{"id":79,"date":"2008-02-15T00:02:47","date_gmt":"2008-02-15T00:02:47","guid":{"rendered":""},"modified":"2008-02-15T00:02:47","modified_gmt":"2008-02-15T00:02:47","slug":"79","status":"publish","type":"post","link":"https:\/\/www.poloo.org\/?p=79","title":{"rendered":"C# \u7f16\u7801\u89c4\u8303\u548c\u7f16\u7a0b\u597d\u4e60\u60ef"},"content":{"rendered":"

\u64b0\u6587\uff1aDotNetSpider.com\uff08http:\/\/www.dotnetspider.com<\/a>\uff09<\/p>\n

\u7ffb\u8bd1\uff1a\u6768\u8d3a\u5b8f<\/p>\n

\u8c01\u90fd\u4f1a\u5199\u4ee3\u7801\uff01\u51e0\u4e2a\u6708\u7684\u7f16\u7a0b\u7ecf\u9a8c\u53ef\u4ee5\u8ba9\u4f60\u5199\u51fa\u201c\u53ef\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f\u201d\u3002\u8ba9\u5b83\u53ef\u8fd0\u884c\u5bb9\u6613\uff0c\u4f46\u662f\u4ee5\u6700\u6709\u6548\u7387\u7684\u65b9\u5f0f\u7f16\u7801\u5c31\u9700\u8981\u4e0b\u66f4\u591a\u7684\u529f\u592b\uff01<\/p>\n

\u8981\u77e5\u9053\uff0c\u5927\u591a\u6570\u7a0b\u5e8f\u5458\u5728\u5199\u201d\u53ef\u8fd0\u884c\u4ee3\u7801\uff0c\u201c\u800c\u4e0d\u662f\u201d\u9ad8\u6548\u4ee3\u7801\u201c\u3002\u6211\u4eec\u5728\u8fd9\u4e2a\u6307\u5357\u8bfe\u7a0b\u524d\u9762\u63d0\u5230\uff0c\u4f60\u60f3\u6210\u4e3a\u4f60\u4eec\u516c\u53f8\u201d\u6700\u5c0a\u8d35\u7684\u4e13\u4e1a\u4eba\u5458\u201c\u5417\uff1f\u5199\u201d\u9ad8\u6548\u4ee3\u7801\u201c\u662f\u4e00\u9879\u827a\u672f\uff0c\u4f60\u5fc5\u987b\u5b66\u4e60\u548c\u5b9e\u8df5\u5b83\u3002<\/p>\n

\u547d\u540d\u60ef\u4f8b\u548c\u89c4\u8303<\/p>\n

\u6ce8\u8bb0 :
Pascal \u5927\u5c0f\u5199\u5f62\u5f0f\uff0d\u6240\u6709\u5355\u8bcd\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u5927\u5199\uff0c\u5176\u4ed6\u5b57\u6bcd\u5c0f\u5199\u3002
Camel   \u5927\u5c0f\u5199\u5f62\u5f0f\uff0d\u9664\u4e86\u7b2c\u4e00\u4e2a\u5355\u8bcd\uff0c\u6240\u6709\u5355\u8bcd\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u5927\u5199\uff0c\u5176\u4ed6\u5b57\u6bcd\u5c0f\u5199\u3002<\/p>\n

\u7c7b\u540d\u4f7f\u7528Pascal \u5927\u5c0f\u5199\u5f62\u5f0f
public class HelloWorld{ …}<\/p>\n

\u65b9\u6cd5\u4f7f\u7528Pascal \u5927\u5c0f\u5199\u5f62\u5f0f
public class HelloWorld{ void SayHello(string name) {  … }}
\u53d8\u91cf\u548c\u65b9\u6cd5\u53c2\u6570\u4f7f\u7528Camel \u5927\u5c0f\u5199\u5f62\u5f0f <\/p>\n

public class HelloWorld{ int totalCount = 0; void SayHello(string name) {  string fullMessage = “Hello ” + name;  … }}  \u4e0d\u8981\u4f7f\u7528\u5308\u7259\u5229\u65b9\u6cd5\u6765\u547d\u540d\u53d8\u91cf <\/p>\n

