Visual Basic Statements

VB.NET > Statements

AddHandler	Call	Class	Const
Continue	Declare	Delegate	Dim
Do...Loop	Else	End	End
Enum	Erase	Error	Event
Exit

RaiseEvent	ReDim	REM	RemoveHandler
Resume	Return	Select...Case	Set
Stop	Structure	Sub	SyncLock
Then	Throw	Try...Catch...Finally	Using
While...End While	With...End With	Yield

Generics and Arrays Example in C#

C# > Generics > Generics and Arrays

Example: Use a single generic method that takes an IList<T> input parameter and iterate through both a list of integers and an array of string.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication2

{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)

        {
            string[] str = { "0", "1", "2", "3", "4" };
            List<int> intL = new List<int>();
            for (int x = 0; x < 5; x++)
            {
                intL.Add(x);
            }
            ProcessList<string>(str);
            ProcessList<int>(intL);
        }
        static void ProcessList<T>(IList coll)
        {
            foreach (T item in coll)
            {
                MessageBox.Show(item.ToString());
            }
        }
    }
}

Form VB.NET

VB.NET > Form

Form

Is a representation of any window displayed in an application.

Type

• standard
• tool
• borderless
• floating

Example

Create dialog box in runtime

Dim form1 As New Form()

Dim btnYes As New Button()

Dim btnNo As New Button()
btnYes.Text = "Yes"
btnYes.Location = New Point(5, 5)
btnNo.Text = "No"
btnNo.Location = New Point(btnYes.Left, btnYes.Top + 30)

form1.Controls.Add(btnYes)

form1.Controls.Add(btnNo)

form1.Text = "Confirm Dialog Box"

form1.FormBorderStyle = FormBorderStyle.FixedDialog
form1.MaximizeBox = False
form1.MinimizeBox = False
form1.AcceptButton = btnYes
form1.CancelButton = btnNo
form1.StartPosition = FormStartPosition.CenterScreen

form1.ShowDialog()

Object-Oriented Programming VB.NET

VB.NET > Object-Oriented Programming VB.NET

Visual Basic .NET has been entirely rewritten to be fully object-oriented and everything in Visual Basic .NET can be treated as an object.

OOP language:

• Abstraction
• Encapsulation
• Polymorphism
• Inheritance

Examplea

• Abstract class employee 
• Class with events

System Namespace VB.NET

VB.NET > System namespace

System namespace in VB.NET contains fundamental classes and base classes.

String

•  Concat

Create CDATA section XML C#

C# > XML > XmlDocument > CreateCDataSection

CreateCDataSection creates an XmlCDataSection.
CDATA is a section used to quote or escape blocks of text to keep that text from being interpreted as markup language.

Example:

XmlDocument doc = new XmlDocument();
doc.LoadXml("<product ID='1'></ product>");

//Create a CData section

XmlCDataSection CData;
CData = doc.CreateCDataSection("Size is 10/55");

//Add the new node to the document
XmlElement root = doc.DocumentElement;
root.AppendChild(CData);
doc.Save("C:\\Products.xml");

Result:

<product ID="1">

  <![CDATA[Size is 10/55]]>
</product>

Short type C# Example

C# > Types > short

The short keyword is an integral type.
Range: -32768 to 32767
Size: Signed 16-bit integer

Example:

short k = 32767; // ok
k = 32768; // Error Constant value '32768' cannot be converted to a 'short'