Vb net updating xml file

13 Oct

To accomplish our goal, we will use an XPath expression to access the app Settings node, and then add a new element to that node.The config file is located in the Application Directory and is named config.Now we move for the update data into xml file using Windows Application. We are updating simple xml file with the user input details. For this we are creating sample windows application in visual studio 2010 using VB and updating xml of student information’s. We're a friendly computing community, bustling with knowledgeable members to help solve your tech questions.Please join our friendly community by clicking the button below - it only takes a few seconds and is totally free.First we ask to user to input the roll no from for search records from the xml file. If roll no match then it will view all the records for this student and user will update the details for given records base on roll no. Select Single Node("/Student Details/Student[@Roll No='" & txt Search Rollno.

As an example, let’s say that we use app Settings in our application and we need to add a new app Settings value in support of a new feature.Here is the XML file created in the previous lesson. Add(new XElement("Book", new XAttribute("title", "AJAX"), new XElement("author", "Khemrin"), new XElement("year", "2000"))); xml Doc. You need to query the elements that meet your criteria. Here is an example code that removes the element that has "Java" title attribute. Load("d:/data.xml"); var elements To Delete = from ele in xml Doc. By using Linq query expression, you can easily read all elements of the xml file. = null select ele; foreach (var e in elements) The Linq expression to add a new element to the xml file is similary to reading from that file. Save("d:/data.xml"); Simetimes, you might want change or udate a element of xml file. Then assign new values to their attributes or sub-elements. Represents a writer that provides a fast, non-cached, forward-only way of generating streams or files containing XML data that conforms to the W3C Extensible Markup Language (XML) 1.0 and the Namespaces in XML recommendations. SAX obviously can't process information as fast as DOM can when working with large files.