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private void listBox1_SelectedIndexChanged(object sender, EventArgs e) { textBox2.Text = list[listBox1.SelectedIndex].InnerXml; } The code declares a variable of type XmlNodeList at the form level. This variable needs to be declared at the form level because we need to access it in two event handlers. In the Click event handler of the Search button, an XmlDocument instance is created. The Employees.xml file is loaded into it by using its Load() method. The code then calls the GetElementByTagName() method of the XmlDocument object, which accepts the tag name to look for. In our application, the tag is specified in textBox1. As mentioned earlier, the return value of the GetElementByTagName() method is of type XmlNodeList. The XmlNodeList class stores the collection of XmlNode objects. The code then iterates through the returned XmlNodeList and adds each node name into the list box. The user can select any of the nodes displayed in the list box. In order to show the contents of the selected node, the code handles the SelectedIndexChanged event of the list box. Inside the SelectedIndexChanged event handler, the selected node is retrieved from the XmlNodeList we stored previously. The contents of the selected node are displayed by using the InnerXml property of the XmlNode class, which returns all the XML content that is inside the node under consideration. To see how the application works, run it from the Visual Studio IDE. Enter firstname in the search text box and click the Search button. The list box should display three firstname entries. This is expected because our XML document contains three <employee> nodes, each having a <firstname> child element of its own. Click on any of the firstname entries from the list box. The text box beside the list box should show the value of the firstname node.

dataCommand.CommandText = commandText.ToString(); OdbcDataReader dataReader = dataCommand.ExecuteReader(); while (dataReader.Read()) { Product product = new Product(); product.ProductID = dataReader.GetInt32(0); product.ProductName = dataReader.GetString(1); product.CategoryID = dataReader.GetInt32(3); product.Price = dataReader.GetDecimal(5); product.Quantity = dataReader.GetInt16(6); products.Add(product); } dataConnection.Close(); } catch(Exception e) { Console.WriteLine("Error: " + e.Message); } return products; } } } Next, create the Product.cs class shown in Listing 13-23 in the BusinessLayer project. Listing 13-23. Product.cs File #region Using directives using System; using System.Collections.Generic; using System.Text; #endregion namespace BusinessLayer { public class Product { private int productID; private int categoryID; private string productName; private decimal price; private int quantity;

Many of the version control features for CVS and Subversion are nearly identical in NetBeans. The Update, Commit, Diff, and Search History tools function the same, have the same look and feel, and contain the same information. Here, we ll cover some of the areas where the two version control tools differ.

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Often our XML elements have an attribute that is unique for each instance of that element in the XML document. We may want to look for a specific element based on this attribute value. This process is analogous to looking for a record in a database based on its primary key. The difference, however, is that the XmlDocument class does not know automatically that a specific attribute is acting as a primary key for that element. Formally such an attribute is called the ID of that element. To convey this information, you must use a DTD or schema. Both of these techniques can mark an attribute as the ID of the element, and the XmlDocument class can then understand them as IDs. After you have a DTD or schema attached to your XML document, you can call the GetElementById() method of the XmlDocument class. The GetElementById() method accepts the ID of the element to search for and returns that element as an instance of the XmlElement class. You can then access the sub-elements or text inside this element. To illustrate the use of the GetElementById() method, we will build an application as shown in Figure 2-5.

When you choose Subversion Checkout, the Subversion Checkout wizard starts. The first step to check out code is to specify the protocol. The Subversion module allows you to check out code using several protocols: File, HTTP, HTTPS, SVN, and SVN+SSH. To check out the Subversion project code, use the URL http://svn.collab.net/repos/ svn/trunk, as shown in Figure 13-17. After you enter the URL, you can optionally enter a username or password if you have one assigned, or leave the fields blank for anonymous access. Click the Next button to move to the Folders to Checkout window.

To create a custom implementation of XmlWriter, you need to inherit from it and override the properties and methods shown in Listing A-6.

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