字符串分割的有效方法

发布于 2024-09-02 16:39:30 字数 680 浏览 6 评论 0原文

我有一个像这样的完整字符串

N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~~ N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:

这个字符串是这样的

  1. 它是由 ~~ 分隔的 PO(付款选项)列表
  2. 该列表可能包含一个或多个 OP
  3. PO 仅包含分隔的键值对by :
  4. 空格由 ++ 表示

我需要提取键“RGI”和“N”的值。

我可以通过 for 循环来做到这一点,我想要一种有效的方法来做到这一点。 对此有任何帮助。

编辑:从~~到~~

I have a completed string like this

N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~~ N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:

this string is like this

  1. It's list of PO's(Payment Options) which are separated by ~~
  2. this list may contains one or more OP
  3. PO contains only Key-Value Pairs which separated by :
  4. spaces are denoted by ++

I need to extract the values for Key "RGI" and "N".

I can do it via for loop , I want a efficient way to do this.
any help on this.

Edit: from ~ ~ To ~~

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话少心凉 2024-09-09 16:39:46

在“:”上使用 string.Split() 来提取键值对。

然后根据需要提取它们。如果字符串中的位置不固定,则需要在生成的 string[] 数组中的每个项目中搜索特定键。

如果您需要经常搜索,我会考虑拆分键值对并放入某种字典中。

Use string.Split() on ":" to extract the key-value pairs.

Then extract as you need them. If the positions in the string are not fixed,you will need to search each item in the resulting string[] array for a particular key.

If you need to search often, I would consider splitting the key-value pairs and placing in some sort of Dictionary.

蝶舞 2024-09-09 16:39:44

这是基于索引进行搜索的尝试:(我更喜欢我添加的 LINQ 解决方案)

string test = "N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:";
string[] parts = test.Split(new string[] { "~ ~" }, StringSplitOptions.None);            
var result = parts.Select(p => new
{
    N = p.Substring(p.IndexOf("N:") + 2,
        p.IndexOf("++") - (p.IndexOf("N:") + 2)),
    RGI = p.Substring(p.IndexOf("RGI:") + 4,
        p.IndexOf("++", p.IndexOf("RGI:")) - (p.IndexOf("RGI:") + 4))
});

创建具有以下值的两个对象的列表:

result = {{N = "Pay in Cash", RDI = 40}, {N = "ERedemption", RDI = 42}}

编辑:使用 LINQ 的解决方案

我决定尝试一下所有这些都使用 LINQ,这就是我的想法:

string test = "N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:";

 var result = test.Split(new string[] { "~ ~" }, StringSplitOptions.None).
     Select(m => m.Split(new string[] { "++" }, StringSplitOptions.None)).
     Select(p => p.Select(i => i.Split(':')).
         Where(o => o[0].Equals("N") || o[0].Equals("RGI")).
         Select(r => new { Key = r[0], Value = r[1]}));

它为每个包含仅 N 和 RGI 的键值对的项目生成数组。

result = {{{Key = "N", Value = "Pay in Cash"}, {Key = "RDI", Value = 40}},
          {{Key = "N", Value = "ERedemption"}, {Key = "RDI", Value = 42}}}

如果您愿意,您可以删除Where,它将包含所有键及其值。

Here is an attempt doing a search based on index: (I prefer my LINQ solution that I added)

string test = "N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:";
string[] parts = test.Split(new string[] { "~ ~" }, StringSplitOptions.None);            
var result = parts.Select(p => new
{
    N = p.Substring(p.IndexOf("N:") + 2,
        p.IndexOf("++") - (p.IndexOf("N:") + 2)),
    RGI = p.Substring(p.IndexOf("RGI:") + 4,
        p.IndexOf("++", p.IndexOf("RGI:")) - (p.IndexOf("RGI:") + 4))
});

Creates a list of two objects with following values:

result = {{N = "Pay in Cash", RDI = 40}, {N = "ERedemption", RDI = 42}}

EDIT: SOLUTION USING LINQ

I decided to try and do it all with LINQ and here is what I came up with:

string test = "N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:";

 var result = test.Split(new string[] { "~ ~" }, StringSplitOptions.None).
     Select(m => m.Split(new string[] { "++" }, StringSplitOptions.None)).
     Select(p => p.Select(i => i.Split(':')).
         Where(o => o[0].Equals("N") || o[0].Equals("RGI")).
         Select(r => new { Key = r[0], Value = r[1]}));

It produces and array for each item that contains a Key Value pair of only N and RGI.

result = {{{Key = "N", Value = "Pay in Cash"}, {Key = "RDI", Value = 40}},
          {{Key = "N", Value = "ERedemption"}, {Key = "RDI", Value = 42}}}

If you want you can remove the Where and it will include all they Keys and their Values.

