ASP按照字数限制自动截取标题内容

网络整理 - 09-06

通常在显示新闻标题的时候，有时候标题中会出现汉字和英文共存，直接用left截字符串会出现两条新闻标题长度不一，使用这个函数可以解决这个问题。

<%
'**************************************************
'函数名：gotTopic
'作用：截字符串，汉字一个算两个字符，英文算一个字符
'参数：str   ----原字符串
'       strlen ----截取长度
'返回值：截取后的字符串
'**************************************************
Function gotTopic(ByVal str, ByVal strlen)
    If str = "" Then
        gotTopic = ""
        Exit Function
    End If
    Dim l, t, c, i, strTemp
    str = Replace(Replace(Replace(Replace(str, " ", " "), """, Chr(34)), ">", ">"), "<", "<")
    l = Len(str)
    t = 0
    strTemp = str
    strlen = CLng(strlen)
    For i = 1 To l
        c = Abs(Asc(Mid(str, i, 1)))
        If c > 255 Then
            t = t + 2
        Else
            t = t + 1
        End If
        If t >= strlen Then
            strTemp = Left(str, i)
            Exit For
        End If
    Next
    If strTemp <> str Then
        strTemp = strTemp & "…"
    End If
    gotTopic = Replace(Replace(Replace(Replace(strTemp, " ", " "), Chr(34), """), ">", ">"), "<", "<")
End Function
%>
<%
str="一共11111w有汉字"
str1="一共有五汉字"
response.write "gotTopic
"
response.write gotTopic(str,10)&"
"&gotTopic(str1,10)&"
"
response.write "left
"
response.write Left(str,5)&"
"&Left(str1,5)
response.end
%>