1\u3001\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u4e32 <\/p>\n
\r\nStringBuilder \u7c7b\u6ca1\u6709\u652f\u6301\u5b50\u4e32\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\u5fc5\u987b\u7528String\u7c7b\u6765\u63d0\u53d6\u3002 \r\nstring mystring="My name is ynn."; \r\n\/\/Displays "name is ynn." \r\nConsole.WriteLine(mystring.Substring( 3 )); \r\n\/\/Displays "ynn" \r\nConsole.WriteLine(mystring.Substring( 11,3 )); \r\n<\/pre>\n2\u3001\u6bd4\u8f83\u5b57\u7b26\u4e32
\nString \u7c7b\u6709\u56db\u79cd\u65b9\u6cd5\uff1aCompare( )\u3001CompareTo( )\u3001CompareOrdinal( )\u3001Equals( )\u3002
\nCompare( )\u65b9\u6cd5\u662fCompareTo( )\u65b9\u6cd5\u7684\u9759\u6001\u7248\u672c\u3002\u53ea\u8981\u4f7f\u7528\u201c\uff1d\u201d\u8fd0\u7b97\u7b26\uff0c\u5c31\u4f1a\u8c03\u7528Equals( )\u65b9\u6cd5\uff0c\u7684\u4ee5Equals( )\u65b9\u6cd5\u4e0e\u201c\uff1d\u201d\u662f\u7b49\u4ef7\u7684\u3002CompareOrdinal( )\u65b9\u6cd5\u5bf9\u4e24\u4e2a\u5b57\u7b26\u4e32<\/p>\n\u6bd4\u8f83\u4e0d\u8003\u672c\u5730\u8bed\u8a00\u4e0e\u6587\u4ef6\u3002
\n\u793a\u4f8b\uff1a <\/p>\n\r\nint result; \r\nbool bresult; \r\ns1="aaaa"; \r\ns2="bbbb"; \r\n\/\/Compare( )method \r\n\/\/result\u503c\u4e3a\u201c0\u201d\u8868\u793a\u7b49\uff0c\u5c0f\u4e8e\u96f6\u8868\u793a s1 < s2\uff0c\u5927\u4e8e\u96f6\u8868\u793a s1 > s2 \r\nresult=String.Compare(s1,s2); \r\nresult=s1.CompareTo( s2 ); \r\nresult=String.CompareOrdinal(s1,s2); \r\nbresult=s1.Equals( s2 ); \r\nbresult=String.Equals( s1,s2 ); \r\n<\/pre>\n\u4e00\u4e2a\u4f8b\u5916\u60c5\u51b5\u662f\uff0c\u4e24\u4e2a\u5b57\u7b26\u4e32\u90fd\u662f\u5185\u7f6e\u7684\uff0c\u5e76\u76f8\u7b49\uff0c\u9759\u6001\u65b9\u6cd5\u8981\u5feb\u5f97\u591a\u3002 <\/p>\n
3\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316 <\/p>\n
3.1 \u683c\u5f0f\u5316\u6570\u5b57
\n\u683c\u5f0f\u5b57\u7b26 \u8bf4\u660e\u548c\u5173\u8054\u5c5e\u6027
\n——————————————————————————–
\nc\u3001C \u8d27\u5e01\u683c\u5f0f\u3002
\nd\u3001D \u5341\u8fdb\u5236\u683c\u5f0f\u3002
\ne\u3001E \u79d1\u5b66\u8ba1\u6570\uff08\u6307\u6570\uff09\u683c\u5f0f\u3002
\nf\u3001F \u56fa\u5b9a\u70b9\u683c\u5f0f\u3002
\ng\u3001G \u5e38\u89c4\u683c\u5f0f\u3002
\nn\u3001N \u6570\u5b57\u683c\u5f0f\u3002
\nr\u3001R \u5f80\u8fd4\u683c\u5f0f\uff0c\u786e\u4fdd\u5c06\u5df2\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\u7684\u6570\u5b57\u8f6c\u6362\u56de\u6570\u5b57\u65f6\u5177\u6709\u4e0e\u539f\u6570\u5b57\u76f8\u540c\u7684\u503c\u3002
\nx\u3001X \u5341\u516d\u8fdb\u5236\u683c\u5f0f\u3002
