G ANDREW DUTHIE MICROSOFT ASP DOT NET PROGRAMMING WITH VISUAL C SHARP DOT NET VERSION 2003 STEP BY S...

MS PRESS Working with Microsoft Visual Studio 2005 Team System MS.Press.MS.Visual.C.Sharp.2005.Step.by.Step.Oct.2005.rar.html PASSWORD: www.blueportal.org MS.Press.MS.ASP.[r]

Xem Thêm " CRACKER HANDBOOK 1.0 PART 121 POTX "

Xem Thêm " MEGANBOOK VERSION 6.1 PART 121 PPSX "

obtain the transaction object.Call the necessary SQL statements for data modification, including the transaction object in each SqlCommand.Call the transaction object’s Commit method to save the changes.Roll back a local transaction Create a valid SqlConnection and process data modifica-tion statement[r]

Set the SqlDataAdapter instance’s MissingSchemaAction property to MissingSchemaAction.Ignore. 191Chapter 12Guaranteeing Data IntegrityAfter completing this chapter, you will be able to:Understand ADO.NET’s use of optimistic concurrencyPerform transactions that include multiple record upda[r]

196 Microsoft ADO.NET 4 Step by StepInstead of creating instances of SqlTransaction directly, you generate connection-specific transactions using the SqlConnection object’s BeginTransaction method. Transactions work only on open database connections, so you must call the c[r]

216 Microsoft ADO.NET 4 Step by StepAssociation set All association instances for a defined association type appear as a distinct collection called an association set. On the model side of the Framework, an association set contains the field definitions that describ[r]

226 Microsoft ADO.NET 4 Step by StepNote The wizard’s capability to build a model from an existing database can be limited by se-curity rights and restrictions imposed on your database account. Make sure you have sufficient rights to the database tables and elements[r]

236 Microsoft ADO.NET 4 Step by StepIf not already available in your Visual Studio Integrated Development Environment (IDE), access the Mapping Details panel by right-clicking the model’s visual design surface and selecting Mapping Details from the sh[r]

salaryUpdate.Parameters.Add(paramValue)paramValue = New SqlParameter("@EmployeeID", SqlDbType.BigInt)paramValue.Value = 25&salaryUpdate.Parameters.Add(paramValue) Chapter 10 Adding Standards to Queries 157SqlParameter includes lots of constructor options for setting the data type of the pass[r]

C#SqlConnection linkToDB = new SqlConnection(connectionString);linkToDB.Open();string sqlText = @"UPDATE WorkTable SET ProcessedOn = GETDATE() WHERE ProcessedOn IS NULL";SqlCommand dataAction = new SqlCommand(sqlText, linkToDB);Visual BasicDim linkToDB As New SqlConnection(connectionString)li[r]

146 Microsoft ADO.NET 4 Step by StepAlong those same generic lines, the SqlDataReader object’s GetSchemaTable method returns a DataTable instance that describes the structure of the queried data. The new table’s content includes columns such as ColumnName, IsKey, and Data[r]

of specific SQL statements, you can define some or all of the four SqlComman d objects tied to the Sq lDataAdapter using parameterized stored procedures. Whether you use SQL statements or SQL Server stored procedures to modify the external data is up to you. The SqlDataAdapter will work as long as the[r]

166 Microsoft ADO.NET 4 Step by Step4. Just after the “Read the next set, which contains the orders” comment, add the follow-ing code:customerReader.NextResult() Do While (customerReader.Read = True) oneOrder = New OrderInfo oneOrder.ID = CLng(customerReader!ID)[r]

if (LocalServer.Checked == true) connection.DataSource = "(local)"; else connection.DataSource = ServerName.Text; if (IsExpressEdition.Checked == true) connection.DataSource += @"\SQLEXPRESS";This code defines the main SQL Server data source. The code differentiates between the Express Edition (an[r]

Visual Basic' Build an ad hoc collection, although you could also' include a fully realized class.Dim statusTable = {New With {.Code = "P", .Description = "Active Order"}, New With {.Code = "C", .Description = "Completed / Shipped"}, New With {.Code = "X", .Descrip[r]

LINQ to XML LINQ lets you query XML tags and attributes as if they were typical database elements. The LINQ to XML provider is not discussed in this book.LINQ is extensible, so third parties can develop their own providers. Several special-purpose providers already exist, enabling access to format[r]

296 Microsoft ADO.NET 4 Step by StepInternally, LINQ uses the Where extension method and a lambda expression that expresses the condition that filters the original collection.C#var results = transport.Where(tr => tr.SpeedClass == 1);Visual BasicDim results =[r]

316Like LINQ, the Entity Framework is a delayed-processing system. The actual retrieval of data (from the database) does not occur at the time you build a data query; instead, data is pro-cessed and returned to your application only when you attempt to reference specific entities and properties. When[r]

326 Microsoft ADO.NET 4 Step by StepCalling Custom Database Functions: C#Note This exercise continues the previous exercise in this chapter.1. Open the source code view for the StatesByYear form. This form will access the AdmittedInYear database function. Your sample data[r]

sqlPortion.InitialCatalog = "StepSample"; sqlPortion.IntegratedSecurity = true;Adjust these statements as needed to provide access to your own test database.258 Microsoft ADO.NET 4 Step by Step3. Locate the ActSingleEntity_Click event handler. This routine creates[r]

246 Microsoft ADO.NET 4 Step by StepGetting to Know Entity SQLEntity SQL is based in part on the T-SQL imperative query language found in Microsoft’s SQL Server product. Despite this lineage, there are some significant differences between T-SQL and Entity SQL:Enti[r]