Question

# Compare two Xml_ file in C# and extract the difference between them in other xml_file

Hi!

I have problem about xml_file, I need to compare between two xml_file with deferent values and I must extract the deference in a new xml file in C#, .Net, I need to write program(not Microsoft XmlDiff and Patch tools). If you can help me please!

Thank you!

Original file is the first one!

<root>

<data name="senChangePassword" xml:space="preserve">

<value>Hi</value>

<comment> Jessica</comment>

</data>

<data name="senChangesWereSuccessfullySaved" xml:space="preserve">

<value>save change.</value>

<comment> Jessica</comment>

</data>

<data name="senChangeUserSettings" xml:space="preserve">

<value>change data</value>

<comment> Jessica</comment>

</data>

<data name="senCompareWith" xml:space="preserve">

<value>Compare</value>

<comment>Jessica</comment>

</data>

<data name="senPasswordResetMailText" xml:space="preserve">

<value>Here projectportal.&lt;br/&gt;&lt;br/&gt;[password]&lt;br/&gt;&lt;br/&gt;go to projectportal: [link]&lt;br/&gt;&lt;br/&gt;Thankyou&lt;br/&gt;&lt;/br&gt;[manager]</value>

<comment>09-2019</comment>

</data>

<data name="senCreatedQuestions" xml:space="preserve">

<value>Save</value>

<comment>Jessica</comment>

</data>

</root>

===========================================

The second xlm_file

<?xml version="1.0" encoding="UTF-8" ?>

<root>

<data name="senChangePassword" xml:space="preserve">

<value>Change Password</value>

<comment> Jessica</comment>

</data>

<data name="senChangeUserSettings" xml:space="preserve">

<value>Change data</value>

<comment>Jessica</comment>

</data>

<data name="senCompareWith" xml:space="preserve">

<value>Compare</value>

<comment> Jessica</comment>

</data>

<data name="senPasswordResetMailText" xml:space="preserve">

<value>Here you get a new password for the project portal.&lt;br/&gt;&lt;br/&gt;[password]&lt;br/&gt;&lt;br/&gt;Follow this link to the project portal: [link]&lt;br/&gt;&lt;br/&gt;Sincerely&lt;br/&gt;&lt;/br&gt;[manager]</value>

<comment> 09-2019</comment>

</data>

<data name="senCreatedQuestions" xml:space="preserve">

<value>Created questions</value>

<comment> Jessica</comment>

</data>

</root>

======================================================

Answer 1

You can use the following code to compare two XML files and write the difference in new XML file which is as follow :

public void CompareXmlFile(string file1, string file2, string diffFileNameWithPath)
        {

            XmlReader reader1 = XmlReader.Create(new StringReader(file1));
            XmlReader reader2 = XmlReader.Create(new StringReader(file2));

            StringBuilder differenceStringBuilder = new StringBuilder();

            using (FileStream fs = new FileStream(diffFileNameWithPath, FileMode.Create))
            {
                XmlWriter diffGramWriter = XmlWriter.Create(fs);

                XmlDiff xmldiff = new XmlDiff(XmlDiffOptions.IgnoreChildOrder |
                                        XmlDiffOptions.IgnoreNamespaces |
                                        XmlDiffOptions.IgnorePrefixes);
                bool bIdentical = xmldiff.Compare(file1, file2, false, diffGramWriter);

                diffGramWriter.Close();
            }
        }  

Calling Code:

CompareXmlFile(@"C:\XML\Source.xml", @"C:\XML\changed.xml", @"C:\Diff.xml");

Hope this will help you.