检查互联网连接 [英] Check Internet connection

问题描述

我使用此示例来检查计算机是否已连接到Internet，但它给我3个错误.为什么这样?

这里是示例:

I'' m using this sample to check if the machine is connected to Internet, but it gives me 3 errors. Why'' s that?

Here is the sample:

<br />using System;<br />using System.Runtime;<br />using System.Runtime.InteropServices;<br /><br />class IsConnected<br />{<br />    //Creating the extern function...<br />    [DllImport("wininet.dll")]<br />    private extern static bool InternetGetConnectedState(int out Description, int ReservedValue);<br /><br />    //Creating a function that uses the API function...<br />    public static bool IsConnectedToInternet()<br />    {<br />        int Desc;<br /><br />        return InternetGetConnectedState(out Desc, 0);<br />    }<br />}<br />

这里是错误:

Here are the errors:

<br />Error 1: Identifier expected; ''out'' is a keyword | Line: 9<br />Error 2: Invalid token '','' in class, struct, or interface member declaration | Line: 9<br />Error 3: ; expected | Line: 9<br />

推荐答案

我猜你必须写InternetGetConnectedState(out int Description, ....

I guess you have to write InternetGetConnectedState(out int Description, ....

更改为此行...

change to this line...

private extern static bool InternetGetConnectedState(out int Description, int ReservedValue);

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