... "ORDER BY CustomerID"; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet(); mySqlConnection.Open(); ... "ORDER BY CustomerID"; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet(); mySqlConnection.Open(); ... Chapter 16, " ;Using SQL Server's XML Support." Using the WriteXml() Method Let's say you have a DataSet object named myDataSet. Assume that myDataSet has a DataTable that...
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... 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 ... 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 create a DataReader object ... object. For my installation of SQL Server, the password to access the Northwind database is sa, and my ConnectionString property is set to: data source=localhost;initial catalog=Northwind;persist...
... 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 ... established when there's a suitable connection already available. When you close a connection, that connection isn't actually closed; instead, your connection is marked as unused and ... " ;Creating a Connection Objectusing Visual Studio .NET" section. Next, you'll see how to open and close a connection. Opening and Closing a Database Connection Once you've...
... System; using System.Data; using System.Data.SqlClient; class StateChange { // define the StateChangeHandler() method to handle the // StateChange event public static void StateChangeHandler( ... mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler); Whenever the StateChange event fires, the StateChangeHandler() method will be called, which displays the original and current ... StateChange event using the StateChangeHandler() method mySqlConnection.StateChange += new StateChangeEventHandler(StateChangeHandler); // open mySqlConnection, causing the State to change...
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... the data in the control. Binding a DataGrid to a DataTable binds to the default view of the underlying DataTable. The DataView class represents a view of the DataTable that can be data bound ... Orders table from the Northwind sample database. ADataView is created from the table and bound to the data grid on the form. Allow Delete Button.Click Sets whether the DataView allows records ... Forms and Web Forms. The DataView can be customized for editing, filtering, searching, and sorting. The DataView class can be used to add, edit, or delete records in the underlying DataTable....
... Defining andUsinga Class In C#, you use the class keyword, a name, anda pair of curly braces to define a new class. The data and methods of the class occur in the body of the class, between ... 3.141592 * radius * radius; } double radius; } The body of a class contains ordinary methods (such as Area) and fields (such as radius)—remember that variables in a class are called fields. ... syntax for assigning literal class values to variables. (What is the Circle equivalent of 42?) Another reason concerns the way in which memory for variables of class types is allocated and managed...
... makes it easier to differentiate between metaverse namespace and connector namespace changes. Lab A: Creatingand Configuring a Management Agent Objectives After completing this lab, you ... each entry indicates that it is a connector namespace entry with a corresponding metaverse namespace entry. 2 Lab A: Creatingand Configuring a Management Agent BETA MATERIALS FOR MICROSOFT ... management agent called HR MA. a. In the control pane of MMS Compass, click Bookmarks, click Management Agents, and then click Create New Management Agent. b. In the Create Management Agent dialog...
... Objects from aDataView It's important to understand that DataRowView objects in aDataView provide access to the underlying DataRow objects in a DataTable. Therefore, when you examine and edit ... System; using System.Data; using System.Data.SqlClient; class AddModifyAndRemoveDataRowViews { public static void DisplayDataRow( DataRow myDataRow, DataTable myDataTable ) { Console.WriteLine("\nIn ... 13.3: ADDMODIFYANDREMOVEDATAROWVIEWS.CS /* AddModifyAndRemoveDataRowViews.cs illustrates how to add, modify, and remove DataRowView objects from aDataView */ using System; using...
... Creating a Command ObjectUsing Visual Studio .NET To create a SqlCommand objectusing Visual Studio .NET (VS .NET), you drag a SqlCommand object from the Data tab of the Toolbox ... with a SqlCommand object. This object is assigned the default name of sqlCommand1. Figure 8.1: A SqlCommand object in a form You then set the Connection property for your sqlCommand1 using ... CommandText property, and you can set parameters for a command by clicking the ellipsis button to the right of the Parameters property. You'll set the CommandText property of your SqlCommand...
... details are correct. At this point, you've entered all the mandatory details, and you can choose to save your details by clicking OK, or you can click Advanced to enter additional details ... You'll recall that a SqlConnection object allows you to connect to a SQL Server database. You can also drag an OleDbConnection object from the Toolbox to your form to connect to a database ... Creating a Connection ObjectUsing Visual Studio .NET To create a SqlConnection objectusing Visual Studio .NET, you drag a SqlConnection object from the Data tab of the Toolbox...
... Creating a DataAdapter ObjectUsing Visual Studio .NET In this section, you'll learn how to create a DataAdapter using Visual Studio .NET. Note You'll find a completed ... form. When you drag a SqlDataAdapter object to your form, you start the Data Adapter Configuration Wizard, as shown in Figure 10.8. Figure 10.8: The Data Adapter Configuration Wizard Click the ... SqlDataAdapter object in the tray Warning You need to set the Connection property of the SelectCommand in your sqlDataAdapter1 object to your Connection object before the DataAdapter can access...