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string m_sName;int nAge;    \u7136\u800c\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5728.NET\u7f16\u7801\u89c4\u8303\u4e2d\u662f\u4e0d\u63a8\u8350\u7684\u3002\u6240\u6709\u53d8\u91cf\u90fd\u7528camel \u5927\u5c0f\u5199\u5f62\u5f0f\uff0c\u800c\u4e0d\u662f\u7528\u6570\u636e\u7c7b\u578b\u548cm_\u6765\u4f5c\u524d\u7f00\u3002 <\/p>\n

\u7528\u6709\u610f\u4e49\u7684\uff0c\u63cf\u8ff0\u6027\u7684\u8bcd\u8bed\u6765\u547d\u540d\u53d8\u91cf <\/p>\n

– \u522b\u7528\u7f29\u5199\u3002\u7528name, address, salary\u7b49\u4ee3\u66ff nam, addr, sal
– \u522b\u4f7f\u7528\u5355\u4e2a\u5b57\u6bcd\u7684\u53d8\u91cf\u8c61i, n, x \u7b49. \u4f7f\u7528 index, temp\u7b49
\u7528\u4e8e\u5faa\u73af\u8fed\u4ee3\u7684\u53d8\u91cf\u4f8b\u5916\uff1a
for ( int i = 0; i < count; i++ ){ …}\u5982\u679c\u53d8\u91cf\u53ea\u7528\u4e8e\u8fed\u4ee3\u8ba1\u6570\uff0c\u6ca1\u6709\u5728\u5faa\u73af\u7684\u5176\u4ed6\u5730\u65b9\u51fa\u73b0\uff0c\u8bb8\u591a\u4eba\u8fd8\u662f\u559c\u6b22\u7528\u5355\u4e2a\u5b57\u6bcd\u7684\u53d8\u91cf(i) \uff0c\u800c\u4e0d\u662f\u53e6\u5916\u53d6\u540d\u3002
– \u53d8\u91cf\u540d\u4e2d\u4e0d\u4f7f\u7528\u4e0b\u5212\u7ebf (_) \u3002
– \u547d\u540d\u7a7a\u95f4\u9700\u6309\u7167\u6807\u51c6\u7684\u6a21\u5f0f\u547d\u540d<\/p>\n

…<\/p>\n

\u6587\u4ef6\u540d\u8981\u548c\u7c7b\u540d\u5339\u914d <\/p>\n

\u4f8b\u5982\uff0c\u5bf9\u4e8e\u7c7bHelloWorld, \u76f8\u5e94\u7684\u6587\u4ef6\u540d\u5e94\u4e3a helloworld.cs (\u6216, helloworld.vb)
\u7f29\u8fdb\u548c\u95f4\u9694
\u7f29\u8fdb\u7528 TAB . \u4e0d\u7528 SPACES.\u3002
\u6ce8\u91ca\u9700\u548c\u4ee3\u7801\u5bf9\u9f50.\u3002
\u82b1\u62ec\u5f27 ( {} ) \u9700\u548c\u62ec\u53f7\u5916\u7684\u4ee3\u7801\u5bf9\u9f50.\u3002
\u7528\u4e00\u4e2a\u7a7a\u884c\u6765\u5206\u5f00\u4ee3\u7801\u7684\u903b\u8f91\u5206\u7ec4\u3002. <\/p>\n

