vb與C的語法區(qū)別

vb與C#的語法區(qū)別1.變量聲名

C#：

intx;

Strings;

Strings1,s2;

Objectobj;

Objectobj=newObject();

publicStringname;

VB語法

DimxAsInteger

DimsAsString

Dims1,s2AsString

Dimobj'ImplicitlyObject

DimobjAsNewObject()

PublicnameAsString

2語句

C#:

Response.Write("123456");

VB:

Response.Write("123456")3.注釋語句

//這是c#注釋

/*

C#的多行注

釋

*/VB:

'這是VB的注釋4.獲得URL傳遞的變量

C#:

Strings=Request.QueryString["Name"];

Stringvalue=Request.Cookies["key"];

VB:

Dims,valueAsString

s=Request.QueryString("Name")

value=Request.Cookies("Key").Value5.聲明屬性C#:

publicStringname{get{

...

return...;

}set{

...=value;

}}VB:

PublicPropertyNameAsStringGet

...

Return...;

EndGetSet

...=Value;

EndSetEndProperty6.數(shù)組

C#

String[]a=newString[10];

a[0]="1";

a[1]="2";

a[2]="3";

...

//二維數(shù)組

String[][]a=newString[3][3];

a[0][0]="1";

a[1][0]="2";

a[2][0]="3";

VB:

Dima(10)AsString

a(0)="1"

a(1)="2"

a(2)="3"

...Dima(3,3)AsString

a(0,0)="1"

a(1,0)="2"

a(2,0)="3"Dima()AsString

a(0,0)="1"

a(1,0)="2"

a(2,0)="3"Dima(,)AsString

a(0,0)="1"

a(1,0)="2"

a(2,0)="3"

7.變量初始化

C#:

Strings="HelloWorld";

inti=10;

double[]a={3.14,4.53,5.10};

VB:

DimsAsString="HelloWorld"

DimiAsInteger=10

Dima()AsDouble={3.14,4.53,5.10}8.判斷語句(If語句)

if(i!=10){

...

}VB:

IfNot(i=10)

...

EndIf9.分支語句(case語句)

C#:

switch(a){

case0:

...

break;

case1:

...

break;

case2:

...

break;

}

VB:

Select(a)

case0:

...

case1:

...

case2:

...

EndSelect10.For循環(huán)語句

C#

for(inti=0;i<10;i++)

a(i)=i;

VB:

DimIAsInteger

ForI=0To10

a(i)=i

Next11.While循環(huán)

C#:

inti=0;

while(i<10){

Console.WriteLine(i.ToString());

i++;

}

VB:

DimIAsInteger

I=0

DoWhileI<10

Console.WriteLine(I.ToString())

I=++

Loop

12.字符串連接

C#:

Strings1;

Strings2="hello";

s2+="world";

s1=s2+"!!!";

VB:

Dims1,s2AsString

s2="hello"

s2&="world"

s1=s2&"!!!"

聲明事件

C#:

voidMyButton_Click(Objectsender,EventArgsE){

...

}

VB:

SubMyButton_Click(SenderAsObject,EAsEventArgs)

...

EndSub

13.聲明Object

C#:

MyObjectobj=(MyObject)Session["XiaoYear"];

IMyObjectiObj=obj

VB:

DimbjAsMyObject

DimiObjAsIMyObject

obj=Session("XiaoYear")

iObj=CType(obj,IMyObject)

14.數(shù)據(jù)類型轉(zhuǎn)換

C#

inti=3;

Strings=i.ToString();

doubled=Double.Parse(s);

VB:

DimiAsInteger

DimsAsString

DimdAsDoublei=3

s=i.ToString()

d=CDbl(s)

15.類的聲明和繼承

C#:

usingSystem;

namespaceMySpace{

publicclassA:B{

intx;

publicF(){x=10;}

publicvoidAdd(intx){this.x+=x;}

publicintGetNum(){returnx;}

}

}VB:

ImportsSystem

NamespaceMySpace

PublicClassA:InheritsB

DimxAsInteger

PublicSubNew()

MyBase.New()

x=10

EndSubPublicSubAdd(xAsInteger)

Me.x=Me.x+x

EndSubPublicFunctionGetNum()AsInteger

Returnx

EndFunctionEndClassEndNamespace16.聲明類的主函數(shù)

C#:

usingSystem;

publicclassConsoleCS{

publicConsoleCS(){

Console.WriteLine("ObjectCreated");

}publicstaticvoidMain(String[]args){

Console.WriteLine("HelloWorld");

ConsoleCSccs=newConsoleCS();

}}VB"

ImportsSystem

PublicClassConsoleVB

PublicSubNew()

MyBase.N