creating a strongly typed dataset in vb net
Tài liệu Replacing Null Values in a Strongly Typed DataSet ppt
... Typed DataSet Problem When a column in a database has a null value, you want the value in the DataSet to be a string indicating that no value is available. Solution Use annotations in the ... Description values are replaced with the string "- no description available -". The annotations are marked in bold in Example 2-25. Example 2-25. File: TypedDataSets\CategoriesDS_AnnotatedNull.xsd ... StringBuilder result = new StringBuilder( ); // Create the DataAdapter. SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Categories", ConfigurationSettings.AppSettings["Sql_ConnectString"]);...
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Tài liệu Controlling the Names Used in a Strongly Typed DataSet pdf
... name Annotation DataTable TableNameDataTable typedPluralDataTable methods NewTableNameRowAddTableNameRowDeleteTableNameRow typedNameDataRowCollection TableName typedPluralDataRow TableNameRow ... typed DataSet and the default names and available annotations for each. Table 2-18. Default values and available annotations for elements of strongly typed DataSet objects Element Default name ... TableNameRow typedNameDataColumn DataTable.ColumnNameColumnDataRow.ColumnName typedNameProperty PropertyNametypedNameChild accessor GetChildTableNameRows typedChildren Parent accessor TableNameRow...
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Tài liệu Modifying Data Using a Strongly Typed DataSet pptx
... Using a Strongly Typed DataSet In Chapter 10, you saw how to create and use a strongly typed DataSet class named MyDataSet. You can use objects of this class to represent the Customers table ... table and rows from that table. In this section, you'll see how to modify data using a strongly typed object of the MyDataSet class. Note One of the features of a strongly typed DataSet ... object allows you to read a column value using a property with the same name as the column. For example, to read the CustomerID of a column you can use myDataRow.CustomerID rather than myDataRow["CustomerID"]....
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Tài liệu Creating a Class That Participates in an Automatic Transaction ppt
... programmatically to participate automatically in an existing transaction, to start a new transaction, or to not participate in a transaction. The following steps prepare a class to participate in ... they can participate in an automatic transaction. Once an object is marked to participate in a transaction, it will automatically execute within a transaction. The object's transactional ... transactions that span multiple remote databases and multiple resource managers. • Objects participating in automatic transactions do not need to anticipate how they might be used within a...
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Tài liệu Creating a Command Object Using Visual Studio .NET docx
... 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...
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Tài liệu Creating a Connection Object Using Visual Studio .NET pdf
... returned in a connection that has been previously opened. You'll typically want to leave this in the default setting of False.Coding an Event in VS .NET You can add code for an event in VS .NET. ... stored in the actual code, and anyone could get your password from the code. Leave Allow Saving Password in its default non-enabled state; that way, the user will be prompted to enter the password. ... Creating a Connection Object Using Visual Studio .NET To create a SqlConnection object using Visual Studio .NET, you drag a SqlConnection object from the Data tab of the Toolbox...
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Tài liệu Creating a DataAdapter Object Using Visual Studio .NET doc
... Creating a DataAdapter Object Using Visual Studio .NET In this section, you'll learn how to create a DataAdapter using Visual Studio .NET. Note You'll find a completed VS .NET ... Properties window for sqlDataAdapter1: • Configure Data Adapter This link allows you to re-enter the Wizard to configure your DataAdapter. • Generate Dataset This link allows you to generate a DataSet ... directory and using that project as your starting point. Open your form by double-clicking Form1.cs in the Solution Explorer window. Next, create a SqlDataAdapter object by dragging a SqlDataAdapter...
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Tài liệu VB .NET Language in a Nutshell pdf
... offered a graphical interface that was suitable for Windows applications, VB .NET and Visual Studio .NET aim at providing a graphical interface that is suitable for developing web applications and ... taking full advantage of the Internet as an application-development platform, as well as for developing Windows applications and components. 1.2 What Is VB .NET? VB .NET is a programming language ... type Integer. (In VB 6, the variables i and j would have type Variant, which is VB 6's default data type.) VB .NET permits the initialization of variables in the same line as their declaration...
