select distinct rows from datatable using linq in c
Copying Rows from One DataTable to Another
... to copy DataRow objects from one DataTable to another. Three techniques for selecting records to copy are demonstrated in the following example: ã Use the Rows property to access rows in ... source DataTable containing the Orders table from Northwind. A second empty target DataTable is created with the same schema. One of the three techniques, as specified by the user, is used to copy ... } } else if (selectRadioButton.Checked) { // Copy using result of Select( ) method. foreach(DataRow row in dt .Select( ORDERID_FIELD + " <= 10300")) { dtCopy.ImportRow(row);...
Ngày tải lên: 28/10/2013, 18:15
Tài liệu Using Stored Procedures to Add, Modify, and Remove Rows from the Database phần 1 pdf
... following example creates a SqlCommand object containing a SELECT statement and sets the SelectCommand property of a SqlDataAdapter to that SqlCommand: SqlCommand mySelectCommand = mySqlConnection.CreateCommand(); ... steps as shown in the earlier section, "Modifying Rows in a DataTable ." Note You'll find a complete program named PushChangesUsingProcedures.cs in the ch11 directory that illustrates ... "Modifying Rows in a DataTable ," you need to create a DataAdapter object and set its SelectCommand, InsertCommand, UpdateCommand, and DeleteCommand properties with appropriate Command objects....
Ngày tải lên: 14/12/2013, 13:15
Tài liệu Using Stored Procedures to Add, Modify, and Remove Rows from the Database phần 2 doc
... AddProduct4() stored procedure: SqlCommand myInsertCommand = mySqlConnection.CreateCommand(); myInsertCommand.CommandText = "EXECUTE @MyProductID = AddProduct4 @MyProductName, @MyUnitPrice"; ... the rows retrieved by the following SELECT statement set earlier in the SelectCommand property of mySqlDataAdapter: SELECT ProductID, ProductName, UnitPrice FROM Products ORDER BY ProductID ... database Console.WriteLine("Calling mySqlDataAdapter.Update()"); mySqlConnection.Open(); int numOfRows = mySqlDataAdapter.Update(myDataTable); mySqlConnection.Close(); Console.WriteLine("numOfRows...
Ngày tải lên: 14/12/2013, 13:15
estimation of uncertainty in predicting ground level concentrations from direct source releases in an urban area using
Ngày tải lên: 27/07/2014, 23:24
Environmental regulation and economic competitiveness: Evidence from the textile industry in Vietnam
Ngày tải lên: 24/08/2013, 18:48
Evaluation of Nutrient Loads from a Citrus Orchard in Japan
... 8). TP concentrations in the period of increasing of water discharge differed greatly from those in the period of their decreasing. During a rainfall event, the SS concentrations increase by ... which we lacked continuous data. However the continuous water discharge data calculated from the automatically measured water levels were used for Case 2. The water discharge calculations of Case ... 2000). In the washout type, nutrient concentration increases in direct proportion to water discharge as a result of eluviation; in the dilution type, the concentration increases in inverse...
Ngày tải lên: 05/09/2013, 10:15
Tiết dạy chuyên đề " Using games in English class"
... Bingo”. Activities in free time -Have a picnic -Fly the kites -Play soccer -Play badminton -Play tennis -Go swimming -Go jogging -Go camping -Go to the zoo -Go fishing What’s the weather like in the Spring ... swimming. He plays soccer. He goes jogging. He goes fishing. Hot Cold Warm Cool * Labeling pictures : What does Ba usually do when It’s hot/cold/cool/warm? When it’s hot, Ba goes swimming. When ... questions ,using given picture : Go swimming Back What’s the weather like in the Fall ? Answer the questions ,using given picture : Back What’s the weather like in the Winter ? Answer...
Ngày tải lên: 29/09/2013, 14:10
Using LINQ to DataSet
... bringing ADO.NET data into a LINQ query. Dwonloaded from: iDATA.ws Chapter 18 Using LINQ to DataSet 313 Chapter 18 Quick Reference To Do This Include a DataTable instance in a LINQ query Call ... disparate sources. You can mix LINQ to Objects and LINQ to DataSet content in the same query simply by including each source in the From clause. C# // Build an ad hoc collection, although you could ... 18 Using LINQ to DataSet 307 C# // Explicit join. var results = from cu in Customer.AsEnumerable() join ord in Order.AsEnumerable() on cu.ID equals ord.CustomerID select // Implicit join var...
