VB与C#语法区别类比

2语句
C#:
Response.Write("123456");
VB:
Response.Write("123456")

3.注释语句
//这是c#注释
/*
C#的多行注
释
*/

VB:
&＃39;这是VB的注释

4.获得URL 传递的变量
C#:
String s &＃61; Request.QueryString["Name"];
String value &＃61; Request.COOKIEs["key"];
VB:
Dim s, value As String
s &＃61; Request.QueryString("Name")
value &＃61; Request.COOKIEs("Key").Value

5.声明属性

C#:
public String name {

get {
...
return ...;
}

set {
... &＃61; value;
}

}

VB:
Public Property Name As String

Get
...
Return ...;
End Get

Set
... &＃61; Value;
End Set

End Property

6.数组
C#
String[] a &＃61; new String[10];
a[0] &＃61; "1";
a[1] &＃61; "2";
a[2] &＃61; "3";
...
//二维数组
String[][] a &＃61; new String[3][3];
a[0][0] &＃61; "1";
a[1][0] &＃61; "2";
a[2][0] &＃61; "3";
VB:
Dim a(10) As String
a(0) &＃61; "1"
a(1) &＃61; "2"
a(2) &＃61; "3"
...

Dim a(3,3) As String
a(0,0) &＃61; "1"
a(1,0) &＃61; "2"
a(2,0) &＃61; "3"

Dim a() As String
a(0,0) &＃61; "1"
a(1,0) &＃61; "2"
a(2,0) &＃61; "3"

Dim a(,) As String
a(0,0) &＃61; "1"
a(1,0) &＃61; "2"
a(2,0) &＃61; "3"

7.变量初始化
C#:
String s &＃61; "Hello World";
int i &＃61; 10;
double[] a &＃61; { 3.14, 4.53, 5.10 };
VB:
Dim s As String &＃61; "Hello World"
Dim i As Integer &＃61; 10
Dim a() As Double &＃61; { 3.14, 4.53, 5.10 }

8.判断语句(If 语句)
if (i!&＃61;10) {
...
}

VB:
If Not (i&＃61;10)
...
End If

9.分支语句(case 语句)
C#:
switch (a) {
case 0 :
...
break;
case 1 :
...
break;
case 2 :
...
break;
}
VB:
Select (a)
case 0 :
...
case1 :
...
case 2 :
...
End Select

10 .For循环语句
C#
for (int i&＃61;0; i<10; i&＃43;&＃43;)
a(i) &＃61; i;
VB:
Dim I As Integer
For I &＃61; 0 To 10
a(i) &＃61; i
Next

11. While 循环
C#:
int i &＃61; 0;
while (i<10) {
Console.WriteLine(i.ToString());
i &＃43;&＃43;;
}
VB:
Dim I As Integer
I &＃61; 0
Do While I <10
Console.WriteLine(I.ToString())
I &＃61; &＃43;&＃43;
Loop
12 .字符串连接
C#:
String s1;
String s2 &＃61; "hello";
s2 &＃43;&＃61; " world";
s1 &＃61; s2 &＃43; " !!!";
VB:
Dim s1, s2 As String
s2 &＃61; "hello"
s2 &&＃61; " world"
s1 &＃61; s2 & " !!!"

声明事件
C#:
void MyButton_Click(Object sender, EventArgs E) {
...
}
VB:
Sub MyButton_Click(Sender As Object, E As EventArgs)
...
End Sub

13 .声明Object
C# :
MyObject obj &＃61; (MyObject)Session["XiaoYear"];
IMyObject iObj &＃61; obj
VB:
Dim bj As MyObject
Dim iObj As IMyObject
obj &＃61; Session("XiaoYear")
iObj &＃61; CType(obj, IMyObject)

14. 数据类型转换
C#
int i &＃61; 3;
String s &＃61; i.ToString();
double d &＃61; Double.Parse(s);
VB:
Dim i As Integer
Dim s As String
Dim d As Double

i &＃61; 3
s &＃61; i.ToString()
d &＃61; CDbl(s)

15 .类的声明和继承
C#:
using System;
namespace MySpace {
public class A : B {
int x;
public F() { x &＃61; 10; }
public void Add(int x) { this.x &＃43;&＃61; x; }
public int GetNum() { return x; }
}
}

VB:
Imports System
Namespace MySpace
Public Class A : Inherits B
Dim x As Integer
Public Sub New()
MyBase.New()
x &＃61; 10
End Sub

Public Sub Add(x As Integer)
Me.x &＃61; Me.x &＃43; x
End Sub

Public Function GetNum() As Integer
Return x
End Function

End Class

End Namespace

16. 声明类的主函数
C#:
using System;
public class ConsoleCS {
public ConsoleCS() {
Console.WriteLine("Object Created");
}

public static void Main (String[] args) {
Console.WriteLine("Hello World");
ConsoleCS ccs &＃61; new ConsoleCS();
}

}

VB "
Imports System
Public Class ConsoleVB
Public Sub New()
MyBase.New()
Console.WriteLine("Object Created")
End Sub

Public Shared Sub Main()
Console.WriteLine("Hello World")
Dim cvb As ConsoleVB
cvb &＃61; New ConsoleVB()
End Sub

End Class