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Notice that in the code, the display mode is set by using the SupportedDisplayModes collection. Also notice that in this case, the display mode is being set inside the ViewState (in PageLoad) and then passed to the page. Of course, there are other display modes, as defined in Table 5-1. This lesson s practice will walk you through the creation of a page that allows a user to switch between the various display modes.

Understand Microsoft Visual Studio support for deploying Web Applications . Create a deployment package using Visual Studio .

{ // Url is a form property that points to the DiffGram file object o1=null, o2=null, o3=null, o4=null; WebBrowserNavigate(Url, ref o1, ref o2, ref o3, ref o4); } A DiffGram has no trace of relationships between tables unless the Nested property of the DataRelation object is set to true This system is reasonable in light of what we saw in 9 ADONET serializes information about tables relationships using XML Schema constructs Because a DiffGram does not include schemas, it can't contain static information about table relationships When the Nested property is set to true, the parent/child relationship is expressed by grouping child rows as a subtree of the parent row Persisting a DataSet Object to a DiffGram A DiffGram is programmatically created by calling the WriteXml method of the DataSet class.

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Neither of these solutions provides the necessary scalability, in terms of cost, flexi ble administration, and demand for connections. Therefore, it makes sense to replace the modem pools and private network infrastructure with a less expensive solution based on Internet technology so that the business can focus on its core competencies. With an Internet solution, a few Internet connections through Internet service providers (ISPs) and VPN server computers can serve the remote networking needs of hundreds or thousands of remote clients and branch offices.

private void doStop(object sender, MouseButtonEventArgs e) { vid.Stop(); }

To save data to a DiffGram, however, you must explicitly set the XmlWriteMode argument of the method to the flag XmlWriteModeDiffGram, as shown in the following code The XML data created in this way does not include schema information We'll return to this important point in the section "Schema Information in the DiffGram," on page 461 // Prepare the output stream StreamWriter sw = new StreamWriter(fileName); XmlTextWriter writer = new XmlTextWriter(sw); writerFormatting = FormattingIndented; // Create the diffgram dsWriteXml(writer, XmlWriteModeDiffGram); writerClose(); The DiffGram contains all the rows from all the tables found in the DataSet object You can create ad hoc subsets of the DataSet object to narrow the information being saved In particular, you can use the DataSet object's GetChanges method to save only those rows that contain uncommitted changes, as shown here: DataSet dsChanges = dsGetChanges(); dsChangesWriteXml(writer, XmlWriteMode.

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DiffGram); The GetChanges method also has a few overloads that let you control the type of changes you are interested in For example, the following code prepares a DiffGram containing only the rows that have been inserted: DataSet dsChanges = dsGetChanges(DataRowStateAdded); dsChangesWriteXml(writer, XmlWriteModeDiffGram); Loading a DataSet Object from a DiffGram When you try to build a DataSet object from an XML DiffGram, you must first ensure that the target DataSet object has a schema that is compatible with the data in the DiffGram 374.

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INSERT INTO dbo.T1 SELECT 1, 'A' WHERE 1 = 0;

Java and .NET implement reflection in slightly different ways, but the basic principles will be familiar to the experienced Java developer. The differences that do exist reflect the differences between the platforms, including the .NET use of assemblies and the modifiers that can be applied to parameters.

<x:LastName>Esposito</x:LastName> <d:Position>CEO</d:Position> <d:Territories> <d:int>1</d:int> <d:int>2</d:int> <d:int>3</d:int> </d:Territories> </Employee> Classes that must be serialized to XML can't use most of the more common collection classes For example, the ArrayList class is serializable, but NameValueCollection, Hashtable, and ListDictionary are not The reason lies in the extra constraints set for the classes that implement ICollection and IEnumerable In particular, a class that implements IEnumerable must also implement a public Add method that takes a single parameter This condition filters out dictionaries and hash tables but keeps ArrayList and StringCollection objects on board In addition, the type of the argument you pass to Add must be polymorphic with the type returned by the Current property of the underlying enumerator object A class that implements the ICollection interface can't be serialized if it does not have an integer indexer that is, a public Item indexed property that accepts integer indexes.

Public Function GetArticle(ByRef ArticleDate As String, _ ByVal Author As String, ByVal UserName As String, _ ByVal Password As String) As String Dim cn As SqlConnection Dim cmd As SqlCommand Dim dr As SqlDataReader Dim userDr As SqlDataReader Dim dt As Date

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