jquery split() 和 indexOf 导致“对象不支持此属性或方法"； [英] jquery split() and indexOf results in "Object doesn't support this property or method"

问题描述

我有以下代码:

var selected = $('#hiddenField').val().split(",");
...
if (selected.indexOf(id) > 0) {
   ... set value ...
}

我正在动态创建一个 CheckBoxList，并尝试通过将选定的 ID 放入隐藏字段来记住复选框的状态.

I'm dynamically creating a CheckBoxList, and trying to remember the state of the checkboxes by putting the selected IDs into the hidden field.

我收到一条错误消息，指出对象不支持此属性或方法".我的假设是 selected 是一个数组，它应该支持 indexOf.那不正确吗?

I get an error stating that "Object doesn't support this property or method". My assumption is that selected is an array, which should support indexOf. Is that incorrect?

推荐答案

有一个jQuery方法可以克服indexOf()的不足，可以使用.inArray() 代替:

There's an jQuery method to overcome the lack of indexOf(), you can use .inArray() instead:

var selected = $('#hiddenField').val().split(",");
if ($.inArray(id, selected) > -1) {
   ... set value ...
}

jQuery.inArray() 就是因为这个原因而存在的……如果您已经包含了 jQuery，则无需再次编写该函数.注意:这实际上返回一个数字，就像 indexOf() 一样.

jQuery.inArray() exists for just this reason...if you're including jQuery already, no need to write the function again. Note: This actually returns a number, like indexOf() would.

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