少年亿悲伤 2024-09-09 16:39:43

听着,我使用了正则表达式,对于相当数量的文本,它们表现良好。

 static void Main(string[] args)
{
    string str = @"N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:"; 
    System.Text.RegularExpressions.MatchCollection MC = System.Text.RegularExpressions.Regex.Matches(str,@"((RGI|N):.*?)\+\+");
    foreach( Match Foundmatch in MC)
    {
        string[] s = Foundmatch.Groups[1].Value.Split(':');
        Console.WriteLine("Key {0} Value {1} " ,s[0],s[1]);

    }

}

hear ya go I used regular expressions and for a reasonable amount of text they preform well.

 static void Main(string[] args)
{
    string str = @"N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:"; 
    System.Text.RegularExpressions.MatchCollection MC = System.Text.RegularExpressions.Regex.Matches(str,@"((RGI|N):.*?)\+\+");
    foreach( Match Foundmatch in MC)
    {
        string[] s = Foundmatch.Groups[1].Value.Split(':');
        Console.WriteLine("Key {0} Value {1} " ,s[0],s[1]);

    }

}
妖妓 2024-09-09 16:39:41

您可以将字符串解析为字典,然后提取您的值......

string s = "N:Pay in Cash++RGI:40++R:200++";

// Replace "++" with ","
s.Replace("++",",");

// Divide all pairs (remove empty strings)
string[] tokens = s.Split(new char[] { ':', ',' }, StringSplitOptions.RemoveEmptyEntries);

Dictionary<string, string> d = new Dictionary<string, string>();

for (int i = 0; i < tokens.Length; i += 2)
{
    string key = tokens[i];
    string value = tokens[i + 1];

    d.Add(key,value);
}

You could parse the string into a dictionary and then pull in your values...

string s = "N:Pay in Cash++RGI:40++R:200++";

// Replace "++" with ","
s.Replace("++",",");

// Divide all pairs (remove empty strings)
string[] tokens = s.Split(new char[] { ':', ',' }, StringSplitOptions.RemoveEmptyEntries);

Dictionary<string, string> d = new Dictionary<string, string>();

for (int i = 0; i < tokens.Length; i += 2)
{
    string key = tokens[i];
    string value = tokens[i + 1];

    d.Add(key,value);
}
国粹 2024-09-09 16:39:39

我认为你应该尝试正则表达式。由于您使用的是 C#,请查看这个方便的 .NET RegEx 备忘单

I think you should try a regular expression. Since you are using C#, check out this handy .NET RegEx cheat sheet.

淡淡の花香 2024-09-09 16:39:37

不知道它是否比 RegEx 更有效,但这里有一个使用 LINQ to Objects 的替代方案。

KeyValuePair<string, string>[] ns = (from po in pos.Split(new string[] { "~~" }, StringSplitOptions.RemoveEmptyEntries)
                                     from op in po.Split(new string[] { "++" }, StringSplitOptions.RemoveEmptyEntries)
                                     where op.StartsWith("N:") || op.StartsWith("RGI:")
                                     let op_split = op.Split(':')
                                     select new KeyValuePair<string, string>(op_split[0], op_split[1])).ToArray();

Don't know if it's more efficient than RegEx, but here's a alternative using LINQ to Objects.

KeyValuePair<string, string>[] ns = (from po in pos.Split(new string[] { "~~" }, StringSplitOptions.RemoveEmptyEntries)
                                     from op in po.Split(new string[] { "++" }, StringSplitOptions.RemoveEmptyEntries)
                                     where op.StartsWith("N:") || op.StartsWith("RGI:")
                                     let op_split = op.Split(':')
                                     select new KeyValuePair<string, string>(op_split[0], op_split[1])).ToArray();
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