17:["$","div",null,{"id":"main","children":[["$","div",null,{"id":"content","children":["$","div",null,{"id":"article-area","children":["$","div",null,{"id":"article-box","children":["$","div",null,{"className":"article","children":[["$","ul",null,{"className":"article-head","children":[["$","li",null,{"className":"publish","children":[["$","span",null,{"className":"month","children":["5月"," "]}],["$","span",null,{"className":"date","children":["19"," "]}],["$","span",null,{"className":"day","children":["週三"," "]}],["$","span",null,{"className":"year","children":"2010"}],["$","span",null,{"className":"time","children":"16:07"}]]}],["$","li",null,{"className":"title","id":"article-31498151","data-site-category":"不設分類","data-site-category-id":0,"data-article-link":"https://somnolentcat.pixnet.net/blog/posts/31498151","children":["$","h2",null,{"children":["$","a",null,{"href":"https://somnolentcat.pixnet.net/blog/posts/31498151","children":"C#字串處理(擷取字元)"}]}]}]]}],["$","div",null,{"className":"article-body","children":[["$","div",null,{"className":"article-content","children":[["$","div",null,{"className":"article-content-inner","id":"article-content-inner","suppressHydrationWarning":true,"dangerouslySetInnerHTML":{"__html":"\n

擷取左邊四個字
\n例如字串為.... string aa = \"歡迎光臨蝴蝶廢墟\";
\n
\n若要取得歡迎光臨四個字
\n
\nC#寫法:aa.Substring(0,4) //0字開始取4個字
\nASP寫法:left(aa,4)
\n
\n若要取得蝴蝶廢墟四個字
\n
\nC#寫法:aa.Substring(4,8) //4字開始取4字
\n或 aa.Substring(4) //4字取到最後
\nASP寫法:right(aa,4)
\n

"}}],["$","div",null,{"className":"tag-container-parent","children":[["$","div",null,{"className":"tag-container article-keyword","data-version":"a","children":[["$","div",null,{"className":"tag__header","children":["$","div",null,{"className":"tag__header-title","children":"文章標籤"}]}],["$","div",null,{"className":"tag__main","id":"article-footer-tags","children":[]}]]}],["$","div",null,{"className":"tag-container global-keyword","children":[["$","div",null,{"className":"tag__header","children":["$","div",null,{"className":"tag__header-title","children":"全站熱搜"}]}],["$","div",null,{"className":"tag__main","children":[]}]]}]]}],["$","div",null,{"className":"author-profile","children":[["$","div",null,{"className":"author-profile__header","children":"創作者介紹"}],["$","div",null,{"className":"author-profile__main","id":"mixpanel-author-box","children":[["$","a",null,{"children":["$","img",null,{"className":"author-profile__avatar","src":"https://pimg.1px.tw/somnolentcat/logo/somnolentcat.png","alt":"創作者貓小佑的頭像","loading":"lazy"}]}],["$","div",null,{"className":"author-profile__content","children":[["$","a",null,{"className":"author-profile__name","children":"貓小佑"}],["$","p",null,{"className":"author-profile__info","children":"【蝴蝶廢墟】"}]]}],["$","div",null,{"className":"author-profile__subscribe hoverable","children":["$","button",null,{"data-follow-state":"關注","className":"subscribe-btn member"}]}],["$","div",null,{"id":"pixnet-ad-article_bottom","children":" "}]]}]]}]]}],["$","p",null,{"className":"author","children":["貓小佑"," 發表在"," ",["$","a",null,{"href":"https://www.pixnet.net","children":"痞客邦"}]," ",["$","a",null,{"href":"#comments","children":"留言"}],"(","0",")"," ",["$","span",null,{"className":"author-views","children":["人氣(",["$","span",null,{"id":"BlogArticleCount-223677942","children":"35,919"}],")"]}]]}],["$","div",null,{"id":"pixnet-ad-content-left-right-wrapper","children":[["$","div",null,{"className":"left"}],["$","div",null,{"className":"right"}]]}]]}],["$","div",null,{"className":"article-footer","children":[["$","ul",null,{"className":"refer","children":[["$","li",null,{"children":["全站分類：",["$","a",null,{"href":"#","children":"$undefined"}]]}]," ",["$","li",null,{"children":["個人分類：",["$","a",null,{"href":"#","children":"程式設計天地區"}]]}]," "]}],["$","div",null,{"className":"back-to-top","children":["$","a",null,{"href":"#top","title":"back to the top of the page","children":"▲top"}]}]]}],["$","div",null,{"id":"pixnet-ad-after-footer"}]]}]}]}]}],["$","div",null,{"id":"links","children":["$","div",null,{"id":"sidebar__inner","children":[["$","div",null,{"id":"links-row-1","children":[["$","div","741881,741881",{"className":"hslice box","data-identifier":"pixSearch","id":"","children":[["$","h4",null,{"className":"box-title entry-title","children":"文章搜尋"}],["$","div",null,{"className":"box-text entry-content","suppressHydrationWarning":true,"dangerouslySetInnerHTML":{"__html":""}}]]}],["$","div","741882,741882",{"className":"hslice box","data-identifier":"pixLatestArticle","id":"hot-article","children":["$L25","$L26"]}],"$L27","$L28","$L29","$L2a","$L2b","$L2c"]}],"$L2d"]}]}]]}]

【蝴蝶廢墟】

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C#字串處理(擷取字元)

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