展現(xiàn)C# 清單5.10 生成exe文件執(zhí)行的問題

2024-07-21 02:16:04

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清單 5.10 通過一個(gè)索引獲取一個(gè)ip地址

1: using system;
2: using system.net;
3:
4: class resolvedns
5: {
6: ipaddress[] m_arrips;
7:
8: public void resolve(string strhost)
9: {
10: iphostentry iphe = dns.gethostbyname(strhost);
11: m_arrips = iphe.addresslist;
12: }
13:
14: public ipaddress this[int nindex]
15: {
16: get
17: {
18:    return m_arrips[nindex];
19: }
20: }
21:
22: public int count
23: {
24: get { return m_arrips.length; }
25: }
26: }
27:
28: class dnsresolverapp
29: {
30: public static void main()
31: {
32: resolvedns mydnsresolver = new resolvedns();
33: mydnsresolver.resolve("http://www.microsoft.com");
34:
35: int ncount = mydnsresolver.count;
36: console.writeline("found {0} ip's for hostname", ncount);
37: for (int i=0; i < ncount; i++)
38:    console.writeline(mydnsresolver[i]);
39: }
40: }

編譯環(huán)境：

visual studio .net2003 version 7.1.3091 microsoft visual c# .net

microsoft .net framework version 1.1.4322 sp1

生成的exe文件，執(zhí)行后報(bào)錯(cuò)：

未處理的“system.net.sockets.socketexception”類型的異常出現(xiàn)在 system.dll 中。

其他信息: the requested name is valid and was found in the database, but it does not have the correct associated data being resolved for

這是為什么呢？……

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