c 2005 databases from novice to professional

... print for content only—size & color not accurate spine = 0.998" 528 page countBeginning C# 2005 Databases: From Novice to Professional Dear Reader, Thousands of C# programmers have become ... Introducing Connections 95 Introducing the Data Provider Connection Classes 95 Connecting to SSE with SqlConnection 96 Try It Out: Using SqlConnection 96 How It Works 98 Debugging Connections ... Expert C# 2005 Business Objects, Second Edition Beginning Trang 2James Huddleston, Ranga Raghuram,Syed Fahad Gilani, Jacob Hammer Pedersen, and Jon Reid Beginning C# 2005 Databases From Novice to Professional...

Ngày tải lên: 09/08/2014, 14:20

... of restore you’re doing requires exclusiveaccess, and SSMSE is currently connected to Northwind through the query Click OK to close the message box, then close the SQL edit window (click No whenprompted ... SqlClient(the NET dataprovider for SQL Server, to be covered in Chapter 4) The connection will useWindows Authentication, meaning any user who can log in to the server machinecan connect to the ... databasein C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\northwnd.mdf, andselect it Then click Test Connection A message box should appear telling you “Test connection succeeded.” Click OK to...

Ngày tải lên: 09/08/2014, 14:20

... Odbc namespace. Table 4-5. Commonly Used Odbc Classes Class Description OdbcCommand Executes SQL queries, statements, or stored procedures OdbcConnection Represents a connection to an ODBC data ... application uses ODBC functions to submit database requests. ODBC converts the function calls to the protocol ( call-level interface) of a driver specific to a given data source. The driver communicates ... Application project, named ConnectionOleDb, and rename Program.cs to ConnectionOleDb.cs 2 Replace the code in ConnectionOleDb.cs with that in Listing 5 -3 This is basically the same code as Connection.cs,...

Ngày tải lên: 09/08/2014, 14:20

... employees {0}\n" , cmdqry.ExecuteScalar() ); } catch (SqlException ex) { Console.WriteLine(ex.ToString()); } finally { conn.Close(); Console.WriteLine("Connection Closed."); } } } ... Parameters collection property of the command you want to parameterize: // create commands SqlCommand cmdqry = new SqlCommand(sqlqry, conn); SqlCommand cmdnon = new SqlCommand(sqlins, conn); // ... command with a connection • How to set command text • How to use ExecuteScalar() for queries that return single values • How to use ExecuteReader() to process result sets • How to use ExecuteNonQuery()...

Ngày tải lên: 09/08/2014, 14:20

... @"selectcontactname,countryfromcustomers "; // create connectionSqlConnection conn = new SqlConnection(connString); try{// Create data adapterSqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand ... sql2;// create connectionSqlConnection conn = new SqlConnection(connString); You create a data adapter, assigning to its SelectCommandproperty a command thatencapsulates the query and connection ... either connected or disconnected operations You left the standardconn.Close();in the finallyblock Since you can call Close()without error on a closed connection, it presents no problems if called...

Ngày tải lên: 09/08/2014, 14:20

... 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

... print for content only—size & color not accurate spine = 0.9682" 512 page countBeginning C# 2008 Databases: From Novice to Professional Dear Reader, This book focuses on accessing databases ... HuddlestonRanga Raghuram, Syed Fahad Gilani, Jacob Hammer Pedersen, and Jon Reid Beginning C# 2008 Databases From Novice to Professional Trang 4Beginning C# 2008 Databases: From Novice to ProfessionalCopyright ... 197 Connection String Parameters for SqlConnection 197 Connection Pooling 199 Improving Your Use of Connection Objects 199 Using the Connection String in the Connection Constructor ...

Ngày tải lên: 08/08/2014, 18:21

... Works listed in the CardType column of the CreditCard table Select CardType, ExpYear,count(CardType) AS 'Total Cards' from Sales.CreditCard WHEREcondition ensures that the cards listed will be ... complete process from conception to implementa-tion The entire development and implementation process of this cycle can be divided into small phases; only after the completion of each phase can you ... take many orders, which were placed bymany customers The products ordered may come from different suppliers, and chancesare that each supplier can supply more than one product All of these relationships...

