从字符串中提取参数的任何自定义函数？ [英] Any custom function to extract parameters from strings?

问题描述

我曾经遇到VB6中的一个函数，该函数接收了3个参数Parameter，Match和Delimiter，它们可以从给定的字符串中提取信息，如下所示：

SiteAddress = XXXX; UID = XXXX; PWD = XXXX



例如，SiteAddress是一个参数，;是分隔符，=是匹配。我想知道是否有人可以帮助我用C＃编写一个。

解决方案

为什么自定义函数？尝试

 使用 StringDictionary = System.Collections.Specialized.StringDictionary; 
 
  //   ...  
 
 < span class =code-keyword> static  StringDictionary ParseKeyValues（ string  source， char  parameterDelimiter ， char  keyValueDelimiter）{
 StringDictionary result =  new  StringDictionary（）; 
  string  [] parameters = 
 source.Split（
  new   char  [] {parameterDelimiter}，
 System.StringSplitOptions.RemoveEmptyEntries）; 
  foreach （字符串参数 in 参数）{
  string  [] pair = parameter.Split（ new   char  [] {keyValueDelimiter}）; 
  string  key = pair [ 0 ];由于之前的拆分选项， //  始终存在 
  string   value  =  null ; 
  if （pair.Length >   1 ）
  value  = pair [ 1 ]; 
 result.Add（key， value ）;  //  可能会抛出异常 
}  //   loop  
  return 结果; 
}  //   ParseKeyValues  

正则表达式解决方案存在，但会更加丑陋，因为参数数量未知。

-SA

I once came across a function in VB6 that received 3 parameters "Parameter","Match" and "Delimiter" that could extract information from a given string as follows:
SiteAddress=XXXX;UID=XXXX;PWD=XXXX

In which SiteAddress, for example, is a parameter, ";" is the delimiter and "=" is the match. I wonder if anyone can help me have one written in C#.

解决方案

Why "custom functions"? Try something like

using StringDictionary = System.Collections.Specialized.StringDictionary;

// ...

static StringDictionary ParseKeyValues(string source, char parameterDelimiter, char keyValueDelimiter) {
    StringDictionary result = new StringDictionary();
    string[] parameters =
        source.Split(
            new char[] { parameterDelimiter },
            System.StringSplitOptions.RemoveEmptyEntries);
    foreach (string parameter in parameters) {
        string[] pair = parameter.Split(new char[] { keyValueDelimiter });
        string key = pair[0]; // always exist due to previous split options
        string value = null;
        if (pair.Length > 1)
            value = pair[1];
        result.Add(key, value); // may throw exception
    } //loop
    return result;
} //ParseKeyValues

A Regular Expression solution exist but will be uglier, as the number of parameters is unknown.

—SA

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