[英]How do Serialize this C# object to JSON?
这是我想要的输出:
"key": "rbp_role_config",
"value": {
"customer_group_1": {
"group_price": {
"price": "150",
"price_type": "currency"
}
},
"customer_group_2": {
"group_price": {
"price": "125",
"price_type": "currency"
}
}
}
这是我的课程:
[DataContract]
public class ProductMeta
{
/// <summary>
/// Meta ID.
/// read-only
/// </summary>
[DataMember(EmitDefaultValue = false)]
public int? id { get; set; }
/// <summary>
/// Meta key.
/// </summary>
[DataMember(EmitDefaultValue = false)]
public string key { get; set; }
/// <summary>
/// Meta value.
/// </summary>
[DataMember(EmitDefaultValue = false)]
public object value { get; set; }
}
[DataContract]
public class ProductPriceGroup
{
/// <summary>
/// Meta Value
/// </summary>
[DataMember(EmitDefaultValue = false)]
public ProductGroupPrice group_price { get; set; }
}
[DataContract]
public class ProductGroupPrice
{
/// <summary>
/// Product Price
/// </summary>
[DataMember(EmitDefaultValue = false)]
public string price { get; set; }
/// <summary>
/// Product Price Type
/// </summary>
[DataMember(EmitDefaultValue = false)]
public string price_type { get; set; }
}
将从SQL表中获取值“ customer_group_1”,“ customer_group_2”等,因此它们必须是动态属性。
最后,这里是使用类的代码:
using (var connection = new SqlConnection(_connectionString))
using (var command = new SqlCommand(queryString, connection))
{
try
{
connection.Open();
}
catch (SqlException sqlEx)
{
log.Error(sqlEx.Message);
return null;
}
var reader = command.ExecuteReader();
var productMetaDict = new Dictionary<string, ProductPriceGroup>();
while (reader.Read())
{
try
{
var group = StringToSlug(reader["customerpricegroup"].ToString());
productMetaDict.Add(group, new ProductPriceGroup() { group_price = new ProductGroupPrice { price = reader["regular_price"].ToString(), price_type = "currency" } });
}
catch (SqlException sqlEx)
{
log.Error(sqlEx.Message);
}
}
if (productMetaDict.Count > 0)
{
var productMeta = new ProductMeta();
productMeta.key = "rbp_role_config";
productMeta.value = productMetaDict;
return productMeta;
};
我已经在EBrown的一些帮助下对代码进行了重新整理,现在是要返回所需的JSON,但是由于某种原因,在尝试将其添加到产品的meta数据属性时,我遇到了First Chance Exceptions。
出于说明目的,转换为字符串时,我得到以下信息:
"key": "rbp_role_config",
"value": {
"customer_group_1": {
"group_price": {
"price": "100,70",
"price_type": "currency"
}
},
"customer_group_2": {
"group_price": {
"price": "100,70",
"price_type": "currency"
}
}
}
我有一个具有以下属性的Product类:
/// <summary>
/// Meta data. See Product - Meta data properties
/// </summary>
[DataMember(EmitDefaultValue = false)]
public List<ProductMeta> meta_data { get; set; }
尝试将元数据对象添加到此列表时,出现“发生类型'System.NullReferenceException'的第一次机会异常”。 “ p”是产品对象。 我检查过,p不为空,productMeta不为空。
p.meta_data.Add(productMeta);
编辑:我很傻,忘了为meta_data属性新建一个列表...
p.meta_data = new List<ProductMeta>();
现在,我没有任何第一次机会例外。
全部做完! 谢谢您的帮助!
看起来并不那么困难,只需生成一个与您的JSON相同的结构的POCO(或其中的一组)即可:
public class Root
{
public ProductMeta[] meta_data { get; set; }
}
public class ProductMeta
{
public int? id { get; set; }
public string key { get; set; }
public Dictionary<string, ProductPriceGroup> value { get; set; }
}
public class ProductPriceGroup
{
public ProductGroupPrice group_price { get; set; }
}
public class ProductGroupPrice
{
public string price { get; set; }
public object price_type { get; set; }
}
这是我的一代代码:
var serObj = new Root(); serObj.meta_data = new ProductMeta[1]; serObj.meta_data[0] = new ProductMeta(); serObj.meta_data[0].id = 220910; serObj.meta_data[0].key = "rbp_role_config"; serObj.meta_data[0].value = new Dictionary<string, ProductPriceGroup>(); serObj.meta_data[0].value.Add("customer_group_1", new ProductPriceGroup() { group_price = new ProductGroupPrice { price = "150", price_type = "currency" } }); serObj.meta_data[0].value.Add("customer_group_2", new ProductPriceGroup() { group_price = new ProductGroupPrice { price = "125", price_type = "currency" } }); var jss = new JavaScriptSerializer(); var result = jss.Serialize(serObj); Console.WriteLine(result);
产生的JSON(我将其格式化以进行比较,实际生成的内容是单行/无缩进/间隔):
{
"meta_data": [
{
"id":220910,
"key":"rbp_role_config",
"value": {
"customer_group_1": {
"group_price": {
"price":"150",
"price_type":"currency"
}
},
"customer_group_2": {
"group_price": {
"price":"125",
"price_type":"currency"
}
}
}
}]
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.