我有以下类实现IXmlSerializable。在实现WriteXml()时,我需要处理此类的字符串成员可能为空值的情况。处理此问题的最佳方法是什么?
目前,我正在使用默认构造函数,其中所有字符串属性都初始化为空字符串值。这样,当调用WriteXml()时,字符串不会为空。
我可以这样做的另一种方法是在xml中写入每个字符串之前使用String.IsNullOrEmpty进行检查。
有关如何改进此代码的任何建议?
public sealed class FaxSender : IXmlSerializable
{
#region Public Constants
private const string DEFAULT_CLASS_NAME = "FaxSender";
#endregion Public Constants
#region Public Properties
public string Name { get; set; }
public string Organization { get; set; }
public string PhoneNumber { get; set; }
public string FaxNumber { get; set; }
public string EmailAddress { get; set; }
#endregion Public Properties
#region Public Methods
#region Constructors
public FaxSender()
{
Name = String.Empty;
Organization = String.Empty;
PhoneNumber = String.Empty;
FaxNumber = String.Empty;
EmailAddress = String.Empty;
}
public FaxSender(
string name,
string organization,
string phoneNumber,
string faxNumber,
string emailAddress)
{
Name = name;
Organization = organization;
PhoneNumber = phoneNumber;
FaxNumber = faxNumber;
EmailAddress = emailAddress;
}
#endregion Constructors
#region IXmlSerializable Members
public System.Xml.Schema.XmlSchema GetSchema()
{
throw new NotImplementedException();
}
public void ReadXml(System.Xml.XmlReader reader)
{
throw new NotImplementedException();
}
public void WriteXml(System.Xml.XmlWriter xmlWriter)
{
try
{
// <sender>
xmlWriter.WriteStartElement("sender");
// Write the name of the sender as an element.
xmlWriter.WriteElementString(
"name",
this.Name.ToString(CultureInfo.CurrentCulture));
// Write the organization of the sender as an element.
xmlWriter.WriteElementString(
"organization",
this.Organization.ToString(CultureInfo.CurrentCulture));
// Write the phone number of the sender as an element.
xmlWriter.WriteElementString(
"phone_number",
this.PhoneNumber.ToString(CultureInfo.CurrentCulture));
// Write the fax number of the sender as an element.
xmlWriter.WriteElementString(
"fax_number",
this.FaxNumber.ToString(CultureInfo.CurrentCulture));
// Write the email address of the sender as an element.
xmlWriter.WriteElementString(
"email_address",
this.EmailAddress.ToString(CultureInfo.CurrentCulture));
// </sender>
xmlWriter.WriteEndElement();
}
catch
{
// Rethrow any exceptions.
throw;
}
}
#endregion IXmlSerializable Members
#endregion Public Methods
}
答案 0 :(得分:3)
我有一些建议:
1 - 仅实施IXmlSerializable
作为最后的手段,而是通过属性控制XML序列化。它更简单,更容易维护。它还处理属性为空引用。
[XmlRoot("sender")]
public sealed class FaxSender
{
[XmlElement("name")]
public string Name { get; set; }
[XmlElement("organization")]
public string Organization { get; set; }
[XmlElement("phone_number")]
public string PhoneNumber { get; set; }
[XmlElement("fax_number")]
public string FaxNumber { get; set; }
[XmlElement("email_address")]
public string EmailAddress { get; set; }
// Remaining code omitted
}
2 - 如果您要做的唯一事情是重新抛出每个异常,请不要将代码包装在try \ catch中;
3 - .NET中常量的指导原则是使用PascalCase,这将导致DefaultClassName
而不是DEFAULT_CLASS_NAME
。