Ngày tải lên: 08/08/2014, 18:21

... LastName columns Trang 2Figure 5-3.Selecting specific columnsUsing the WHERE Clause Queries can have WHEREclauses The WHEREclause allows you to specify criteria for ing rows This clause can be complex, ... Characters Wildcard Description % Any combination of characters Where FirstName LIKE 'Mc%' selects all rows where the FirstName column equals McDonald, McBadden, McMercy, and so on. _ Any one character ... table containing or not containing the result set returned by a SELECTquery SELECT INTOcopies the exact table structure and data into another table specified in the INTOclause Usually, a SELECTquery...

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 ... directive to Transaction.cs using System.Data.SqlClient; 6 Next you want to add a click event for the button Double-click button1, and it will open the code editor with the button1_click event ... Insert the code in Listing 8-2 into the code editor Listing 8-2 button1_Click()... transaction to both add a customer to and delete one from the Northwind Customers table The Customers table...

Ngày tải lên: 08/08/2014, 18:21

... String in the 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, ... Add a C# Console Application project named ConnectionDisplay to the Chapter10solution 2. Rename Program.csto ConnectionDisplay.cs When prompted to rename all ences to Program, you can click either ... "; Trang 13// create connectionSqlConnection conn = new SqlConnection(connString);try {// open connectionconn.Open(); Console.WriteLine("Connection opened."); }catch (SqlException e) {//...

Ngày tải lên: 08/08/2014, 18:21

... selectcompanyname,contactnamefrom customerswherecontactname like 'M%' "; // create connectionSqlConnection conn = new SqlConnection(connString); Trang 11try{// open connectionconn.Open();// create ... @"selectproductname,unitprice,unitsinstock,discontinuedfrom products "; // create connectionSqlConnection conn = new SqlConnection(connString);try {// open connectionconn.Open(); // create commandSqlCommand cmd = new SqlCommand(sql, ... selectcontactname,contacttitlefrom customerswherecontactname like 'M%' "; // create connectionSqlConnection conn = new SqlConnection(connString); try{conn.Open(); SqlCommand cmd = new SqlCommand(sql,...

Ngày tải lên: 08/08/2014, 18:21

... static void Main(string[] args){ // connection stringstring connString = @" select *fromemployeeswherecountry = 'UK' "; // create connectionSqlConnection conn = new SqlConnection(connString); ... firstname,lastname,titleofcourtesy,city, country) values Trang 15// create connectionSqlConnection conn = new SqlConnection(connString); try{// create data adapterSqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand ... original data source changes made to a dataset ■ Note Changes you make to a dataset aren’t automatically propagated to a database To save the changes in a database, you need to connect to the database...

Ngày tải lên: 08/08/2014, 18:21

... source view, so to see your change in effect, youneed to switch back to Design view When you have a lot of changes, it can be atedious process to see how each change made to the various controls ... were bound to write code to shift controls accord-ingly to account for the user resizing the form This technique was very code heavy and not so easy to implement With Visual Studio 2005 came two ... fromhttp://to http://localhost/Chapter15, which indicates that you are going to create a website under IIS with the name Chapter15 Click OK Now navigate to Solution Explorer so you can see what components...

Ngày tải lên: 08/08/2014, 18:21

... cmd = conn.CreateCommand(); // specify stored procedure to be executedcmd.CommandType = CommandType.StoredProcedure; cmd.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 ... 16-6.button5_Click()// create connectionSqlConnection conn = new SqlConnection(@" data source = \sqlexpress; integrated security = true; database = northwnd "); // create commandSqlCommand cmd...

Ngày tải lên: 08/08/2014, 18:21

... Giá c ng suất (đ/kW) giá điện (đ/kWh) c hiệu chỉnh theo thay đổi yếu tố đầu vào a Giá c ng suất: FCn = FCCn+FOMCn (1-3) - Tổng doanh thu c định đ c x c định theo c ng th c: FCCn (VND) = FCC0 ... phải thu hút từ khu v c t nhân nhà đầu t n c Luật Điện l c Việt Nam đời năm 2004 đề chơng trình c i c ch to n diện ngành điện C c yếu tố chiến l c cải c ch ngành điện đ c nêu Luật Điện là: hình ... trờng hợp c ng suất không khả dụng, doanh thu cho phần c ng suất cam kết cung c p cho hệ thống c yêu c u Mỗi tổ máy nhận đ c giá c ng suất cho chế độ làm vi c chế độ đáy biểu đồ phụ tải kh c tháng...

Ngày tải lên: 15/11/2012, 11:52