1.\u5b57\u7b26\u4e32\u62fc\u63a5\uff1a<\/p>\n
string msg = ” Hello, ” + thisUser.Name + “.Today is ” + DateTime.Now.ToString( ));<\/p>\n
\u66f4\u6709\u6548\u7387\u7684\u5199\u6cd5\uff1a<\/p>\n
string msg = string .Format ( ” Hello, {0}. Today is {1}” , thisUser.Name, DateTime.Now.ToString( ));<\/p>\n
2.\u5927\u91cf\u6570\u636e\u62fc\u63a5\u5219\u4f7f\u7528StringBuilder\u3002<\/p>\n
3.\u5b57\u7b26\u4e32\u7684\u6bd4\u8f83\uff1a<\/p>\n
\uff081\uff09\u5224\u65ad\u662f\u5426\u662f\u7a7a\u4e32<\/p>\n
if ( str != ” ” )\u4e0eif ( str == ” ” )<\/p>\n
\u66f4\u6709\u6548\u7387\u7684\u5199\u6cd5\uff1a<\/p>\n
if ( str.Length != 0 )\u4e0eif ( str.Length ==0 )<\/p>\n
\u6709\u6548\u7387\u4e14\u53ef\u8bfb\u6027\u66f4\u597d\u7684\u5199\u6cd5\uff1a<\/p>\n
if ( str != string .Empty )\u4e0eif( str .Equals( string .Empty)<\/p>\n
\u6bd4\u8f83\u662f\u5426\u662fNULL\u6216\u7a7a\u5b57\u4e32\u7528\uff1astring.IsNullOrEmpty<\/p>\n
\uff082\uff09 \u5b57\u7b26\u4e32\u4e4b\u95f4\u7684\u6bd4\u8f83<\/p>\n
?if (string.Compare(s,b,true) ==0)?? s<b \u5c0f\u4e8e0\uff0cs==b ,0 s>b \u5927\u4e8e0 \u8fd9\u79cd\u6bd4\u8f83\u7528true\u6307\u5b9a\u5ffd\u7565\u5927\u5c0f\u5199\uff0c\u4e0d\u7528\u518dtoUpper()\u4e4b\u7c7b<\/p>\n
4,\u622a\u53d6\u6700\u540e\u4e00\u4f4d\u4e4b\u524d\u7684\u6570\u636eTrimEnd
\nstring s = “1,2,3,4,5,”;
\nConsole.Write(s.ToString().TrimStart(‘,’));
\nConsole.Read();<\/p>\n
5,\u5206\u5272\u5b57\u7b26\u4e32:
\n1\uff09\u5355\u4e2a\u5b57\u7b26\uff1astring[] args = str.split(‘,’);
\n2)\u5b57\u7b26\u4e32\u5207\u5206\uff1astring[] arrays = Regex.Splits,”##”,RegexOptions.IgnoreCase); \/\/System.Text.RegularExpressions;<\/p>\n
6,\u8f6c\u6362\uff1a<\/p>\n
int.Parse:\u7528\u6cd5\uff0c\u5c06\u629b\u51fa\u5f02\u5e38<\/p>\n
Convert.ToInt32(s): \u5f53s\u4e3a\u7a7a\u65f6\u4e0d\u629b\u51fa\u5f02\u5e38\uff0c\u5f53\u4e3astring.Empty\u6216\u5b57\u7b26\u4e32\u65f6”sdfsd”\u5219\u629b\u51fa\u5f02\u5e38<\/p>\n
int.TryParse(s,out i) \u4e0d\u629b\u51fa\u5f02\u5e38\uff0c\u82e5\u6709\u5f02\u5e38\uff0c\u8fd4\u56defalse,<\/p>\n
\/\/\u6027\u80fd\uff1aint.TryParse > int.Parse > Convert.ToInt32<\/p>\n
7\uff0c\u6c42\u4e24\u4e2a\u6574\u6570\u7684\u5546\u53ca\u4f59\u6570<\/p>\n
int yes; double s = Math.DivRem(5,0,out yes);<\/p>\n
8, \u8fd4\u56de>=\u6307\u5b9a\u6570\u5b57\u7684\u6700\u5c0f\u6574\u6570 Math.Ceiling(0.5)<\/p>\n","protected":false},"excerpt":{"rendered":"
1.\u5b57\u7b26\u4e32\u62fc\u63a5\uff1a string msg = ” Hello, ” + thisUser […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-225","post","type-post","status-publish","format-standard","hentry","category-csharp"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=225"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/225\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}