\n——————————————————————————–<\/p>\n\r\ndouble val=Math.PI; \r\nConsole.WriteLine(val.ToString( )); \/\/displays 3.14159265358979 \r\nConsole.WriteLine(val.ToString("E"));\/\/displays 3.141593E+000 \r\nConsole.WriteLine(val.ToString("F3");\/\/displays 3.142 \r\nint val=65535; \r\nConsole.WriteLine(val.ToString("x")); \/\/displays ffff \r\nConsole.WriteLine(val.ToString("X")); \/\/displays FFFF \r\nSingle val=0.123F; \r\nConsole.WriteLine(val.ToString("p")); \/\/displays 12.30 % \r\nConsole.WriteLine(val.ToString("p1")); \/\/displays 12.3 % \r\n<\/pre>\n\u9ed8\u8ba4\u683c\u5f0f\u5316\u4f1a\u5728\u6570\u5b57\u548c\u767e\u5206\u53f7\u4e4b\u95f4\u653e\u5165\u4e00\u4e2a\u7a7a\u683c\u3002\u5b9a\u5236\u65b9\u6cd5\u5982\u4e0b\uff1a
\n\u5176\u4e2dNumberFormatInfo\u7c7b\u662fSystem.Globalization\u547d\u540d\u7a7a\u95f4\u7684\u4e00\u4e2a\u6210\u5458\uff0c\u56e0\u6b64\u8be5\u547d\u540d\u7a7a\u95f4\u5fc5\u987b\u5bfc\u5165\u5230\u7a0b\u5e8f\u4e2d\u3002 <\/p>\n\r\nSingle val=0.123F; \r\nobject myobj=NumberFormatInfo.CurrentInfo.Clone( ) as NumberFormatInfo; \r\nNumberFormatInfo myformat=myobj as NumberFormatInfo; \r\nmyformat.PercentPositivePattern=1; \r\nConsole.WriteLine(val.ToString("p",myformat)); \/\/displays 12.30%; \r\nConsole.WriteLine(val.ToString("p1",myformat)); \/\/displays 12.3%; \r\n<\/pre>\n\u683c\u5f0f\u5316\u5177\u6709\u5f88\u5927\u7684\u7075\u6d3b\u6027\u3002\u4e0b\u9762\u7684\u4f8b\u5b50\u6f14\u793a\u4e00\u4e2a\u6ca1\u6709\u610f\u4e49\u7684\u8d27\u5e01\u7ed3\u6784\uff1a <\/p>\n
\r\ndouble val=1234567.89; \r\nint [] groupsize={2,1,3}; \r\nobject myobj=NumberFormatInfo.CurrentInfo.Clone( ); \r\nNumberFormatInfo mycurrency=myobj as NumberFormatInfo; \r\nmycurrency.CurrencySymbol="#"; \/\/\u7b26\u53f7 \r\nmycurrency.CurrencyDecimalSeparator=":"; \/\/\u5c0f\u6570\u70b9 \r\nmycurrency.CurrencyGroupSeparator="_"; \/\/\u5206\u9694\u7b26 \r\nmycurrency.CurrencyGroupSizes=groupsize; \r\n\/\/ \u8f93\u51fa\u3000#1_234_5_67:89 \r\nConsole.WriteLine(val.ToString("C",mycurrency)); \r\n\r\nc\u3001C \u8d27\u5e01\u683c\u5f0f\u3002\r\nd\u3001D \u5341\u8fdb\u5236\u683c\u5f0f\u3002 \r\ne\u3001E \u79d1\u5b66\u8ba1\u6570\uff08\u6307\u6570\uff09\u683c\u5f0f\u3002 \r\nf\u3001F \u56fa\u5b9a\u70b9\u683c\u5f0f\u3002 \r\ng\u3001G \u5e38\u89c4\u683c\u5f0f\u3002 \r\nn\u3001N \u6570\u5b57\u683c\u5f0f\u3002\r\nr\u3001R \u5f80\u8fd4\u683c\u5f0f\uff0c\u786e\u4fdd\u5c06\u5df2\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\u7684\u6570\u5b57\u8f6c\u6362\u56de\u6570\u5b57\u65f6\u5177\u6709\u4e0e\u539f\u6570\u5b57\u76f8\u540c\u7684\u503c\u3002 \r\nx\u3001X \u5341\u516d\u8fdb\u5236\u683c\u5f0f\u3002 \r\ndouble val=Math.PI;\r\nConsole.WriteLine(val.ToString( )); \/\/displays 3.14159265358979\r\nConsole.WriteLine(val.ToString("E"));\/\/displays 3.141593E+000\r\nConsole.WriteLine(val.ToString("F3");\/\/displays 3.142int val=65535;\r\nConsole.WriteLine(val.ToString("x")); \/\/displays ffff\r\nConsole.WriteLine(val.ToString("X")); \/\/displays FFFF\r\nSingle val=0.123F;Console.WriteLine(val.ToString("p")); \/\/displays 12.30 %Console.WriteLine(val.ToString("p1")); \/\/displays 12.3 %\r\n<\/pre>\n\u9ed8\u8ba4\u683c\u5f0f\u5316\u4f1a\u5728\u6570\u5b57\u548c\u767e\u5206\u53f7\u4e4b\u95f4\u653e\u5165\u4e00\u4e2a\u7a7a\u683c\u3002\u5b9a\u5236\u65b9\u6cd5\u5982\u4e0b\uff1a \u5176\u4e2dNumberFormatInfo\u7c7b\u662fSystem.Globalization\u547d\u540d\u7a7a\u95f4\u7684\u4e00\u4e2a\u6210\u5458\uff0c\u56e0\u6b64\u8be5\u547d\u540d\u7a7a\u95f4\u5fc5\u987b\u5bfc\u5165\u5230\u7a0b\u5e8f\u4e2d\u3002<\/p>\n
\r\nSingle val=0.123F;\r\nobject myobj=NumberFormatInfo.CurrentInfo.Clone( ) as NumberFormatInfo;\r\nNumberFormatInfo myformat=myobj as NumberFormatInfo;\r\nmyformat.PercentPositivePattern=1;\r\nConsole.WriteLine(val.ToString("p",myformat)); \/\/displays 12.30%;\r\nConsole.WriteLine(val.ToString("p1",myformat)); \/\/displays 12.3%;\r\n<\/pre>\n\u683c\u5f0f\u5316\u5177\u6709\u5f88\u5927\u7684\u7075\u6d3b\u6027\u3002\u4e0b\u9762\u7684\u4f8b\u5b50\u6f14\u793a\u4e00\u4e2a\u6ca1\u6709\u610f\u4e49\u7684\u8d27\u5e01\u7ed3\u6784\uff1a<\/p>\n
\r\ndouble val=1234567.89;\r\nint [] groupsize={2,1,3};\r\nobject myobj=NumberFormatInfo.CurrentInfo.Clone( );\r\nNumberFormatInfo mycurrency=myobj as NumberFormatInfo;\r\nmycurrency.CurrencySymbol="#"; \/\/\u7b26\u53f7\r\nmycurrency.CurrencyDecimalSeparator=":"; \/\/\u5c0f\u6570\u70b9mycurrency.CurrencyGroupSeparator="_"; \/\/\u5206\u9694\u7b26mycurrency.CurrencyGroupSizes=groupsize;\/\/ \u8f93\u51fa\u3000\r\n\r\n#1_234_5_67:89\r\nConsole.WriteLine(val.ToString("C",mycurrency)); \r\n<\/pre>\n3.2 \u683c\u5f0f\u5316\u65e5\u671f
\n\u8f93\u51fa\u5f62\u5f0f\u53d6\u51b3\u4e8e\u7528\u6237\u8ba1\u7b97\u673a\u7684\u6587\u5316\u8bbe\u7f6e\u3002 <\/p>\n\r\nusing System; \r\nusing System.Globalization; \r\npublic class MainClass \r\n{ \r\n\u3000\u3000public static void Main(string[] args) \r\n\u3000\u3000{ \r\n DateTime dt = DateTime.Now; \r\n String[] format = {"d","D","f","F","g","G","m","r","s","t", "T","u", "U","y","dddd, MMMM dd yyyy","ddd, MMM d \\"'\\"yy","dddd, MMMM dd","M\/yy","dd-MM\r\n\r\n-yy",}; \r\n String date; \r\n for (int i = 0; i < format.Length; i++) \r\n { \r\n date = dt.ToString(format[i], DateTimeFormatInfo.InvariantInfo); \r\n Console.WriteLine(String.Concat(format[i], " :" , date)); \r\n } \r\n } \r\n} \r\nd :07\/11\/2004 <=======\u8f93\u51fa \r\nD :Sunday, 11 July 2004 \r\nf :Sunday, 11 July 2004 10:52 \r\nF :Sunday, 11 July 2004 10:52:36 \r\ng :07\/11\/2004 10:52 \r\nG :07\/11\/2004 10:52:36 \r\nm :July 11 \r\nr :Sun, 11 Jul 2004 10:52:36 GMT \r\ns :2004-07-11T10:52:36 \r\nt :10:52 \r\nT :10:52:36 \r\nu :2004-07-11 10:52:36Z \r\nU :Sunday, 11 July 2004 02:52:36 \r\ny :2004 July \r\ndddd, MMMM dd yyyy :Sunday, July 11 2004 \r\nddd, MMM d "'"yy :Sun, Jul 11 '04 \r\ndddd, MMMM dd :Sunday, July 11 \r\nM\/yy :7\/04 \r\ndd-MM-yy :11-07-04 \r\n<\/pre>\n3.3 \u683c\u5f0f\u5316\u679a\u4e3e <\/p>\n
\r\nenum classmen \r\n{ \r\n ynn=1, \r\n yly=2, \r\n css=3, \r\n C++=4 \r\n} \r\n\u83b7\u53d6\u679a\u4e3e\u5b57\u7b26\u4e32\u4fe1\u606f\u5982\u4e0b\uff1a \r\nclassmen myclassmen=classmen.yly; \r\nConsole.WriteLine(myclassmen.ToString( )); \/\/displays yly \r\nConsole.WriteLine(myclassmen.ToString("d")); \/\/displays 2 \r\n<\/pre>\n\u4ece\u7cfb\u7edf\u679a\u4e3e\u4e2d\u83b7\u53d6\u6587\u672c\u4eba\u4fe1\u606f\u5982\u4e0b\uff1a <\/p>\n
\r\nDayOfWeek day=DayOfWeek.Friday; \r\n\/\/displays "Day is Friday" \r\nConsole.WriteLine(String.Format("Day is {0:G}",day)); \r\n<\/pre>\n\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u201c G \u201d\u628a\u679a\u4e3e\u663e\u793a\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u4e32 StringBuilder \u7c7b\u6ca1\u6709\u652f\u6301\u5b50\u4e32\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\u5fc5\u987b\u7528String\u7c7b\u6765\u63d0\u53d6\u3002 s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-692","post","type-post","status-publish","format-standard","hentry","category-code_related"],"_links":{"self":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/comments?post=692"}],"version-history":[{"count":1,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/692\/revisions"}],"predecessor-version":[{"id":4595,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/692\/revisions\/4595"}],"wp:attachment":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/media?parent=692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/categories?post=692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/tags?post=692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}