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ASP Exists 方法


❮ 字典对象完整参考

Exists 方法返回一个布尔值,指示指定的键是否存在于 Dictionary 对象中。如果键存在,则返回 true,否则返回 false。

语法

DictionaryObject.Exists(key)

参数 描述
key 必需。要搜索的键值。

示例

<%
dim d
set d=Server.CreateObject("Scripting.Dictionary")
d.Add "n","Norway"
d.Add "i","Italy"
d.Add "s","Sweden"

if d.Exists("n")=true then
  Response.Write("键存在!")
else
  Response.Write("键不存在!")
end if

set d=nothing
%>

输出

键存在!

❮ 字典对象完整参考
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