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  • c#与VB.net对比

制作者:剑锋冷月 单位:无忧统计网,www.51stat.net
 

  1.0   Introduction1.1   Purpose & Scope

  This document is to compare the syntax between the VB.Net and C#.Net for various coding concepts.

  2.0   Comparison 2.1   Program Structure

VB.NET C#.NET

Imports System
Namespace Hello
  Class HelloWorld
   Overloads Shared Sub Main(ByVal args() As String)
     Dim name As String = "VB.NET"
     'See if an argument was passedfrom the command line
     If args.Length = 1 Then name = args(0)
     Console.WriteLine("Hello, " & name & "!")
   End Sub
  End Class
End Namespace

using System;
namespace Hello {
  public class HelloWorld {
   public static void Main(string[] args) {
     string name = "C#";
     // See if an argument was passed from thecommand line
     if (args.Length == 1)
       name = args[0];
     Console.WriteLine("Hello, " + name + "!");
   }
  }
}

2.2   Comments
VB.NET C#.NET

' Single line only
REMSingle line only
''' <summary>XML comments</summary>

// Single line
/* Multiple
  line */
/// <summary>XML comments on single line</summary>
/** <summary>XML comments on multiple lines</summary> */

2.3   Data Types
VB.NET C#.NET

Value Types
Boolean
Byte, SByte
Char
Short, UShort, Integer, UInteger, Long, ULong
Single, Double
Decimal
Date
  
Reference Types
Object
String
  
Initializing
Dim correct As Boolean = True
Dim b As Byte = &H2A  'hex
Dim o As Byte = &O52  'octal
Dim person As Object = Nothing
Dim name As String = "Dwight"
Dim grade As Char = "B"c
Dim today As Date = #12/31/2007 12:15:00 PM#
Dim amount As Decimal = 35.99@
Dim gpa As Single = 2.9!
Dim pi As Double = 3.14159265
Dim lTotal As Long = 123456L
Dim sTotal As Short = 123S
Dim usTotal As UShort = 123US
Dim uiTotal As UInteger = 123UI
Dim ulTotal As ULong = 123UL
  
Type Information
Dim x As Integer
Console.WriteLine(x.GetType())     'Prints System.Int32
Console.WriteLine(GetType(Integer))  ' Prints System.Int32
Console.WriteLine(TypeName(x))    ' Prints Integer
  
Type Conversion
Dim d As Single = 3.5
Dim i As Integer = CType(d, Integer)  ' set to 4 (Banker's rounding)
i = CInt(d) ' same result as CType
i = Int(d)  ' set to 3 (Int function truncates the decimal)

Value Types
bool
byte, sbyte
char
short, ushort, int, uint, long, ulong
float,double
decimal
DateTime  (not a built-in C#type)
  
Reference Types
object
string
  
Initializing
bool correct = true;
byte b = 0x2A;  // hex
object person = null;
string name = "Dwight";
char grade = 'B';
DateTime today = DateTime.Parse("12/31/2007 12:15:00");
decimal amount = 35.99m;
float gpa = 2.9f;
double pi = 3.14159265;
long lTotal = 123456L;
short sTotal = 123;
ushort usTotal = 123;
uint uiTotal = 123;
ulong ulTotal = 123;
  
Type Information
int x;
Console.WriteLine(x.GetType());       // Prints System.Int32
Console.WriteLine(typeof(int));        // Prints System.Int32
Console.WriteLine(x.GetType().Name);  // prints Int32
  
Type Conversion
float d = 3.5f;
int i = (int)d;  // set to3 (truncates decimal)

2.4   Constants
VB.NET C#.NET

ConstMAX_STUDENTS As Integer = 25
  
' Can set to a const orvar; may be initialized in a constructor
ReadOnly MIN_DIAMETER As Single = 4.93

const int MAX_STUDENTS = 25;
  
// Can set to a const or var; may be initialized in a constructor
readonly float MIN_DIAMETER = 4.93f;

2.5   Enumerations
VB.NET C#.NET

Enum Action
 Start
 [Stop] ' Stopis a reserved word
 Rewind
 Forward
End Enum
EnumStatus
 Flunk = 50
 Pass = 70
 Excel = 90
End Enum
Dim a As Action = Action.Stop
If a <> Action.Start Then _
 Console.WriteLine(a.ToString & " is " & a)   ' Prints "Stop is 1"
Console.WriteLine(Status.Pass)  ' Prints 70
Console.WriteLine(Status.Pass.ToString())  ' Prints Pass

enum Action {Start, Stop, Rewind, Forward};
enum Status {Flunk = 50, Pass = 70, Excel = 90};
Action a = Action.Stop;
if (a != Action.Start)
 Console.WriteLine(a + " is " + (int) a);  // Prints "Stop is 1"
Console.WriteLine((int) Status.Pass);  // Prints 70
Console.WriteLine(Status
.Pass);   // Prints Pass

