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Àý×Ó£º int id = Convert.ToInt32(replace((Request.QueryString["id"]), ""));
public static string replace(string str, string str2)
{
str = str.Replace(";", str2);
str = str.Replace("&", str2);
str = str.Replace("<", str2);
str = str.Replace(">", str2);
str = str.Replace("'", str2);
str = str.Replace("--", str2);
str = str.Replace("/", str2);
str = str.Replace("%", str2);
str = str.Replace("~", str2);
str = str.Replace(",", str2);
str = str.Replace("`", str2);
str = str.Replace("!", str2);
str = str.Replace("@", str2);
str = str.Replace("#", str2);
str = str.Replace("$", str2);
str = str.Replace("^", str2);
str = str.Replace("*", str2);
str = str.Replace("(", str2);
str = str.Replace(")", str2);
str = str.Replace("+", str2);
str = str.Replace(":", str2);
str = str.Replace("<", str2);
str = str.Replace(">", str2);
str = str.Replace("?", str2);
 
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This has some predictable results that we can use for building queries. The root is always of the form (left = 1, right = 2 * (SELECT COUNT(*) from TreeTable)); leaf nodes always have (left + 1 = right); the BETWEEN predicate defines the subtrees; and so on. Here are some common queries that you can ......
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