Xml Serialize List

Serialize List to XML The XmlMapper is able to serialize an entire Java bean into a document. To convert Java object to XML, we'll take a simple example with the nested object and arrays. Mac library cleaner.

C# Xml Serialize List Without Root
Xml Serialize List String C#
Xml Serialize List C#

One of the most common requests I get about serialization is to explain how to get collections to serialize out one way or another to XML. Specifically, developers are interested in being able to manipulate the hierarchy level of the collection within their XML and the names of the various XML elements. In today’s post, I’ll go over how to do these things with these two XML serializers.

First, let’s define a simple collection type:

publicclassLibrary

{

publicstring Librarian { get; set; }

publicList<Book> Books { get; set; }

}

publicclassBook

{

publicstring Title { get; set; }

}

Now, by default, you should be able to serialize this type out with XmlSerializer and DataContractSerializer to get XML that looks something like this:

<Books>

<Book>

<Title>Welcome to the Monkey House</Title>

</Book>

<Book>

<Title>American Gods</Title>

</Book>

<Book>

<Title>Bel Canto</Title>

</Book>

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<Librarian>Kelly</Librarian>

</Library>

Notice that you have two levels of hierarchy to represent the List<Book> collection. You have the <Books> tag and then you have a <Book> tag for every book in the collection.

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In some cases though, you may not want the extra <Books> tag. To eliminate the tag with XmlSerializer, simply update the Books member with an XmlElementAttribute that specifies the name you want to use for each item:

publicclassLibrary

{

publicstring Librarian { get; set; }

[XmlElement('Book')]

publicList<Book> Books { get; set; }

}

publicclassBook

{

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}

You should now notice that the instance is being serializer differently without the extra <Books> tag:

<Librarian>Kelly</Librarian>

<Book>

<Title>Welcome to the Monkey House</Title>

</Book>

<Book>

<Title>American Gods</Title>

</Book> Reddit free apps.

<Book>

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<Title>Bel Canto</Title>

</Book>

</Library>

Note, however, that this is only an option with XmlSerializer. DataContractSerializer does not support serializing out a collection as an unwrapped list of elements. In my first post, I indicated that XmlSerializer allows for more flexible XML than DataContractSerializer. This is just one of the numerous ways in which XmlSerializer can produce XML that DataContractSerializer simply cannot.

Changing the names of the XML tags

If you are happy with keeping your collection wrapped within an element, then you still may want to change the names of the XML tags. To do so with XmlSerializer, you can use XmlArrayAttribute and XmlArrayItemAttribute to configure the names. XmlArray defines the wrapper name and XmlArrayItem defines the item name:

publicclassLibrary

{

publicstring Librarian { get; set; }

[XmlArray('FavoriteBooks')]

[XmlArrayItem('FavoriteBook')]

publicList<Book> Books { get; set; }

}

publicclassBook

{

publicstring Title { get; set; } Beam robot software download.

}

C# Xml Serialize List Without Root

To change the names with DataContractSerializer, you will need to define a new type that derives from List<Book> and is marked with a CollectionDataContractAttribute. The DataMember name defines the wrapper name and the ItemName on the CollectionDataContract defines the item name:

[DataContract]

publicclassLibrary

{

[DataMember]

publicstring Librarian { get; set; }

[DataMember(Name='FavoriteBooks')]

publicBookList Books { get; set; }

}

publicclassBook

{

publicstring Title { get; set; }

}

[CollectionDataContract(ItemName='FavoriteBook')]

publicclassBookList : List<Book> { }

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In both of these cases, the XML that’s serialized out should look something like this:

<Title>Welcome to the Monkey House</Title>

</FavoriteBook>

<Title>American Gods</Title>

</FavoriteBook>

<Title>Bel Canto</Title>

</FavoriteBook>

</FavoriteBooks>

<Librarian>Kelly</Librarian>

</Library>

Active2 years, 9 months ago

I am having an issue serializing a list of objects, in my case, a list of the Class type User.

The code I am trying to use to serialize the list to an XML file only produces an XML file with the name of the Class(User) and nothing else.

What exactly am I doing wrong here. Just to be clear, this is for homework. I am at a loss as to what to change to get the data stored into the file. Thanks.

ArcadicArcadic

2 Answers

Kushal PatilKushal Patil

To be able to serialize / deserialize a class, the serializer requires a parameterless constructor. So, you need to add the parameterless constructors only to your classes