2.6   Operators
VB.NET C#.NET

Comparison
= < > <= >= <>
  
Arithmetic
+ - * /
Mod
" (integer division)
^ (raise to a power)
  
Assignment
= += -= *= /= "= ^= <<= >>= &=
  
Bitwise
And  Or  Xor  Not  <<  >>
  
Logical
AndAlso  OrElse  And  Or  Xor  Not
  
Note: AndAlso and OrElse perform short-circuit logical evaluations
  
String Concatenation
&

Comparison
== < > <= >= !=
  
Arithmetic
+ - * /
% (mod)
/ (integer division if both operands are ints)
Math.Pow(x, y)
  
Assignment
= += -= *= /=  %= &= |= ^= <<= >>= ++ --
  
Bitwise
&  |  ^  ~  <<  >>
  
Logical
&&  ||  &  |  ^  !
  
Note: && and||perform short-circuit logical evaluations
  
String Concatenation
+

2.7   Choices
VB.NET C#.NET

greeting = IIf(age < 20, "What's up?", "Hello")
  
' One line doesn't require "End If"
If age < 20 Then greeting = "What's up?"
If age < 20 Then greeting = "What's up?" Else greeting = "Hello"
  
' Use : to put two commands on same line
If x <> 100 And y < 5 Then x *= 5 : y *= 2 
  
' Preferred
If x <> 100 And y < 5 Then
 x *= 5
 y *= 2
End If
  
' To break up any long single line use _
If whenYouHaveAReally < longLine And _
 itNeedsToBeBrokenInto2> LinesThen _
 UseTheUnderscore(charToBreakItUp)
  
'If x > 5 Then
 x *= y
ElseIfx = 5 Then
 x += y
ElseIf x < 10 Then
 x -= y
Else
 x /= y
End If
  
Select Case color  ' Must be a primitive data type
 Case "pink", "red"
  r += 1
 Case "blue"
  b += 1
 Case "green"
  g += 1
 Case Else
  other += 1
End Select

greeting = age < 20 ? "What's up?" : "Hello";
  
if (age < 20)
 greeting = "What's up?";
else
 greeting = "Hello";
  
// Multiple statements must be enclosed in {}
if (x != 100 && y < 5) { 
 x *= 5;
 y *= 2;
}
  
No need for _ or : since ; is used to terminate each statement.
  
if (x > 5)
 x *= y;
else if (x == 5)
 x += y;
else if (x < 10)
 x -= y;
else
 x /= y;
  
// Every case must end with break or goto case
switch (color){             // Must be integer or string
 case "pink":
 case "red":  r++;  break;
 case "blue":  b++;  break;
case "green": g++;  break;
default:  other++;  break;    // break necessary on default
}

2.8   Loops
VB.NET C#.NET

Pre-test Loops:

 

While c < 10
 c += 1
End While

Do Until c = 10
 c+= 1
Loop

Do While c < 10
 c += 1
Loop

For c = 2 To 10 Step 2
 Console.WriteLine(c)
Next

Post-test Loops:

 

Do
 c += 1
Loop While c < 10

Do
 c += 1
Loop Until c = 10

' Array or collection looping
Dim names As String() = {"Fred", "Sue", "Barney"}
For Each s As StringIn names
 Console.WriteLine(s)
Next
  
' Breaking out of loops
Dim i As Integer = 0
While (True)
 If (i = 5) Then Exit While
 i += 1
End While
  
' Continue to next iteration
For i = 0 To 4
 If i < 4 Then Continue For
 Console.WriteLine(i)  ' Only prints 4
Next

Pre-test Loops:
  
// no "until" keyword
while (c < 10)
 c++;
for (c = 2; c <= 10; c += 2)
 Console.WriteLine(c);
  
Post-test Loop:
do
 c++;
while (c < 10);
  
// Array or collection looping
string[] names = {"Fred", "Sue", "Barney"};
foreach (string s in names)
 Console.WriteLine(s);
  
