{"id":1211,"date":"2025-01-25T23:01:36","date_gmt":"2025-01-25T15:01:36","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1211"},"modified":"2025-01-25T23:05:30","modified_gmt":"2025-01-25T15:05:30","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-c-%e4%b8%ad%e5%b0%86%e6%95%b4%e6%95%b0%e8%bd%ac%e6%8d%a2%e4%b8%ba%e8%a1%a5%e9%9b%b6%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%9a5-%e7%a7%8d%e6%9c%89%e6%95%88%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/25\/%e5%a6%82%e4%bd%95%e5%9c%a8-c-%e4%b8%ad%e5%b0%86%e6%95%b4%e6%95%b0%e8%bd%ac%e6%8d%a2%e4%b8%ba%e8%a1%a5%e9%9b%b6%e5%ad%97%e7%ac%a6%e4%b8%b2%ef%bc%9a5-%e7%a7%8d%e6%9c%89%e6%95%88%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u5982\u4f55\u5728 C# \u4e2d\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u8865\u96f6\u5b57\u7b26\u4e32\uff1a5 \u79cd\u6709\u6548\u65b9\u6cd5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 C# \u4e2d\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u8865\u96f6\u5b57\u7b26\u4e32\u662f\u5e38\u89c1\u7684\u683c\u5f0f\u5316\u9700\u6c42\u3002\u672c\u6587\u4ecb\u7ecd\u4e86 5 \u79cd\u6709\u6548\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528\u00a0<code>ToString(\"D5\")<\/code>\u3001<code>PadLeft<\/code>\u3001<code>String.Format<\/code>\u00a0\u7b49\u65b9\u5f0f\u6765\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u5e76\u8865\u5145\u524d\u5bfc\u96f6\u3002\u8fd9\u4e9b\u6280\u5de7\u5e2e\u52a9\u4f60\u7075\u6d3b\u5904\u7406\u6574\u6570\u683c\u5f0f\u5316\uff0c\u6ee1\u8db3\u4e0d\u540c\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\uff0c\u63d0\u5347\u4ee3\u7801\u53ef\u8bfb\u6027\u4e0e\u6548\u7387\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u4f7f\u7528 <code>ToString<\/code> \u65b9\u6cd5\u4e0e\u683c\u5f0f\u5b57\u7b26\u4e32<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C# \u63d0\u4f9b\u4e86 <code>ToString<\/code> \u65b9\u6cd5\uff0c\u5141\u8bb8\u901a\u8fc7\u683c\u5f0f\u5b57\u7b26\u4e32\u6765\u6307\u5b9a\u6574\u6570\u7684\u663e\u793a\u683c\u5f0f\u3002\u901a\u8fc7 <code>\"D\"<\/code>\uff08\u6570\u5b57\u683c\u5f0f\uff09\u548c\u6307\u5b9a\u6570\u5b57\u957f\u5ea6\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u5e76\u5728\u524d\u9762\u8865\u5145\u96f6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\n\nclass Program\n{\n    static void Main()\n    {\n        int number = 42;\n        string result = number.ToString(\"D5\");  \/\/ \u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u81f3\u5c115\u4f4d\uff0c\u524d\u9762\u8865\u96f6\n        Console.WriteLine(result);  \/\/ \u8f93\u51fa 00042\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u91ca\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\"D5\"<\/code> \u8868\u793a\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u81f3\u5c11 5 \u4f4d\u6570\u5b57\uff0c\u5982\u679c\u4f4d\u6570\u4e0d\u591f\u5219\u5728\u524d\u9762\u8865\u5145\u96f6\u3002<\/li>\n\n\n\n<li>\u8fd9\u79cd\u65b9\u5f0f\u975e\u5e38\u76f4\u89c2\u4e14\u6613\u4e8e\u7406\u89e3\uff0c\u9002\u7528\u4e8e\u56fa\u5b9a\u957f\u5ea6\u7684\u683c\u5f0f\u9700\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u4f7f\u7528 <code>String.PadLeft<\/code> \u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>PadLeft<\/code> \u65b9\u6cd5\u5141\u8bb8\u4f60\u6307\u5b9a\u603b\u5b57\u7b26\u6570\uff0c\u5e76\u901a\u8fc7\u586b\u5145\u6307\u5b9a\u5b57\u7b26\uff08\u9ed8\u8ba4\u4e3a\u7a7a\u683c\uff09\u6765\u8c03\u6574\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002\u5c06\u5176\u4e0e\u6574\u6570\u7684 <code>ToString<\/code> \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8865\u96f6\u6548\u679c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\n\nclass Program\n{\n    static void Main()\n    {\n        int number = 42;\n        string result = number.ToString().PadLeft(5, '0');  \/\/ \u4f7f\u7528 PadLeft \u586b\u5145\u96f6\n        Console.WriteLine(result);  \/\/ \u8f93\u51fa 00042\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u91ca\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>PadLeft(5, '0')<\/code> \u5c06\u5b57\u7b26\u4e32\u8865\u5145\u5230 5 \u4e2a\u5b57\u7b26\uff0c\u4e14\u524d\u9762\u7528\u96f6\u586b\u5145\u3002<\/li>\n\n\n\n<li><code>PadLeft<\/code> \u53ef\u4ee5\u5904\u7406\u5b57\u7b26\u4e32\uff0c\u9002\u5408\u9700\u8981\u6839\u636e\u5f53\u524d\u6570\u5b57\u52a8\u6001\u51b3\u5b9a\u8865\u96f6\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4f7f\u7528 <code>String.Format<\/code> \u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>String.Format<\/code> \u4e5f\u53ef\u4ee5\u7528\u6765\u683c\u5f0f\u5316\u6574\u6570\uff0c\u5e76\u5728\u9700\u8981\u65f6\u8865\u5145\u96f6\u3002\u5b83\u4f7f\u7528\u7c7b\u4f3c <code>ToString<\/code> \u7684\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff0c\u4f46\u66f4\u52a0\u7075\u6d3b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\n\nclass Program\n{\n    static void Main()\n    {\n        int number = 42;\n        string result = string.Format(\"{0:D5}\", number);  \/\/ \u4f7f\u7528 String.Format\n        Console.WriteLine(result);  \/\/ \u8f93\u51fa 00042\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u91ca\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>{0:D5}<\/code> \u6307\u5b9a\u4e86\u4e00\u4e2a\u6570\u5b57\u683c\u5f0f\uff0c\u8868\u793a\u81f3\u5c11 5 \u4f4d\uff0c\u5982\u679c\u4f4d\u6570\u4e0d\u8db3\u5219\u7528\u96f6\u586b\u5145\u3002<\/li>\n\n\n\n<li>\u8fd9\u79cd\u65b9\u5f0f\u7c7b\u4f3c\u4e8e <code>ToString(\"D5\")<\/code>\uff0c\u4f46\u662f\u5b83\u5141\u8bb8\u66f4\u591a\u7684\u683c\u5f0f\u5316\u9009\u9879\uff0c\u9002\u5408\u591a\u79cd\u683c\u5f0f\u5316\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u4f7f\u7528\u63d2\u503c\u5b57\u7b26\u4e32 (C# 6.0 \u53ca\u4ee5\u4e0a)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C# 6.0 \u5f15\u5165\u4e86\u63d2\u503c\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u66f4\u52a0\u7b80\u6d01\u5730\u8fdb\u884c\u683c\u5f0f\u5316\u3002\u901a\u8fc7\u63d2\u503c\u5b57\u7b26\u4e32\uff0c\u76f4\u63a5\u5c06\u8868\u8fbe\u5f0f\u5d4c\u5165\u5b57\u7b26\u4e32\u4e2d\u5e76\u8fdb\u884c\u683c\u5f0f\u5316\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\n\nclass Program\n{\n    static void Main()\n    {\n        int number = 42;\n        string result = $\"{number:D5}\";  \/\/ \u4f7f\u7528\u63d2\u503c\u5b57\u7b26\u4e32\u8fdb\u884c\u683c\u5f0f\u5316\n        Console.WriteLine(result);  \/\/ \u8f93\u51fa 00042\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u91ca\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u63d2\u503c\u5b57\u7b26\u4e32 <code>\"{number:D5}\"<\/code> \u4f1a\u5c06 <code>number<\/code> \u8f6c\u6362\u4e3a\u81f3\u5c11 5 \u4f4d\uff0c\u524d\u9762\u8865\u96f6\u3002<\/li>\n\n\n\n<li>\u8fd9\u79cd\u65b9\u5f0f\u7b80\u6d01\u4e14\u5177\u6709\u8f83\u597d\u7684\u53ef\u8bfb\u6027\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\u62fc\u63a5\u6216\u5728\u8868\u8fbe\u5f0f\u4e2d\u76f4\u63a5\u4f7f\u7528\u683c\u5f0f\u5316\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u4f7f\u7528\u81ea\u5b9a\u4e49\u683c\u5f0f\u5316\u903b\u8f91<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u9700\u8981\u66f4\u590d\u6742\u7684\u903b\u8f91\u6216\u81ea\u5b9a\u4e49\u7684\u586b\u5145\u5b57\u7b26\uff0c\u53ef\u4ee5\u624b\u52a8\u7f16\u5199\u903b\u8f91\u6765\u5904\u7406\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u5e76\u8865\u5145\u96f6\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\n\nclass Program\n{\n    static void Main()\n    {\n        int number = 42;\n        int length = 5;  \/\/ \u76ee\u6807\u5b57\u7b26\u4e32\u957f\u5ea6\n        string result = number &lt; Math.Pow(10, length) ? new string('0', length - number.ToString().Length) + number : number.ToString();\n        Console.WriteLine(result);  \/\/ \u8f93\u51fa 00042\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u91ca\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u79cd\u65b9\u6cd5\u624b\u52a8\u8ba1\u7b97\u6240\u9700\u7684\u96f6\u6570\uff0c\u5e76\u4f7f\u7528 <code>new string('0', n)<\/code> \u6765\u521b\u5efa\u4e00\u4e2a\u6307\u5b9a\u6570\u91cf\u7684\u96f6\u3002<\/li>\n\n\n\n<li>\u9002\u7528\u4e8e\u66f4\u590d\u6742\u7684\u586b\u5145\u9700\u6c42\uff0c\u4f46\u76f8\u5bf9\u8f83\u590d\u6742\uff0c\u4e0d\u5982\u524d\u9762\u7684\u65b9\u6cd5\u7b80\u6d01\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u6bd4\u8f83\u548c\u9009\u62e9\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>ToString(\"D5\")<\/code><\/strong>\uff1a\u6700\u7b80\u5355\u3001\u76f4\u89c2\u7684\u65b9\u6cd5\uff0c\u9002\u5408\u9700\u8981\u56fa\u5b9a\u957f\u5ea6\u7684\u573a\u666f\u3002<\/li>\n\n\n\n<li><strong><code>PadLeft<\/code><\/strong>\uff1a\u7075\u6d3b\uff0c\u53ef\u4ee5\u6839\u636e\u6574\u6570\u7684\u5b9e\u9645\u957f\u5ea6\u8865\u5145\u96f6\uff0c\u9002\u5408\u52a8\u6001\u957f\u5ea6\u9700\u6c42\u3002<\/li>\n\n\n\n<li><strong><code>String.Format<\/code> \u548c \u63d2\u503c\u5b57\u7b26\u4e32<\/strong>\uff1a\u66f4\u52a0\u7075\u6d3b\uff0c\u4f46\u8bed\u6cd5\u7565\u663e\u5197\u957f\uff0c\u9002\u5408\u9700\u8981\u5728\u591a\u4e2a\u5730\u65b9\u4f7f\u7528\u683c\u5f0f\u5316\u7684\u60c5\u51b5\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u5b9a\u4e49\u903b\u8f91<\/strong>\uff1a\u9002\u5408\u5904\u7406\u7279\u6b8a\u7684\u3001\u590d\u6742\u7684\u683c\u5f0f\u9700\u6c42\uff0c\u4f46\u901a\u5e38\u4e0d\u5982\u5185\u7f6e\u65b9\u6cd5\u7b80\u6d01\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 C# \u4e2d\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u8865\u96f6\u5b57\u7b26\u4e32\u662f\u5e38\u89c1\u7684\u683c\u5f0f\u5316\u9700\u6c42\u3002\u672c\u6587\u4ecb\u7ecd\u4e86 5 \u79cd\u6709\u6548\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528\u00a0ToString( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[],"class_list":["post-1211","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=1211"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1211\/revisions"}],"predecessor-version":[{"id":1212,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1211\/revisions\/1212"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=1211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=1211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=1211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}