asp+ 現在支持兩種語言C# (簡稱 "C Sharp"), Visual Basic, and JScript. 基于習慣，在以下的語言介紹中，我們采用的練習和例程采用VB和C#語言來開發Web應用程序.如果想要得到關于.Net技術的詳細資料，請去MS的站點 查看關于 NGWS SDK! 在下面的列表中，你可以看到關于這兩種語言的語法的簡要介紹 1.變量聲名 C# 語法 int x; String s; String s1, s2; Object o; Object obj = new Object(); public String name; VB語法 Dim x As Integer Dim s As String Dim s1, s2 As String Dim o 'Implicitly Object Dim obj As New Object() Public name As String
VB: '豆腐制作，都是精品 ' 豆腐制作 '， '都是精品 4.獲得URL 傳遞的變量 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.聲明屬性 C#: public String name {
End Property 6.數組 C# String[] a = new String[3]; a[0] = "1"; a[1] = "2"; a[2] = "3"; //二維數組 String[][] a = new String[3][3]; a[0][0] = "1"; a[1][0] = "2"; a[2][0] = "3"; VB: Dim a(3) 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) = "1" a(1,0) = "2" a(2,0) = "3"
Dim a(,) As String a(0,0) = "1" a(1,0) = "2" a(2,0) = "3"
7變量初始化 C#: String s = "Hello World"; int i = 1 double[] a = { 3.00, 4.00, 5.00 }; VB: Dim s As String = "Hello World" Dim i As Integer = 1 Dim a() As Double = { 3.00, 4.00, 5.00 }
8;判斷語句(If 語句) if (Request.QueryString != null) { ... }
VB: If Not (Request.QueryString = Null) ... End If
9.分支語句(case 語句) C#: switch (FirstName) { case "John" : ... break; case "Paul" : ... break; case "Ringo" : ... break; } VB: Select (FirstName) case "John" : ... case "Paul" : ... case "Ringo" : ... End Select
10 For循環語句 C# for (int i=0; i<3; i++) a(i) = "test"; VB: Dim I As Integer For I = 0 To 2 a(I) = "test" Next
11 While 循環 C#: int i = 0; while (i<3) { Console.WriteLine(i.ToString()); i += 1; } VB: Dim I As Integer I = 0 Do While I < 3 Console.WriteLine(I.ToString()) I = I + 1 Loop 12 字符串連接 C#: String s1; String s2 = "hello"; s2 += " world"; s1 = s2 + " !!!"; VB: Dim s1, s2 As String s2 = "hello" s2 &= " world" s1 = s2 & " !!!"
聲明事件 C#: void MyButton_Click(Object sender, EventArgs E) { ... } VB: Sub MyButton_Click(Sender As Object, E As EventArgs) ... End Sub
13 聲明Object C# MyObject obj = (MyObject)session["Some Value"]; IMyObject iObj = obj VB: Dim bj As MyObject Dim iObj As IMyObject obj = Session("Some Value") iObj = CType(obj, IMyObject)
14 數據類型轉換 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 類的聲明和繼承 C#: using System;
namespace MySpace {
public class Foo : Bar {
int x;
public Foo() { x = 4; } public void Add(int x) { this.x += x; } public int GetNum() { return x; } }
}
VB: Imports System
Namespace MySpace
Public Class Foo : Inherits Bar
Dim x As Integer
Public Sub New() MyBase.New() x = 4 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 聲明類的主函數 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
17 標準模塊 C# using System;
public class Module {
public static void Main (String[] args) { Console.WriteLine("Hello World"); }
} VB: Imports System
Public Module ConsoleVB
Public Sub Main() Console.WriteLine("Hello World") End Sub