// Breaking out of loops
int i = 0;
while (true) {
 if (i == 5)
  break;
 i++;
}
  
// Continue to next iteration
for (i = 0; i < 5; i++) {
 if (i < 4)
  continue;
 Console.WriteLine(i);  // Only prints 4
}

2.9   Arrays
VB.NET C#.NET

Dim nums() As Integer = {1, 2, 3}
For i As Integer = 0 To nums.Length - 1
 Console.WriteLine(nums(i))
Next
' 4 is the index of the last element, so it holds 5 elements
Dim names(4) As String
names(0) = "David"
names(5) = "Bobby" ' Throws System.IndexOutOfRangeException
' Resize the array, keeping the existing values (Preserve is optional)
ReDim Preserve names(6)
  
Dim twoD(rows-1, cols-1) As Single
twoD(2, 0) = 4.5
Dim jagged()() As Integer = { _
 New Integer(4) {}, New Integer(1) {}, New Integer(2) {} }
jagged(0)(4) = 5

int[] nums = {1, 2, 3};
for (int i = 0; i < nums.Length; i++)
 Console.WriteLine(nums[i]);
// 5 is the size of the array
string[] names = new string[5];
names[0] = "David";
names[5] = "Bobby";  // Throws System.IndexOutOfRangeException
// C# can't dynamically resize an array. Just copy into new array.
string[] names2 = new string[7];
Array.Copy(names, names2, names.Length);  // or names.CopyTo(names2, 0);
  
float[,] twoD = new float[rows, cols];
twoD[2,0] = 4.5f; 
  
int[][] jagged = new int[3][] {
 new int[5], new int[2], new int[3] };
jagged[0][4] = 5;

2.10Functions
VB.NET C#.NET

' Pass by value (in, default), reference (in/out), andreference (out) 
Sub TestFunc(ByVal x As Integer, ByRef y As Integer, ByRef z As Integer)
 x += 1
 y += 1
 z = 5
End Sub
  
Dim a = 1, b = 1, c As Integer ' cset to zero by default 
TestFunc(a, b, c)
Console.WriteLine("{0} {1} {2}", a, b, c)  ' 12 5
  
' Accept variable number of arguments
Function Sum(ByVal ParamArray nums As Integer()) As Integer
 Sum = 0 
 For Each i As Integer In nums
  Sum += i
 Next
End Function  ' Or use Return statement like C#
Dim total As Integer = Sum(4, 3, 2, 1)  ' returns 10
  
' Optional parameters must belisted lastand must have a default value
Sub SayHello(ByVal name As String, Optional ByVal prefix As String = "")
 Console.WriteLine("Greetings, " & prefix & " " & name)
End Sub
SayHello("Strangelove", "Dr.")
SayHello("Madonna")

// Pass by value (in, default), reference (in/out), andreference (out)
void TestFunc(int x, ref int y, out int z) {
 x++; 
 y++;
 z = 5;
}
  
int a = 1, b = 1, c; // c doesn't need initializing
TestFunc(a, ref b, out c);
Console.WriteLine("{0} {1} {2}", a, b, c); // 1 2 5
  
// Accept variable number of arguments
int Sum(params int[] nums) {
 int sum = 0;
 foreach (int i in nums)
  sum += i;
 return sum;
}
  
int total = Sum(4, 3, 2, 1);  // returns 10
  
/* C# doesn'tsupport optional arguments/parameters. Just create two different versions of the same function. */ 
void SayHello(string name, string prefix) {
 Console.WriteLine("Greetings, " + prefix + " " + name);
}
void SayHello(string name) {
 SayHello(name, "");
}

2.11Strings
VB.NET C#.NET

Special character constants
vbCrLf, vbCr, vbLf, vbNewLine
vbNullString
vbTab
vbBack
vbFormFeed
vbVerticalTab
""
  
' String concatenation (use & or +)
Dim school As String = "Harding" & vbTab
school = school & "University" ' school is "Harding (tab) University"
  
' Chars
Dim letter As Char = school.Chars(0)  ' letter is H
letter = Convert.ToChar(65)        ' letter is A
letter = Chr(65)                ' same thing
Dim word() As Char = school.ToCharArray() ' word holds Harding
  
' No string literal operator 
Dim msg As String = "File is c:"temp"x.dat"
  
' String comparison
Dim mascot As String = "Bisons"
If (mascot = "Bisons") Then ' true
If (mascot.Equals("Bisons")) Then  ' true
If (mascot.ToUpper().Equals("BISONS"))Then ' true
If (mascot.CompareTo("Bisons") = 0) Then ' true
  
