How to: Write Object Data to an XML File
This example writes the object from a class to an XML file using the XmlSerializer class.
Namespace: System.Xml.Serialization
Assembly: System.Xml (in System.Xml.dll)
Example
This code example defines a class named Book, creates an instance of the class, and uses XML serialization to write the instance to an XML file.
Code similar to this is available as an IntelliSense code snippet. In the Code Snippet Manager, it is located in XML. For more information, see Code Snippets.
public class XMLWrite
{ static void Main(string[] args)
{
WriteXML();
} public class Book
{
public String title;
} public static void WriteXML()
{
Book overview = new Book();
overview.title = "Serialization Overview";
System.Xml.Serialization.XmlSerializer writer =
new System.Xml.Serialization.XmlSerializer(typeof(Book)); var path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "//SerializationOverview.xml";
System.IO.FileStream file = System.IO.File.Create(path); writer.Serialize(file, overview);
file.Close();
}
}
Compiling the Code
The class must have a public constructor without parameters.
Robust Programming
The following conditions may cause an exception:
The class being serialized does not have a public, parameterless constructor.
The file exists and is read-only (IOException).
The path is too long (PathTooLongException).
The disk is full (IOException).
.NET Framework Security
This example creates a new file, if the file does not already exist.
If an application needs to create a file, that application needs Create access for the folder.
If the file already exists, the application needs only Write access, a lesser privilege.
Where possible, it is more secure to create the file during deployment, and only grant Read access to a single file, rather than Create access for a folder.
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