Reading & Writing XML Files

Reading & Writing XML Files

To read xml files, we can use the XmlReader class. We will use the XML file we created earlier to assign the values into variables. Note that we will simply use variables for storing the values from the XML. A better approach is by creating a Products class the follows the heirarchy of the XML file. The following program demonstrates the use of XmlReader class.

using System; using System.Xml; public class Program

{

public static void Main()

{

XmlReader reader = XmlReader.Create("Products.xml"); while (reader.Read())

{

if (reader.NodeType == XmlNodeType.Element && reader.Name == "Product")

{

Console.WriteLine("ID = " + reader.GetAttribute(0)); Console.WriteLine("Name = " + reader.GetAttribute(1)); while (reader.NodeType != XmlNodeType.EndElement)

{

reader.Read();

if (reader.Name == "Price")

{

while (reader.NodeType != XmlNodeType.EndElement)

{

reader.Read();

if (reader.NodeType == XmlNodeType.Text)

{

Console.WriteLine("Price = {0:C}", Double.Parse(reader.Value));

}

}

reader.Read(); } //end if

if (reader.Name == "OtherDetails")

{

while (reader.NodeType != XmlNodeType.EndElement)

{

reader.Read();

if (reader.Name == "BrandName")

{

while (reader.NodeType != XmlNodeType.EndElement)

{

reader.Read();

if (reader.NodeType == XmlNodeType.Text)

{

Console.WriteLine("Brand Name = " + reader.Value);

}

}

reader.Read(); } //end if

if (reader.Name == "Manufacturer")

{

while (reader.NodeType != XmlNodeType.EndElement)

{

reader.Read();

if (reader.NodeType == XmlNodeType.Text)

{

Console.WriteLine("Manufacturer = " + reader.Value);

}

}

} //end if

}

} //end if

} //end while } //end if

} //end while

}

}

Output:

ID = 001

Name = Soap

Price = $10.00

Brand Name = X Soap

Manufacturer = X Company