bool SayHello (string name) {  string fullMessage = “Hello ” + name;  DateTime currentTime = DateTime.Now;  string message = fullMessage + “, the time is : ” + currentTime.ToShortTimeString();  MessageBox.Show ( message );  if ( … )  {   \/\/ Do something   \/\/ …   return false;  }  return true; }              \u8fd9\u6bb5\u4ee3\u7801\u770b\u8d77\u6765\u6bd4\u4e0a\u9762\u7684\u597d\uff1a:
bool SayHello ( string name ) {  string fullMessage = “Hello ” + name;  DateTime currentTime = DateTime.Now;    string message = fullMessage + “, the time is : ” + currentTime.ToShortTimeString();    MessageBox.Show ( message );    if ( … )  {   \/\/ Do something   \/\/ …      return false;  }    return true; }              \u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u5404\u4e2a\u65b9\u6cd5\u9700\u7528\u4e00\u7a7a\u884c\uff0c\u4e5f\u53ea\u80fd\u662f\u4e00\u884c\u5206\u5f00\u3002
\u82b1\u62ec\u5f27\u9700\u72ec\u7acb\u4e00\u884c\uff0c\u800c\u4e0d\u8c61if, for \u7b49\u53ef\u4ee5\u8ddf\u62ec\u53f7\u5728\u540c\u4e00\u884c\u3002.
\u597d\uff1a
  if ( … )   {   \/\/ Do something  }\u4e0d\u597d\uff1a
  if ( … ) {   \/\/ Do something  }\u5728\u6bcf\u4e2a\u8fd0\u7b97\u7b26\u548c\u62ec\u53f7\u7684\u524d\u540e\u90fd\u7a7a\u4e00\u683c\u3002. <\/p>\n

\u597d\uff1a
  if ( showResult == true )  {   for ( int i = 0; i < 10; i++ )   {    \/\/   }  }\u4e0d\u597d\uff1a
  if(showResult==true)  {   for(int i= 0;i<10;i++)   {    \/\/   }  }\u826f\u597d\u7684\u7f16\u7a0b\u4e60\u60ef<\/p>\n

\u9075\u4ece\u4ee5\u4e0b\u826f\u597d\u7684\u4e60\u60ef\u4ee5\u5199\u51fa\u597d\u7a0b\u5e8f <\/p>\n

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\u65b9\u6cd5\u540d\u9700\u80fd\u770b\u51fa\u5b83\u4f5c\u4ec0\u4e48\u3002\u522b\u4f7f\u7528\u4f1a\u5f15\u8d77\u8bef\u89e3\u7684\u540d\u5b57\u3002\u5982\u679c\u540d\u5b57\u4e00\u76ee\u4e86\u7136\uff0c\u5c31\u65e0\u9700\u7528\u6587\u6863\u6765\u89e3\u91ca\u65b9\u6cd5\u7684\u529f\u80fd\u4e86\u3002<\/p>\n

\u597d\uff1a
void SavePhoneNumber ( string phoneNumber ) {  \/\/ Save the phone number. }
\u4e0d\u597d\uff1a
\/\/ This method will save the phone number. void SaveData ( string phoneNumber ) {  \/\/ Save the phone number. }\u4e00\u4e2a\u65b9\u6cd5\u53ea\u5b8c\u6210\u4e00\u4e2a\u4efb\u52a1\u3002\u4e0d\u8981\u628a\u591a\u4e2a\u4efb\u52a1\u7ec4\u5408\u5230\u4e00\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u5373\u4f7f\u90a3\u4e9b\u4efb\u52a1\u975e\u5e38\u5c0f\u3002<\/p>\n

\u597d\uff1a
\/\/ Save the address. SaveAddress (  address );  \/\/ Send an email to the supervisor to inform that the address is updated. SendEmail ( address, email );    void SaveAddress ( string address ) {  \/\/ Save the address.  \/\/ … }  void SendEmail ( string address, string email ) {  \/\/ Send an email to inform the supervisor that the address is changed.  \/\/ … }
\u4e0d\u597d\uff1a
\/\/ Save address and send an email to the supervisor to inform that the address is updated. SaveAddress ( address, email ); void SaveAddress ( string address, string email ) {  \/\/ Job 1.  \/\/ Save the address.  \/\/ …  \/\/ Job 2.  \/\/ Send an email to inform the supervisor that the address is changed.  \/\/ … }\u4f7f\u7528C# \u6216 VB.NET\u7684\u7279\u6709\u7c7b\u578b\uff0c\u800c\u4e0d\u662fSystem\u547d\u540d\u7a7a\u95f4\u4e2d\u5b9a\u4e49\u7684\u522b\u540d\u7c7b\u578b\u3002<\/p>\n

