C# 使用循环将值添加到字典

Question

我正在使用 EasyPost(shipping API) 来获取运费。

我可以对发货进行硬编码，但这对我没有帮助。我需要根据用户选择添加数据。

下面是我的代码。如您所见，我有两批货物目前是硬编码的。我想删除硬编码的货件并在其周围添加一个循环并以这种方式添加货件。我可以通过变量自己传递包裹类型和权重。

所以如果用户有 5 个包裹我想添加 5 个发货。

提前致谢！

List<Dictionary<string, object>> shipments;

 shipments = new List<Dictionary<string, object>>() {
            new Dictionary<string, object>() {
                {"parcel", new Dictionary<string, object>() {{ "predefined_package", "MediumFlatRateBox" },  { "weight", 5 }}}
            },
            new Dictionary<string, object>() {
                {"parcel", new Dictionary<string, object>() {{ "predefined_package", "LargeFlatRateBox" },  { "weight", 15 }}}
            }
        };
parameters = new Dictionary<string, object>() {
            {"to_address", toAddress},
            {"from_address", fromAddress},
            {"reference", "USPS"},
            {"shipments", shipments}
                 };

Order order = Order.Create(parameters);

Answer 1

您将遍历您的包列表并将项目添加到您的词典列表中。

List<Package> packages = new List<Package>();
// add your packages here ...

List<Dictionary<string, object>> shipments = new List<Dictionary<string, object>>();
foreach(var p in packages){
    shipments.Add(new Dictionary<string, object>() {
          {"parcel", 
           new Dictionary<string, object>() {
               { "predefined_package", "MediumFlatRateBox" },  
               { "weight", p.Weight }}}
            });
}

这不是问题的全部内容，但是如果您尝试通过 HTTP 通过 POST JSON 与 API 进行通信（据我了解，您的目标是调用 APIs at https://www.easypost.com/docs/api.html#shipments)，这样使用匿名类型的对象会更易读，也更惯用：

var shipments = new List<object>();
foreach(var p in packages){
    shipments.Add(new {
          parcel = new {
              predefined_package = "MediumFlatRateBox",
              weight = p.Weight
          }
    });
}

var parameters = new {
   to_address = toAddress,
   from_address = fromAddress,
   reference = USPS,
   shipments = shipments
};

（抱歉缩进，我手头没有 IDE）

此外，文档表明 EasyPost 有一个 C# 库可以满足您的需求，它已经具有所有正确的类型，因此您不需要到处使用字典。参见：https://github.com/EasyPost/easypost-csharp：

Parcel parcel = new Parcel() {
    length = 8,
    width = 6,
    height = 5,
    weight = 10
};

Shipment shipment = new Shipment() {
    from_address = fromAddress,
    to_address = toAddress,
    parcel = parcel
};

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