using linq to access data in c programs

Tài liệu Using XPath to Query Data in a DataSet doc

... 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...

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Module 4: Using ADO to Access XML Data

Danh mục: Hệ điều hành

... 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...

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Module 3: Using ADO.NET to Access Data

Danh mục: Chứng chỉ quốc tế

... 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,...

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Module 5: Using HTTP to Access XML Data

Danh mục: Hệ điều hành

... 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...

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Using LINQ to DataSet

Danh mục: Kỹ thuật lập trình

... 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,...

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Using LINQ to Entities

Danh mục: Kỹ thuật lập trình

... 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...

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Using LINQ to SQL

Danh mục: Kỹ thuật lập trình

... 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...

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Introduction to Design Patterns in C#

Danh mục: Kỹ thuật lập trình

... 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...

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Tài liệu Module 9: Using XML to Exchange Data pptx

Danh mục: Quản trị mạng

... 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...

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Tài liệu Pro LINQ Language Integrated Query in C# 2008 docx

Danh mục: Kỹ thuật lập trình

... collections using LINQ to Objects, XML using LINQ to XML, DataSets using LINQ to DataSet, and SQL Server databases using LINQ to SQL Rattz_789- 3C0 1.fm Page 17 Tuesday, October 2, 2007 2:29 PM C ... sample database Listing 1-3 A Simple Database Query Using LINQ to SQL using System; using System .Linq; using System .Data .Linq; using nwind; Northwind db = new Northwind(@ "Data Source=.\SQLEXPRESS;Initial ... reference to the System.Xml .Linq. dll assembly in your project and have a using directive such as the following: using System.Xml .Linq; LINQ to DataSet LINQ to DataSet is the name given to the LINQ...

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Pro LINQ Language Integrated Query in C Sharp 2008 docx

Danh mục: Kỹ thuật lập trình

... collections using LINQ to Objects, XML using LINQ to XML, DataSets using LINQ to DataSet, and SQL Server databases using LINQ to SQL Rattz_789- 3C0 1.fm Page 17 Tuesday, October 2, 2007 2:29 PM C ... sample database Listing 1-3 A Simple Database Query Using LINQ to SQL using System; using System .Linq; using System .Data .Linq; using nwind; Northwind db = new Northwind(@ "Data Source=.\SQLEXPRESS;Initial ... reference to the System.Xml .Linq. dll assembly in your project and have a using directive such as the following: using System.Xml .Linq; LINQ to DataSet LINQ to DataSet is the name given to the LINQ...

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Introduction to Design Patterns in C# doc

Danh mục: Kỹ thuật lập trình

... 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...

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Introduction to Design Patterns in C# pot

Danh mục: Kỹ thuật lập trình

... 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...

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Báo cáo khoa học: "Using Emoticons to reduce Dependency in Machine Learning Techniques for Sentiment Classiﬁcation" pot

Danh mục: Báo cáo khoa học

... 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...

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Pitt francis, whiteley - guide to scientific computing in c++

Danh mục: Kỹ thuật lập trình

... 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...

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A Programmer’s Guide to ADO.NET in C# potx

Danh mục: Kỹ thuật lập trình

... Understanding Data Connections To connect to a data source, the ﬁrst thing you need to learn about is a data connection Each data provider has a connection class, and if you’re using VS NET, you can ... respectively See the following: • SqlConnection creates and manages SQL Server database connections • OdbcConnection creates and manages connections to ODBC data sources • OleDbConnection creates ... manages connections to an OLE-DB data sources In VS NET, you can create a connection component in many ways You can use the IDE to add a connection object to a project, create it programmatically,...

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An Introduction to Design Patterns in C++ with Qt™, 2nd Edition doc

Danh mục: Kỹ thuật lập trình

... 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...

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Using LINQ to SQL_1 potx

Danh mục: Hệ điều hành

... thấy c u lệnh mà LINQ to SQL th c thi th c sự, th c tốt Gắn nối c u truy vấn LINQ to SQL vào control LINQ to SQL C c câu truy vấn LINQ trả kết mà implement interrface IEnumerable – interface mà control ... theo CategoryName thay CategoryID c ch viết c u lệnh LINQ sau: Chú ý c ch dùng thu c tính “Category” đối tượng Product để l c theo CategoryName Category chứa Product Thu c tính tự động tạo LINQ to ... liệu từ CSDL c ch dùng lớp NorthwindDataContext LINQ to SQL sau tự động diễn dịch biểu th c thành c u lệnh SQL thích hợp để th c thi Ví dụ, viết biểu th c LINQ để lấy đối tượng Product đơn c ch tìm...

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Using LINQ to SQL_2 pot

Danh mục: Hệ điều hành

... vi c tr c tiếp với mô hình liệu LINQ to SQL muốn, hay ngữ c nh mà không phù hợp để dùng C c phần mô tả bư c tạo nên ứng dụng web nói c ch dùng LINQ to SQL ... sau chọn “New Data Source…” bên dang sách “Choose Data Source:”: Một hộp thoại lên, c danh sách loại datasource, chọn LINQ hộp thoại đặt cho control mà bạn muốn tạo: 50 LINQ ... trình cung c p LINQ (LINQ provider: LINQ to SQL, LINQ to Object…) Bạn không c n định nghĩa phương th c query/insert/update/delete cho nguồn liệu để gọi, thay vào bạn trỏ đến...

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Using LINQ to SQL_3 pot

Danh mục: Hệ điều hành

... gọi SPROC dùng LINQ to SQL Trong phần 2, nói c ch dùng LINQ to SQL designer để tạo mô hình liệu LINQ to SQL đây: 66 LINQ to SQL Tutorial Ở c a sổ c chứa c a sổ con, c a sổ bên trái cho phép ... hợp chúng với CHúng ta viết đoạn lệnh để làm tất điều transaction LINQ to SQL đảm bảo thủ t c kiểm tra th c thi cho phép trư c liệu c p nhật c ch th c sự: VB: 81 LINQ to SQL Tutorial C# : LINQ to ... th c thi hàm UDF chạy: 76 LINQ to SQL Tutorial Tổng kết LINQ to SQL supports the ability to call Stored Procedures and UDFs within the database and nicely integrate them into our data model In...

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