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Tài liệu Creating a DataSet Object Using Visual Studio .NET docx
... The running form Creating a DataSet Object Using Visual Studio .NET In this section, you'll learn how to create a DataSet using Visual Studio .NET. Note You'll find a completed ... Generate Dataset link at the bottom of the Properties window of your DataAdapter. You can see this link in Figure 10.13. You'll use the second step, so go ahead and click the Generate Dataset ... you can perform either one of the following: • Drag a DataSet object from the Data tab of the Toolbox to your form, and add code to your form to fill it using the Fill() method of a DataAdapter...
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Lab 4.1.4 Creating a Network Map using CDP
... include any other type of interface even though a specific router may contain one. An example of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that ... Interface #1 Serial Interface #2 Interface #5 800 (806) Ethernet 0 (E0) Ethernet 1 (E1) 1600 Ethernet 0 (E0) Ethernet 1 (E1) Serial 0 (S0) Serial 1 (S1) 1700 FastEthernet 0 (FA0) FastEthernet ... CCNA 2: Routers and Routing Basics v 3.0 - Lab 4.1.4 Copyright 2003, Cisco Systems, Inc. Router Interface Summary Router Model Ethernet Interface #1 Ethernet Interface #2 Serial Interface...
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Tài liệu Hướng dẫn lập trình VB.NET Chương 18: Làm việc với máy in pdf
... dành cho việc in ấn, khai báo đặt ngay sau khai báo lớp form1: Private PrintPageSetting As New PageSettings() Private StringToPrint As String Private PrintFont As New Font("Arial", 10)Các ... System.Drawing.PrintingModule ModulePrinting Public Sub PrintGraphic(ByVal sender As Object, _ ByVal ev As PrintPageEventArgs) 'Vẽ ảnh đồ h a bằng DrawImage ev.Graphics.DrawImage _ (Image.FromFile(Form1.TextBox1.Text), ... sẵn c a PrintDocument1. Thủ tục này có nội dung như sau: Dim sokytu, sodong As Integer Dim chuoiin As String Dim chuoidinhdang As New StringFormat() 'Định ngh a vùng có thể in ra d a trên...
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Tài liệu Make a Generic Search Form in an ASP.NET docx
... the LoadIndividual routine by entering the code shown in Listing 8.47 in the form. Taking the strCustID passed from the results of the search, a data adapter is created, and a data table is ... Label Caption Company Name Label Caption Contact Label Caption Contact Title Label Caption Address Label Caption City Button Name btnZ Caption Z Button Name btnAll Caption All DataGrid ... Number Private Sub dgSearch_PageIndexChanged(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridPageChangedEventArgs) Handles dgSearch.PageIndexChanged ' Set the...
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Tài liệu Module 11: Creating a Security Design for Network Perimeters ppt
... explain how a Land attack and a SYN flood attack (or SYN-ACK attack) can prevent users from retrieving their e-mail. Use the Internet to locate information about how Land and SYN-ACK attacks affect ... Acts as the main connection for computers on the internal network that are accessing the Internet. As a firewall, the bastion host is designed to defend against attacks that are aimed at the internal ... users about security. Increasing user awareness through information campaigns and training can help change behavior and prevent users from creating network vulnerabilities. For more information,...
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Tài liệu Creating a DataView Using Visual Studio .NET pptx
... Properties window for sqlDataAdapter1. Accept the defaults in the dialog box, and click the OK button to create a DataSet object named dataSet1 1. 5. Drag a DataView object from the Data tab of the ... Northwind database. Remember to add a substring containing the password (pwd=sa, or similar). 4. Click on the sqlDataAdapter1 object in your form, and then click the Generate Dataset link at ... Creating a DataView Using Visual Studio .NET In this section, you'll learn how to create a DataView using Visual Studio .NET (VS .NET) . You can follow along with the steps described in...
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Tài liệu Creating a Simple ASP.NET Web Application Using VS .NET pptx
... form, and in this case, the code-behind file is Web-Form1.aspx.cs. The AutoEventWireUp attribute indicates whether the ASP .NET framework automatically calls the Page_Init() and Page_Load() event ... "But, soft! what light through yonder window breaks?\n" + you wanted to access a database, you would open the database connection in the Page_Load() method. The OnInit() and InitializeComponent() ... Page_Load event is raised. The Page_Load event is raised whenever the Web form is loaded by a browser. Typically, you'll place any initialization code in the Page_Load() method. For example,...
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