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The last of our chapters on LINQ relates to the System.Data.DataSet class, which can be used to create an in-memory cache of data from a database and which can be used as the data source for LINQ queries. The DataSet class is part of ADO.NET just like the Entity Framework that we saw in the previous chapter. ADO.NET is big; it allows you to access a wide range of data sources in a wide range of ways. In this chapter, we ll be looking at working with databases more directly than with the Entity Framework. We won t be using data models or C# objects that represent tables and rows. In fact, if you have been waiting for a chance to break out your SQL skills, then this is the chapter for you. ADO.NET supports all the major databases and quite a few of the minor ones. We won t be going into the details of setting up and configuring a database, and our examples will all be based on SQL Server Express. That said, everything you learn in this chapter can be transferred to other database servers because of the way that ADO.NET provides consistent access to data and databases. Table 31-1 provides the summary for this chapter. Table 31-1. Quick Problem/Solution Reference for 31 how to barcode generator vb.net code use visual studio .net barcodes generator to connect barcodes in vb.net full BusinessRefinery.com/barcodegenerate, create bar code browser none on vb projects BusinessRefinery.com/ barcodesThe last of the generic list collection classes is SortedList<TKey, TVal>. However, oddly, this class isn t a list at all. It implements the IDictionary<TKey, TVal> interface, which we ll see more of when we get to the Generic Dictionaries section of this chapter. In fact, this class is a kind of cross-over between a list and a dictionary. The difference from List<T> is that the items are sorted as they are added. This is different from List<T> where the items are stored in the sequence they are added until the Sort method is used. The SortedList<TKey, TVal> class has six constructors, which are listed in Table 19-14. Table 19-14. Constructors for SortedList<TKey, TVal> barcoder java alkalmaz use spring framework bar code printing to display barcodes on java delivery BusinessRefinery.com/barcodeusing barcode encoder for asp .net control to generate, create barcode image in asp .net applications. bind BusinessRefinery.com/ bar codeDisable the Genius Feature
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CHAPTER 8 UNDERSTANDING PERFORMANCE OPTIMIZATION METHODS
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