How to: Load XML from a File, String, or Stream (Visual Basic)

 

Updated: July 20, 2015

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

You can create XML Literals and populate them with the contents from an external source such as a file, a string, or a stream by using several methods. These methods are shown in the following examples.

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To load XML from a file

  • To populate an XML literal such as an XElement or XDocument object from a file, use the Load method. This method can take a file path, text stream, or XML stream as input.

    The following code example shows the use of the Load(String) method to populate an XDocument object with XML from a text file.

        Dim books = 
            XDocument.Load(My.Application.Info.DirectoryPath & 
                           "\..\..\Data\books.xml")
        Console.WriteLine(books)
    

To load XML from a string

  • To populate an XML literal such as an XElement or XDocument object from a string, you can use the Parse method.

    The following code example shows the use of the XDocument.Parse(String) method to populate an XDocument object with XML from a string.

        Dim xmlString = "<Book id=""bk102"">" & vbCrLf & 
                        "  <Author>Garcia, Debra</Author>" & vbCrLf & 
                        "  <Title>Writing Code</Title>" & vbCrLf & 
                        "  <Price>5.95</Price>" & vbCrLf & 
                        "</Book>"
        Dim xmlElem = XElement.Parse(xmlString)
        Console.WriteLine(xmlElem)
    

To load XML from a stream

The following code example shows the use of the ReadFrom method to populate an XDocument object with XML from an XML stream.

    Dim reader = 
      System.Xml.XmlReader.Create(My.Application.Info.DirectoryPath & 
                                  "\..\..\Data\books.xml")
    reader.MoveToContent()
    Dim inputXml = XDocument.ReadFrom(reader)
    Console.WriteLine(inputXml)

XDocument.Load
XElement.Load
XElement.Parse
XDocument.Parse
XNode.ReadFrom
XML Literals
XML
Manipulating XML in Visual Basic

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