Console.WriteLine(mascot.Substring(2, 3)) ' Prints "son"
  
' String matching
If ("John 3:16" Like "Jo[Hh]? #:*") Then  'true
Imports System.Text.RegularExpressions  ' More powerful than Like
Dim r As New Regex("Jo[hH]. "d:*")
If (r.Match("John 3:16").Success) Then  'true
  
' My birthday: Oct 12, 1973
Dim dt As New DateTime(1973, 10, 12)
Dim s As String = "My birthday: " & dt.ToString("MMM dd, yyyy")
  
' Mutable string
Dim buffer As New System.Text.StringBuilder("two ")
buffer.Append("three ")
buffer.Insert(0, "one ")
buffer.Replace("two", "TWO")
Console.WriteLine(buffer)     ' Prints "one TWO three"

Escape sequences
"r  // carriage-return
"n  // line-feed
"t  // tab
""  // backslash
""  // quote
// String concatenation
string school = "Harding"t";
school = school + "University";  // school is "Harding (tab) University"
  
// Chars
char letter = school[0];      // letter is H
letter = Convert.ToChar(65);   // letter is A
letter = (char)65;          // same thing
char[] word = school.ToCharArray();  // word holds Harding
  
// String literal
string msg = @"File is c:"temp"x.dat";
// same as
string msg = "File is c:""temp""x.dat";
  
// String comparison
stringmascot = "Bisons";
if (mascot == "Bisons")  // true
if (mascot.Equals("Bisons")) // true
if (mascot.ToUpper().Equals("BISONS"))  // true
if (mascot.CompareTo("Bisons") == 0)  // true
  
Console.WriteLine(mascot.Substring(2, 3));  // Prints "son"
  
// String matching
// No Like equivalent - use regular expressions
using System.Text.RegularExpressions;
Regex r = new Regex(@"Jo[hH]. "d:*");
if (r.Match("John 3:16").Success)  // true
  
// My birthday: Oct 12, 1973
DateTime dt = new DateTime(1973, 10, 12);
string s = "My birthday: " + dt.ToString("MMM dd, yyyy");
  
// Mutable string
System.Text.StringBuilder buffer = new System.Text.StringBuilder("two ");
buffer.Append("three ");
buffer.Insert(0, "one ");
buffer.Replace("two", "TWO");
Console.WriteLine(buffer);   // Prints "one TWO three"

2.12Exception Handling
VB.NET C#.NET

' Throw an exception
Dim ex As New Exception("Something is really wrong.")
Throw ex 
  
' Catch an exception
Try
 y = 0
 x = 10 / y
Catch ex As ExceptionWhen y = 0 ' Argument and When is optional
 Console.WriteLine(ex.Message)
Finally
 Beep()
End Try
  
' Deprecated unstructured error handling
On Error GoTo MyErrorHandler
...
MyErrorHandler: Console.WriteLine(Err.Description)

// Throw an exception
Exception up = new Exception("Something is really wrong.");
throw up; // ha ha
  
// Catch an exception
try {
 y = 0;
 x = 10 / y;
}
catch (Exception ex) {  // Argument is optional, no "When" keyword
 Console.WriteLine(ex.Message);
}
finally {
 // Requires reference to the Microsoft.VisualBasic.dll
 // assembly (pre .NET Framework v2.0)
 Microsoft.VisualBasic.Interaction.Beep();
}

2.13Namespaces
VB.NET C#.NET

Namespace Harding.Compsci.Graphics
 ...
End Namespace
  
' or
  
Namespace Harding
 Namespace Compsci
  Namespace Graphics
   ...
  End Namespace
 End Namespace
End Namespace
  
Imports Harding.Compsci.Graphics

namespace Harding.Compsci.Graphics {
 ...
}
  
// or
  
namespace Harding {
 namespace Compsci {
  namespace Graphics {
   ...
  }
 }
}
  
using Harding.Compsci.Graphics;

2.14Classes / Interfaces
VB.NET C#.NET

Accessibility keywords
Public
Private
Friend          
Protected
Protected Friend
Shared
  
' Inheritance
ClassFootballGame
 InheritsCompetition
 ...
End Class
  
' Interface definition
Interface IAlarmClock
 ...
End Interface
  
// Extending an interface
Interface IAlarmClock
 Inherits IClock
 ...
End Interface
  
