1.变量声名
C# :
int x;
String s;
String s1,s2;
Object obj;
Object obj = new Object();
public String name;
VB语法
Dim x As Integer
Dim s As String
Dim s1,s2 As String
Dim obj 'Implicitly Object
Dim obj As New Object()
Public name As String
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: '这是VB的注释
4.获得URL 传递的变量 C#: String s = Request.QueryString["Name"]; String value = Request.Cookies["key"]; VB: Dim s,value As String s = Request.QueryString("Name") value = Request.Cookies("Key").Value
5.声明属性
C#: public String name {
get { ... return ...; }
set { ... = value; }
}
VB: Public Property Name As String
Get ... Return ...; End Get
Set ... = Value; End Set
End Property
6.数组 C# String[] a = new String[10]; a[0] = "1"; a[1] = "2"; a[2] = "3"; ... //二维数组 String[][] a = new String[3][3]; a[0][0] = "1"; a[1][0] = "2"; a[2][0] = "3"; VB: Dim a(10) As String a(0) = "1" a(1) = "2" a(2) = "3" ...
Dim a(3,3) As String a(0,0) = "1" a(1,0) = "2" a(2,0) = "3"
Dim a() As String a(0,0) = "3"
Dim a(,) As String a(0,0) = "3"
7.变量初始化 C#: String s = "Hello World"; int i = 10; double[] a = { 3.14,4.53,5.10 }; VB: Dim s As String = "Hello World" Dim i As Integer = 10 Dim a() As Double = { 3.14,5.10 }
8.判断语句(If 语句) if (i!=10) { ... }
VB: If Not (i=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=0; i<10; i++) a(i) = i; VB: Dim I As Integer For I = 0 To 10 a(i) = i Next
11. While 循环 C#: int i = 0; while (i<10) { Console.WriteLine(i.ToString()); i ++; } VB: Dim I As Integer I = 0 Do While I < 10 Console.WriteLine(I.ToString()) I = ++ Loop 12 .字符串连接 C#: String s1; String s2 = "hello"; s2 += " world"; s1 = s2 + " !!!"; VB: Dim s1,s2 As String s2 = "hello" s2 &= " world" s1 = 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 = (MyObject)Session["XiaoYear"]; IMyObject iObj = obj VB: Dim bj As MyObject Dim iObj As IMyObject obj = Session("XiaoYear") iObj = CType(obj,IMyObject)
14. 数据类型转换 C# int i = 3; String s = i.ToString(); double d = Double.Parse(s); VB: Dim i As Integer Dim s As String Dim d As Double
i = 3 s = i.ToString() d = CDbl(s)
15 .类的声明和继承 C#: using System; namespace MySpace { public class A : B { int x; public F() { x = 10; } public void Add(int x) { this.x += 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 = 10 End Sub
Public Sub Add(x As Integer) Me.x = Me.x + 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 = 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 = New ConsoleVB() End Sub
End Class (编辑:李大同)
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