我有一个名为ReclaimTotalAmount的字段,它显示来自c#模型的值。
<div class="container-left">
Reclaim Total: <span data-bind='text: model.ReclaimTotalAmount'></span>
</div>
我还有一个显示字段总和值的字段:
<div class="container-left">
Countered Total:<span data-bind='text: model.CounteredTotalAmount'></span>
</div>
要获取CounteredTotalAmount,我使用以下
self.model.CounteredTotalAmount = ko.computed(function () {
var SumCounterTotals = 0;
for (var i = 0; i < self.model.CounterReclaimViewModels().length; i++) {
SumCounterTotals += (
parseFloat(self.model.CounterReclaimViewModels()[i].CounteredTimeAmount())
+ parseFloat(self.model.CounterReclaimViewModels()[i].CounteredMileAmount())
+ parseFloat(self.model.CounterReclaimViewModels()[i].CounteredAppurtenanceAmount())
)
}
所以我需要检查天气,反击总数大于ReclaimTotal。我试过这个: 我创建了一个扩展
self.model.CounteredTotalAmount.extend({
greaterThan: { params: self.model.ReclaimTotalAmount, message: "Car number high must be greater than the low." }
});
那么这就是函数
ko.validation.rules['greaterThan'] = {
validator: function (val, other) {
if (val != null && val != "" && other != null) {
var first = parseInt(val);
var second = parseInt(ko.unwrap(other));
if (!isNaN(first) && !isNaN(second)) {
return first > second;
}
}
return true;
},
message: 'Must be greater than or equal to the other value'
};
除验证外,一切正常。如果Countered Total大于Reclaim total,我将无法生成错误消息... 感谢
答案 0 :(得分:1)
多个事情可能会出错,但是因为您还没有'仅发布一个完整的示例代码片段,您需要检查以下内容:
ko.validation.registerExtenders();
。 KO .extend({ })
返回扩展的observable,因此您需要使用结果覆盖现有属性:
self.CounteredTotalAmount = self.CounteredTotalAmount.extend({
greaterThan: {
params: self.ReclaimTotalAmount,
message: "Car number high must be greater than the low."
}
});
因为KO验证仅覆盖value
和checked
绑定以自动显示错误消息。因此,您需要使用validationMessage
绑定来显示错误,因为您在此处使用text
绑定:
<div class="container-left">
Countered Total:<span data-bind='text: CounteredTotalAmount'></span>
<span data-bind="validationMessage: CounteredTotalAmount"></span>
</div>
这是一个有效的JSFiddle,其中包含代码的简化版本。