\u597d\uff1a
int age; string name; object contactInfo;
\u4e0d\u597d\uff1a
Int16 age; String name; Object contactInfo; \u522b\u5728\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u56fa\u5b9a\u6570\u503c\uff0c\u7528\u5e38\u91cf\u4ee3\u66ff\u3002
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\u5fc5\u8981\u65f6\u4f7f\u7528enum \u3002\u522b\u7528\u6570\u5b57\u6216\u5b57\u7b26\u4e32\u6765\u6307\u793a\u79bb\u6563\u503c\u3002
\u597d\uff1a
enum MailType {  Html,  PlainText,  Attachment } void SendMail (string message, MailType mailType) {  switch ( mailType )  {   case MailType.Html:    \/\/ Do something    break;   case MailType.PlainText:    \/\/ Do something    break;   case MailType.Attachment:    \/\/ Do something    break;   default:    \/\/ Do something    break;  } }            <\/p>\n

\u4e0d\u597d\uff1a
void SendMail (string message, string mailType) {  switch ( mailType )  {   case “Html”:    \/\/ Do something    break;   case “PlainText”:    \/\/ Do something    break;   case “Attachment”:    \/\/ Do something    break;   default:    \/\/ Do something    break;  } }\u522b\u628a\u6210\u5458\u53d8\u91cf\u58f0\u660e\u4e3a public \u6216 protected\u3002\u90fd\u58f0\u660e\u4e3a private \u800c\u4f7f\u7528 public\/protected \u7684Properties.
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\u9519\u8bef\u6d88\u606f\u9700\u80fd\u5e2e\u52a9\u7528\u6237\u89e3\u51b3\u95ee\u9898\u3002\u6c38\u8fdc\u522b\u7528\u8c61”\u5e94\u7528\u7a0b\u5e8f\u51fa\u9519”, “\u53d1\u73b0\u4e00\u4e2a\u9519\u8bef” \u7b49\u9519\u8bef\u6d88\u606f\u3002\u800c\u5e94\u7ed9\u51fa\u8c61 “\u66f4\u65b0\u6570\u636e\u5e93\u5931\u8d25\u3002\u8bf7\u786e\u4fdd\u767b\u9646id\u548c\u5bc6\u7801\u6b63\u786e\u3002” \u7684\u5177\u4f53\u6d88\u606f\u3002  
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\u597d\uff1a
void ReadFromFile ( string fileName ) {  try  {   \/\/ read from file.  }  catch (FileIOException ex)  {   \/\/ log error.   \/\/  re-throw exception depending on your case.   throw;  } }\u4e0d\u597d\uff1a
void ReadFromFile ( string fileName ) {  try  {   \/\/ read from file.  }  catch (Exception ex)   {   \/\/ Catching general exception is bad… we will never know whether it   \/\/ was a file error or some other error.      \/\/ Here you are hiding an exception.    \/\/ In this case no one will ever know that an exception happened.   return “”;    } }\u4e0d\u5fc5\u5728\u6240\u6709\u65b9\u6cd5\u4e2d\u6355\u6349\u4e00\u822c\u5f02\u5e38\u3002\u4e0d\u7ba1\u5b83\uff0c\u8ba9\u7a0b\u5e8f\u5d29\u6e83\u3002\u8fd9\u5c06\u5e2e\u52a9\u4f60\u5728\u5f00\u53d1\u5468\u671f\u53d1\u73b0\u5927\u591a\u6570\u7684\u9519\u8bef\u3002
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