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The Solution Explorer is a window in the IDE showing all the files, directories, and physical artifacts of your project. You can use it to manage your project, adding and deleting new content or moving existing content around. The Solution Explorer window is shown in Figure 2-8.

public InputStream getPortletInputStream() throws IOException public BufferedReader getReader() throws UnsupportedEncodingException IOException

Visual Studio 2005 uses the concept of solutions for managing complex applications. Solutions are broken down into projects. If you have a single project present in your solution, as with the example so far, then the project and solution are one in the same. However, as soon as you add other projects, which may represent other web sites, related business logic code, web services, or whatever, then the solution will encompass all of those projects and compile them into a single web application. Earlier in the chapter, you created an ASP.NET web site. If you look at your project in the Solution Explorer, you can see a couple of interesting things. The first of these is a folder named App_Data. This is a special directory used by ASP.NET to manage data and data connections within your project. You ll be examining this in more detail in s 3 and 4. The next item of interest Visual Studio created for you is a file called Default.aspx. ASP .NET uses the .aspx extension to denote a web form. This is a special type of web page on which server controls may be placed, and code associated with these forms may be executed by the server. The design and code implementation are separated by means of a code-behind page. The code-behind page is typically the name of the page with a .cs extension (or .vb if you are using Visual Basic). Therefore, if your page is called Default. aspx, its associated code-behind file is called Default.aspx.cs. You can see this in action in

The preceding code first creates an instance of the XmlDocument class. It then loads the Employees.xml file by using the Load() method. Further, it checks the radio buttons to find out whether to search on the basis of first name or last name. We want to search <employee> nodes whose <firstname> or <lastname> matches the value entered in the text box. This is accomplished by calling the SelectNodes() method of the XmlDocument class. The SelectNodes() method takes the XPath string and returns an XmlNodeList containing the matching nodes. Look at the XPath syntax carefully. Because we want to select <employee> nodes, we specify //employee. But we are not interested in selecting all the <employee> nodes, so we place the filtering criterion in a pair of square brackets ([]). To represent the text value of the <firstname> and <lastname> nodes, we use the text() XPath function. The code then iterates through the XmlNodeList and adds employee IDs to a combo box. The values of the employeeid attributes are retrieved by using the Attributes collection of the XmlNode class. The user will select the employee ID whose details they want to see and will click the Show Details button. Listing 2-10 shows the code from the Click event handler of the Show Details button. Listing 2-10. Displaying Employee Details private void button2_Click(object sender, EventArgs e) { label8.Text = list[comboBox1.SelectedIndex].ChildNodes[0].InnerText; label9.Text = list[comboBox1.SelectedIndex].ChildNodes[1].InnerText; label10.Text = list[comboBox1.SelectedIndex].ChildNodes[2].InnerText; label11.Text = list[comboBox1.SelectedIndex].ChildNodes[3].InnerText; } The code simply retrieves the desired XmlNode from the XmlNodeList. The child nodes of the node are accessed by using the ChildNodes collection. The InnerText property of the XmlNode class returns the text from each child node.

Application/x-www-form-urlencoded is the default MIME type for an HTTP form that posts to a server. To avoid the IllegalStateException, and to determine whether to get a Reader or an InputStream, the portlet accesses the request body s MIME type with the getContentType() method:

public String getContentType()