以编程方式将自定义控件中的编辑框绑定到表单域 [英] Binding an edit box within a custom control to a form field programatically

问题描述

我有一个笔记表单，其中包含一系列字段，例如 city_1、city_2、city_3 等.

I have a notes form with a series of fields such as city_1, city_2, city_3 etc.

我有一个 XPage，在那个 XPage 上我有一个重复.

I have an XPage and on that XPage I have a repeat.

重复基于具有十个值 1 - 10 的数组

The repeat is based on an array with ten values 1 - 10

var repArray = new Array() ;
for (var i=1;i<=10;i++) {
repArray.push(i) ;
}

返回(repArray);

return(repArray) ;

在重复中，我有一个自定义控件，用于显示 city_1 到 city_10 字段

Within the repeat I have a custom control which is used to surface the fields city_1 through city_10

repeat 有一个自定义属性 docdatasource 传入它还有一个名为 cityFieldName 的字符串自定义属性，它是使用重复计算的集合名称，以便在第一个重复行中为 city_1，在第二个中为 city_2 等.

The repeat has a custom property docdatasource which is passed in It also has a string custom property called cityFieldName which is computed using the repeat collection name so that in the first repeat row it is city_1 and in the second it is city_2 etc..

自定义控件上的可编辑文本字段使用EL公式绑定CompositeData.docdatasource[compositeData.cityFieldName]

The editable text field on the custom control is bound using the EL formula compositeData.docdatasource[compositeData.cityFieldName]

这很好用，但每次我添加新字段时，我都必须记住创建一个新的自定义属性，然后在父页面上引用它.

This works fine but each time I add new fields I have to remember to create a new custom property and then a reference to it on the parent page.

我希望能够简单地计算数据绑定，例如

I would like to be able to simply compute the data binding such as

compositeData.docdatasource['city_' + indexvar]

其中 indexvar 是表示当前行号的变量.

where indexvar is a variable representing the current row number.

这可能吗?我读到您不能在表达式语言中使用+".

Is this possible ? I have read that you cannot use '+' in Expression Language.

推荐答案

首先:您不需要计数器数组.只需 10 次即可(数字) - 也重复 10 次.但是你可以构建一个数组数组:

First: you wouldn't need an array for a counter. Just 10 would do (the number) - repeats 10 times too. But you could build an array of arrays:

var repArray = [];
for (var i=1;i<=10;i++) {
   repArray.push(["city","street","zip","country","planet"]) ;
}
return repArray;

那么你应该可以使用

#{datasource.indexvar[0]}

绑定城市，

#{datasource.indexvar[1]}

绑定街道.等

有一点弄乱数组序列的危险，如果这是一个问题，您需要在此处更深入地使用对象.

Carries a little the danger of messing with the sequence of the array, if that's a concern you would need to dig deeper in using an Object here.

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