C# reading element from XML file error object reference not set

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I wrote a program in C# to read settings from an XML file

XML

<?xml version="1.0" encoding="UTF-8"?>
-<settings><setting2>4</setting2><setting3> </setting3><setting4> </setting4><setting5> </setting5><setting6> </setting6><setting7> </setting7><setting8> </setting8><setting9> </setting9><setting10> </setting10><setting11> </setting11><setting12> </setting12><setting13> </setting13><setting14> </setting14><setting15> </setting15><setting16> </setting16><setting17> </setting17></settings>

Now i want to load it in program with

C#

string xmlfilename = Path.Combine(Application.StartupPath, filename);
XDocument doc = new XDocument();
 XDocument.Load(xmlfilename);
textBox1.Text + doc.Root.Element("settings").Element("setting2").Value;

But it gives error object reference not set to an instance of an object.

Posted 1-Oct-15 23:53pm

AliGharibi

Updated 2-Oct-15 1:16am

Maciej Los

v2

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Manas_Kumar · Accepted Answer · 2015-10-02T00:39:00

Solution 2

From your code, xml file was not loading to doc object and secondly you are getting error due to root element. Please try with below code:

C#

Document doc = XDocument.Load(xmlfilename);
// This is one way to fetch XML data
string temp = textBox1.Text + doc.Root.Element("setting2").Value;
// or
// Another way to fetch XML data
string temp = textBox1.Text + doc.Element("settings").Element("setting2").Value;

Posted 2-Oct-15 0:39am

Manas_Kumar

Comments

[no name] 2-Oct-15 7:12am

The first one you wrote did work well
My code was exactly the second one

Maciej Los 2-Oct-15 7:20am

5ed!

Sinisa Hajnal · Accepted Answer · 2015-10-02T00:21:00

1. Try with XmlDocument

2. Go one step at a time (XmlElement root = doc.Root; root.Element(settings) etc.) until you get which returns null

3. Instead of going .Element.Element.Element write XPath to wanted element (//settings/setting2)

Some of this should resolve the problem, play a bit with the code.

Here is complete example: Parse XML Documents by XMLDocument and XDocument[^]