beginning c 2008 databases from novice to professional

... Data Sources window displaysthe data sources for the current startup project 5. Click the check that appears to the right of Customers node (if there’s no check,click the Customers node to make ... ControlBindingsCollectionobject, which is a collection of Bindingobjects, each of which you can add to the collection with its Addmethod A bound control can have a collection of bindings, each associated with a different ... too.Close the window and rerun the project to prove this 9. Put Customersback the way it was by changing WOLZA’s city back to Warszawaanddeleting customer zzz Click Save Data to propagate the changes

Ngày tải lên: 09/08/2014, 14:20

... e.employeeidinner join customers con o.customerid = c.customeridThe result of the first join, which matches orders to employees, is matched against matching row from the first join Since referential ... the select o.orderid OrderID,c.companyname CustomerName,e.lastname Employeefrom orders oinner joinemployees eon o.employeeid = e.employeeidinner join customers con o.customerid = c.customerid ... add aliases for each column in the select list This produces more customized column headings It has no effect on the rest of the query: select o.orderid OrderID,o.customerid CustomerID,e.lastname

Ngày tải lên: 09/08/2014, 14:20

... stack trace for the exception.Without this specific catchclause, the generic catchclause would have handled theexception (Try commenting out this catchclause and reexecuting the code to seewhich ... money from a checkingaccount to a savings account This involves two operations: deducting money from the checking account and adding it to the savings account Both must succeed together and be committed ... "); // Create commandSqlCommand cmd = conn.CreateCommand(); // Specify that a stored procedure to be executedcmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = "sp_DbException_1";

Ngày tải lên: 09/08/2014, 14:20

... SqlCommand cmd = new SqlCommand(); cmd.CommandText = "SELECT TOP 1 CustomerId, CompanyName FROM Customers"; cmd.Connection = conn; try { listBox1.Items.Clear(); // open connection conn.Open(); ... the click event handler for the fourth button. Listing 15-9. button4_Click() // create connection SqlConnection conn = new SqlConnection(@" data source = .\sqlexpress; integrated security ... StateChange event to two handlers conn.StateChange += new StateChangeEventHandler(ConnStateChange); conn.StateChange += new StateChangeEventHandler(ConnStateChange2); // create command SqlCommand

Ngày tải lên: 09/08/2014, 14:20

... contextDataContext db = new DataContext(connString);// create typed tableTable<Customers> customers = db.GetTable<Customers>(); // query databasevar custs =from c in customersselect c ; ... customersselect c ; // display customersforeach (var c in custs)Console.WriteLine( "{0} {1} {2} {3}",c.customerId,c.companyName,c.city,c.country); }}} 2. Run the program with Ctrl+F5 and you should ... 468 Trang 27public class Customerand then you’d have to change the typed table definition to Table<Customer> customers = db.GetTable<Customer>(); to be consistent The [Column]attribute

Ngày tải lên: 09/08/2014, 14:20

... 5-3.Selecting specific columnsUsing the WHERE Clause Queries can have WHERE clauses The WHERE clause allows you to specify criteria for selectingrows This clause can be complex, but we’ll stick to ... this discussion.) from orders o inner join employees e on o.employeeid = e.employeeidinner join customers c on o.customerid = c.customeridThe result of the first join, which matched orders to employees, ... NULLoperators (collectively called the null predicate instandard SQL) to select or exclude NULLcolumn values, respectively The following is a valid query but always produces zero rows:SELECT * FROM

Ngày tải lên: 12/08/2014, 10:21

... Catalog=Northwind;Integrated Security=True" Try ' open connection conn.Open() ' create command Dim cmd As SqlCommand = conn.CreateCommand() ' specify stored procedure to execute cmd.CommandType = CommandType.StoredProcedure ... Delete a customer delete from customers where customerid... return number for it begin transaction Add a customer insert into customers (customerid, companyname) values(@newcustid, @newconame) ... code editor with the button1_click event Insert the code in Listing 8-2 into the code editor Listing 8-2 button1_Click() Dim conn As New SqlConnection conn.ConnectionString = "Data Source=.\sqlexpress;"...

Ngày tải lên: 12/08/2014, 10:21

... block to close theconnection Note that creating a connection doesn’t actually connect to the database Youneed to call the Open method on the connection connec-To execute the query, you first create ... System.Data.Odbc The ODBC architecture is essentially a three-tier process An application uses ODBCfunctions to submit database requests ODBC converts the function calls to the protocol(call-level interface) ... describes someimportant classes in the Odbc namespace Table 9-5.Commonly Used Odbc Classes Classes Description OdbcCommand Executes SQL queries, statements, or stored procedures OdbcConnection

Ngày tải lên: 12/08/2014, 10:21

... backtoward the left, the controls wouldn’t readjust themselves according to the width of the resizedform Developers were bound to write code to shift controls accordingly to account for theuser resizing ... Form to your project You will also work with a ListBox control and see how to add items to that control 1. Navigate to Solution Explorer and select the WinApp project, right-click, and click Add ... adjacent to the Location drop-down list box, modify the path from http:// to http://localhost/Chapter15, which indicates that you are going to create a web site under IIS withthe name Chapter15 Click

Ngày tải lên: 12/08/2014, 10:21

... = conn.CreateCommand Trang 7'Specify that a stored procedure is to be executedcmd.CommandType = CommandType.StoredProcedurecmd.CommandText = "sp_DbException_2"Try'Open connectionconn.Open() ... released and a control has the focus MouseClick Occurs only when a control is being clicked by the mouse MouseDoubleClick Occurs when a control gets double-clicked by the mouse MouseDown Occurs when ... create procedure sp_DBException_2as set nocount oninsert into employees( employeeid,Firstname) 'Specify that a stored procedure is to be executedcmd.CommandType = CommandType.StoredProcedurecmd.CommandText

