Flex 3 绑定问题
我有一个自定义的 ActionScript 类:
package EntityClasses
{
import mx.collections.ArrayCollection;
[RemoteClass(alias="tkatva.tt.entities.CompanyInfo")]
[Bindable]
public class CompanyInfo
{
public var companyInfoId:int;
public var companyName:String;
public var streetAddress:String;
public var postNumber:String;
public var city:String;
public var country:String;
public var email:String;
public var businessIdentityCode:String;
public var intBic:String;
public var homepageUrl:String;
public var lastUpdatedBy:String;
public var lastUpdateDate:Date;
public var version:int;
public var settingGroupList:ArrayCollection;
public var bankAccountList:ArrayCollection;
public var personList:ArrayCollection;
}
}
我想将这些值绑定到文本框,以便当用户向文本框键入信息时,它也会填充到类中。 Flex 3 是双向的,以便使用 [Bindable] 标记类,例如我可以将值绑定到文本框吗?
这是我的 mxml 文件,我尝试在其中绑定类:
import mx.rpc.events.ResultEvent;
import EntityClasses.CompanyInfo;
[Bindable]
public var company:CompanyInfo;
public var uuid:String;
private function init():void {
company = new CompanyInfo();
}
private function getCompanyInfo():void {
try {
company = TtRo.getCompanyInfo(uuid);
} catch (Exception) {
}
}
private function handleClick():void {
this.txtInfo.text = "COMPANY:" + company.companyName;
TtRo.addCompanyInfo(company,uuid);
}
private function handleAdding(e:ResultEvent):void {
var res:Boolean;
res = e.result as Boolean;
if (res) {
this.txtInfo.text = "OK";
} else {
this.txtInfo.text = "NOTOK";
}
}
]]>
</mx:Script>
<mx:TextInput x="194" y="10" id="txtCname" text="{company.companyName}"/>
<mx:TextInput x="194" y="40" id="txtStreet" text="{company.streetAddress}"/>
<mx:TextInput x="194" y="70" id="txtPostnumber" text="{company.postNumber}"/>
<mx:TextInput x="194" y="100" id="txtCity" text="{company.city}"/>
<mx:TextInput x="194" y="130" id="txtCountry" text="{company.country}"/>
<mx:TextInput x="194" y="160" id="txtEmail" text="{company.email}"/>
<mx:TextInput x="194" y="190" id="txtBic" text="{company.businessIdentityCode}"/>
<mx:TextInput x="194" y="220" id="txtIntBic" text="{company.intBic}"/>
<mx:TextInput x="194" y="250" id="txtUrl" text="{company.homepageUrl}"/>
这有什么问题吗? Flex 编译器向我显示此类警告:数据绑定将无法检测对“公司”的分配。
我是 Flex 新手,如有任何帮助,我们将不胜感激...谢谢...
I have a custom ActionScript class:
package EntityClasses
{
import mx.collections.ArrayCollection;
[RemoteClass(alias="tkatva.tt.entities.CompanyInfo")]
[Bindable]
public class CompanyInfo
{
public var companyInfoId:int;
public var companyName:String;
public var streetAddress:String;
public var postNumber:String;
public var city:String;
public var country:String;
public var email:String;
public var businessIdentityCode:String;
public var intBic:String;
public var homepageUrl:String;
public var lastUpdatedBy:String;
public var lastUpdateDate:Date;
public var version:int;
public var settingGroupList:ArrayCollection;
public var bankAccountList:ArrayCollection;
public var personList:ArrayCollection;
}
}
And I want to bind these values to textBoxes, so that when user types information to the textBoxes it is populated in the class too. Is Flex 3 bidirectional so that marking the class with [Bindable] I can bind the values to a textbox for example?
This is my mxml file in which I try to bind the class:
import mx.rpc.events.ResultEvent;
import EntityClasses.CompanyInfo;
[Bindable]
public var company:CompanyInfo;
public var uuid:String;
private function init():void {
company = new CompanyInfo();
}
private function getCompanyInfo():void {
try {
company = TtRo.getCompanyInfo(uuid);
} catch (Exception) {
}
}
private function handleClick():void {
this.txtInfo.text = "COMPANY:" + company.companyName;
TtRo.addCompanyInfo(company,uuid);
}
private function handleAdding(e:ResultEvent):void {
var res:Boolean;
res = e.result as Boolean;
if (res) {
this.txtInfo.text = "OK";
} else {
this.txtInfo.text = "NOTOK";
}
}
]]>
</mx:Script>
<mx:TextInput x="194" y="10" id="txtCname" text="{company.companyName}"/>
<mx:TextInput x="194" y="40" id="txtStreet" text="{company.streetAddress}"/>
<mx:TextInput x="194" y="70" id="txtPostnumber" text="{company.postNumber}"/>
<mx:TextInput x="194" y="100" id="txtCity" text="{company.city}"/>
<mx:TextInput x="194" y="130" id="txtCountry" text="{company.country}"/>
<mx:TextInput x="194" y="160" id="txtEmail" text="{company.email}"/>
<mx:TextInput x="194" y="190" id="txtBic" text="{company.businessIdentityCode}"/>
<mx:TextInput x="194" y="220" id="txtIntBic" text="{company.intBic}"/>
<mx:TextInput x="194" y="250" id="txtUrl" text="{company.homepageUrl}"/>
Whats wrong with this? The flex compiler shows me this kind of warnings: Data binding will not be able to detect assignments to "company".
Im new to Flex and any help would be appriciated... Thanks...
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不,Flex 数据绑定不是双向的。您必须使用 BindingUtils.bindProperty()
No, Flex data binding is not bidirectional. You have to explicitly bind the
text
property of text fields back to the corresponding properties of thecompany
object using BindingUtils.bindProperty()如果您在 MXML 组件中使用它,则使用 mx:Bindable 标记将反向绑定添加到一个位置可能会更具可读性
。
If you're using it in MXML components it might be more readable if you add the reverse binding in one place using the mx:Bindable tag
eg.
Flex 3 Cookbook 在第 11.9 章和第 11.9 章中有很多此类工作的秘诀。第 14 章
Flex 3 Cookbook has a lot of recipes for this sort of work in chapter 11.9 & ch 14
您需要将变量本身标记为可绑定:
欢迎使用 Flex 数据绑定,它很可爱:)
You need to mark the variables themselves as bindable:
Welcome to Flex data binding, its lovely :)