Writing a xml file in vb.net

You could change the Employee class to use properties instead of public fields. This can sometimes create more useful abstractions for object-oriented designs. Also The data inside the employee array could be acquired from another data source, such as a Windows Forms control or a database server.

The XmlWriter type introduces an abstract data type in the VB. NET language and. You could just manually print out the XML file. But this usually results in confusing code. Home Explore Tags Contribute. Home » VB. Posted in VB. Tags: Files in VB. Adding namspace Reference. NET File. Open Method In VB. NET and VB. NET using VB. NET VB. NET- String. Compare method Enumertors in VB. NET Registry. So, hidding implementation details with the XMLSerializer cannot be done completely although we get pretty close.

That is, we can use the DataContractSerializer with the IXmlSerializable interface on the modelling class to completely hide implementation details of saving and loading data via XML. Whitespace more frequently, while the XMLSerializer is happy to browse from one tag StartElement to the other, never mentioning the white spaces in-between. These details are not difficult to handle, when it has become clear where the difference in behaviour is, but it is important to carefully debug existing code when changing from one serializer to the other.

The remainder of this article reviews the details of the DataContractSerializer implementation, while the XMLSerializer implementation is covered with the attached downloads - mainly because the XMLSerializer cannot implement a hidden class model and the DataContractSerializer is a more recent class that should be considered as preference over the XMLSerializer since it offers the same features plus more advanced functions.

This requires a reference to the System. Serialization assembly and a using statement with that namespace. We also have to replace the previously stated pattern for reading and writing child items with a pattern that is specific to the DataContractSerializer:. This is all that is required towards using an XML serializer with a completely hidden data model implementation. All solutions discussed so far in this article are still naive with respect to the usage of an XML Schema Definition XSD , which is typically used to ensure that all data items match an expected consistency.

The next section evaluates that point with the DataContractSerializer to make things even more robust towards failures that usually occur in production. The XsdDataContract.

The exported XSD is not much to talk about in terms of detail and so forth but maybe this detail is useful to someone else. The project shows that the XmlReaderSettings class can contain multiple schema definitions short schemas or XSDs which in turn can be used to initialize an XmlReader. The XmlReader can then use the call back function to report any errors or warnings, if they are necessary.

This sample has extended read XML method signatures to accommodate for the additional schemas:. These schemas are handed off to the XmlReader to report back information whenever the XML does not meet the specified expectations in the TreeModel. We can verify this, if we open the TreeModel. Net framework also supports the ISerializable interface for serializing objects into a binary format.

This form of serialization was not part of this article since it is not interoperable and is very similar to the IXmlSerializable interface.