if (!IsPostBack) { //如果请求ID为空,则重写URL为:~/index.aspx?ID=shouji.115sou.com if (Request.QueryString["ID"]==null || Request.QueryString["ID"].Trim()=="") { HttpContext.Current.RewritePath("~/index.aspx?ID=shouji.115sou.com&qu
Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: "tree" Output: "eert" Explanation: 'e' appears twice while 'r' and 't' both appear once. So 'e' must appear before both 'r' and 't'. Th