// Interface implementation
Class WristWatch
 Implements IAlarmClock, ITimer
  ...
End Class

Accessibility keywords
public
private
internal
protected
protected internal
static
  
// Inheritance
classFootballGame : Competition {
 ...
}
  
// Interface definition
interface IAlarmClock {
 ...
}
  
// Extending an interface
interface IAlarmClock : IClock {
 ...
}
  
// Interface implementation
class WristWatch : IAlarmClock, ITimer {
  ...
}

2.15Constructors / Destructors
VB.NET C#.NET

Class SuperHero
 Private_powerLevel As Integer
 Public Sub New()
  _powerLevel = 0
 End Sub
 Public Sub New(ByVal powerLevel As Integer)
  Me._powerLevel = powerLevel
 End Sub
 Protected Overrides Sub Finalize()
 ' Desctructor code to free unmanaged resources
  MyBase.Finalize()
 End Sub
End Class

class SuperHero {
 private int _powerLevel;
 public SuperHero() {
  _powerLevel = 0;
 }
 public SuperHero(int powerLevel) {
  this._powerLevel= powerLevel;
 }
 ~SuperHero() {
  // Destructor code to free unmanaged resources.
  // Implicitly creates a Finalize method
 }
}

2.16Using Objects
VB.NET C#.NET

Dim hero As SuperHero = New SuperHero
' or
Dim hero As New SuperHero
  
With hero
 .Name = "SpamMan"
 .PowerLevel = 3
End With
  
hero.Defend("Laura Jones")
hero.Rest()   ' Calling Shared method
' or
SuperHero.Rest()
  
Dim hero2 As SuperHero = hero ' Both reference the same object
hero2.Name = "WormWoman"
Console.WriteLine(hero.Name)  ' Prints WormWoman
  
hero = Nothing   ' Free the object
  
If hero IsNothing Then _
 hero = New SuperHero
  
Dim obj As Object = New SuperHero
If TypeOf obj Is SuperHero Then _
 Console.WriteLine("Is a SuperHero object.")
  
' Mark object for quick disposal
Using reader As StreamReader = File.OpenText("test.txt")
 Dim line As String = reader.ReadLine()
 While Not line Is Nothing
  Console.WriteLine(line)
  line = reader.ReadLine()
 End While
End Using

SuperHero hero = new SuperHero();
  
// No "With" construct
hero.Name = "SpamMan";
hero.PowerLevel = 3;
  
hero.Defend("Laura Jones");
SuperHero.Rest();  // Calling static method
  
SuperHero hero2 = hero;  // Both reference the same object
hero2.Name = "WormWoman";
Console.WriteLine(hero.Name);  // Prints WormWoman
  
hero = null ;  // Free the object
  
if (hero == null)
 hero = new SuperHero();
  
Object obj = new SuperHero();
if (obj is SuperHero)
 Console.WriteLine("Is a SuperHero object.");
  
// Mark object for quick disposal
using (StreamReader reader = File.OpenText("test.txt")) {
 string line;
 while ((line = reader.ReadLine()) != null)
  Console.WriteLine(line);
}

2.17Structs
VB.NET C#.NET

Structure StudentRecord
 Public name As String
 Public gpa As Single
 Public Sub New(ByVal name As String, ByVal gpa As Single)
  Me.name = name
  Me.gpa = gpa
 End Sub
End Structure
  
Dim stu As StudentRecord = New StudentRecord("Bob", 3.5)
Dim stu2 As StudentRecord = stu 
stu2.name = "Sue"
Console.WriteLine(stu.name)  ' Prints Bob
Console.WriteLine(stu2.name) ' Prints Sue

struct StudentRecord {
 public string name;
 public float gpa;
 public StudentRecord(string name, float gpa) {
  this.name = name;
  this.gpa = gpa;
 }
}
  
StudentRecord stu = new StudentRecord("Bob", 3.5f);
StudentRecord stu2 = stu; 
stu2.name = "Sue";
Console.WriteLine(stu.name);  // Prints Bob
Console.WriteLine(stu2.name);  // Prints Sue

2.18Properties
VB.NET C#.NET

Private _size As Integer
Public Property Size() As Integer
 Get
  Return _size
 End Get
 Set (ByVal Value As Integer)
  If Value < 0 Then
   _size = 0
  Else
   _size = Value
  End If
 End Set
End Property
  
foo.Size += 1

private int _size;
public int Size {
 get {
  return _size;
 }
 set {
  if (value < 0)
   _size = 0;
  else
   _size = value;
 }
}
  
foo.Size++;

