Question

我得到了以下JSON对象：

[{"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 5, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 6, "fields": {"value": 5.0, "date": "2016-09-07"}}, {"model": "pricing.cashflow", "pk": 7, "fields": {"value": 3.0, "date": "2016-09-28"}}, {"model": "pricing.cashflow", "pk": 8, "fields": {"value": 3.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 9, "fields": {"value": 5.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 10, "fields": {"value": 5.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 11, "fields": {"value": 4.0, "date": "2016-09-08"}}, {"model": "pricing.cashflow", "pk": 12, "fields": {"value": 8.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 13, "fields": {"value": 3.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 14, "fields": {"value": 5.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 15, "fields": {"value": 8.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 16, "fields": {"value": 4.0, "date": "2016-09-08"}}, {"model": "pricing.cashflow", "pk": 17, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 18, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 19, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 20, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 21, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 22, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 23, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 24, "fields": {"value": 3.0, "date": "2016-09-16"}}]

我想得到字段＆＃34;值＆＃34;和＆＃34;日期＆＃34;。我试着这样做（通常什么是好方法？）但不起作用..

$http.get("/getcashflow/")
      .success(function(data) {
            for(var cf in data){
                alert(cf.fields.value.data*);
            }
      });
    };

Answer 1

在纯JS（ES6）中：

var input = [
  {"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}},
  {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}},
  {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}},
  {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}
  ];
input.forEach(item => {console.log("value -> " + item.fields.value + " and date -> " + item.fields.date)}); 

// value -> 4 and date -> 2016-09-09
// value -> 3 and date -> 2016-09-01
// value -> 3 and date -> 2016-09-01
// value -> 3 and date -> 2016-09-01

Answer 2

根据您要执行的操作，您应该使用for...in循环，而不是for...in循环。在数组上使用for...in将返回每个元素的索引，这在您的情况下是无用的，除非您想通过说数据[cf]来引用回原始数组，这违背了使用目的首先是var data = [{"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 5, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 6, "fields": {"value": 5.0, "date": "2016-09-07"}}, {"model": "pricing.cashflow", "pk": 7, "fields": {"value": 3.0, "date": "2016-09-28"}}, {"model": "pricing.cashflow", "pk": 8, "fields": {"value": 3.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 9, "fields": {"value": 5.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 10, "fields": {"value": 5.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 11, "fields": {"value": 4.0, "date": "2016-09-08"}}, {"model": "pricing.cashflow", "pk": 12, "fields": {"value": 8.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 13, "fields": {"value": 3.0, "date": "2016-09-22"}}, {"model": "pricing.cashflow", "pk": 14, "fields": {"value": 5.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 15, "fields": {"value": 8.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 16, "fields": {"value": 4.0, "date": "2016-09-08"}}, {"model": "pricing.cashflow", "pk": 17, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 18, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 19, "fields": {"value": 5.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 20, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 21, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 22, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 23, "fields": {"value": 3.0, "date": "2016-09-16"}}, {"model": "pricing.cashflow", "pk": 24, "fields": {"value": 3.0, "date": "2016-09-16"}}]; data.forEach(function (cf) { console.log(cf.fields.value); });循环。

public static class FocusExtension
{
    public static bool GetIsFocused(DependencyObject obj)
    {
        return (bool)obj.GetValue(IsFocusedProperty);
    }

    public static void SetIsFocused(DependencyObject obj, bool value)
    {
        obj.SetValue(IsFocusedProperty, value);
    }

    public static readonly DependencyProperty IsFocusedProperty =
        DependencyProperty.RegisterAttached(
            "IsFocused", typeof(bool), typeof(FocusExtension),
            new UIPropertyMetadata(false, null, OnCoerceValue));

    private static object OnCoerceValue(DependencyObject d, object baseValue)
    {
        if ((bool)baseValue)
        {
            ((UIElement)d).Focus();
        }
        else if (((UIElement)d).IsFocused)
        {
            Keyboard.ClearFocus();
        }
        return (bool)baseValue;
    }
}

Answer 3

在javascript中，JSON反序列化为对象。要访问该对象的成员，请使用dot访问器。在您的情况下，您要查找的值可以data[cf].fields.value.data

进行访问

请注意，for in循环返回对象或数组的键，而不是实际值。（例如，在循环的第一次迭代中，cf等于零，而不是第一个对象）

$http.get("/getcashflow/")
      .success(function(data) {
            for(var cf in data){
                alert(data[cf].fields.value.data);
            }
      });
    };

无法从JSON访问对象

3 个答案: