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4. Open Excel. 5. Select a cell and paste the data. 6. Before you deselect the pasted range, click the Paste Options button to open the options menu (see Figure 8-1).

SELECT notes FROM employees Although the SELECT command listed here does not explicitly return XML data, you can run it through the ExecuteXmlReader method, as shown here: string nwind = "DATABASE=xmlnet;SERVER=localhost;UID=sa;"; string query = "SELECT notes FROM employees"; SqlConnection conn = new SqlConnection(nwind); SqlCommand cmd = new SqlCommand(query, conn); connOpen(); XmlTextReader reader = (XmlTextReader) cmdExecuteXmlReader(); ProcessNotes(reader); readerClose(); connClose(); 298.

The XML reader will loop through the nodes, moving from one record to the next, as shown here: void ProcessNotes(XmlTextReader reader) { try { while(readerRead()) { if (readerNodeType == XmlNodeTypeText) MessageBoxShow(readerValue); } } catch {} finally { MessageBoxShow("Closed.."); } } The connection remains open until the reader is closed Next store the results in a string variable and use that string to create a new XmlTextReader object (See 2) This technique gives you an extra advantage: you can work with the reader while you are disconnected from the database An XML Reader for Data Readers An XML reader can work on top of different data containers, including streams, files, and text readers By writing a custom XML reader, you can also navigate non-XML data using the same XML reader metaphor.

7. To create a static web query with hyperlinks, choose Keep Source Formatting (see Figure 8-2).

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In this case, you create a virtual XML tree and make the underlying data look like XML (In 2, you learned how to visit CSV files the XML way) The ability to expose result sets via XML is specific to SQL Server 2000 and potentially to any other native managed provider for DBMS systems with full support for XML queries You can't, for example, use the ExecuteXmlReader method with an object of class OleDbCommand Recall from the section "Under the Hood of ExecuteXmlReader," on page 366, the internal structure of ExecuteXmlReader The ExecuteXmlReader method simply creates an XML text reader based on the internal stream used to carry data back and forth What about creating a custom XML reader by building a virtual XML tree around the provider-specific data reader In this way, you could easily extend any NET Framework data provider by using the ExecuteXmlReader method.

You should add page numbers to your business proposal. Footers are ideal for listing page numbers and any additional information. Page numbers in the footer ensure that the business proposal can be reordered easily, should someone separate the pages. You should not number the cover page. However, if the table of contents runs over one page, you may want to number it. To number the table of contents, place your cursor at the top of the first page. Click View Header and Footer. Click the Page Setup button on the Header and Footer toolbar to bring up the Page Setup dialog box shown in Figure 8-42. Use the controls to specify the distance from the edge of the paper. In the Preview section, select This point forward. Click OK. Scroll down and click within the footer box. On the Formatting toolbar, click the Right Alignment button. Then on the Header and Footer toolbar, click the Insert Page Number button. Click the Format Page Number button. In the Page Number Format box, shown in Figure 8-43, select the number format. For a table of contents, use lowercase Roman numerals. Under Page numbering, select Start at and use the controls to select i. Click OK.

This method is not as effective as using the internal stream, but it does work and can be applied to all data providers Building the XML Data Reader Let's rework the CSV reader example from 2 and build an XmlDataReader class inheriting from XmlReader, as follows: public class XmlDataReader : XmlReader { 299.

8. To remove the hyperlinks, choose Match Destination Formatting (see Figure 8-3).

... } The base class is for the most part abstract, thus requiring you to override several methods and properties When designing an XML reader, a key step is defining the XML virtual tree that underlying data will populate In this case, we'll try for a relatively simple XML schema that closely resembles the schema of the FOR XML RAW mode, as shown here: <row field1=".." field2=".." .. /> <row field1=".." field2=".." .. /> .. The XmlDataReader class features only one constructor, which takes any object that implements the IDataReader interface The programming interface of a data reader object like OleDbDataReader and SqlDataReader consists of two distinct groups of functions: the IDataReader and IDataRecord interfaces The former includes basic methods such as Read, Close, and GetSchemaTable The latter contains specific reading methods including GetName, GetValue, and the Item indexer property.

Note In Figure 8-3, column A is empty. The list view included a column for attachments, which the web

By making the constructor accept a reference to the IDataReader interface, you enable the XmlDataReader class to support any data reader object Internally, the class defines the following private properties: protected IDataReader m_dataReader; protected IDataRecord m_dataRecord; protected ReadState m_readState; protected int m_currentAttributeIndex; The idea is to map the reading methods of the XmlDataReader class to the data reader object and use the m_currentAttributeIndex member to track down the currently selected attribute, as shown in the following code Of course, each XML attribute corresponds to a column in the underlying result set public XmlDataReader(IDataReader dr) { m_dataReader = dr; m_readState = ReadStateInitial; m_dataRecord = (IDataRecord) dr; m_currentAttributeIndex = -1; } Notice that the same object is passed as a reference to IDataReader but can also be cast to IDataRecord.

This is possible as long as the real object implements both interfaces, but for data reader objects this is true by design The XmlDataReader Implementation Let's review the implementation of a few properties and methods to grasp the essence of the reader, as shown in the following code The entire source code is available for download in this book's sample files // Return the number of attributes (for example, the field count) 300.

To add page numbers to the remainder of the business proposal, place your cursor at the top of the first page. Click View Header and Footer. Click the Page Setup button on the Header and Footer toolbar. Use the controls to specify the distance from the edge of the paper. In the Preview section, select This point forward. Click OK. Scroll down and click within the footer box. On the Formatting toolbar, click the Right Alignment button. Then on the Header and Footer toolbar, click the Insert Page Number button. Click the Format Page Number button. In the Page Number Format box, select the number format. You should select standard numbering. Under Page numbering, select Start at and use the controls to select the appropriate page number. Click OK.

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