XML (.NET) Interview questions :- Explain simple Walk through of XmlReader.

In this section, we will do a simple walkthrough of how to use the “XmlReader” class. Sample for the same is available in both languages (C# and VB.NET) which you can find in “WindowsApplicationXMLVBNET” and “WindowsApplicationCSharp” folders. Task is to load “TestingXML.XML” file and display its data in a message box. You can find “TestingXML.XML” file in “BIN” directory of both the folders. Below is the display of “TestingXML.XML” file and its content.

Both the projects have command button “CmdLoadXML” which has the logic to load the XML file and display the data in message box. I have pasted only the “CmdLoadXML” command button logic for simplicity. Following are the basic steps done:-

• Declared the “XMLTextReader” object and gave the XML filename to load the XML data.
• Read the “XMLTextReader” object until it has data and concatenate the data in a temporary string.
• Finally display the same in a message box.  

It holds true for C# code as shown below.

Below is a .NET video created by www.questpond.com which discusses one more important .NET interview question which talks about IL Code, JIT, CLR, CTS and CAS.