using linq to access data in c programs

... services can be used to access the XmlDataDocument to perform certain functionality more conveniently than could be accomplished using the DataSet directly To execute an XPath query against the contents ... in SQL Server Books Online under the topics "Guidelines for Using XPath Queries" and "Using XPath Queries." In NET, the DataSet is synchronized with the XmlDataDocument As a result, in some cases ... DataSet("Orders_OrderDetails"); SqlDataAdapter da; // Fill the Order table and add it to the DataSet da = new SqlDataAdapter("SELECT * FROM Orders", ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable...

Ngày tải lên: 26/01/2014, 10:20

... ADO to Access XML Data Retrieving XML Data with ADO Topic Objective To introduce the topics in this section Lead -in ADO is the preferred data access technology for many developers Using ADO to ... Execute the command Call the Execute method on the Command object, and process the results Module 4: Using ADO to Access XML Data Using a Command Object Topic Objective To describe how to create ... 4: Using ADO to Access XML Data 25 Using the Output Encoding Property Topic Objective To explain how the encoding of the result stream can be controlled Lead -in You can set the encoding used in...

Ngày tải lên: 22/10/2013, 16:15

... Connecting to a Data Source Topic Objective To describe how to connect to a data source by using ADO.NET Lead -in Connecting to a data source is the first step in data access ! Using SQLConnection ... ADO.NET to Access Data 37 # Accessing Data with DataReaders Topic Objective To introduce the topics in this section Lead -in Another method of accessing data from a data source is to use DataReaders ... Module 3: Using ADO.NET to Access Data Practice: Viewing a DataSet Topic Objective To introduce the practice Lead -in In this practice, you will connect to the conference database, retrieve a DataSet,...

Ngày tải lên: 27/10/2013, 07:15

... 2 Module 5: Using HTTP to Access XML Data Enabling HTTP Access to SQL Databases Topic Objective To introduce the topics in this section Lead -in In this section, you will see how to use an IIS ... programmatically by using the Microsoft XML components Module 5: Using HTTP to Access XML Data 37 Publishing a Database Object Topic Objective To introduce the topics in this section Lead -in Binary ... and caching options 8 Module 5: Using HTTP to Access XML Data Securing a SQL Server Virtual Directory Topic Objective To describe how to secure a SQL Server virtual directory Clients Internet Information...

Ngày tải lên: 04/11/2013, 13:15

... alternatives to LINQ to DataSet LINQ to Entities, discussed in Chapter 19, Using LINQ to Entities,” can process external data without the need to load full tables into memory Querying with LINQ to DataSet: ... with LINQ to DataSet With the exception of the new enumerated methods specific to LINQ to DataSet, using ADO.NET DataTable objects in LINQ queries is identical to using standard collection objects ... provider includes “DataSet” in its name, the focus in LINQ queries is on the DataTable class LINQ to DataSet does not consider a DataTable instance’s presence in an overall DataSet to be significant,...

Ngày tải lên: 03/10/2013, 00:20

... other LINQ providers can be mixed—Chapter 18, Using LINQ to DataSet,” combined LINQ to Objects and LINQ to DataSet content LINQ to Entities imposes restrictions on the type of data involved in ... within a custom function and using the preceding steps to enable LINQ to call the custom functionality 326 Microsoft ADO.NET Step by Step Calling Custom Database Functions: C# Note  This exercise ... and inaccessible to LINQ during compilation, this local definition provides LINQ with a valid function to call and enables full IntelliSense during LINQ query development You don’t need to include...

Ngày tải lên: 03/10/2013, 00:20

... defined context, using it with LINQ is a simple matter of creating an instance of the context and adding its exposed members to a query Chapter 20  Using LINQ to SQL 335 C# using (SalesOrderLink context ... SalesOrderLink(connectionString) Dim results = From cu In context.Customers Order By cu.FullName Select CustomerID = cu.ID, CustomerName = cu.FullName End Using Except for the replacement of an ObjectContext ... Using Custom Database Functions in Queries Although custom functions defined within a NET application cannot participate directly in a LINQ to SQL query, these same queries can easily access functions...

Ngày tải lên: 03/10/2013, 00:20

... individual characters by enclosing them in single quotes: char c = ‘q’; C# follows the C convention that the white space characters (non printing characters that cause the printing position to ... original introduction of this statement into the C language was, like the post- increment operators, to give hints to the compiler to allow it to produce more efficient code, and to reduce typing ... 150 An Investment Tracker 151 The Stock Factory 154 The CheckChoice Class 155 The ListboxChoice Class 156 Using the Items Collection in the ListBox Control...

Ngày tải lên: 18/10/2013, 17:15

... this collection allows you to process each direct descendant Using an index into the childNodes collection (as shown previously) allows you to access each child If you have a reference to a DOM ... project Click the Create XML Document button Execution will halt at the breakpoint in cmdCreateXMLDoc_Click Explain that the line with the breakpoint instantiates an MSXML.DOMDocument object, which ... All characters inside a comment are ignored until the closing > is encountered Comments can occur anywhere in an XML document It is a good practice to insert comments in XML documents or code...

Ngày tải lên: 21/12/2013, 19:15

... Domain dependency in sentiment classification Figure 1: Topic dependency in sentiment classification Ac- Accuracies, in percent Best performance on a test set for each model is highlighted in bold ... Performance of Emoticon-trained classifier across Figure 7: Performance of Emoticon-trained classifier across topics Mean accuracies with standard deviation, in percent time-periods Mean accuracies ... sets) as optimising training data For each set of training data we extracted a context of an increasing number of tokens (from 10 to 1,000 in increments of 10) both before and in a window4 around...

Ngày tải lên: 17/03/2014, 06:20

... demonstrate how to declare a string, how to determine the length of a string, how to access individual characters of the string, and how to print a string to the console A string in C+ + is a little ... Scienti c Programs in C+ + Since you have selected a book with the words C+ +” and “Scienti c Computing” in the title, then the chances are that you have decided to start writing your scienti c ... Undergraduate Topics in Computer Science Undergraduate Topics in Computer Science (UTiCS) delivers high-quality instructional content for undergraduates studying in all areas of computing and information...

Ngày tải lên: 19/03/2014, 14:12

... you can compile and run this program using the ubiquitous GNU C compiler, gcc The command to compile a C+ + program is g++, which is a program that calls gcc, treats c and h files as C+ + source ... 12 Chapter C+ + Introduction function Example 1.3 shows how to extract the code for computing factorials and transform it into a reusable function EXAMPLE 1.3 src/early-examples/fac2.cpp #include ... just before the compiler compiles your code In this example, http://www.gnu.org/software/gcc/onlinedocs/ Discussed in Section C. 2 www.it-ebooks.info Chapter C+ + Introduction the included header...

Ngày tải lên: 24/03/2014, 01:21