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adauhuehkek最近做项目的时候遇到一个需求，需要在录入数据的时候检索已经存在的数据记录，并从中提取相似的数据进行展示并选择，以提高录入效率，简单的说，这个功能有点像在谷歌、百度搜索框里输入一个关键字，然后自动在下边列举出与关键字相似的信息供选择。好啦，现在功能说完了，下边就直入正题，把两种方法都列出来，以供需要的人去选择使用，其实两种方法的区别之处很小，主要是在返回检索结果时调用方法不一样，一种是map(),另一种是each(),这两个方法的区别我就不说了，简单总结就是map()要从建数组，each()直接返回原始数组，基于这一点，在内存开销上显然each()更好一点，当然，这个也不一概而论，看各自需求了。
服务端：
getAddress.asp
<!--#include file="Conn.asp" -->
<!--#include file="TypeJson.asp" -->
<%
dim myrs,sqlstr,singleJson,sqlstr2,q
Set myrs=server.CreateObject("adodb.recordset")
'q=Replace(Request.QueryString("q"),"'","''")
q=request.Item("param")
set singleJson = new MtRecToJson
sqlstr = "select address from callrecord where address like'%"&q&"%'"
sqlstr2="select id,usr,uid,usrType,corp from usr order by id"
sqlstr3="select top 1 * from usr where 1=2"
if q<>"" or q<>null then
myrs.Open sqlstr,Conn,1.1
else
myrs.Open sqlstr2,Conn,1.1
end if
singleJson.setRecordset(myrs)
response.write singleJson.getListJsonDB()
if not IsEmpty(myrs) then
if myrs.State>0 then
myrs.close
end if
set myrs = nothing
end if
conn.close
set conn = nothing
%>TypeJson.asp
<%
'JSON 接口通用类
Class MtRecToJson
private recordset
private json_str
private mask_fields
private Sub Class_Initialize
end sub
'public property let setRecordset(byval rec)
' set recordset = rec
'end property
'设置值 参数为ADODB.recordset对象
public sub setRecordset(rec)
if TypeName(rec)="Recordset" then
set recordset = rec
end if
end sub
'获得JSON
public Function getOneJsonDB()
dim i
json_str = "{"
if not IsEmpty(recordset) then
For i=0 To recordset.fields.count-1
json_str = json_str & """"&recordset.fields(i).name&""""
json_str = json_str & ":"
json_str = json_str & """"
if not recordset.eof then
json_str = json_str & recordset.fields(i).value
end if
json_str = json_str & """"
if i<recordset.fields.count-1 then
json_str = json_str & ","
end if
Next
end if
json_str = json_str & "}"
getOneJsonDB = json_str
end function
'获得JSON 格式的list
public Function getListJsonDB()
dim i,k
json_str = json_str & "["
if not IsEmpty(recordset) then
For k=0 To recordset.recordcount-1
if k>=recordset.pageSize then Exit for
If recordset.Eof Then Exit For
json_str = json_str & "{"
For i=0 To recordset.fields.count-1
json_str = json_str & """"&recordset.fields(i).name&""""
json_str = json_str & ":"
json_str = json_str & """"
if not recordset.eof then
json_str = json_str & recordset.fields(i).value
end if
json_str = json_str & """"
if i<recordset.fields.count-1 then
json_str = json_str & ","
end if
Next
json_str = json_str & "}"
if k<recordset.recordcount-1 then
json_str = json_str & ","
end if
recordset.MoveNext
next
end if
if(Right(json_str,1)=Chr(44)) then'查看拼接字符串最后是否有异常(偶尔存在逗号,不知道为什么),如果有就主动添加一个结尾字段
json_str = json_str & """end""]"
else
json_str = json_str & "]"
end if
getListJsonDB = json_str
end function
end class
%>客户端：
show.asp
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Remote JSON</title>
<link href="css/themes/default/easyui.css" rel="stylesheet" />
<link href="css/themes/icon.css" rel="stylesheet" />
<link href="css/themes/color.css" rel="stylesheet" />
<script type="text/javascript" src="script/jquery.min.js"></script>
<script type="text/javascript" src="script/jquery.easyui.min.js"></script>
<script type="text/javascript" src="script/easyui-lang-zh_CN.js"></script>
</head>
<body>
<h3>Remote JSON</h3>
<p>This sample shows how to use JSON to retrieve data from a remote site.</p>
<div ></div>
<div class="easyui-panel" >
<div >
<input id="s1" name="s1" class="easyui-combobox" />
</div>
</div>
<script language="javascript">
var myloader = function(param, success, error) {
var q = param.q || '';
if (q.length < 2) { return false }
$.ajax({
type: 'post',
url: 'getAddress.asp',
dataType: 'json',
//contentType: 'application/x-www-form-urlencoded:charset=UTF-8',
data: { param: q },
success: function(data) {
//alert(data);
// var items = $.map(data, function(value) {
// return {
// address: value
// };
// });
var items = $.each(data, function(value) {
return this; //遍历数组中的值
});
success(items);//调用loader的success方法，将items添加到下拉框中
},
error: function() {
error.apply(this);
}
});
}
$(function() {
$('#s1').combobox({
loader: myloader,
mode: 'remote',
valueField: 'address',
textField: 'address',
editable:'true',
hasDownArrow: false
});
})
</script>
</body>
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