ASP Exists 方法

Exists 方法返回一個布爾值,該布爾值指示在 Dictionary 對象中是否存在指定的 key。如果存在,返回 true,否則返回 false。
語法
DictionaryObject.Exists(key)
參數 | 描述 |
---|---|
key | 必需的。要搜索的 key 值。 |
實例
<%
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("Key exists!")
else
Response.Write("Key does not exist!")
end if
set d=nothing
%>
輸出:
Key exists!
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("Key exists!")
else
Response.Write("Key does not exist!")
end if
set d=nothing
%>
輸出:
Key exists!