Ngày tải lên: 12/08/2014, 10:21

... databaseDim custs = From c In Customers _Select c 'display customersFor Each c In custsConsole.WriteLine("{0}, {1}, {2}, {3}", _c.customerId, c.companyName, c.city, c.counTry)Next End SubEnd ClassEnd ... System.Data.Linq.DataContextNamespace Chapter19 Class LinqToSql <Table(Name:="Customers")> _Public Class Customer <Column()> _Public customerId As String <Column()> _Public companyName ... 20-4.Click Test Connection 7. A message box should flash showing the message “Test connection succeeded.”Click OK Now click OK in the Connection Properties dialog box 8. The Choose Your Data Connection

Ngày tải lên: 12/08/2014, 10:21

... the mostcommon ones Table 2-1.Common HTTP Response Codes found and served correctly. a local, cached copy, and the server’s copy has not changed from this cached copy. authorization to access the ... attributes necessary to make a connection to the server; allows you to make selections such as GETor POST(more on that later), whether to connect asynchronously, and which URL to connect to setRequestHeader() ... applications by harnessing the collective power of PHP and Ajax! Trang 2Lee BabinBeginning Ajax with PHP From Novice to Professional Trang 3Beginning Ajax with PHP: From Novice to ProfessionalCopyright

Ngày tải lên: 15/11/2012, 14:19

... & color not accurate spine = 0.9682" 512 page count Books for professionals By professionals đ Beginning C# 2008 Databases: From Novice to Professional Dear Reader, This book focuses ... Databases The eXperTs Voice đ in .neT Beginning C# 2008 Databases From Novice to Professional cyan MaGenTa yelloW Black panTone 123 c Vidya Vrat Agarwal and James Huddleston Ranga Raghuram, ... data to an application developed using C# 2008. As you work your way through this book, you get a chance to explore the concepts covered by creating sample applications in “Try It Out” sections,...

Ngày tải lên: 08/08/2014, 18:21

... specific character string matches a specified pattern. A pattern can be created by using a combination of regular characters and wildcard characters. During pattern matching, regular characters ... this case, book titles such as C# 2008: An Introduction,” Accelerated C# 2008, and Beginning C# 2008 Databases will be listed. ã _ (underscore): A single underscore represents any single character. ... prompted to save changes to items. 2. Again, click File ➤ Connect Object Explorer. In the Connect to Server dialog box, select <ServerName>\SQLEXPRESS as the server name and then click Connect. 3....

Ngày tải lên: 08/08/2014, 18:21

... Wildcard Characters Wildcard Description % Any combination of characters. Where FirstName LIKE 'Mc%' selects all rows where the FirstName column equals McDonald, McBadden, McMercy, ... 96. CHAPTER 6 ■ USING STORED PROCEDURES 101 9004ch06final.qxd 12/13/07 4:16 PM Page 101 9004ch06final.qxd 12/13/07 4:16 PM Page 118 // specify stored procedure to execute cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText ... click Execute. You should see the message “Com- mand(s) completed successfully” in the results window. create procedure sp_Orders_By_EmployeeId @employeeid int as select orderid, customerid from...

Ngày tải lên: 08/08/2014, 18:21

... savings account. This involves two operations: deducting money from the checking account and adding it to the savings account. Both must succeed together and be committed to the accounts, or ... open the connection, you create a transaction. Note that transactions are con- nection specific. You can’t create a second transaction for the same connection before committing or rolling back the ... the following query and click Execute: SELECT Cust.CustomerID, OrderHeader.CustomerID, OrderHeader.SalesOrderID, OrderHeader.Status, Cust.CustomerType FROM Sales.Customer Cust, Sales.SalesOrderHeader OrderHeader WHERE...

Ngày tải lên: 08/08/2014, 18:21

... bold code to the try block of Listing 11-1. try { // open connection conn.Open(); // connect command to connection cmd.Connection = conn; Console.WriteLine("Connnected command to this connection."); } 2. ... Connection Constructor In the ConnectionSql project, you created the connection and specified the connection string in separate steps. Since you always have to specify a connection string, you can use ... {0}" , cmd.ExecuteScalar() ); } catch (SqlException ex) { Console.WriteLine(ex.ToString()); } finally { conn.Close(); Console.WriteLine("Connection Closed."); } } } } 3. Make CommandScalar...

Ngày tải lên: 08/08/2014, 18:21

... = @" select companyname, contactname from customers where contactname like 'M%' "; // create connection SqlConnection conn = new SqlConnection(connString); CHAPTER 12 ■ USING ... @" select * from employees "; // create connection SqlConnection conn = new SqlConnection(connString); try { conn.Open(); SqlCommand cmd = new SqlCommand(sql, conn); SqlDataReader rdr = cmd.ExecuteReader(); // store Employees ... 243 9004ch12final.qxd 12/13/07 4:07 PM Page 243 // query string sql = @" select productname, unitprice, unitsinstock, discontinued from products "; // create connection SqlConnection conn...

Ngày tải lên: 08/08/2014, 18:21

... properties in ascending order by name from “a” to “z.” You can switch to the Alphabetical view by clicking the icon located at the second posi- tion from the left of the toolbar shown in the top of the ... ( @firstname, @lastname, @titleofcourtesy, @city, @country ) "; // create connection SqlConnection conn = new SqlConnection(connString); try { // create data adapter SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand ... spaced to create visual appeal and ease of accessibility. Consistency Your user inter face should exhibit a consistent design acr oss each for m in y our applica - tion. An inconsistent design can...

Ngày tải lên: 08/08/2014, 18:21