercase.

String t17 = "this is a test of initial caps ";
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? String P17 = @ "(/B [^/Wa-z0-9 _] [^/WA-Z0-9 _] */B )";
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? Matchcollection mc17 = RegEx. Matches (t17, P17 );
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