using a datareader object in visual studio net

... visually create a DataReader object in Visual Studio .NET (VS .NET) ; you can only create them using program statements. In this section, you'll see how to create a SqlDataReader object and use ... keyboard, or select Debug â Start Without Debugging. Figure 9.4 shows the running form. Figure 9.4: The running form Using a DataReader Object in Visual Studio .NET You can't visually ... from a SqlCommand object, which you saw how to create using VS .NET in the previous chapter . That SqlCommand object contained a SELECT statement that retrieved the CustomerID, CompanyName, and...

Ngày tải lên: 07/11/2013, 10:15

... Creating a Command Object Using Visual Studio .NET To create a SqlCommand object using Visual Studio .NET (VS .NET) , you drag a SqlCommand object from the Data tab of the Toolbox ... named MyDataReader containing a Windows application. 2. Add a SqlConnection object to your project (refer back to the previous chapter to see how to add a SqlConnection object using VS .NET) . ... can also drag an OleDbCommand object from the Data tab of the Toolbox to your form. Before you perform the procedure explained in this section, do the following: 1. Create a new project named...

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 20/08/2013, 15:08

Ngày tải lên: 20/08/2013, 16:48

Ngày tải lên: 20/08/2013, 16:48

... different ways. An interface cannot exist as an object: It has no code and no place to store object data. A class that implements an interface has an explicit contract with the interface: The class ... Define a Class in Visual Basic .NET Before writing code, you should take a moment to decide what data the class needs to contain and what actions a developer (whether it is you or a teammate) ... CustomerID() As String Parameterized Properties You can also create properties that accept a parameter. For example, in the Northwind database, a customer might have many orders. A parameterized...

Ngày tải lên: 07/11/2013, 15:15

Ngày tải lên: 21/01/2014, 12:20

Ngày tải lên: 25/10/2013, 06:15

... using System; using System.Data; using System.Data.SqlClient; class ConnectionPooling { public static void Main() { // create a SqlConnection object to connect to the database, ... ADO .NET automatically stores database connections in a pool. Connection pooling offers a great performance improvement because you don't have to wait for a brand new connection to the database ... SqlConnection object to connect to a SQL Server database */ using System; using System.Data; using System.Data.SqlClient; class MySqlConnection { public static void Main() { // formulate a...

Ngày tải lên: 07/11/2013, 10:15