Ngày tải lên: 03/10/2013, 00:20
Using LINQ to Entities
... Basic Using context As New SalesOrderEntities(connectionString) Dim results = From cu In context.Customers Order By cu.FullName Select CustomerID = cu.ID, CustomerName = cu.FullName End Using Most ... equivalents. String functions Various string and string-conversion functions from SQL Server can be called from LINQ: Ascii, Char, CharIndex, Difference (a Soundex-related function), IsDate, IsNumeric, NChar, ... EntityFunctions class name. C# var result = from cu in context.Customers where EntityFunctions.Left(cu.FullName, 1) == "A" select cu; Visual Basic Dim result = From cu In context.Customers ...
Ngày tải lên: 03/10/2013, 00:20
Using LINQ to SQL
... Chapter 20 Using LINQ to SQL 335 C# using (SalesOrderLink context = new SalesOrderLink(connectionString)) { var results = from cu in context.Customers orderby cu.FullName select new { CustomerID ... CustomerID = cu.ID, CustomerName = cu.FullName }; } Visual Basic Using context As New SalesOrderLink(connectionString) Dim results = From cu In context.Customers Order By cu.FullName Select CustomerID ... context.AgedInvoices(whichCustomer, 90); Visual Basic Dim pending As Decimal = context.AgedInvoices(whichCustomer, 90) Dwonloaded from: iDATA.ws Chapter 20 Using LINQ to SQL 343 Summary This chapter introduced...
Ngày tải lên: 03/10/2013, 00:20
Module 5: Using Trace in ASP.NET Pages
... application-level trace works. Topic Objective To introduce the topics in this section. Lead -in In this section, you will learn about application-level trace. Module 5: Using Trace in ... by introducing an automatic tracing mechanism. This tracing mechanism can be enabled and disabled either on a page-by-page basis, or for an entire application, and can be configured in the config.web ... Trace.IsEnabled strTrace = "create a trace string here" End If Trace.Write(strTrace) Sorting Trace Messages The TraceContext class contains the TraceMode property that defines...
Ngày tải lên: 05/11/2013, 12:15
A cross cultural study of using hedges in refusing a request in english and vietnamese
Ngày tải lên: 14/12/2013, 00:41
Language games using homophones in english classes=trò chơi ngôn ngữ sử dụng từ đồng âm trong các lớp học tiếng anh
Ngày tải lên: 19/12/2013, 15:01
Tài liệu Using ActionScript in Flash-P1 doc
... Flash, clicking in the left margin selected a line of code. The new way to select a line of code is to Control-click (Windows) or Command-click (Macintosh). Normal and expert modes no longer in Actions ... and scorePlayer2_mc . The following code sets a variable called score inside each movie clip instance by using instance names: this.scorePlayer1_mc.score = 0; this.scorePlayer2_mc.score = ... System.security.allowInsecureDomain or LocalConnection.allowInsecureDomain in the called file, using exact domain-name matching, as shown in the code examples earlier in this section. This statement...
Ngày tải lên: 24/12/2013, 01:17
Tài liệu Using ActionScript in Flash-P2 docx
... Using code hints” on page 147. Using comments to trigger code hints You can also use ActionScript comments to specify an object’s class for code hinting. The following example tells ActionScript ... right of the tab. ã Right-click (Windows) or Control-click (Macintosh) on a tab, and select Close Script or Close All Scripts. ã Select Close Script or Close All Scripts from the Options pop-up ... the pointer focused in the Script pane, press Control+-(minus sign) in Windows or Command+- on Macintosh. 130 Chapter 3: Using Best Practices Creating accessible sites Flash Player uses Microsoft...
Ngày tải lên: 24/12/2013, 01:17
Tài liệu Using ActionScript in Flash-P3 pdf
... Finance Edwin 46 Marketing Creating movie clips at runtime 211 Creating movie clips at runtime Not only can you create movie clip instances in the Flash authoring environment, you can also create ... Using the XMLSocket class” on page 284 and “XMLSocket class” in Flash ActionScript Language Reference. Class Description CustomActions The CustomActions class lets you manage any custom actions ... page 23 and Chapter 3, Using Best Practices,” on page 65. Principles of object-oriented programming This section provides a brief introduction to principles involved in developing object-oriented...
Ngày tải lên: 24/12/2013, 01:17
Tài liệu Using ActionScript in Flash-P4 pdf
... a custom class using a function, you can invoke call() and apply() for the function. Invoking a function using the Function.call() method in ActionScript 1 The Function.call() method invokes ... functions 35 converting data types 35 counters, repeating action with 59 creating objects 198 CSS. See cascading style sheets curly braces 30, 31, 32 checking for matching pairs 151 cursors, creating ... 5); trace (emma.getSpeed()); //traces 6 In object-oriented scripting, classes can receive properties and methods from each other according to a specific order, which is called inheritance. You can...
Ngày tải lên: 24/12/2013, 01:17