我的C#项目中有以下源代码,可以使用mongocsharpdriver 1.8.3版成功构建。但是在我将MongoDB C#驱动程序升级到2.0.1之后,编译失败并显示错误,指示找不到IBsonSerializationOptions
和DateTimeSerializationOptions
类(接口),并且还检查了所有命名空间程序集,似乎从最新版本的MongoDB C#驱动程序中删除了这些类型。
public void Apply(BsonMemberMap memberMap)
{
IBsonSerializationOptions options = null;
switch (memberMap.MemberInfo.MemberType)
{
case MemberTypes.Property:
PropertyInfo propertyInfo = (PropertyInfo)memberMap.MemberInfo;
if (propertyInfo.PropertyType == typeof(DateTime) ||
propertyInfo.PropertyType == typeof(DateTime?))
options = new DateTimeSerializationOptions(DateTimeKind.Local);
break;
case MemberTypes.Field:
FieldInfo fieldInfo = (FieldInfo)memberMap.MemberInfo;
if (fieldInfo.FieldType == typeof(DateTime) ||
fieldInfo.FieldType == typeof(DateTime?))
options = new DateTimeSerializationOptions(DateTimeKind.Local);
break;
default:
break;
}
memberMap.SetSerializationOptions(options);
}
我的问题是,在最新版本的MongoDB C#驱动程序中,这些类型的等价物是什么?
答案 0 :(得分:2)
在C#Driver 2.0中,您需要实现IBsonSerializer
public class LocalTimeSerializer : IBsonSerializer
{
public object Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
return context.Reader.ReadDateTime();
}
public void Serialize(BsonSerializationContext context, BsonSerializationArgs args, object value)
{
context.Writer.WriteDateTime(((DateTime)value).ToLocalTime().Ticks);
}
public Type ValueType { get { return typeof(DateTime); } }
}
你应该注册序列化器
BsonSerializer.RegisterSerializer(typeof(DateTime), new LocalTimeSerializer());
答案 1 :(得分:1)
在2.0版本的C#驱动程序中,序列化选项已被删除,并且已成为序列化程序本身的属性。您可以配置适当配置的序列化程序并使用它来代替设置序列化选项。
2.0版本驱动程序的约定实现如下:
public class LocalDateTimeConvention : IMemberMapConvention
{
public string Name
{
get { return "LocalDateTime"; }
}
public void Apply(BsonMemberMap memberMap)
{
if (memberMap.MemberType == typeof(DateTime))
{
var dateTimeSerializer = new DateTimeSerializer(DateTimeKind.Local);
memberMap.SetSerializer(dateTimeSerializer);
}
else if (memberMap.MemberType == typeof(DateTime?))
{
var dateTimeSerializer = new DateTimeSerializer(DateTimeKind.Local);
var nullableDateTimeSerializer = new NullableSerializer<DateTime>(dateTimeSerializer);
memberMap.SetSerializer(nullableDateTimeSerializer);
}
}
}