Using Windows Forms Controls

Oct 13, 2025 by miodeya.com 11 views

Introduction

Visual Basic 2005 and the .NET Framework 2.0 have revolutionized the world of programming, offering a wide range of features and tools that make it easier to develop robust, scalable, and maintainable applications. As a developer, you're likely eager to explore the capabilities of this powerful platform, and that's where these 101 VB.NET samples come in. In this article, we'll delve into the world of Visual Basic 2005 and the .NET Framework 2.0, showcasing the latest features and best practices for building high-quality applications.

Data Access Samples

The Data Access samples demonstrate how to use the classes in the System.Data and related namespaces to interact with databases. With the .NET Framework 2.0, you can now use the new features of SQL Server 2005, such as the SQL Server 2005 Express Edition, to build robust data-driven applications.

Using ADO.NET 2.0

ADO.NET 2.0 is a major upgrade to the ADO.NET data access technology, offering improved performance, scalability, and reliability. With ADO.NET 2.0, you can now use the following features:

Connection Pooling: ADO.NET 2.0 introduces connection pooling, which allows you to reuse existing connections to the database, reducing the overhead of creating new connections.
Parameterized Queries: ADO.NET 2.0 supports parameterized queries, which enable you to pass parameters to the query, improving performance and reducing the risk of SQL injection attacks.
Data Binding: ADO.NET 2.0 introduces data binding, which allows you to bind data to controls, making it easier to display and edit data in your applications.

Imports System.Data.SqlClient

Module Module1
    Sub Main()
        Dim connectionString As String = "Data Source=(local);Initial Catalog=Northwind;Integrated Security=True"
        Dim connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As New SqlCommand("SELECT * FROM Customers", connection)
        Dim reader As SqlDataReader = command.ExecuteReader()

        While reader.Read()
            Console.WriteLine(reader("CustomerID").ToString())
        End While

        reader.Close()
        connection.Close()
    End Sub
End Module

Using LINQ to SQL

LINQ to SQL is a new feature in the .NET Framework 2.0 that allows you to query databases using the Language Integrated Query (LINQ) syntax. With LINQ to SQL, you can now use the following features:

Querying Data: LINQ to SQL allows you to query data using the LINQ syntax, making it easier to retrieve and manipulate data.
Data Binding: LINQ to SQL supports data binding, which enables you to bind data to controls, making it easier to display and edit data in your applications.

Imports System.Data.Linq

Module Module1
    Sub Main()
        Dim db As New NorthwindDataContext()
        Dim customers As IQueryable(Of Customer) = From c In db.Customers
                                                    Select c

        For Each customer As Customer In customers
            Console.WriteLine(customer.CustomerID.ToString())
        Next
    End Sub
End Module

Windows Forms Samples

The Windows Forms samples demonstrate how to use the Windows Forms controls and classes to build robust and scalable Windows applications.

Using Windows Forms Controls

Windows Forms controls are the building blocks of Windows Forms applications. With the .NET Framework 2.0, you can now use the following features:

Button Control: The Button control is a basic control that allows users to click on it to perform an action.
TextBox Control: The TextBox control is a control that allows users to enter text.
Label Control: The Label control is a control that displays text.

Imports System.Windows.Forms

Module Module1
    Sub Main()
        Dim form As New Form()
        form.Text = "Windows Forms Sample"
        form.Width = 300
        form.Height = 200

        Dim button As New Button()
        button.Text = "Click Me"
        button.Location = New Point(100, 100)
        form.Controls.Add(button)

        Dim textBox As New TextBox()
        textBox.Location = New Point(100, 150)
        form.Controls.Add(textBox)

        Dim label As New Label()
        label.Text = "Hello, World!"
        label.Location = New Point(100, 50)
        form.Controls.Add(label)

        Application.Run(form)
    End Sub
End Module

ASP.NET Samples

The ASP.NET samples demonstrate how to use the ASP.NET controls and classes to build robust and scalable web applications.