2.19Delegates / Events
VB.NET C#.NET

Delegate Sub MsgArrivedEventHandler(ByVal message As String)
  
Event MsgArrivedEvent As MsgArrivedEventHandler
  
' or to define an event which declares a delegate implicitly
Event MsgArrivedEvent(ByVal message As String)
  
AddHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback
' Won't throw an exception if obj is Nothing
RaiseEvent MsgArrivedEvent("Test message")
RemoveHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback
  
Imports System.Windows.Forms
  
Dim WithEvents MyButton As Button  ' WithEvents can't be used on local variable
MyButton = New Button
  
Private Sub MyButton_Click(ByVal sender As System.Object, _
 ByVal e As System.EventArgs) Handles MyButton.Click
 MessageBox.Show(Me, "Button was clicked", "Info", _
  MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub

delegate void MsgArrivedEventHandler(string message);
  
event MsgArrivedEventHandler MsgArrivedEvent;
  
// Delegates must be used with events in C#
MsgArrivedEvent += new MsgArrivedEventHandler(My_MsgArrivedEventCallback);
MsgArrivedEvent("Test message");  // Throws exception if obj is null
MsgArrivedEvent -= new MsgArrivedEventHandler(My_MsgArrivedEventCallback);
  
using System.Windows.Forms;
  
Button MyButton = new Button();
MyButton.Click += new System.EventHandler(MyButton_Click);
  
private void MyButton_Click(object sender, System.EventArgs e) {
 MessageBox.Show(this, "Button was clicked", "Info",
  MessageBoxButtons.OK, MessageBoxIcon.Information);
}

2.20Console I/O
VB.NET C#.NET

Console.Write("What's your name? ")
Dim name As String = Console.ReadLine()
Console.Write("How old are you? ")
Dim age As Integer = Val(Console.ReadLine())
Console.WriteLine("{0} is {1} years old.", name, age) 
' or
Console.WriteLine(name & " is " & age & " years old.")
Dim c As Integer
c = Console.Read()   'Read single char
Console.WriteLine(c)  ' Prints 65 if user enters "A"

Console.Write("What's your name? ");
string name = Console.ReadLine();
Console.Write("How old are you? ");
int age = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0} is {1} years old.", name, age);
// or
Console.WriteLine(name + " is " + age + " years old.");
  
int c = Console.Read(); // Read single char
Console.WriteLine(c);  // Prints 65 if user enters "A"

2.21File I/O
VB.NET C#.NET
Imports System.IO

 

' Write out to text file
Dim writer As StreamWriter = File.CreateText("c:"myfile.txt")
writer.WriteLine("Out to file.")
writer.Close()
  
' Read all lines from text file
Dim reader As StreamReader = File.OpenText("c:"myfile.txt")
Dim line As String = reader.ReadLine()
While Not line Is Nothing
 Console.WriteLine(line)
 line = reader.ReadLine()
End While
reader.Close()
  
' Write out to binary file
Dim str As String = "Text data"
Dim num As Integer = 123
Dim binWriter As New BinaryWriter(File.OpenWrite("c:"myfile.dat")) 
binWriter.Write(str) 
binWriter.Write(num)
binWriter.Close()
  
' Read from binary file
Dim binReader As New BinaryReader(File.OpenRead("c:"myfile.dat"))
str = binReader.ReadString()
num = binReader.ReadInt32()
binReader.Close()

using System.IO;

 

// Write out to text file
StreamWriter writer = File.CreateText("c:""myfile.txt");
writer.WriteLine("Out to file.");
writer.Close();
  
// Read all lines from text file
StreamReader reader = File.OpenText("c:""myfile.txt");
string line = reader.ReadLine();
while (line != null) {
 Console.WriteLine(line);
 line = reader.ReadLine();
}
reader.Close();
  
// Write out to binary file
string str = "Text data";
int num = 123;
BinaryWriter binWriter = new BinaryWriter(File.OpenWrite("c:""myfile.dat"));
binWriter.Write(str);
binWriter.Write(num);
binWriter.Close();
  
// Read from binary file
BinaryReader binReader = new BinaryReader(File.OpenRead("c:""myfile.dat"));
str = binReader.ReadString();
num = binReader.ReadInt32();
binReader.Close();

3.0  References

  http://www.harding.edu/fmccown/vbnet_csharp_comparison.html  



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