{"id":172175,"date":"2024-11-07T10:56:19","date_gmt":"2024-11-07T02:56:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/172175\/"},"modified":"2024-11-07T10:56:20","modified_gmt":"2024-11-07T02:56:20","slug":"vb-%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e8%a9%b3%e8%a7%a3-vb-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/172175\/","title":{"rendered":"VB \u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u8a73\u89e3 (vb \u6578\u64da\u5eab\u6578\u64da\u985e\u578b)"},"content":{"rendered":"<h1 id=\"vb-%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e8%a9%b3%e8%a7%a3-vb-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">VB \u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u8a73\u89e3 (VB \u6578\u64da\u5eab\u6578\u64da\u985e\u578b)<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002Visual Basic\uff08VB\uff09\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u4ee5\u4fbf\u958b\u767c\u8005\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e VB \u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u9078\u64c7\u548c\u4f7f\u7528\u9019\u4e9b\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"1-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-TiNHcbWqxS\">1. \u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u7528\u4f86\u5b9a\u7fa9\u6578\u64da\u7684\u985e\u578b\u3002\u9019\u4e9b\u6578\u64da\u985e\u578b\u6c7a\u5b9a\u4e86\u6578\u64da\u7684\u5b58\u5132\u65b9\u5f0f\u3001\u53ef\u64cd\u4f5c\u6027\u4ee5\u53ca\u6578\u64da\u7684\u6709\u6548\u6027\u3002\u5728 VB \u4e2d\uff0c\u5e38\u898b\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u5305\u62ec\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u4e32\u3001\u65e5\u671f\u7b49\u3002<\/p>\n<h2 id=\"2-%e5%b8%b8%e8%a6%8b%e7%9a%84-vb-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">2. \u5e38\u898b\u7684 VB \u6578\u64da\u5eab\u6578\u64da\u985e\u578b<\/h2>\n<h3 id=\"2-1-%e6%95%b4%e6%95%b8%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">2.1 \u6574\u6578\u985e\u578b<\/h3>\n<p>\u6574\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u6574\u6578\u503c\u3002\u5728 VB \u4e2d\uff0c\u6574\u6578\u985e\u578b\u901a\u5e38\u6709\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n<ul>\n<li><code>Integer<\/code>: 32 \u4f4d\u6574\u6578\uff0c\u7bc4\u570d\u5f9e -2,147,483,648 \u5230 2,147,483,647\u3002<\/li>\n<li><code>Long<\/code>: 64 \u4f4d\u6574\u6578\uff0c\u7bc4\u570d\u5f9e -9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u7528\u6236\u7684\u5e74\u9f61\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Integer<\/code> \u985e\u578b\uff1a<\/p>\n<pre><code>Dim userAge As Integer\nuserAge = 25\n<\/code><\/pre>\n<h3 id=\"2-2-%e6%b5%ae%e9%bb%9e%e6%95%b8%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">2.2 \u6d6e\u9ede\u6578\u985e\u578b<\/h3>\n<p>\u6d6e\u9ede\u6578\u985e\u578b\u7528\u65bc\u5b58\u5132\u5e36\u5c0f\u6578\u7684\u6578\u503c\u3002VB \u4e2d\u7684\u6d6e\u9ede\u6578\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>Single<\/code>: 32 \u4f4d\u6d6e\u9ede\u6578\uff0c\u9069\u5408\u5b58\u5132\u5c0f\u6578\u3002<\/li>\n<li><code>Double<\/code>: 64 \u4f4d\u6d6e\u9ede\u6578\uff0c\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5b58\u5132\u7522\u54c1\u7684\u50f9\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Double<\/code> \u985e\u578b\uff1a<\/p>\n<pre><code>Dim productPrice As Double\nproductPrice = 19.99\n<\/code><\/pre>\n<h3 id=\"2-3-%e5%ad%97%e4%b8%b2%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">2.3 \u5b57\u4e32\u985e\u578b<\/h3>\n<p>\u5b57\u4e32\u985e\u578b\u7528\u65bc\u5b58\u5132\u6587\u672c\u6578\u64da\u3002\u5728 VB \u4e2d\uff0c\u5b57\u4e32\u985e\u578b\u70ba <code>String<\/code>\uff0c\u53ef\u4ee5\u5b58\u5132\u4efb\u610f\u9577\u5ea6\u7684\u5b57\u7b26\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5b58\u5132\u7528\u6236\u7684\u59d3\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>String<\/code> \u985e\u578b\uff1a<\/p>\n<pre><code>Dim userName As String\nuserName = \"\u5f35\u4e09\"\n<\/code><\/pre>\n<h3 id=\"2-4-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e9%a1%9e%e5%9e%8b-TiNHcbWqxS\">2.4 \u65e5\u671f\u548c\u6642\u9593\u985e\u578b<\/h3>\n<p>\u65e5\u671f\u548c\u6642\u9593\u985e\u578b\u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\u4fe1\u606f\u3002\u5728 VB \u4e2d\uff0c\u4f7f\u7528 <code>Date<\/code> \u985e\u578b\u4f86\u8868\u793a\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5b58\u5132\u7528\u6236\u7684\u8a3b\u518a\u65e5\u671f\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>Date<\/code> \u985e\u578b\uff1a<\/p>\n<pre><code>Dim registrationDate As Date\nregistrationDate = #2023\/10\/01#\n<\/code><\/pre>\n<h2 id=\"3-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%98%a0%e5%b0%84-TiNHcbWqxS\">3. \u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u985e\u578b\u6620\u5c04<\/h2>\n<p>\u5728\u5c07 VB \u6578\u64da\u985e\u578b\u6620\u5c04\u5230\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u4e0d\u540c\u6578\u64da\u5eab\u7cfb\u7d71\u7684\u6578\u64da\u985e\u578b\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\u3002\u4f8b\u5982\uff0c\u5728 SQL Server \u4e2d\uff0c<code>Integer<\/code> \u5c0d\u61c9\u65bc <code>INT<\/code>\uff0c\u800c <code>String<\/code> \u5c0d\u61c9\u65bc <code>VARCHAR<\/code>\u3002\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"4-%e7%b5%90%e8%ab%96-TiNHcbWqxS\">4. \u7d50\u8ad6<\/h2>\n<p>\u4e86\u89e3 VB \u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u6b63\u78ba\u9078\u64c7\u548c\u4f7f\u7528\u6578\u64da\u985e\u578b\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u5b8c\u6574\u6027\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u61c9\u7528 VB \u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eVB\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u4e86\u89e3\u5404\u985e\u578b\u7684\u7279\u6027\u53ca\u5176\u5728\u6578\u64da\u8655\u7406\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-172175","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172175","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=172175"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172175\/revisions"}],"predecessor-version":[{"id":172176,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172175\/revisions\/172176"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=172175"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=172175"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=172175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}