我以前知道并回答了类似的问题,但是我的代码有特定问题。当更改使用id="SITE"
的下拉列表时,我希望使用id="YARD"
的下拉列表填充该站点的码数。这是我的组件CFC代码(在称为ajaxfunctions.cfc的页面中(:
<cfcomponent output="false">
<!--- Get YARDS dataset based on SITE --->
<cffunction name="getYards" access="remote" returntype="query" />
<cfargument name="Site" type="string" required="true" />
<cfquery name="rs_Yards" datasource="abc" username="notReal1" password="notReal2" >
<!--- SQL code here --->
</cfquery>
<cfreturn rs_Yards />
</cffunction>
<cfcomponent>
这是我的呼叫页面的主题部分的接收代码:
<script>
$(document).ready(function() {
$("#SITE").change(function() {
alert( "SITE has changed." );// testing to see if jQuery works
// empty YARD dropdown
$("#YARD").empty();
// perform ajax
$.ajax({
type: "GET",
url: "AjaxFunctions.cfc",
data: {
method: "getYards",
Site: $("#SITE").val()
},
datatype: "json",
success: function(data) {
alert("We received the data."+data);
$.each(data, function () {
$("#YARD").append($("<option></option>").val(this['ITEMID']).html(this['ITEMDESC']));
}
}
});
});
});
</script>
乳清,我会尝试使用代码,绝对什么也没有发生。当我只评论这些行
时$.each(data, function () {
$("#YARD").append($("<option></option>").val(this['ITEMID']).html(this['ITEMDESC']));
}
然后,我收到通知"站点已更改"和院子下拉列表,但是"我们收到数据..."警报看起来像是错误页面中的HTML代码。我想我可以担心以后更新院子下拉列表,现在我担心只收到查询中的数据。
您是否可以更改cffunction?ColdFusion的查询格式很愚蠢。IMO,更改功能更简单。返回带有您想要的任何关键名称的结构数组,例如" Yard"。(不要忘记范围范围变量并将returntype
更改为"数组"(
<cfcomponent output="false">
<cffunction name="getYards" access="remote" returntype="array" >
<cfargument name="Site" type="string" required="true" />
<cfset var rs_Yards = "">
<cfset var response = []>
<!--- demo data. replace this with your cfquery --->
<cfset rs_Yards = QueryNew("")>
<cfset queryAddColumn(rs_Yards, "Yard", ["X-745-C ","X-745-C5","X-745-E ","X-745-G "])>
<cfloop query="rs_Yards">
<cfset arrayAppend(response, { "yard": rs_Yards.yard })>
</cfloop>
<cfreturn response />
</cffunction>
</cfcomponent>
结合了我在评论中提到的其他更改:
- JavaScript对案例敏感。将
datatype
更改为dataType
(资本" t"( - 将URL更改以从组件请求JSON:
AjaxFunctions.cfc?method=getYards&returnformat=json
最后,在$.each()
环中使用新的密钥名称" Yard"。
jQuery:
$(document).ready(function() {
$("#SITE").change(function() {
$("#YARD").empty();
$.ajax({
type: "GET",
url: "AjaxFunctions.cfc?method=getYards&returnformat=JSON",
data: {Site: $("#SITE").val()},
dataType: "json",
success: function(data) {
$.each(data, function() {
$("#YARD").append($("<option></option>").val(this.yard).text(this.yard));
});
}
});
});
});
html:
<form>
<select id="SITE" name="SITE">
<option value="123">One</option>
<option value="456">Two</option>
</select>
<select id="YARD">
<option value="123">select somthing</option>
</select>
</form>
非常感谢@Ageax的所有帮助。我走了一条更简单的路线。这是我的功能:
<cfcomponent output="false">
<!--- Get YARDS dataset based on SITE --->
<cffunction name="getYards" access="remote" returntype="string" returnformat="plain" >
<cfargument name="Site" type="string" required="true" />
<cfquery name="rs_Yards" datasource="MyDatasource" >
<!--- SQL code here --->
</cfquery>
<cfset myList = ValueList(rs_Yards.Yard)> <!--- convert query results to list --->
<cfreturn MyList />
</cffunction>
</cfcomponent>
这是我在呼叫页面上的jQuery:
<!--- jQuery/AJAX to autofill dropdowns --->
<script>
$(document).ready(function() {
$("#SITE").change(function() { // when the SITE dropdown changes
$("#YARD").empty(); // empty the YARD dropdown
$.ajax({
type: "GET",
url: "AjaxFunctions.cfc",
data: {
Site: $("#SITE").val(),
Method: "getYards"
},
dataType: "text",
success: function(data) {
var options = data.split(","); // convert returned list to array
var select = document.getElementById('YARD');
for(var i=0;i<options.length; i++)
{
var options2 = $.trim(options[i]); // clean up label portion
$("#YARD").append($("<option></option>").val(options[i]).text(options2)); // append options to YARD dropdown
}
}
});
});
});
</script>
希望这对别人有帮助。