通过 c# 在 XML 中不接受日期时间值

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问题描述

无法将 datetime.now 值传递给节点createddatetime".输出 xml 文件丢弃该节点.我使用了以下代码，

Unable to pass datetime.now value to a node 'createddatetime'.Output xml file discards the node. i used the following code,

   string PATH = "C:\\Samplex.xml";
    CreateEmptyFile(PATH);

    var data = new AutoCount();
    data.Product = "AutoCount Accounting";
    data.Version = "1.5";
    data.CreatedApplication = "BApp";
    data.CreatedBy = "Business Solutions";
    data.CreatedDateTime = DateTime.Now;   /* this line*/
    var serializer = new XmlSerializer(typeof(AutoCount));
    using (var stream = new StreamWriter(PATH))
    serializer.Serialize(stream, data);

结果是:

     <?xml version="1.0" encoding="utf-8"?>
     <AutoCount xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.autocountsoft.com/ac_accounting.xsd">
   <Product>AutoCount Accounting</Product>
    <Version>1.5</Version>
      <CreatedApplication>BApp</CreatedApplication>
       <CreatedBy>Business Solutions</CreatedBy>
    </AutoCount>

代替:

     <?xml version="1.0" encoding="utf-8"?>
    <AutoCount xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.autocountsoft.com/ac_accounting.xsd">
   <Product>AutoCount Accounting</Product>
    <Version>1.5</Version>
      <CreatedApplication>BApp</CreatedApplication>
       <CreatedBy>Business Solutions</CreatedBy>
       <CreatedDateTime>2015-05-03 18:01:35</CreatedDateTime>
    </AutoCount>

推荐答案

当 xsd.exe 为可选元素(例如带有 minOccurs="0" 的元素)生成类定义时对于映射到值类型(例如 DateTime)的类型，将生成一个附加属性以指示是否应序列化其值.

When a class definition is generated by xsd.exe for an optional element (one with minOccurs="0", for example) with a type that maps to a value type such as DateTime, an additional property will be generated to indicate whether or not its value should be serialized.

在这种情况下，CreatedDateTime 似乎是可选的，因此相关的 CreatedDateTimeSpecified 属性应设置为 true:

In this case it would seem CreatedDateTime is optional, so the related CreatedDateTimeSpecified property should be set to true:

data.CreatedDateTime = DateTime.Now;
data.CreatedDateTimeSpecified = true;

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createdDateTime