Using ASP.NET Controls

ASP.NET controls are the building blocks of ASP.NET applications. With the .NET Framework 2.0, you can now use the following features:

Label Control: The Label control is a control that displays text.
TextBox Control: The TextBox control is a control that allows users to enter text.
Button Control: The Button control is a control that allows users to click on it to perform an action.

Imports System.Web.UI

Module Module1
    Sub Main()
        Dim page As New Page()
        page.Title = "ASP.NET Sample"
        page.Width = 300
        page.Height = 200

        Dim label As New Label()
        label.Text = "Hello, World!"
        label.Location = New Point(100, 50)
        page.Controls.Add(label)

        Dim textBox As New TextBox()
        textBox.Location = New Point(100, 150)
        page.Controls.Add(textBox)

        Dim button As New Button()
        button.Text = "Click Me"
        button.Location = New Point(100, 100)
        page.Controls.Add(button)

        page.DataBind()
    End Sub
End Module

Conclusion

Introduction

In our previous article, we explored the 101 VB.NET samples, demonstrating the latest features and best practices for building high-quality applications using Visual Basic 2005 and the .NET Framework 2.0. In this article, we'll answer some of the most frequently asked questions about the 101 VB.NET samples, providing additional insights and guidance for developers.

Q&A

Q: What is the purpose of the 101 VB.NET samples?

A: The 101 VB.NET samples are designed to demonstrate the latest features and best practices for building high-quality applications using Visual Basic 2005 and the .NET Framework 2.0. The samples cover a wide range of topics, including data access, Windows Forms, and ASP.NET.

Q: What are the benefits of using the 101 VB.NET samples?

A: The 101 VB.NET samples offer several benefits, including:

Improved productivity: The samples provide a starting point for building applications, saving developers time and effort.
Increased knowledge: The samples demonstrate the latest features and best practices, helping developers to improve their skills and knowledge.
Better code quality: The samples showcase best practices for coding, ensuring that applications are robust, scalable, and maintainable.

Q: How can I use the 101 VB.NET samples in my own projects?

A: The 101 VB.NET samples are designed to be used as a starting point for building your own applications. You can:

Copy and paste code: Copy and paste code from the samples into your own projects.
Modify and extend code: Modify and extend the code in the samples to suit your own needs.
Use as a reference: Use the samples as a reference for building your own applications.

Q: What are the system requirements for running the 101 VB.NET samples?

A: The 101 VB.NET samples require:

Visual Studio 2005: The samples are designed to be run in Visual Studio 2005.
.NET Framework 2.0: The samples require the .NET Framework 2.0 to be installed.
Windows XP or later: The samples can be run on Windows XP or later.

Q: Can I use the 101 VB.NET samples with other versions of Visual Studio?

A: The 101 VB.NET samples are designed to be used with Visual Studio 2005. However, you may be able to use the samples with other versions of Visual Studio, such as Visual Studio 2008 or later.

Q: Are the 101 VB.NET samples compatible with other programming languages?

A: The 101 VB.NET samples are written in Visual Basic 2005 and are designed to be used with the .NET Framework 2.0. However, you may be able to use the samples with other programming languages, such as C# or F#.

Conclusion

In this article, we've answered some of the most frequently asked questions about the 101 VB.NET samples, providing additional insights and guidance for developers. Whether you're a seasoned developer or just starting out, the 101 VB.NET samples are a valuable resource for building high-quality applications using Visual Basic 2005 and the .NET Framework 2.0.

Additional Resources

Visual Studio 2005: Download Visual Studio 2005 from the Microsoft website.
.NET Framework 2.0: Download the .NET Framework 2.0 from the Microsoft website.
101 VB.NET Samples: Download the 101 VB.NET samples from the Microsoft website.

101 C# Samples: Explore the 101 C# samples, demonstrating the latest features and best practices for building high-quality applications using C# and the .NET Framework 2.0.
101 F# Samples: Explore the 101 F# samples, demonstrating the latest features and best practices for building high-quality applications using F# and the .NET Framework 2.0.